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'use strict';
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var uuidV4 = _interopDefault(require('uuid'));
var lie = _interopDefault(require('lie'));
var getArguments = _interopDefault(require('argsarray'));
var cloneBuffer = _interopDefault(require('clone-buffer'));
var events = require('events');
var events__default = _interopDefault(events);
var inherits = _interopDefault(require('inherits'));
var debug = _interopDefault(require('debug'));
var vm = _interopDefault(require('vm'));
var levelup = _interopDefault(require('levelup'));
var ltgt = _interopDefault(require('ltgt'));
var Codec = _interopDefault(require('level-codec'));
var ReadableStreamCore = _interopDefault(require('readable-stream'));
var through2 = require('through2');
var Deque = _interopDefault(require('double-ended-queue'));
var bufferFrom = _interopDefault(require('buffer-from'));
var crypto = _interopDefault(require('crypto'));
var vuvuzela = _interopDefault(require('vuvuzela'));
var fs = _interopDefault(require('fs'));
var path = _interopDefault(require('path'));
var LevelWriteStream = _interopDefault(require('level-write-stream'));
/* istanbul ignore next */
var PouchPromise$1 = typeof Promise === 'function' ? Promise : lie;
function isBinaryObject(object) {
return object instanceof Buffer;
}
// most of this is borrowed from lodash.isPlainObject:
// https://github.com/fis-components/lodash.isplainobject/
// blob/29c358140a74f252aeb08c9eb28bef86f2217d4a/index.js
var funcToString = Function.prototype.toString;
var objectCtorString = funcToString.call(Object);
function isPlainObject(value) {
var proto = Object.getPrototypeOf(value);
/* istanbul ignore if */
if (proto === null) { // not sure when this happens, but I guess it can
return true;
}
var Ctor = proto.constructor;
return (typeof Ctor == 'function' &&
Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
}
function clone(object) {
var newObject;
var i;
var len;
if (!object || typeof object !== 'object') {
return object;
}
if (Array.isArray(object)) {
newObject = [];
for (i = 0, len = object.length; i < len; i++) {
newObject[i] = clone(object[i]);
}
return newObject;
}
// special case: to avoid inconsistencies between IndexedDB
// and other backends, we automatically stringify Dates
if (object instanceof Date) {
return object.toISOString();
}
if (isBinaryObject(object)) {
return cloneBuffer(object);
}
if (!isPlainObject(object)) {
return object; // don't clone objects like Workers
}
newObject = {};
for (i in object) {
/* istanbul ignore else */
if (Object.prototype.hasOwnProperty.call(object, i)) {
var value = clone(object[i]);
if (typeof value !== 'undefined') {
newObject[i] = value;
}
}
}
return newObject;
}
function once(fun) {
var called = false;
return getArguments(function (args) {
/* istanbul ignore if */
if (called) {
// this is a smoke test and should never actually happen
throw new Error('once called more than once');
} else {
called = true;
fun.apply(this, args);
}
});
}
function toPromise(func) {
//create the function we will be returning
return getArguments(function (args) {
// Clone arguments
args = clone(args);
var self = this;
// if the last argument is a function, assume its a callback
var usedCB = (typeof args[args.length - 1] === 'function') ? args.pop() : false;
var promise = new PouchPromise$1(function (fulfill, reject) {
var resp;
try {
var callback = once(function (err, mesg) {
if (err) {
reject(err);
} else {
fulfill(mesg);
}
});
// create a callback for this invocation
// apply the function in the orig context
args.push(callback);
resp = func.apply(self, args);
if (resp && typeof resp.then === 'function') {
fulfill(resp);
}
} catch (e) {
reject(e);
}
});
// if there is a callback, call it back
if (usedCB) {
promise.then(function (result) {
usedCB(null, result);
}, usedCB);
}
return promise;
});
}
function logApiCall(self, name, args) {
/* istanbul ignore if */
if (self.constructor.listeners('debug').length) {
var logArgs = ['api', self.name, name];
for (var i = 0; i < args.length - 1; i++) {
logArgs.push(args[i]);
}
self.constructor.emit('debug', logArgs);
// override the callback itself to log the response
var origCallback = args[args.length - 1];
args[args.length - 1] = function (err, res) {
var responseArgs = ['api', self.name, name];
responseArgs = responseArgs.concat(
err ? ['error', err] : ['success', res]
);
self.constructor.emit('debug', responseArgs);
origCallback(err, res);
};
}
}
function adapterFun(name, callback) {
return toPromise(getArguments(function (args) {
if (this._closed) {
return PouchPromise$1.reject(new Error('database is closed'));
}
if (this._destroyed) {
return PouchPromise$1.reject(new Error('database is destroyed'));
}
var self = this;
logApiCall(self, name, args);
if (!this.taskqueue.isReady) {
return new PouchPromise$1(function (fulfill, reject) {
self.taskqueue.addTask(function (failed) {
if (failed) {
reject(failed);
} else {
fulfill(self[name].apply(self, args));
}
});
});
}
return callback.apply(this, args);
}));
}
function mangle(key) {
return '$' + key;
}
function unmangle(key) {
return key.substring(1);
}
function Map$1() {
this._store = {};
}
Map$1.prototype.get = function (key) {
var mangled = mangle(key);
return this._store[mangled];
};
Map$1.prototype.set = function (key, value) {
var mangled = mangle(key);
this._store[mangled] = value;
return true;
};
Map$1.prototype.has = function (key) {
var mangled = mangle(key);
return mangled in this._store;
};
Map$1.prototype.delete = function (key) {
var mangled = mangle(key);
var res = mangled in this._store;
delete this._store[mangled];
return res;
};
Map$1.prototype.forEach = function (cb) {
var keys = Object.keys(this._store);
for (var i = 0, len = keys.length; i < len; i++) {
var key = keys[i];
var value = this._store[key];
key = unmangle(key);
cb(value, key);
}
};
Object.defineProperty(Map$1.prototype, 'size', {
get: function () {
return Object.keys(this._store).length;
}
});
function Set$1(array) {
this._store = new Map$1();
// init with an array
if (array && Array.isArray(array)) {
for (var i = 0, len = array.length; i < len; i++) {
this.add(array[i]);
}
}
}
Set$1.prototype.add = function (key) {
return this._store.set(key, true);
};
Set$1.prototype.has = function (key) {
return this._store.has(key);
};
Set$1.prototype.forEach = function (cb) {
this._store.forEach(function (value, key) {
cb(key);
});
};
Object.defineProperty(Set$1.prototype, 'size', {
get: function () {
return this._store.size;
}
});
/* global Map,Set,Symbol */
// Based on https://kangax.github.io/compat-table/es6/ we can sniff out
// incomplete Map/Set implementations which would otherwise cause our tests to fail.
// Notably they fail in IE11 and iOS 8.4, which this prevents.
function supportsMapAndSet() {
if (typeof Symbol === 'undefined' || typeof Map === 'undefined' || typeof Set === 'undefined') {
return false;
}
var prop = Object.getOwnPropertyDescriptor(Map, Symbol.species);
return prop && 'get' in prop && Map[Symbol.species] === Map;
}
// based on https://github.com/montagejs/collections
/* global Map,Set */
var ExportedSet;
var ExportedMap;
{
if (supportsMapAndSet()) { // prefer built-in Map/Set
ExportedSet = Set;
ExportedMap = Map;
} else { // fall back to our polyfill
ExportedSet = Set$1;
ExportedMap = Map$1;
}
}
// like underscore/lodash _.pick()
function pick(obj$$1, arr) {
var res = {};
for (var i = 0, len = arr.length; i < len; i++) {
var prop = arr[i];
if (prop in obj$$1) {
res[prop] = obj$$1[prop];
}
}
return res;
}
// Most browsers throttle concurrent requests at 6, so it's silly
// to shim _bulk_get by trying to launch potentially hundreds of requests
// and then letting the majority time out. We can handle this ourselves.
var MAX_NUM_CONCURRENT_REQUESTS = 6;
function identityFunction(x) {
return x;
}
function formatResultForOpenRevsGet(result) {
return [{
ok: result
}];
}
// shim for P/CouchDB adapters that don't directly implement _bulk_get
function bulkGet(db, opts, callback) {
var requests = opts.docs;
// consolidate into one request per doc if possible
var requestsById = new ExportedMap();
requests.forEach(function (request) {
if (requestsById.has(request.id)) {
requestsById.get(request.id).push(request);
} else {
requestsById.set(request.id, [request]);
}
});
var numDocs = requestsById.size;
var numDone = 0;
var perDocResults = new Array(numDocs);
function collapseResultsAndFinish() {
var results = [];
perDocResults.forEach(function (res) {
res.docs.forEach(function (info) {
results.push({
id: res.id,
docs: [info]
});
});
});
callback(null, {results: results});
}
function checkDone() {
if (++numDone === numDocs) {
collapseResultsAndFinish();
}
}
function gotResult(docIndex, id, docs) {
perDocResults[docIndex] = {id: id, docs: docs};
checkDone();
}
var allRequests = [];
requestsById.forEach(function (value, key) {
allRequests.push(key);
});
var i = 0;
function nextBatch() {
if (i >= allRequests.length) {
return;
}
var upTo = Math.min(i + MAX_NUM_CONCURRENT_REQUESTS, allRequests.length);
var batch = allRequests.slice(i, upTo);
processBatch(batch, i);
i += batch.length;
}
function processBatch(batch, offset) {
batch.forEach(function (docId, j) {
var docIdx = offset + j;
var docRequests = requestsById.get(docId);
// just use the first request as the "template"
// TODO: The _bulk_get API allows for more subtle use cases than this,
// but for now it is unlikely that there will be a mix of different
// "atts_since" or "attachments" in the same request, since it's just
// replicate.js that is using this for the moment.
// Also, atts_since is aspirational, since we don't support it yet.
var docOpts = pick(docRequests[0], ['atts_since', 'attachments']);
docOpts.open_revs = docRequests.map(function (request) {
// rev is optional, open_revs disallowed
return request.rev;
});
// remove falsey / undefined revisions
docOpts.open_revs = docOpts.open_revs.filter(identityFunction);
var formatResult = identityFunction;
if (docOpts.open_revs.length === 0) {
delete docOpts.open_revs;
// when fetching only the "winning" leaf,
// transform the result so it looks like an open_revs
// request
formatResult = formatResultForOpenRevsGet;
}
// globally-supplied options
['revs', 'attachments', 'binary', 'ajax', 'latest'].forEach(function (param) {
if (param in opts) {
docOpts[param] = opts[param];
}
});
db.get(docId, docOpts, function (err, res) {
var result;
/* istanbul ignore if */
if (err) {
result = [{error: err}];
} else {
result = formatResult(res);
}
gotResult(docIdx, docId, result);
nextBatch();
});
});
}
nextBatch();
}
// in Node of course this is false
function isChromeApp() {
return false;
}
// in Node of course this is false
function hasLocalStorage() {
return false;
}
function nextTick(fn) {
process.nextTick(fn);
}
inherits(Changes, events.EventEmitter);
/* istanbul ignore next */
function attachBrowserEvents(self) {
if (isChromeApp()) {
chrome.storage.onChanged.addListener(function (e) {
// make sure it's event addressed to us
if (e.db_name != null) {
//object only has oldValue, newValue members
self.emit(e.dbName.newValue);
}
});
} else if (hasLocalStorage()) {
if (typeof addEventListener !== 'undefined') {
addEventListener("storage", function (e) {
self.emit(e.key);
});
} else { // old IE
window.attachEvent("storage", function (e) {
self.emit(e.key);
});
}
}
}
function Changes() {
events.EventEmitter.call(this);
this._listeners = {};
attachBrowserEvents(this);
}
Changes.prototype.addListener = function (dbName, id, db, opts) {
/* istanbul ignore if */
if (this._listeners[id]) {
return;
}
var self = this;
var inprogress = false;
function eventFunction() {
/* istanbul ignore if */
if (!self._listeners[id]) {
return;
}
if (inprogress) {
inprogress = 'waiting';
return;
}
inprogress = true;
var changesOpts = pick(opts, [
'style', 'include_docs', 'attachments', 'conflicts', 'filter',
'doc_ids', 'view', 'since', 'query_params', 'binary'
]);
/* istanbul ignore next */
function onError() {
inprogress = false;
}
db.changes(changesOpts).on('change', function (c) {
if (c.seq > opts.since && !opts.cancelled) {
opts.since = c.seq;
opts.onChange(c);
}
}).on('complete', function () {
if (inprogress === 'waiting') {
nextTick(eventFunction);
}
inprogress = false;
}).on('error', onError);
}
this._listeners[id] = eventFunction;
this.on(dbName, eventFunction);
};
Changes.prototype.removeListener = function (dbName, id) {
/* istanbul ignore if */
if (!(id in this._listeners)) {
return;
}
events.EventEmitter.prototype.removeListener.call(this, dbName,
this._listeners[id]);
delete this._listeners[id];
};
/* istanbul ignore next */
Changes.prototype.notifyLocalWindows = function (dbName) {
//do a useless change on a storage thing
//in order to get other windows's listeners to activate
if (isChromeApp()) {
chrome.storage.local.set({dbName: dbName});
} else if (hasLocalStorage()) {
localStorage[dbName] = (localStorage[dbName] === "a") ? "b" : "a";
}
};
Changes.prototype.notify = function (dbName) {
this.emit(dbName);
this.notifyLocalWindows(dbName);
};
function guardedConsole(method) {
/* istanbul ignore else */
if (console !== 'undefined' && method in console) {
var args = Array.prototype.slice.call(arguments, 1);
console[method].apply(console, args);
}
}
function randomNumber(min, max) {
var maxTimeout = 600000; // Hard-coded default of 10 minutes
min = parseInt(min, 10) || 0;
max = parseInt(max, 10);
if (max !== max || max <= min) {
max = (min || 1) << 1; //doubling
} else {
max = max + 1;
}
// In order to not exceed maxTimeout, pick a random value between half of maxTimeout and maxTimeout
if (max > maxTimeout) {
min = maxTimeout >> 1; // divide by two
max = maxTimeout;
}
var ratio = Math.random();
var range = max - min;
return ~~(range * ratio + min); // ~~ coerces to an int, but fast.
}
function defaultBackOff(min) {
var max = 0;
if (!min) {
max = 2000;
}
return randomNumber(min, max);
}
// We assume Node users don't need to see this warning
var res = function () {};
var assign;
{
if (typeof Object.assign === 'function') {
assign = Object.assign;
} else {
// lite Object.assign polyfill based on
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
assign = function (target) {
var to = Object(target);
for (var index = 1; index < arguments.length; index++) {
var nextSource = arguments[index];
if (nextSource != null) { // Skip over if undefined or null
for (var nextKey in nextSource) {
// Avoid bugs when hasOwnProperty is shadowed
if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
to[nextKey] = nextSource[nextKey];
}
}
}
}
return to;
};
}
}
var $inject_Object_assign = assign;
inherits(PouchError, Error);
function PouchError(status, error, reason) {
Error.call(this, reason);
this.status = status;
this.name = error;
this.message = reason;
this.error = true;
}
PouchError.prototype.toString = function () {
return JSON.stringify({
status: this.status,
name: this.name,
message: this.message,
reason: this.reason
});
};
var UNAUTHORIZED = new PouchError(401, 'unauthorized', "Name or password is incorrect.");
var MISSING_BULK_DOCS = new PouchError(400, 'bad_request', "Missing JSON list of 'docs'");
var MISSING_DOC = new PouchError(404, 'not_found', 'missing');
var REV_CONFLICT = new PouchError(409, 'conflict', 'Document update conflict');
var INVALID_ID = new PouchError(400, 'bad_request', '_id field must contain a string');
var MISSING_ID = new PouchError(412, 'missing_id', '_id is required for puts');
var RESERVED_ID = new PouchError(400, 'bad_request', 'Only reserved document ids may start with underscore.');
var NOT_OPEN = new PouchError(412, 'precondition_failed', 'Database not open');
var UNKNOWN_ERROR = new PouchError(500, 'unknown_error', 'Database encountered an unknown error');
var BAD_ARG = new PouchError(500, 'badarg', 'Some query argument is invalid');
var INVALID_REQUEST = new PouchError(400, 'invalid_request', 'Request was invalid');
var QUERY_PARSE_ERROR = new PouchError(400, 'query_parse_error', 'Some query parameter is invalid');
var DOC_VALIDATION = new PouchError(500, 'doc_validation', 'Bad special document member');
var BAD_REQUEST = new PouchError(400, 'bad_request', 'Something wrong with the request');
var NOT_AN_OBJECT = new PouchError(400, 'bad_request', 'Document must be a JSON object');
var DB_MISSING = new PouchError(404, 'not_found', 'Database not found');
var IDB_ERROR = new PouchError(500, 'indexed_db_went_bad', 'unknown');
var WSQ_ERROR = new PouchError(500, 'web_sql_went_bad', 'unknown');
var LDB_ERROR = new PouchError(500, 'levelDB_went_went_bad', 'unknown');
var FORBIDDEN = new PouchError(403, 'forbidden', 'Forbidden by design doc validate_doc_update function');
var INVALID_REV = new PouchError(400, 'bad_request', 'Invalid rev format');
var FILE_EXISTS = new PouchError(412, 'file_exists', 'The database could not be created, the file already exists.');
var MISSING_STUB = new PouchError(412, 'missing_stub', 'A pre-existing attachment stub wasn\'t found');
var INVALID_URL = new PouchError(413, 'invalid_url', 'Provided URL is invalid');
function createError(error, reason) {
function CustomPouchError(reason) {
// inherit error properties from our parent error manually
// so as to allow proper JSON parsing.
/* jshint ignore:start */
for (var p in error) {
if (typeof error[p] !== 'function') {
this[p] = error[p];
}
}
/* jshint ignore:end */
if (reason !== undefined) {
this.reason = reason;
}
}
CustomPouchError.prototype = PouchError.prototype;
return new CustomPouchError(reason);
}
function generateErrorFromResponse(err) {
if (typeof err !== 'object') {
var data = err;
err = UNKNOWN_ERROR;
err.data = data;
}
if ('error' in err && err.error === 'conflict') {
err.name = 'conflict';
err.status = 409;
}
if (!('name' in err)) {
err.name = err.error || 'unknown';
}
if (!('status' in err)) {
err.status = 500;
}
if (!('message' in err)) {
err.message = err.message || err.reason;
}
return err;
}
function tryFilter(filter, doc, req) {
try {
return !filter(doc, req);
} catch (err) {
var msg = 'Filter function threw: ' + err.toString();
return createError(BAD_REQUEST, msg);
}
}
function filterChange(opts) {
var req = {};
var hasFilter = opts.filter && typeof opts.filter === 'function';
req.query = opts.query_params;
return function filter(change) {
if (!change.doc) {
// CSG sends events on the changes feed that don't have documents,
// this hack makes a whole lot of existing code robust.
change.doc = {};
}
var filterReturn = hasFilter && tryFilter(opts.filter, change.doc, req);
if (typeof filterReturn === 'object') {
return filterReturn;
}
if (filterReturn) {
return false;
}
if (!opts.include_docs) {
delete change.doc;
} else if (!opts.attachments) {
for (var att in change.doc._attachments) {
/* istanbul ignore else */
if (change.doc._attachments.hasOwnProperty(att)) {
change.doc._attachments[att].stub = true;
}
}
}
return true;
};
}
function flatten(arrs) {
var res = [];
for (var i = 0, len = arrs.length; i < len; i++) {
res = res.concat(arrs[i]);
}
return res;
}
// shim for Function.prototype.name,
// for browsers that don't support it like IE
/* istanbul ignore next */
function f() {}
var hasName = f.name;
var res$1;
// We dont run coverage in IE
/* istanbul ignore else */
if (hasName) {
res$1 = function (fun) {
return fun.name;
};
} else {
res$1 = function (fun) {
return fun.toString().match(/^\s*function\s*(\S*)\s*\(/)[1];
};
}
var functionName = res$1;
// Determine id an ID is valid
// - invalid IDs begin with an underescore that does not begin '_design' or
// '_local'
// - any other string value is a valid id
// Returns the specific error object for each case
function invalidIdError(id) {
var err;
if (!id) {
err = createError(MISSING_ID);
} else if (typeof id !== 'string') {
err = createError(INVALID_ID);
} else if (/^_/.test(id) && !(/^_(design|local)/).test(id)) {
err = createError(RESERVED_ID);
}
if (err) {
throw err;
}
}
// Checks if a PouchDB object is "remote" or not. This is
// designed to opt-in to certain optimizations, such as
// avoiding checks for "dependentDbs" and other things that
// we know only apply to local databases. In general, "remote"
// should be true for the http adapter, and for third-party
// adapters with similar expensive boundaries to cross for
// every API call, such as socket-pouch and worker-pouch.
// Previously, this was handled via db.type() === 'http'
// which is now deprecated.
function isRemote(db) {
if (typeof db._remote === 'boolean') {
return db._remote;
}
/* istanbul ignore next */
if (typeof db.type === 'function') {
guardedConsole('warn',
'db.type() is deprecated and will be removed in ' +
'a future version of PouchDB');
return db.type() === 'http';
}
/* istanbul ignore next */
return false;
}
function listenerCount(ee, type) {
return 'listenerCount' in ee ? ee.listenerCount(type) :
events.EventEmitter.listenerCount(ee, type);
}
function parseDesignDocFunctionName(s) {
if (!s) {
return null;
}
var parts = s.split('/');
if (parts.length === 2) {
return parts;
}
if (parts.length === 1) {
return [s, s];
}
return null;
}
function normalizeDesignDocFunctionName(s) {
var normalized = parseDesignDocFunctionName(s);
return normalized ? normalized.join('/') : null;
}
// originally parseUri 1.2.2, now patched by us
// (c) Steven Levithan
// MIT License
var keys = ["source", "protocol", "authority", "userInfo", "user", "password",
"host", "port", "relative", "path", "directory", "file", "query", "anchor"];
var qName ="queryKey";
var qParser = /(?:^|&)([^&=]*)=?([^&]*)/g;
// use the "loose" parser
/* eslint maxlen: 0, no-useless-escape: 0 */
var parser = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
function parseUri(str) {
var m = parser.exec(str);
var uri = {};
var i = 14;
while (i--) {
var key = keys[i];
var value = m[i] || "";
var encoded = ['user', 'password'].indexOf(key) !== -1;
uri[key] = encoded ? decodeURIComponent(value) : value;
}
uri[qName] = {};
uri[keys[12]].replace(qParser, function ($0, $1, $2) {
if ($1) {
uri[qName][$1] = $2;
}
});
return uri;
}
// Based on https://github.com/alexdavid/scope-eval v0.0.3
// (source: https://unpkg.com/[email protected]/scope_eval.js)
// This is basically just a wrapper around new Function()
// this is essentially the "update sugar" function from daleharvey/pouchdb#1388
// the diffFun tells us what delta to apply to the doc. it either returns
// the doc, or false if it doesn't need to do an update after all
function upsert(db, docId, diffFun) {
return new PouchPromise$1(function (fulfill, reject) {
db.get(docId, function (err, doc) {
if (err) {
/* istanbul ignore next */
if (err.status !== 404) {
return reject(err);
}
doc = {};
}
// the user might change the _rev, so save it for posterity
var docRev = doc._rev;
var newDoc = diffFun(doc);
if (!newDoc) {
// if the diffFun returns falsy, we short-circuit as
// an optimization
return fulfill({updated: false, rev: docRev});
}
// users aren't allowed to modify these values,
// so reset them here
newDoc._id = docId;
newDoc._rev = docRev;
fulfill(tryAndPut(db, newDoc, diffFun));
});
});
}
function tryAndPut(db, doc, diffFun) {
return db.put(doc).then(function (res) {
return {
updated: true,
rev: res.rev
};
}, function (err) {
/* istanbul ignore next */
if (err.status !== 409) {
throw err;
}
return upsert(db, doc._id, diffFun);
});
}
function rev() {
return uuidV4.v4().replace(/-/g, '').toLowerCase();
}
var uuid = uuidV4.v4;
// We fetch all leafs of the revision tree, and sort them based on tree length
// and whether they were deleted, undeleted documents with the longest revision
// tree (most edits) win
// The final sort algorithm is slightly documented in a sidebar here:
// http://guide.couchdb.org/draft/conflicts.html
function winningRev(metadata) {
var winningId;
var winningPos;
var winningDeleted;
var toVisit = metadata.rev_tree.slice();
var node;
while ((node = toVisit.pop())) {
var tree = node.ids;
var branches = tree[2];
var pos = node.pos;
if (branches.length) { // non-leaf
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i]});
}
continue;
}
var deleted = !!tree[1].deleted;
var id = tree[0];
// sort by deleted, then pos, then id
if (!winningId || (winningDeleted !== deleted ? winningDeleted :
winningPos !== pos ? winningPos < pos : winningId < id)) {
winningId = id;
winningPos = pos;
winningDeleted = deleted;
}
}
return winningPos + '-' + winningId;
}
// Pretty much all below can be combined into a higher order function to
// traverse revisions
// The return value from the callback will be passed as context to all
// children of that node
function traverseRevTree(revs, callback) {
var toVisit = revs.slice();
var node;
while ((node = toVisit.pop())) {
var pos = node.pos;
var tree = node.ids;
var branches = tree[2];
var newCtx =
callback(branches.length === 0, pos, tree[0], node.ctx, tree[1]);
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i], ctx: newCtx});
}
}
}
function sortByPos(a, b) {
return a.pos - b.pos;
}
function collectLeaves(revs) {
var leaves = [];
traverseRevTree(revs, function (isLeaf, pos, id, acc, opts) {
if (isLeaf) {
leaves.push({rev: pos + "-" + id, pos: pos, opts: opts});
}
});
leaves.sort(sortByPos).reverse();
for (var i = 0, len = leaves.length; i < len; i++) {
delete leaves[i].pos;
}
return leaves;
}
// returns revs of all conflicts that is leaves such that
// 1. are not deleted and
// 2. are different than winning revision
function collectConflicts(metadata) {
var win = winningRev(metadata);
var leaves = collectLeaves(metadata.rev_tree);
var conflicts = [];
for (var i = 0, len = leaves.length; i < len; i++) {
var leaf = leaves[i];
if (leaf.rev !== win && !leaf.opts.deleted) {
conflicts.push(leaf.rev);
}
}
return conflicts;
}
// compact a tree by marking its non-leafs as missing,
// and return a list of revs to delete
function compactTree(metadata) {
var revs = [];
traverseRevTree(metadata.rev_tree, function (isLeaf, pos,
revHash, ctx, opts) {
if (opts.status === 'available' && !isLeaf) {
revs.push(pos + '-' + revHash);
opts.status = 'missing';
}
});
return revs;
}
// build up a list of all the paths to the leafs in this revision tree
function rootToLeaf(revs) {
var paths = [];
var toVisit = revs.slice();
var node;
while ((node = toVisit.pop())) {
var pos = node.pos;
var tree = node.ids;
var id = tree[0];
var opts = tree[1];
var branches = tree[2];
var isLeaf = branches.length === 0;
var history = node.history ? node.history.slice() : [];
history.push({id: id, opts: opts});
if (isLeaf) {
paths.push({pos: (pos + 1 - history.length), ids: history});
}
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i], history: history});
}
}
return paths.reverse();
}
// for a better overview of what this is doing, read:
// https://github.com/apache/couchdb-couch/blob/master/src/couch_key_tree.erl
//
// But for a quick intro, CouchDB uses a revision tree to store a documents
// history, A -> B -> C, when a document has conflicts, that is a branch in the
// tree, A -> (B1 | B2 -> C), We store these as a nested array in the format
//
// KeyTree = [Path ... ]
// Path = {pos: position_from_root, ids: Tree}
// Tree = [Key, Opts, [Tree, ...]], in particular single node: [Key, []]
function sortByPos$1(a, b) {
return a.pos - b.pos;
}
// classic binary search
function binarySearch(arr, item, comparator) {
var low = 0;
var high = arr.length;
var mid;
while (low < high) {
mid = (low + high) >>> 1;
if (comparator(arr[mid], item) < 0) {
low = mid + 1;
} else {
high = mid;
}
}
return low;
}
// assuming the arr is sorted, insert the item in the proper place
function insertSorted(arr, item, comparator) {
var idx = binarySearch(arr, item, comparator);
arr.splice(idx, 0, item);
}
// Turn a path as a flat array into a tree with a single branch.
// If any should be stemmed from the beginning of the array, that's passed
// in as the second argument
function pathToTree(path$$1, numStemmed) {
var root;
var leaf;
for (var i = numStemmed, len = path$$1.length; i < len; i++) {
var node = path$$1[i];
var currentLeaf = [node.id, node.opts, []];
if (leaf) {
leaf[2].push(currentLeaf);
leaf = currentLeaf;
} else {
root = leaf = currentLeaf;
}
}
return root;
}
// compare the IDs of two trees
function compareTree(a, b) {
return a[0] < b[0] ? -1 : 1;
}
// Merge two trees together
// The roots of tree1 and tree2 must be the same revision
function mergeTree(in_tree1, in_tree2) {
var queue = [{tree1: in_tree1, tree2: in_tree2}];
var conflicts = false;
while (queue.length > 0) {
var item = queue.pop();
var tree1 = item.tree1;
var tree2 = item.tree2;
if (tree1[1].status || tree2[1].status) {
tree1[1].status =
(tree1[1].status === 'available' ||
tree2[1].status === 'available') ? 'available' : 'missing';
}
for (var i = 0; i < tree2[2].length; i++) {
if (!tree1[2][0]) {
conflicts = 'new_leaf';
tree1[2][0] = tree2[2][i];
continue;
}
var merged = false;
for (var j = 0; j < tree1[2].length; j++) {
if (tree1[2][j][0] === tree2[2][i][0]) {
queue.push({tree1: tree1[2][j], tree2: tree2[2][i]});
merged = true;
}
}
if (!merged) {
conflicts = 'new_branch';
insertSorted(tree1[2], tree2[2][i], compareTree);
}
}
}
return {conflicts: conflicts, tree: in_tree1};
}
function doMerge(tree, path$$1, dontExpand) {
var restree = [];
var conflicts = false;
var merged = false;
var res;
if (!tree.length) {
return {tree: [path$$1], conflicts: 'new_leaf'};
}
for (var i = 0, len = tree.length; i < len; i++) {
var branch = tree[i];
if (branch.pos === path$$1.pos && branch.ids[0] === path$$1.ids[0]) {
// Paths start at the same position and have the same root, so they need
// merged
res = mergeTree(branch.ids, path$$1.ids);
restree.push({pos: branch.pos, ids: res.tree});
conflicts = conflicts || res.conflicts;
merged = true;
} else if (dontExpand !== true) {
// The paths start at a different position, take the earliest path and
// traverse up until it as at the same point from root as the path we
// want to merge. If the keys match we return the longer path with the
// other merged After stemming we dont want to expand the trees
var t1 = branch.pos < path$$1.pos ? branch : path$$1;
var t2 = branch.pos < path$$1.pos ? path$$1 : branch;
var diff = t2.pos - t1.pos;
var candidateParents = [];
var trees = [];
trees.push({ids: t1.ids, diff: diff, parent: null, parentIdx: null});
while (trees.length > 0) {
var item = trees.pop();
if (item.diff === 0) {
if (item.ids[0] === t2.ids[0]) {
candidateParents.push(item);
}
continue;
}
var elements = item.ids[2];
for (var j = 0, elementsLen = elements.length; j < elementsLen; j++) {
trees.push({
ids: elements[j],
diff: item.diff - 1,
parent: item.ids,
parentIdx: j
});
}
}
var el = candidateParents[0];
if (!el) {
restree.push(branch);
} else {
res = mergeTree(el.ids, t2.ids);
el.parent[2][el.parentIdx] = res.tree;
restree.push({pos: t1.pos, ids: t1.ids});
conflicts = conflicts || res.conflicts;
merged = true;
}
} else {
restree.push(branch);
}
}
// We didnt find
if (!merged) {
restree.push(path$$1);
}
restree.sort(sortByPos$1);
return {
tree: restree,
conflicts: conflicts || 'internal_node'
};
}
// To ensure we dont grow the revision tree infinitely, we stem old revisions
function stem(tree, depth) {
// First we break out the tree into a complete list of root to leaf paths
var paths = rootToLeaf(tree);
var stemmedRevs;
var result;
for (var i = 0, len = paths.length; i < len; i++) {
// Then for each path, we cut off the start of the path based on the
// `depth` to stem to, and generate a new set of flat trees
var path$$1 = paths[i];
var stemmed = path$$1.ids;
var node;
if (stemmed.length > depth) {
// only do the stemming work if we actually need to stem
if (!stemmedRevs) {
stemmedRevs = {}; // avoid allocating this object unnecessarily
}
var numStemmed = stemmed.length - depth;
node = {
pos: path$$1.pos + numStemmed,
ids: pathToTree(stemmed, numStemmed)
};
for (var s = 0; s < numStemmed; s++) {
var rev = (path$$1.pos + s) + '-' + stemmed[s].id;
stemmedRevs[rev] = true;
}
} else { // no need to actually stem
node = {
pos: path$$1.pos,
ids: pathToTree(stemmed, 0)
};
}
// Then we remerge all those flat trees together, ensuring that we dont
// connect trees that would go beyond the depth limit
if (result) {
result = doMerge(result, node, true).tree;
} else {
result = [node];
}
}
// this is memory-heavy per Chrome profiler, avoid unless we actually stemmed
if (stemmedRevs) {
traverseRevTree(result, function (isLeaf, pos, revHash) {
// some revisions may have been removed in a branch but not in another
delete stemmedRevs[pos + '-' + revHash];
});
}
return {
tree: result,
revs: stemmedRevs ? Object.keys(stemmedRevs) : []
};
}
function merge(tree, path$$1, depth) {
var newTree = doMerge(tree, path$$1);
var stemmed = stem(newTree.tree, depth);
return {
tree: stemmed.tree,
stemmedRevs: stemmed.revs,
conflicts: newTree.conflicts
};
}
// return true if a rev exists in the rev tree, false otherwise
function revExists(revs, rev) {
var toVisit = revs.slice();
var splitRev = rev.split('-');
var targetPos = parseInt(splitRev[0], 10);
var targetId = splitRev[1];
var node;
while ((node = toVisit.pop())) {
if (node.pos === targetPos && node.ids[0] === targetId) {
return true;
}
var branches = node.ids[2];
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: node.pos + 1, ids: branches[i]});
}
}
return false;
}
function getTrees(node) {
return node.ids;
}
// check if a specific revision of a doc has been deleted
// - metadata: the metadata object from the doc store
// - rev: (optional) the revision to check. defaults to winning revision
function isDeleted(metadata, rev) {
if (!rev) {
rev = winningRev(metadata);
}
var id = rev.substring(rev.indexOf('-') + 1);
var toVisit = metadata.rev_tree.map(getTrees);
var tree;
while ((tree = toVisit.pop())) {
if (tree[0] === id) {
return !!tree[1].deleted;
}
toVisit = toVisit.concat(tree[2]);
}
}
function isLocalId(id) {
return (/^_local/).test(id);
}
// returns the current leaf node for a given revision
function latest(rev, metadata) {
var toVisit = metadata.rev_tree.slice();
var node;
while ((node = toVisit.pop())) {
var pos = node.pos;
var tree = node.ids;
var id = tree[0];
var opts = tree[1];
var branches = tree[2];
var isLeaf = branches.length === 0;
var history = node.history ? node.history.slice() : [];
history.push({id: id, pos: pos, opts: opts});
if (isLeaf) {
for (var i = 0, len = history.length; i < len; i++) {
var historyNode = history[i];
var historyRev = historyNode.pos + '-' + historyNode.id;
if (historyRev === rev) {
// return the rev of this leaf
return pos + '-' + id;
}
}
}
for (var j = 0, l = branches.length; j < l; j++) {
toVisit.push({pos: pos + 1, ids: branches[j], history: history});
}
}
/* istanbul ignore next */
throw new Error('Unable to resolve latest revision for id ' + metadata.id + ', rev ' + rev);
}
inherits(Changes$2, events.EventEmitter);
function tryCatchInChangeListener(self, change) {
// isolate try/catches to avoid V8 deoptimizations
try {
self.emit('change', change);
} catch (e) {
guardedConsole('error', 'Error in .on("change", function):', e);
}
}
function Changes$2(db, opts, callback) {
events.EventEmitter.call(this);
var self = this;
this.db = db;
opts = opts ? clone(opts) : {};
var complete = opts.complete = once(function (err, resp) {
if (err) {
if (listenerCount(self, 'error') > 0) {
self.emit('error', err);
}
} else {
self.emit('complete', resp);
}
self.removeAllListeners();
db.removeListener('destroyed', onDestroy);
});
if (callback) {
self.on('complete', function (resp) {
callback(null, resp);
});
self.on('error', callback);
}
function onDestroy() {
self.cancel();
}
db.once('destroyed', onDestroy);
opts.onChange = function (change) {
/* istanbul ignore if */
if (self.isCancelled) {
return;
}
tryCatchInChangeListener(self, change);
};
var promise = new PouchPromise$1(function (fulfill, reject) {
opts.complete = function (err, res$$1) {
if (err) {
reject(err);
} else {
fulfill(res$$1);
}
};
});
self.once('cancel', function () {
db.removeListener('destroyed', onDestroy);
opts.complete(null, {status: 'cancelled'});
});
this.then = promise.then.bind(promise);
this['catch'] = promise['catch'].bind(promise);
this.then(function (result) {
complete(null, result);
}, complete);
if (!db.taskqueue.isReady) {
db.taskqueue.addTask(function (failed) {
if (failed) {
opts.complete(failed);
} else if (self.isCancelled) {
self.emit('cancel');
} else {
self.validateChanges(opts);
}
});
} else {
self.validateChanges(opts);
}
}
Changes$2.prototype.cancel = function () {
this.isCancelled = true;
if (this.db.taskqueue.isReady) {
this.emit('cancel');
}
};
function processChange(doc, metadata, opts) {
var changeList = [{rev: doc._rev}];
if (opts.style === 'all_docs') {
changeList = collectLeaves(metadata.rev_tree)
.map(function (x) { return {rev: x.rev}; });
}
var change = {
id: metadata.id,
changes: changeList,
doc: doc
};
if (isDeleted(metadata, doc._rev)) {
change.deleted = true;
}
if (opts.conflicts) {
change.doc._conflicts = collectConflicts(metadata);
if (!change.doc._conflicts.length) {
delete change.doc._conflicts;
}
}
return change;
}
Changes$2.prototype.validateChanges = function (opts) {
var callback = opts.complete;
var self = this;
/* istanbul ignore else */
if (PouchDB$5._changesFilterPlugin) {
PouchDB$5._changesFilterPlugin.validate(opts, function (err) {
if (err) {
return callback(err);
}
self.doChanges(opts);
});
} else {
self.doChanges(opts);
}
};
Changes$2.prototype.doChanges = function (opts) {
var self = this;
var callback = opts.complete;
opts = clone(opts);
if ('live' in opts && !('continuous' in opts)) {
opts.continuous = opts.live;
}
opts.processChange = processChange;
if (opts.since === 'latest') {
opts.since = 'now';
}
if (!opts.since) {
opts.since = 0;
}
if (opts.since === 'now') {
this.db.info().then(function (info) {
/* istanbul ignore if */
if (self.isCancelled) {
callback(null, {status: 'cancelled'});
return;
}
opts.since = info.update_seq;
self.doChanges(opts);
}, callback);
return;
}
/* istanbul ignore else */
if (PouchDB$5._changesFilterPlugin) {
PouchDB$5._changesFilterPlugin.normalize(opts);
if (PouchDB$5._changesFilterPlugin.shouldFilter(this, opts)) {
return PouchDB$5._changesFilterPlugin.filter(this, opts);
}
} else {
['doc_ids', 'filter', 'selector', 'view'].forEach(function (key) {
if (key in opts) {
guardedConsole('warn',
'The "' + key + '" option was passed in to changes/replicate, ' +
'but pouchdb-changes-filter plugin is not installed, so it ' +
'was ignored. Please install the plugin to enable filtering.'
);
}
});
}
if (!('descending' in opts)) {
opts.descending = false;
}
// 0 and 1 should return 1 document
opts.limit = opts.limit === 0 ? 1 : opts.limit;
opts.complete = callback;
var newPromise = this.db._changes(opts);
/* istanbul ignore else */
if (newPromise && typeof newPromise.cancel === 'function') {
var cancel = self.cancel;
self.cancel = getArguments(function (args) {
newPromise.cancel();
cancel.apply(this, args);
});
}
};
/*
* A generic pouch adapter
*/
function compare(left, right) {
return left < right ? -1 : left > right ? 1 : 0;
}
// Wrapper for functions that call the bulkdocs api with a single doc,
// if the first result is an error, return an error
function yankError(callback, docId) {
return function (err, results) {
if (err || (results[0] && results[0].error)) {
err = err || results[0];
err.docId = docId;
callback(err);
} else {
callback(null, results.length ? results[0] : results);
}
};
}
// clean docs given to us by the user
function cleanDocs(docs) {
for (var i = 0; i < docs.length; i++) {
var doc = docs[i];
if (doc._deleted) {
delete doc._attachments; // ignore atts for deleted docs
} else if (doc._attachments) {
// filter out extraneous keys from _attachments
var atts = Object.keys(doc._attachments);
for (var j = 0; j < atts.length; j++) {
var att = atts[j];
doc._attachments[att] = pick(doc._attachments[att],
['data', 'digest', 'content_type', 'length', 'revpos', 'stub']);
}
}
}
}
// compare two docs, first by _id then by _rev
function compareByIdThenRev(a, b) {
var idCompare = compare(a._id, b._id);
if (idCompare !== 0) {
return idCompare;
}
var aStart = a._revisions ? a._revisions.start : 0;
var bStart = b._revisions ? b._revisions.start : 0;
return compare(aStart, bStart);
}
// for every node in a revision tree computes its distance from the closest
// leaf
function computeHeight(revs) {
var height = {};
var edges = [];
traverseRevTree(revs, function (isLeaf, pos, id, prnt) {
var rev$$1 = pos + "-" + id;
if (isLeaf) {
height[rev$$1] = 0;
}
if (prnt !== undefined) {
edges.push({from: prnt, to: rev$$1});
}
return rev$$1;
});
edges.reverse();
edges.forEach(function (edge) {
if (height[edge.from] === undefined) {
height[edge.from] = 1 + height[edge.to];
} else {
height[edge.from] = Math.min(height[edge.from], 1 + height[edge.to]);
}
});
return height;
}
function allDocsKeysQuery(api, opts, callback) {
var keys = ('limit' in opts) ?
opts.keys.slice(opts.skip, opts.limit + opts.skip) :
(opts.skip > 0) ? opts.keys.slice(opts.skip) : opts.keys;
if (opts.descending) {
keys.reverse();
}
if (!keys.length) {
return api._allDocs({limit: 0}, callback);
}
var finalResults = {
offset: opts.skip
};
return PouchPromise$1.all(keys.map(function (key) {
var subOpts = $inject_Object_assign({key: key, deleted: 'ok'}, opts);
['limit', 'skip', 'keys'].forEach(function (optKey) {
delete subOpts[optKey];
});
return new PouchPromise$1(function (resolve, reject) {
api._allDocs(subOpts, function (err, res$$1) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
finalResults.total_rows = res$$1.total_rows;
resolve(res$$1.rows[0] || {key: key, error: 'not_found'});
});
});
})).then(function (results) {
finalResults.rows = results;
return finalResults;
});
}
// all compaction is done in a queue, to avoid attaching
// too many listeners at once
function doNextCompaction(self) {
var task = self._compactionQueue[0];
var opts = task.opts;
var callback = task.callback;
self.get('_local/compaction').catch(function () {
return false;
}).then(function (doc) {
if (doc && doc.last_seq) {
opts.last_seq = doc.last_seq;
}
self._compact(opts, function (err, res$$1) {
/* istanbul ignore if */
if (err) {
callback(err);
} else {
callback(null, res$$1);
}
nextTick(function () {
self._compactionQueue.shift();
if (self._compactionQueue.length) {
doNextCompaction(self);
}
});
});
});
}
function attachmentNameError(name) {
if (name.charAt(0) === '_') {
return name + ' is not a valid attachment name, attachment ' +
'names cannot start with \'_\'';
}
return false;
}
inherits(AbstractPouchDB, events.EventEmitter);
function AbstractPouchDB() {
events.EventEmitter.call(this);
}
AbstractPouchDB.prototype.post =
adapterFun('post', function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof doc !== 'object' || Array.isArray(doc)) {
return callback(createError(NOT_AN_OBJECT));
}
this.bulkDocs({docs: [doc]}, opts, yankError(callback, doc._id));
});
AbstractPouchDB.prototype.put = adapterFun('put', function (doc, opts, cb) {
if (typeof opts === 'function') {
cb = opts;
opts = {};
}
if (typeof doc !== 'object' || Array.isArray(doc)) {
return cb(createError(NOT_AN_OBJECT));
}
invalidIdError(doc._id);
if (isLocalId(doc._id) && typeof this._putLocal === 'function') {
if (doc._deleted) {
return this._removeLocal(doc, cb);
} else {
return this._putLocal(doc, cb);
}
}
var self = this;
if (opts.force && doc._rev) {
transformForceOptionToNewEditsOption();
putDoc(function (err) {
var result = err ? null : {ok: true, id: doc._id, rev: doc._rev};
cb(err, result);
});
} else {
putDoc(cb);
}
function transformForceOptionToNewEditsOption() {
var parts = doc._rev.split('-');
var oldRevId = parts[1];
var oldRevNum = parseInt(parts[0], 10);
var newRevNum = oldRevNum + 1;
var newRevId = rev();
doc._revisions = {
start: newRevNum,
ids: [newRevId, oldRevId]
};
doc._rev = newRevNum + '-' + newRevId;
opts.new_edits = false;
}
function putDoc(next) {
if (typeof self._put === 'function' && opts.new_edits !== false) {
self._put(doc, opts, next);
} else {
self.bulkDocs({docs: [doc]}, opts, yankError(next, doc._id));
}
}
});
AbstractPouchDB.prototype.putAttachment =
adapterFun('putAttachment', function (docId, attachmentId, rev$$1,
blob, type) {
var api = this;
if (typeof type === 'function') {
type = blob;
blob = rev$$1;
rev$$1 = null;
}
// Lets fix in https://github.com/pouchdb/pouchdb/issues/3267
/* istanbul ignore if */
if (typeof type === 'undefined') {
type = blob;
blob = rev$$1;
rev$$1 = null;
}
if (!type) {
guardedConsole('warn', 'Attachment', attachmentId, 'on document', docId, 'is missing content_type');
}
function createAttachment(doc) {
var prevrevpos = '_rev' in doc ? parseInt(doc._rev, 10) : 0;
doc._attachments = doc._attachments || {};
doc._attachments[attachmentId] = {
content_type: type,
data: blob,
revpos: ++prevrevpos
};
return api.put(doc);
}
return api.get(docId).then(function (doc) {
if (doc._rev !== rev$$1) {
throw createError(REV_CONFLICT);
}
return createAttachment(doc);
}, function (err) {
// create new doc
/* istanbul ignore else */
if (err.reason === MISSING_DOC.message) {
return createAttachment({_id: docId});
} else {
throw err;
}
});
});
AbstractPouchDB.prototype.removeAttachment =
adapterFun('removeAttachment', function (docId, attachmentId, rev$$1,
callback) {
var self = this;
self.get(docId, function (err, obj$$1) {
/* istanbul ignore if */
if (err) {
callback(err);
return;
}
if (obj$$1._rev !== rev$$1) {
callback(createError(REV_CONFLICT));
return;
}
/* istanbul ignore if */
if (!obj$$1._attachments) {
return callback();
}
delete obj$$1._attachments[attachmentId];
if (Object.keys(obj$$1._attachments).length === 0) {
delete obj$$1._attachments;
}
self.put(obj$$1, callback);
});
});
AbstractPouchDB.prototype.remove =
adapterFun('remove', function (docOrId, optsOrRev, opts, callback) {
var doc;
if (typeof optsOrRev === 'string') {
// id, rev, opts, callback style
doc = {
_id: docOrId,
_rev: optsOrRev
};
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
} else {
// doc, opts, callback style
doc = docOrId;
if (typeof optsOrRev === 'function') {
callback = optsOrRev;
opts = {};
} else {
callback = opts;
opts = optsOrRev;
}
}
opts = opts || {};
opts.was_delete = true;
var newDoc = {_id: doc._id, _rev: (doc._rev || opts.rev)};
newDoc._deleted = true;
if (isLocalId(newDoc._id) && typeof this._removeLocal === 'function') {
return this._removeLocal(doc, callback);
}
this.bulkDocs({docs: [newDoc]}, opts, yankError(callback, newDoc._id));
});
AbstractPouchDB.prototype.revsDiff =
adapterFun('revsDiff', function (req, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var ids = Object.keys(req);
if (!ids.length) {
return callback(null, {});
}
var count = 0;
var missing = new ExportedMap();
function addToMissing(id, revId) {
if (!missing.has(id)) {
missing.set(id, {missing: []});
}
missing.get(id).missing.push(revId);
}
function processDoc(id, rev_tree) {
// Is this fast enough? Maybe we should switch to a set simulated by a map
var missingForId = req[id].slice(0);
traverseRevTree(rev_tree, function (isLeaf, pos, revHash, ctx,
opts) {
var rev$$1 = pos + '-' + revHash;
var idx = missingForId.indexOf(rev$$1);
if (idx === -1) {
return;
}
missingForId.splice(idx, 1);
/* istanbul ignore if */
if (opts.status !== 'available') {
addToMissing(id, rev$$1);
}
});
// Traversing the tree is synchronous, so now `missingForId` contains
// revisions that were not found in the tree
missingForId.forEach(function (rev$$1) {
addToMissing(id, rev$$1);
});
}
ids.map(function (id) {
this._getRevisionTree(id, function (err, rev_tree) {
if (err && err.status === 404 && err.message === 'missing') {
missing.set(id, {missing: req[id]});
} else if (err) {
/* istanbul ignore next */
return callback(err);
} else {
processDoc(id, rev_tree);
}
if (++count === ids.length) {
// convert LazyMap to object
var missingObj = {};
missing.forEach(function (value, key) {
missingObj[key] = value;
});
return callback(null, missingObj);
}
});
}, this);
});
// _bulk_get API for faster replication, as described in
// https://github.com/apache/couchdb-chttpd/pull/33
// At the "abstract" level, it will just run multiple get()s in
// parallel, because this isn't much of a performance cost
// for local databases (except the cost of multiple transactions, which is
// small). The http adapter overrides this in order
// to do a more efficient single HTTP request.
AbstractPouchDB.prototype.bulkGet =
adapterFun('bulkGet', function (opts, callback) {
bulkGet(this, opts, callback);
});
// compact one document and fire callback
// by compacting we mean removing all revisions which
// are further from the leaf in revision tree than max_height
AbstractPouchDB.prototype.compactDocument =
adapterFun('compactDocument', function (docId, maxHeight, callback) {
var self = this;
this._getRevisionTree(docId, function (err, revTree) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var height = computeHeight(revTree);
var candidates = [];
var revs = [];
Object.keys(height).forEach(function (rev$$1) {
if (height[rev$$1] > maxHeight) {
candidates.push(rev$$1);
}
});
traverseRevTree(revTree, function (isLeaf, pos, revHash, ctx, opts) {
var rev$$1 = pos + '-' + revHash;
if (opts.status === 'available' && candidates.indexOf(rev$$1) !== -1) {
revs.push(rev$$1);
}
});
self._doCompaction(docId, revs, callback);
});
});
// compact the whole database using single document
// compaction
AbstractPouchDB.prototype.compact =
adapterFun('compact', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var self = this;
opts = opts || {};
self._compactionQueue = self._compactionQueue || [];
self._compactionQueue.push({opts: opts, callback: callback});
if (self._compactionQueue.length === 1) {
doNextCompaction(self);
}
});
AbstractPouchDB.prototype._compact = function (opts, callback) {
var self = this;
var changesOpts = {
return_docs: false,
last_seq: opts.last_seq || 0
};
var promises = [];
function onChange(row) {
promises.push(self.compactDocument(row.id, 0));
}
function onComplete(resp) {
var lastSeq = resp.last_seq;
PouchPromise$1.all(promises).then(function () {
return upsert(self, '_local/compaction', function deltaFunc(doc) {
if (!doc.last_seq || doc.last_seq < lastSeq) {
doc.last_seq = lastSeq;
return doc;
}
return false; // somebody else got here first, don't update
});
}).then(function () {
callback(null, {ok: true});
}).catch(callback);
}
self.changes(changesOpts)
.on('change', onChange)
.on('complete', onComplete)
.on('error', callback);
};
/* Begin api wrappers. Specific functionality to storage belongs in the
_[method] */
AbstractPouchDB.prototype.get = adapterFun('get', function (id, opts, cb) {
if (typeof opts === 'function') {
cb = opts;
opts = {};
}
if (typeof id !== 'string') {
return cb(createError(INVALID_ID));
}
if (isLocalId(id) && typeof this._getLocal === 'function') {
return this._getLocal(id, cb);
}
var leaves = [], self = this;
function finishOpenRevs() {
var result = [];
var count = leaves.length;
/* istanbul ignore if */
if (!count) {
return cb(null, result);
}
// order with open_revs is unspecified
leaves.forEach(function (leaf) {
self.get(id, {
rev: leaf,
revs: opts.revs,
latest: opts.latest,
attachments: opts.attachments
}, function (err, doc) {
if (!err) {
// using latest=true can produce duplicates
var existing;
for (var i = 0, l = result.length; i < l; i++) {
if (result[i].ok && result[i].ok._rev === doc._rev) {
existing = true;
break;
}
}
if (!existing) {
result.push({ok: doc});
}
} else {
result.push({missing: leaf});
}
count--;
if (!count) {
cb(null, result);
}
});
});
}
if (opts.open_revs) {
if (opts.open_revs === "all") {
this._getRevisionTree(id, function (err, rev_tree) {
if (err) {
return cb(err);
}
leaves = collectLeaves(rev_tree).map(function (leaf) {
return leaf.rev;
});
finishOpenRevs();
});
} else {
if (Array.isArray(opts.open_revs)) {
leaves = opts.open_revs;
for (var i = 0; i < leaves.length; i++) {
var l = leaves[i];
// looks like it's the only thing couchdb checks
if (!(typeof (l) === "string" && /^\d+-/.test(l))) {
return cb(createError(INVALID_REV));
}
}
finishOpenRevs();
} else {
return cb(createError(UNKNOWN_ERROR, 'function_clause'));
}
}
return; // open_revs does not like other options
}
return this._get(id, opts, function (err, result) {
if (err) {
err.docId = id;
return cb(err);
}
var doc = result.doc;
var metadata = result.metadata;
var ctx = result.ctx;
if (opts.conflicts) {
var conflicts = collectConflicts(metadata);
if (conflicts.length) {
doc._conflicts = conflicts;
}
}
if (isDeleted(metadata, doc._rev)) {
doc._deleted = true;
}
if (opts.revs || opts.revs_info) {
var splittedRev = doc._rev.split('-');
var revNo = parseInt(splittedRev[0], 10);
var revHash = splittedRev[1];
var paths = rootToLeaf(metadata.rev_tree);
var path$$1 = null;
for (var i = 0; i < paths.length; i++) {
var currentPath = paths[i];
var hashIndex = currentPath.ids.map(function (x) { return x.id; })
.indexOf(revHash);
var hashFoundAtRevPos = hashIndex === (revNo - 1);
if (hashFoundAtRevPos || (!path$$1 && hashIndex !== -1)) {
path$$1 = currentPath;
}
}
var indexOfRev = path$$1.ids.map(function (x) { return x.id; })
.indexOf(doc._rev.split('-')[1]) + 1;
var howMany = path$$1.ids.length - indexOfRev;
path$$1.ids.splice(indexOfRev, howMany);
path$$1.ids.reverse();
if (opts.revs) {
doc._revisions = {
start: (path$$1.pos + path$$1.ids.length) - 1,
ids: path$$1.ids.map(function (rev$$1) {
return rev$$1.id;
})
};
}
if (opts.revs_info) {
var pos = path$$1.pos + path$$1.ids.length;
doc._revs_info = path$$1.ids.map(function (rev$$1) {
pos--;
return {
rev: pos + '-' + rev$$1.id,
status: rev$$1.opts.status
};
});
}
}
if (opts.attachments && doc._attachments) {
var attachments = doc._attachments;
var count = Object.keys(attachments).length;
if (count === 0) {
return cb(null, doc);
}
Object.keys(attachments).forEach(function (key) {
this._getAttachment(doc._id, key, attachments[key], {
// Previously the revision handling was done in adapter.js
// getAttachment, however since idb-next doesnt we need to
// pass the rev through
rev: doc._rev,
binary: opts.binary,
ctx: ctx
}, function (err, data) {
var att = doc._attachments[key];
att.data = data;
delete att.stub;
delete att.length;
if (!--count) {
cb(null, doc);
}
});
}, self);
} else {
if (doc._attachments) {
for (var key in doc._attachments) {
/* istanbul ignore else */
if (doc._attachments.hasOwnProperty(key)) {
doc._attachments[key].stub = true;
}
}
}
cb(null, doc);
}
});
});
// TODO: I dont like this, it forces an extra read for every
// attachment read and enforces a confusing api between
// adapter.js and the adapter implementation
AbstractPouchDB.prototype.getAttachment =
adapterFun('getAttachment', function (docId, attachmentId, opts, callback) {
var self = this;
if (opts instanceof Function) {
callback = opts;
opts = {};
}
this._get(docId, opts, function (err, res$$1) {
if (err) {
return callback(err);
}
if (res$$1.doc._attachments && res$$1.doc._attachments[attachmentId]) {
opts.ctx = res$$1.ctx;
opts.binary = true;
self._getAttachment(docId, attachmentId,
res$$1.doc._attachments[attachmentId], opts, callback);
} else {
return callback(createError(MISSING_DOC));
}
});
});
AbstractPouchDB.prototype.allDocs =
adapterFun('allDocs', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts.skip = typeof opts.skip !== 'undefined' ? opts.skip : 0;
if (opts.start_key) {
opts.startkey = opts.start_key;
}
if (opts.end_key) {
opts.endkey = opts.end_key;
}
if ('keys' in opts) {
if (!Array.isArray(opts.keys)) {
return callback(new TypeError('options.keys must be an array'));
}
var incompatibleOpt =
['startkey', 'endkey', 'key'].filter(function (incompatibleOpt) {
return incompatibleOpt in opts;
})[0];
if (incompatibleOpt) {
callback(createError(QUERY_PARSE_ERROR,
'Query parameter `' + incompatibleOpt +
'` is not compatible with multi-get'
));
return;
}
if (!isRemote(this)) {
return allDocsKeysQuery(this, opts, callback);
}
}
return this._allDocs(opts, callback);
});
AbstractPouchDB.prototype.changes = function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
return new Changes$2(this, opts, callback);
};
AbstractPouchDB.prototype.close = adapterFun('close', function (callback) {
this._closed = true;
this.emit('closed');
return this._close(callback);
});
AbstractPouchDB.prototype.info = adapterFun('info', function (callback) {
var self = this;
this._info(function (err, info) {
if (err) {
return callback(err);
}
// assume we know better than the adapter, unless it informs us
info.db_name = info.db_name || self.name;
info.auto_compaction = !!(self.auto_compaction && !isRemote(self));
info.adapter = self.adapter;
callback(null, info);
});
});
AbstractPouchDB.prototype.id = adapterFun('id', function (callback) {
return this._id(callback);
});
/* istanbul ignore next */
AbstractPouchDB.prototype.type = function () {
return (typeof this._type === 'function') ? this._type() : this.adapter;
};
AbstractPouchDB.prototype.bulkDocs =
adapterFun('bulkDocs', function (req, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = opts || {};
if (Array.isArray(req)) {
req = {
docs: req
};
}
if (!req || !req.docs || !Array.isArray(req.docs)) {
return callback(createError(MISSING_BULK_DOCS));
}
for (var i = 0; i < req.docs.length; ++i) {
if (typeof req.docs[i] !== 'object' || Array.isArray(req.docs[i])) {
return callback(createError(NOT_AN_OBJECT));
}
}
var attachmentError;
req.docs.forEach(function (doc) {
if (doc._attachments) {
Object.keys(doc._attachments).forEach(function (name) {
attachmentError = attachmentError || attachmentNameError(name);
if (!doc._attachments[name].content_type) {
guardedConsole('warn', 'Attachment', name, 'on document', doc._id, 'is missing content_type');
}
});
}
});
if (attachmentError) {
return callback(createError(BAD_REQUEST, attachmentError));
}
if (!('new_edits' in opts)) {
if ('new_edits' in req) {
opts.new_edits = req.new_edits;
} else {
opts.new_edits = true;
}
}
var adapter = this;
if (!opts.new_edits && !isRemote(adapter)) {
// ensure revisions of the same doc are sorted, so that
// the local adapter processes them correctly (#2935)
req.docs.sort(compareByIdThenRev);
}
cleanDocs(req.docs);
// in the case of conflicts, we want to return the _ids to the user
// however, the underlying adapter may destroy the docs array, so
// create a copy here
var ids = req.docs.map(function (doc) {
return doc._id;
});
return this._bulkDocs(req, opts, function (err, res$$1) {
if (err) {
return callback(err);
}
if (!opts.new_edits) {
// this is what couch does when new_edits is false
res$$1 = res$$1.filter(function (x) {
return x.error;
});
}
// add ids for error/conflict responses (not required for CouchDB)
if (!isRemote(adapter)) {
for (var i = 0, l = res$$1.length; i < l; i++) {
res$$1[i].id = res$$1[i].id || ids[i];
}
}
callback(null, res$$1);
});
});
AbstractPouchDB.prototype.registerDependentDatabase =
adapterFun('registerDependentDatabase', function (dependentDb,
callback) {
var depDB = new this.constructor(dependentDb, this.__opts);
function diffFun(doc) {
doc.dependentDbs = doc.dependentDbs || {};
if (doc.dependentDbs[dependentDb]) {
return false; // no update required
}
doc.dependentDbs[dependentDb] = true;
return doc;
}
upsert(this, '_local/_pouch_dependentDbs', diffFun)
.then(function () {
callback(null, {db: depDB});
}).catch(callback);
});
AbstractPouchDB.prototype.destroy =
adapterFun('destroy', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var self = this;
var usePrefix = 'use_prefix' in self ? self.use_prefix : true;
function destroyDb() {
// call destroy method of the particular adaptor
self._destroy(opts, function (err, resp) {
if (err) {
return callback(err);
}
self._destroyed = true;
self.emit('destroyed');
callback(null, resp || { 'ok': true });
});
}
if (isRemote(self)) {
// no need to check for dependent DBs if it's a remote DB
return destroyDb();
}
self.get('_local/_pouch_dependentDbs', function (err, localDoc) {
if (err) {
/* istanbul ignore if */
if (err.status !== 404) {
return callback(err);
} else { // no dependencies
return destroyDb();
}
}
var dependentDbs = localDoc.dependentDbs;
var PouchDB = self.constructor;
var deletedMap = Object.keys(dependentDbs).map(function (name) {
// use_prefix is only false in the browser
/* istanbul ignore next */
var trueName = usePrefix ?
name.replace(new RegExp('^' + PouchDB.prefix), '') : name;
return new PouchDB(trueName, self.__opts).destroy();
});
PouchPromise$1.all(deletedMap).then(destroyDb, callback);
});
});
function TaskQueue$1() {
this.isReady = false;
this.failed = false;
this.queue = [];
}
TaskQueue$1.prototype.execute = function () {
var fun;
if (this.failed) {
while ((fun = this.queue.shift())) {
fun(this.failed);
}
} else {
while ((fun = this.queue.shift())) {
fun();
}
}
};
TaskQueue$1.prototype.fail = function (err) {
this.failed = err;
this.execute();
};
TaskQueue$1.prototype.ready = function (db) {
this.isReady = true;
this.db = db;
this.execute();
};
TaskQueue$1.prototype.addTask = function (fun) {
this.queue.push(fun);
if (this.failed) {
this.execute();
}
};
function parseAdapter(name, opts) {
var match = name.match(/([a-z-]*):\/\/(.*)/);
if (match) {
// the http adapter expects the fully qualified name
return {
name: /https?/.test(match[1]) ? match[1] + '://' + match[2] : match[2],
adapter: match[1]
};
}
var adapters = PouchDB$5.adapters;
var preferredAdapters = PouchDB$5.preferredAdapters;
var prefix = PouchDB$5.prefix;
var adapterName = opts.adapter;
if (!adapterName) { // automatically determine adapter
for (var i = 0; i < preferredAdapters.length; ++i) {
adapterName = preferredAdapters[i];
// check for browsers that have been upgraded from websql-only to websql+idb
/* istanbul ignore if */
if (adapterName === 'idb' && 'websql' in adapters &&
hasLocalStorage() && localStorage['_pouch__websqldb_' + prefix + name]) {
// log it, because this can be confusing during development
guardedConsole('log', 'PouchDB is downgrading "' + name + '" to WebSQL to' +
' avoid data loss, because it was already opened with WebSQL.');
continue; // keep using websql to avoid user data loss
}
break;
}
}
var adapter = adapters[adapterName];
// if adapter is invalid, then an error will be thrown later
var usePrefix = (adapter && 'use_prefix' in adapter) ?
adapter.use_prefix : true;
return {
name: usePrefix ? (prefix + name) : name,
adapter: adapterName
};
}
// OK, so here's the deal. Consider this code:
// var db1 = new PouchDB('foo');
// var db2 = new PouchDB('foo');
// db1.destroy();
// ^ these two both need to emit 'destroyed' events,
// as well as the PouchDB constructor itself.
// So we have one db object (whichever one got destroy() called on it)
// responsible for emitting the initial event, which then gets emitted
// by the constructor, which then broadcasts it to any other dbs
// that may have been created with the same name.
function prepareForDestruction(self) {
function onDestroyed(from_constructor) {
self.removeListener('closed', onClosed);
if (!from_constructor) {
self.constructor.emit('destroyed', self.name);
}
}
function onClosed() {
self.removeListener('destroyed', onDestroyed);
self.constructor.emit('unref', self);
}
self.once('destroyed', onDestroyed);
self.once('closed', onClosed);
self.constructor.emit('ref', self);
}
inherits(PouchDB$5, AbstractPouchDB);
function PouchDB$5(name, opts) {
// In Node our test suite only tests this for PouchAlt unfortunately
/* istanbul ignore if */
if (!(this instanceof PouchDB$5)) {
return new PouchDB$5(name, opts);
}
var self = this;
opts = opts || {};
if (name && typeof name === 'object') {
opts = name;
name = opts.name;
delete opts.name;
}
this.__opts = opts = clone(opts);
self.auto_compaction = opts.auto_compaction;
self.prefix = PouchDB$5.prefix;
if (typeof name !== 'string') {
throw new Error('Missing/invalid DB name');
}
var prefixedName = (opts.prefix || '') + name;
var backend = parseAdapter(prefixedName, opts);
opts.name = backend.name;
opts.adapter = opts.adapter || backend.adapter;
self.name = name;
self._adapter = opts.adapter;
PouchDB$5.emit('debug', ['adapter', 'Picked adapter: ', opts.adapter]);
if (!PouchDB$5.adapters[opts.adapter] ||
!PouchDB$5.adapters[opts.adapter].valid()) {
throw new Error('Invalid Adapter: ' + opts.adapter);
}
AbstractPouchDB.call(self);
self.taskqueue = new TaskQueue$1();
self.adapter = opts.adapter;
PouchDB$5.adapters[opts.adapter].call(self, opts, function (err) {
if (err) {
return self.taskqueue.fail(err);
}
prepareForDestruction(self);
self.emit('created', self);
PouchDB$5.emit('created', self.name);
self.taskqueue.ready(self);
});
}
PouchDB$5.adapters = {};
PouchDB$5.preferredAdapters = [];
PouchDB$5.prefix = '_pouch_';
var eventEmitter = new events.EventEmitter();
function setUpEventEmitter(Pouch) {
Object.keys(events.EventEmitter.prototype).forEach(function (key) {
if (typeof events.EventEmitter.prototype[key] === 'function') {
Pouch[key] = eventEmitter[key].bind(eventEmitter);
}
});
// these are created in constructor.js, and allow us to notify each DB with
// the same name that it was destroyed, via the constructor object
var destructListeners = Pouch._destructionListeners = new ExportedMap();
Pouch.on('ref', function onConstructorRef(db) {
if (!destructListeners.has(db.name)) {
destructListeners.set(db.name, []);
}
destructListeners.get(db.name).push(db);
});
Pouch.on('unref', function onConstructorUnref(db) {
if (!destructListeners.has(db.name)) {
return;
}
var dbList = destructListeners.get(db.name);
var pos = dbList.indexOf(db);
if (pos < 0) {
/* istanbul ignore next */
return;
}
dbList.splice(pos, 1);
if (dbList.length > 1) {
/* istanbul ignore next */
destructListeners.set(db.name, dbList);
} else {
destructListeners.delete(db.name);
}
});
Pouch.on('destroyed', function onConstructorDestroyed(name) {
if (!destructListeners.has(name)) {
return;
}
var dbList = destructListeners.get(name);
destructListeners.delete(name);
dbList.forEach(function (db) {
db.emit('destroyed',true);
});
});
}
setUpEventEmitter(PouchDB$5);
PouchDB$5.adapter = function (id, obj$$1, addToPreferredAdapters) {
/* istanbul ignore else */
if (obj$$1.valid()) {
PouchDB$5.adapters[id] = obj$$1;
if (addToPreferredAdapters) {
PouchDB$5.preferredAdapters.push(id);
}
}
};
PouchDB$5.plugin = function (obj$$1) {
if (typeof obj$$1 === 'function') { // function style for plugins
obj$$1(PouchDB$5);
} else if (typeof obj$$1 !== 'object' || Object.keys(obj$$1).length === 0) {
throw new Error('Invalid plugin: got "' + obj$$1 + '", expected an object or a function');
} else {
Object.keys(obj$$1).forEach(function (id) { // object style for plugins
PouchDB$5.prototype[id] = obj$$1[id];
});
}
if (this.__defaults) {
PouchDB$5.__defaults = $inject_Object_assign({}, this.__defaults);
}
return PouchDB$5;
};
PouchDB$5.defaults = function (defaultOpts) {
function PouchAlt(name, opts) {
if (!(this instanceof PouchAlt)) {
return new PouchAlt(name, opts);
}
opts = opts || {};
if (name && typeof name === 'object') {
opts = name;
name = opts.name;
delete opts.name;
}
opts = $inject_Object_assign({}, PouchAlt.__defaults, opts);
PouchDB$5.call(this, name, opts);
}
inherits(PouchAlt, PouchDB$5);
PouchAlt.preferredAdapters = PouchDB$5.preferredAdapters.slice();
Object.keys(PouchDB$5).forEach(function (key) {
if (!(key in PouchAlt)) {
PouchAlt[key] = PouchDB$5[key];
}
});
// make default options transitive
// https://github.com/pouchdb/pouchdb/issues/5922
PouchAlt.__defaults = $inject_Object_assign({}, this.__defaults, defaultOpts);
return PouchAlt;
};
// managed automatically by set-version.js
var version = "6.3.4";
function debugPouch(PouchDB) {
PouchDB.debug = debug;
var logs = {};
/* istanbul ignore next */
PouchDB.on('debug', function (args) {
// first argument is log identifier
var logId = args[0];
// rest should be passed verbatim to debug module
var logArgs = args.slice(1);
if (!logs[logId]) {
logs[logId] = debug('pouchdb:' + logId);
}
logs[logId].apply(null, logArgs);
});
}
// this would just be "return doc[field]", but fields
// can be "deep" due to dot notation
function getFieldFromDoc(doc, parsedField) {
var value = doc;
for (var i = 0, len = parsedField.length; i < len; i++) {
var key = parsedField[i];
value = value[key];
if (!value) {
break;
}
}
return value;
}
function compare$1(left, right) {
return left < right ? -1 : left > right ? 1 : 0;
}
// Converts a string in dot notation to an array of its components, with backslash escaping
function parseField(fieldName) {
// fields may be deep (e.g. "foo.bar.baz"), so parse
var fields = [];
var current = '';
for (var i = 0, len = fieldName.length; i < len; i++) {
var ch = fieldName[i];
if (ch === '.') {
if (i > 0 && fieldName[i - 1] === '\\') { // escaped delimiter
current = current.substring(0, current.length - 1) + '.';
} else { // not escaped, so delimiter
fields.push(current);
current = '';
}
} else { // normal character
current += ch;
}
}
fields.push(current);
return fields;
}
var combinationFields = ['$or', '$nor', '$not'];
function isCombinationalField(field) {
return combinationFields.indexOf(field) > -1;
}
function getKey(obj$$1) {
return Object.keys(obj$$1)[0];
}
function getValue(obj$$1) {
return obj$$1[getKey(obj$$1)];
}
// flatten an array of selectors joined by an $and operator
function mergeAndedSelectors(selectors) {
// sort to ensure that e.g. if the user specified
// $and: [{$gt: 'a'}, {$gt: 'b'}], then it's collapsed into
// just {$gt: 'b'}
var res$$1 = {};
selectors.forEach(function (selector) {
Object.keys(selector).forEach(function (field) {
var matcher = selector[field];
if (typeof matcher !== 'object') {
matcher = {$eq: matcher};
}
if (isCombinationalField(field)) {
if (matcher instanceof Array) {
res$$1[field] = matcher.map(function (m) {
return mergeAndedSelectors([m]);
});
} else {
res$$1[field] = mergeAndedSelectors([matcher]);
}
} else {
var fieldMatchers = res$$1[field] = res$$1[field] || {};
Object.keys(matcher).forEach(function (operator) {
var value = matcher[operator];
if (operator === '$gt' || operator === '$gte') {
return mergeGtGte(operator, value, fieldMatchers);
} else if (operator === '$lt' || operator === '$lte') {
return mergeLtLte(operator, value, fieldMatchers);
} else if (operator === '$ne') {
return mergeNe(value, fieldMatchers);
} else if (operator === '$eq') {
return mergeEq(value, fieldMatchers);
}
fieldMatchers[operator] = value;
});
}
});
});
return res$$1;
}
// collapse logically equivalent gt/gte values
function mergeGtGte(operator, value, fieldMatchers) {
if (typeof fieldMatchers.$eq !== 'undefined') {
return; // do nothing
}
if (typeof fieldMatchers.$gte !== 'undefined') {
if (operator === '$gte') {
if (value > fieldMatchers.$gte) { // more specificity
fieldMatchers.$gte = value;
}
} else { // operator === '$gt'
if (value >= fieldMatchers.$gte) { // more specificity
delete fieldMatchers.$gte;
fieldMatchers.$gt = value;
}
}
} else if (typeof fieldMatchers.$gt !== 'undefined') {
if (operator === '$gte') {
if (value > fieldMatchers.$gt) { // more specificity
delete fieldMatchers.$gt;
fieldMatchers.$gte = value;
}
} else { // operator === '$gt'
if (value > fieldMatchers.$gt) { // more specificity
fieldMatchers.$gt = value;
}
}
} else {
fieldMatchers[operator] = value;
}
}
// collapse logically equivalent lt/lte values
function mergeLtLte(operator, value, fieldMatchers) {
if (typeof fieldMatchers.$eq !== 'undefined') {
return; // do nothing
}
if (typeof fieldMatchers.$lte !== 'undefined') {
if (operator === '$lte') {
if (value < fieldMatchers.$lte) { // more specificity
fieldMatchers.$lte = value;
}
} else { // operator === '$gt'
if (value <= fieldMatchers.$lte) { // more specificity
delete fieldMatchers.$lte;
fieldMatchers.$lt = value;
}
}
} else if (typeof fieldMatchers.$lt !== 'undefined') {
if (operator === '$lte') {
if (value < fieldMatchers.$lt) { // more specificity
delete fieldMatchers.$lt;
fieldMatchers.$lte = value;
}
} else { // operator === '$gt'
if (value < fieldMatchers.$lt) { // more specificity
fieldMatchers.$lt = value;
}
}
} else {
fieldMatchers[operator] = value;
}
}
// combine $ne values into one array
function mergeNe(value, fieldMatchers) {
if ('$ne' in fieldMatchers) {
// there are many things this could "not" be
fieldMatchers.$ne.push(value);
} else { // doesn't exist yet
fieldMatchers.$ne = [value];
}
}
// add $eq into the mix
function mergeEq(value, fieldMatchers) {
// these all have less specificity than the $eq
// TODO: check for user errors here
delete fieldMatchers.$gt;
delete fieldMatchers.$gte;
delete fieldMatchers.$lt;
delete fieldMatchers.$lte;
delete fieldMatchers.$ne;
fieldMatchers.$eq = value;
}
//
// normalize the selector
//
function massageSelector(input) {
var result = clone(input);
var wasAnded = false;
if ('$and' in result) {
result = mergeAndedSelectors(result['$and']);
wasAnded = true;
}
['$or', '$nor'].forEach(function (orOrNor) {
if (orOrNor in result) {
// message each individual selector
// e.g. {foo: 'bar'} becomes {foo: {$eq: 'bar'}}
result[orOrNor].forEach(function (subSelector) {
var fields = Object.keys(subSelector);
for (var i = 0; i < fields.length; i++) {
var field = fields[i];
var matcher = subSelector[field];
if (typeof matcher !== 'object' || matcher === null) {
subSelector[field] = {$eq: matcher};
}
}
});
}
});
if ('$not' in result) {
//This feels a little like forcing, but it will work for now,
//I would like to come back to this and make the merging of selectors a little more generic
result['$not'] = mergeAndedSelectors([result['$not']]);
}
var fields = Object.keys(result);
for (var i = 0; i < fields.length; i++) {
var field = fields[i];
var matcher = result[field];
if (typeof matcher !== 'object' || matcher === null) {
matcher = {$eq: matcher};
} else if ('$ne' in matcher && !wasAnded) {
// I put these in an array, since there may be more than one
// but in the "mergeAnded" operation, I already take care of that
matcher.$ne = [matcher.$ne];
}
result[field] = matcher;
}
return result;
}
function pad(str, padWith, upToLength) {
var padding = '';
var targetLength = upToLength - str.length;
/* istanbul ignore next */
while (padding.length < targetLength) {
padding += padWith;
}
return padding;
}
function padLeft(str, padWith, upToLength) {
var padding = pad(str, padWith, upToLength);
return padding + str;
}
var MIN_MAGNITUDE = -324; // verified by -Number.MIN_VALUE
var MAGNITUDE_DIGITS = 3; // ditto
var SEP = ''; // set to '_' for easier debugging
function collate(a, b) {
if (a === b) {
return 0;
}
a = normalizeKey(a);
b = normalizeKey(b);
var ai = collationIndex(a);
var bi = collationIndex(b);
if ((ai - bi) !== 0) {
return ai - bi;
}
switch (typeof a) {
case 'number':
return a - b;
case 'boolean':
return a < b ? -1 : 1;
case 'string':
return stringCollate(a, b);
}
return Array.isArray(a) ? arrayCollate(a, b) : objectCollate(a, b);
}
// couch considers null/NaN/Infinity/-Infinity === undefined,
// for the purposes of mapreduce indexes. also, dates get stringified.
function normalizeKey(key) {
switch (typeof key) {
case 'undefined':
return null;
case 'number':
if (key === Infinity || key === -Infinity || isNaN(key)) {
return null;
}
return key;
case 'object':
var origKey = key;
if (Array.isArray(key)) {
var len = key.length;
key = new Array(len);
for (var i = 0; i < len; i++) {
key[i] = normalizeKey(origKey[i]);
}
/* istanbul ignore next */
} else if (key instanceof Date) {
return key.toJSON();
} else if (key !== null) { // generic object
key = {};
for (var k in origKey) {
if (origKey.hasOwnProperty(k)) {
var val = origKey[k];
if (typeof val !== 'undefined') {
key[k] = normalizeKey(val);
}
}
}
}
}
return key;
}
function indexify(key) {
if (key !== null) {
switch (typeof key) {
case 'boolean':
return key ? 1 : 0;
case 'number':
return numToIndexableString(key);
case 'string':
// We've to be sure that key does not contain \u0000
// Do order-preserving replacements:
// 0 -> 1, 1
// 1 -> 1, 2
// 2 -> 2, 2
return key
.replace(/\u0002/g, '\u0002\u0002')
.replace(/\u0001/g, '\u0001\u0002')
.replace(/\u0000/g, '\u0001\u0001');
case 'object':
var isArray = Array.isArray(key);
var arr = isArray ? key : Object.keys(key);
var i = -1;
var len = arr.length;
var result = '';
if (isArray) {
while (++i < len) {
result += toIndexableString(arr[i]);
}
} else {
while (++i < len) {
var objKey = arr[i];
result += toIndexableString(objKey) +
toIndexableString(key[objKey]);
}
}
return result;
}
}
return '';
}
// convert the given key to a string that would be appropriate
// for lexical sorting, e.g. within a database, where the
// sorting is the same given by the collate() function.
function toIndexableString(key) {
var zero = '\u0000';
key = normalizeKey(key);
return collationIndex(key) + SEP + indexify(key) + zero;
}
function parseNumber(str, i) {
var originalIdx = i;
var num;
var zero = str[i] === '1';
if (zero) {
num = 0;
i++;
} else {
var neg = str[i] === '0';
i++;
var numAsString = '';
var magAsString = str.substring(i, i + MAGNITUDE_DIGITS);
var magnitude = parseInt(magAsString, 10) + MIN_MAGNITUDE;
/* istanbul ignore next */
if (neg) {
magnitude = -magnitude;
}
i += MAGNITUDE_DIGITS;
while (true) {
var ch = str[i];
if (ch === '\u0000') {
break;
} else {
numAsString += ch;
}
i++;
}
numAsString = numAsString.split('.');
if (numAsString.length === 1) {
num = parseInt(numAsString, 10);
} else {
/* istanbul ignore next */
num = parseFloat(numAsString[0] + '.' + numAsString[1]);
}
/* istanbul ignore next */
if (neg) {
num = num - 10;
}
/* istanbul ignore next */
if (magnitude !== 0) {
// parseFloat is more reliable than pow due to rounding errors
// e.g. Number.MAX_VALUE would return Infinity if we did
// num * Math.pow(10, magnitude);
num = parseFloat(num + 'e' + magnitude);
}
}
return {num: num, length : i - originalIdx};
}
// move up the stack while parsing
// this function moved outside of parseIndexableString for performance
function pop(stack, metaStack) {
var obj$$1 = stack.pop();
if (metaStack.length) {
var lastMetaElement = metaStack[metaStack.length - 1];
if (obj$$1 === lastMetaElement.element) {
// popping a meta-element, e.g. an object whose value is another object
metaStack.pop();
lastMetaElement = metaStack[metaStack.length - 1];
}
var element = lastMetaElement.element;
var lastElementIndex = lastMetaElement.index;
if (Array.isArray(element)) {
element.push(obj$$1);
} else if (lastElementIndex === stack.length - 2) { // obj with key+value
var key = stack.pop();
element[key] = obj$$1;
} else {
stack.push(obj$$1); // obj with key only
}
}
}
function parseIndexableString(str) {
var stack = [];
var metaStack = []; // stack for arrays and objects
var i = 0;
/*eslint no-constant-condition: ["error", { "checkLoops": false }]*/
while (true) {
var collationIndex = str[i++];
if (collationIndex === '\u0000') {
if (stack.length === 1) {
return stack.pop();
} else {
pop(stack, metaStack);
continue;
}
}
switch (collationIndex) {
case '1':
stack.push(null);
break;
case '2':
stack.push(str[i] === '1');
i++;
break;
case '3':
var parsedNum = parseNumber(str, i);
stack.push(parsedNum.num);
i += parsedNum.length;
break;
case '4':
var parsedStr = '';
/*eslint no-constant-condition: ["error", { "checkLoops": false }]*/
while (true) {
var ch = str[i];
if (ch === '\u0000') {
break;
}
parsedStr += ch;
i++;
}
// perform the reverse of the order-preserving replacement
// algorithm (see above)
parsedStr = parsedStr.replace(/\u0001\u0001/g, '\u0000')
.replace(/\u0001\u0002/g, '\u0001')
.replace(/\u0002\u0002/g, '\u0002');
stack.push(parsedStr);
break;
case '5':
var arrayElement = { element: [], index: stack.length };
stack.push(arrayElement.element);
metaStack.push(arrayElement);
break;
case '6':
var objElement = { element: {}, index: stack.length };
stack.push(objElement.element);
metaStack.push(objElement);
break;
/* istanbul ignore next */
default:
throw new Error(
'bad collationIndex or unexpectedly reached end of input: ' +
collationIndex);
}
}
}
function arrayCollate(a, b) {
var len = Math.min(a.length, b.length);
for (var i = 0; i < len; i++) {
var sort = collate(a[i], b[i]);
if (sort !== 0) {
return sort;
}
}
return (a.length === b.length) ? 0 :
(a.length > b.length) ? 1 : -1;
}
function stringCollate(a, b) {
// See: https://github.com/daleharvey/pouchdb/issues/40
// This is incompatible with the CouchDB implementation, but its the
// best we can do for now
return (a === b) ? 0 : ((a > b) ? 1 : -1);
}
function objectCollate(a, b) {
var ak = Object.keys(a), bk = Object.keys(b);
var len = Math.min(ak.length, bk.length);
for (var i = 0; i < len; i++) {
// First sort the keys
var sort = collate(ak[i], bk[i]);
if (sort !== 0) {
return sort;
}
// if the keys are equal sort the values
sort = collate(a[ak[i]], b[bk[i]]);
if (sort !== 0) {
return sort;
}
}
return (ak.length === bk.length) ? 0 :
(ak.length > bk.length) ? 1 : -1;
}
// The collation is defined by erlangs ordered terms
// the atoms null, true, false come first, then numbers, strings,
// arrays, then objects
// null/undefined/NaN/Infinity/-Infinity are all considered null
function collationIndex(x) {
var id = ['boolean', 'number', 'string', 'object'];
var idx = id.indexOf(typeof x);
//false if -1 otherwise true, but fast!!!!1
if (~idx) {
if (x === null) {
return 1;
}
if (Array.isArray(x)) {
return 5;
}
return idx < 3 ? (idx + 2) : (idx + 3);
}
/* istanbul ignore next */
if (Array.isArray(x)) {
return 5;
}
}
// conversion:
// x yyy zz...zz
// x = 0 for negative, 1 for 0, 2 for positive
// y = exponent (for negative numbers negated) moved so that it's >= 0
// z = mantisse
function numToIndexableString(num) {
if (num === 0) {
return '1';
}
// convert number to exponential format for easier and
// more succinct string sorting
var expFormat = num.toExponential().split(/e\+?/);
var magnitude = parseInt(expFormat[1], 10);
var neg = num < 0;
var result = neg ? '0' : '2';
// first sort by magnitude
// it's easier if all magnitudes are positive
var magForComparison = ((neg ? -magnitude : magnitude) - MIN_MAGNITUDE);
var magString = padLeft((magForComparison).toString(), '0', MAGNITUDE_DIGITS);
result += SEP + magString;
// then sort by the factor
var factor = Math.abs(parseFloat(expFormat[0])); // [1..10)
/* istanbul ignore next */
if (neg) { // for negative reverse ordering
factor = 10 - factor;
}
var factorStr = factor.toFixed(20);
// strip zeros from the end
factorStr = factorStr.replace(/\.?0+$/, '');
result += SEP + factorStr;
return result;
}
// create a comparator based on the sort object
function createFieldSorter(sort) {
function getFieldValuesAsArray(doc) {
return sort.map(function (sorting) {
var fieldName = getKey(sorting);
var parsedField = parseField(fieldName);
var docFieldValue = getFieldFromDoc(doc, parsedField);
return docFieldValue;
});
}
return function (aRow, bRow) {
var aFieldValues = getFieldValuesAsArray(aRow.doc);
var bFieldValues = getFieldValuesAsArray(bRow.doc);
var collation = collate(aFieldValues, bFieldValues);
if (collation !== 0) {
return collation;
}
// this is what mango seems to do
return compare$1(aRow.doc._id, bRow.doc._id);
};
}
function filterInMemoryFields(rows, requestDef, inMemoryFields) {
rows = rows.filter(function (row) {
return rowFilter(row.doc, requestDef.selector, inMemoryFields);
});
if (requestDef.sort) {
// in-memory sort
var fieldSorter = createFieldSorter(requestDef.sort);
rows = rows.sort(fieldSorter);
if (typeof requestDef.sort[0] !== 'string' &&
getValue(requestDef.sort[0]) === 'desc') {
rows = rows.reverse();
}
}
if ('limit' in requestDef || 'skip' in requestDef) {
// have to do the limit in-memory
var skip = requestDef.skip || 0;
var limit = ('limit' in requestDef ? requestDef.limit : rows.length) + skip;
rows = rows.slice(skip, limit);
}
return rows;
}
function rowFilter(doc, selector, inMemoryFields) {
return inMemoryFields.every(function (field) {
var matcher = selector[field];
var parsedField = parseField(field);
var docFieldValue = getFieldFromDoc(doc, parsedField);
if (isCombinationalField(field)) {
return matchCominationalSelector(field, matcher, doc);
}
return matchSelector(matcher, doc, parsedField, docFieldValue);
});
}
function matchSelector(matcher, doc, parsedField, docFieldValue) {
if (!matcher) {
// no filtering necessary; this field is just needed for sorting
return true;
}
return Object.keys(matcher).every(function (userOperator) {
var userValue = matcher[userOperator];
return match(userOperator, doc, userValue, parsedField, docFieldValue);
});
}
function matchCominationalSelector(field, matcher, doc) {
if (field === '$or') {
return matcher.some(function (orMatchers) {
return rowFilter(doc, orMatchers, Object.keys(orMatchers));
});
}
if (field === '$not') {
return !rowFilter(doc, matcher, Object.keys(matcher));
}
//`$nor`
return !matcher.find(function (orMatchers) {
return rowFilter(doc, orMatchers, Object.keys(orMatchers));
});
}
function match(userOperator, doc, userValue, parsedField, docFieldValue) {
if (!matchers[userOperator]) {
throw new Error('unknown operator "' + userOperator +
'" - should be one of $eq, $lte, $lt, $gt, $gte, $exists, $ne, $in, ' +
'$nin, $size, $mod, $regex, $elemMatch, $type, $allMatch or $all');
}
return matchers[userOperator](doc, userValue, parsedField, docFieldValue);
}
function fieldExists(docFieldValue) {
return typeof docFieldValue !== 'undefined' && docFieldValue !== null;
}
function fieldIsNotUndefined(docFieldValue) {
return typeof docFieldValue !== 'undefined';
}
function modField(docFieldValue, userValue) {
var divisor = userValue[0];
var mod = userValue[1];
if (divisor === 0) {
throw new Error('Bad divisor, cannot divide by zero');
}
if (parseInt(divisor, 10) !== divisor ) {
throw new Error('Divisor is not an integer');
}
if (parseInt(mod, 10) !== mod ) {
throw new Error('Modulus is not an integer');
}
if (parseInt(docFieldValue, 10) !== docFieldValue) {
return false;
}
return docFieldValue % divisor === mod;
}
function arrayContainsValue(docFieldValue, userValue) {
return userValue.some(function (val) {
if (docFieldValue instanceof Array) {
return docFieldValue.indexOf(val) > -1;
}
return docFieldValue === val;
});
}
function arrayContainsAllValues(docFieldValue, userValue) {
return userValue.every(function (val) {
return docFieldValue.indexOf(val) > -1;
});
}
function arraySize(docFieldValue, userValue) {
return docFieldValue.length === userValue;
}
function regexMatch(docFieldValue, userValue) {
var re = new RegExp(userValue);
return re.test(docFieldValue);
}
function typeMatch(docFieldValue, userValue) {
switch (userValue) {
case 'null':
return docFieldValue === null;
case 'boolean':
return typeof (docFieldValue) === 'boolean';
case 'number':
return typeof (docFieldValue) === 'number';
case 'string':
return typeof (docFieldValue) === 'string';
case 'array':
return docFieldValue instanceof Array;
case 'object':
return ({}).toString.call(docFieldValue) === '[object Object]';
}
throw new Error(userValue + ' not supported as a type.' +
'Please use one of object, string, array, number, boolean or null.');
}
var matchers = {
'$elemMatch': function (doc, userValue, parsedField, docFieldValue) {
if (!Array.isArray(docFieldValue)) {
return false;
}
if (docFieldValue.length === 0) {
return false;
}
if (typeof docFieldValue[0] === 'object') {
return docFieldValue.some(function (val) {
return rowFilter(val, userValue, Object.keys(userValue));
});
}
return docFieldValue.some(function (val) {
return matchSelector(userValue, doc, parsedField, val);
});
},
'$allMatch': function (doc, userValue, parsedField, docFieldValue) {
if (!Array.isArray(docFieldValue)) {
return false;
}
/* istanbul ignore next */
if (docFieldValue.length === 0) {
return false;
}
if (typeof docFieldValue[0] === 'object') {
return docFieldValue.every(function (val) {
return rowFilter(val, userValue, Object.keys(userValue));
});
}
return docFieldValue.every(function (val) {
return matchSelector(userValue, doc, parsedField, val);
});
},
'$eq': function (doc, userValue, parsedField, docFieldValue) {
return fieldIsNotUndefined(docFieldValue) && collate(docFieldValue, userValue) === 0;
},
'$gte': function (doc, userValue, parsedField, docFieldValue) {
return fieldIsNotUndefined(docFieldValue) && collate(docFieldValue, userValue) >= 0;
},
'$gt': function (doc, userValue, parsedField, docFieldValue) {
return fieldIsNotUndefined(docFieldValue) && collate(docFieldValue, userValue) > 0;
},
'$lte': function (doc, userValue, parsedField, docFieldValue) {
return fieldIsNotUndefined(docFieldValue) && collate(docFieldValue, userValue) <= 0;
},
'$lt': function (doc, userValue, parsedField, docFieldValue) {
return fieldIsNotUndefined(docFieldValue) && collate(docFieldValue, userValue) < 0;
},
'$exists': function (doc, userValue, parsedField, docFieldValue) {
//a field that is null is still considered to exist
if (userValue) {
return fieldIsNotUndefined(docFieldValue);
}
return !fieldIsNotUndefined(docFieldValue);
},
'$mod': function (doc, userValue, parsedField, docFieldValue) {
return fieldExists(docFieldValue) && modField(docFieldValue, userValue);
},
'$ne': function (doc, userValue, parsedField, docFieldValue) {
return userValue.every(function (neValue) {
return collate(docFieldValue, neValue) !== 0;
});
},
'$in': function (doc, userValue, parsedField, docFieldValue) {
return fieldExists(docFieldValue) && arrayContainsValue(docFieldValue, userValue);
},
'$nin': function (doc, userValue, parsedField, docFieldValue) {
return fieldExists(docFieldValue) && !arrayContainsValue(docFieldValue, userValue);
},
'$size': function (doc, userValue, parsedField, docFieldValue) {
return fieldExists(docFieldValue) && arraySize(docFieldValue, userValue);
},
'$all': function (doc, userValue, parsedField, docFieldValue) {
return Array.isArray(docFieldValue) && arrayContainsAllValues(docFieldValue, userValue);
},
'$regex': function (doc, userValue, parsedField, docFieldValue) {
return fieldExists(docFieldValue) && regexMatch(docFieldValue, userValue);
},
'$type': function (doc, userValue, parsedField, docFieldValue) {
return typeMatch(docFieldValue, userValue);
}
};
// return true if the given doc matches the supplied selector
function matchesSelector(doc, selector) {
/* istanbul ignore if */
if (typeof selector !== 'object') {
// match the CouchDB error message
throw new Error('Selector error: expected a JSON object');
}
selector = massageSelector(selector);
var row = {
'doc': doc
};
var rowsMatched = filterInMemoryFields([row], { 'selector': selector }, Object.keys(selector));
return rowsMatched && rowsMatched.length === 1;
}
function evalFilter(input) {
var code = '(function() {\n"use strict";\nreturn ' + input + '\n})()';
return vm.runInNewContext(code);
}
function evalView(input) {
var code = [
'"use strict";',
'var emitted = false;',
'var emit = function (a, b) {',
' emitted = true;',
'};',
'var view = ' + input + ';',
'view(doc);',
'if (emitted) {',
' return true;',
'}'
].join('\n');
return vm.runInNewContext('(function(doc) {\n' + code + '\n})');
}
function validate(opts, callback) {
if (opts.selector) {
if (opts.filter && opts.filter !== '_selector') {
var filterName = typeof opts.filter === 'string' ?
opts.filter : 'function';
return callback(new Error('selector invalid for filter "' + filterName + '"'));
}
}
callback();
}
function normalize(opts) {
if (opts.view && !opts.filter) {
opts.filter = '_view';
}
if (opts.selector && !opts.filter) {
opts.filter = '_selector';
}
if (opts.filter && typeof opts.filter === 'string') {
if (opts.filter === '_view') {
opts.view = normalizeDesignDocFunctionName(opts.view);
} else {
opts.filter = normalizeDesignDocFunctionName(opts.filter);
}
}
}
function shouldFilter(changesHandler, opts) {
return opts.filter && typeof opts.filter === 'string' &&
!opts.doc_ids && !isRemote(changesHandler.db);
}
function filter(changesHandler, opts) {
var callback = opts.complete;
if (opts.filter === '_view') {
if (!opts.view || typeof opts.view !== 'string') {
var err = createError(BAD_REQUEST,
'`view` filter parameter not found or invalid.');
return callback(err);
}
// fetch a view from a design doc, make it behave like a filter
var viewName = parseDesignDocFunctionName(opts.view);
changesHandler.db.get('_design/' + viewName[0], function (err, ddoc) {
/* istanbul ignore if */
if (changesHandler.isCancelled) {
return callback(null, {status: 'cancelled'});
}
/* istanbul ignore next */
if (err) {
return callback(generateErrorFromResponse(err));
}
var mapFun = ddoc && ddoc.views && ddoc.views[viewName[1]] &&
ddoc.views[viewName[1]].map;
if (!mapFun) {
return callback(createError(MISSING_DOC,
(ddoc.views ? 'missing json key: ' + viewName[1] :
'missing json key: views')));
}
opts.filter = evalView(mapFun);
changesHandler.doChanges(opts);
});
} else if (opts.selector) {
opts.filter = function (doc) {
return matchesSelector(doc, opts.selector);
};
changesHandler.doChanges(opts);
} else {
// fetch a filter from a design doc
var filterName = parseDesignDocFunctionName(opts.filter);
changesHandler.db.get('_design/' + filterName[0], function (err, ddoc) {
/* istanbul ignore if */
if (changesHandler.isCancelled) {
return callback(null, {status: 'cancelled'});
}
/* istanbul ignore next */
if (err) {
return callback(generateErrorFromResponse(err));
}
var filterFun = ddoc && ddoc.filters && ddoc.filters[filterName[1]];
if (!filterFun) {
return callback(createError(MISSING_DOC,
((ddoc && ddoc.filters) ? 'missing json key: ' + filterName[1]
: 'missing json key: filters')));
}
opts.filter = evalFilter(filterFun);
changesHandler.doChanges(opts);
});
}
}
function applyChangesFilterPlugin(PouchDB) {
PouchDB._changesFilterPlugin = {
validate: validate,
normalize: normalize,
shouldFilter: shouldFilter,
filter: filter
};
}
// TODO: remove from pouchdb-core (breaking)
PouchDB$5.plugin(debugPouch);
// TODO: remove from pouchdb-core (breaking)
PouchDB$5.plugin(applyChangesFilterPlugin);
PouchDB$5.version = version;
function isFunction(f) {
return 'function' === typeof f;
}
function getPrefix(db) {
if (isFunction(db.prefix)) {
return db.prefix();
}
return db;
}
function clone$2(_obj) {
var obj$$1 = {};
for (var k in _obj) {
obj$$1[k] = _obj[k];
}
return obj$$1;
}
function nut(db, precodec, codec) {
function encodePrefix(prefix, key, opts1, opts2) {
return precodec.encode([ prefix, codec.encodeKey(key, opts1, opts2 ) ]);
}
function addEncodings(op, prefix) {
if (prefix && prefix.options) {
op.keyEncoding =
op.keyEncoding || prefix.options.keyEncoding;
op.valueEncoding =
op.valueEncoding || prefix.options.valueEncoding;
}
return op;
}
db.open(function () { /* no-op */});
return {
apply: function (ops, opts, cb) {
opts = opts || {};
var batch = [];
var i = -1;
var len = ops.length;
while (++i < len) {
var op = ops[i];
addEncodings(op, op.prefix);
op.prefix = getPrefix(op.prefix);
batch.push({
key: encodePrefix(op.prefix, op.key, opts, op),
value: op.type !== 'del' && codec.encodeValue(op.value, opts, op),
type: op.type
});
}
db.db.batch(batch, opts, cb);
},
get: function (key, prefix, opts, cb) {
opts.asBuffer = codec.valueAsBuffer(opts);
return db.db.get(
encodePrefix(prefix, key, opts),
opts,
function (err, value) {
if (err) {
cb(err);
} else {
cb(null, codec.decodeValue(value, opts));
}
}
);
},
createDecoder: function (opts) {
return function (key, value) {
return {
key: codec.decodeKey(precodec.decode(key)[1], opts),
value: codec.decodeValue(value, opts)
};
};
},
isClosed: function isClosed() {
return db.isClosed();
},
close: function close(cb) {
return db.close(cb);
},
iterator: function (_opts) {
var opts = clone$2(_opts || {});
var prefix = _opts.prefix || [];
function encodeKey(key) {
return encodePrefix(prefix, key, opts, {});
}
ltgt.toLtgt(_opts, opts, encodeKey, precodec.lowerBound, precodec.upperBound);
// if these legacy values are in the options, remove them
opts.prefix = null;
//************************************************
//hard coded defaults, for now...
//TODO: pull defaults and encoding out of levelup.
opts.keyAsBuffer = opts.valueAsBuffer = false;
//************************************************
//this is vital, otherwise limit: undefined will
//create an empty stream.
/* istanbul ignore next */
if ('number' !== typeof opts.limit) {
opts.limit = -1;
}
opts.keyAsBuffer = precodec.buffer;
opts.valueAsBuffer = codec.valueAsBuffer(opts);
function wrapIterator(iterator) {
return {
next: function (cb) {
return iterator.next(cb);
},
end: function (cb) {
iterator.end(cb);
}
};
}
return wrapIterator(db.db.iterator(opts));
}
};
}
function NotFoundError() {
Error.call(this);
}
inherits(NotFoundError, Error);
NotFoundError.prototype.name = 'NotFoundError';
var EventEmitter$1 = events__default.EventEmitter;
var version$1 = "6.5.4";
var NOT_FOUND_ERROR = new NotFoundError();
var sublevel$1 = function (nut, prefix, createStream, options) {
var emitter = new EventEmitter$1();
emitter.sublevels = {};
emitter.options = options;
emitter.version = version$1;
emitter.methods = {};
prefix = prefix || [];
function mergeOpts(opts) {
var o = {};
var k;
if (options) {
for (k in options) {
if (typeof options[k] !== 'undefined') {
o[k] = options[k];
}
}
}
if (opts) {
for (k in opts) {
if (typeof opts[k] !== 'undefined') {
o[k] = opts[k];
}
}
}
return o;
}
emitter.put = function (key, value, opts, cb) {
if ('function' === typeof opts) {
cb = opts;
opts = {};
}
nut.apply([{
key: key, value: value,
prefix: prefix.slice(), type: 'put'
}], mergeOpts(opts), function (err) {
/* istanbul ignore next */
if (err) {
return cb(err);
}
emitter.emit('put', key, value);
cb(null);
});
};
emitter.prefix = function () {
return prefix.slice();
};
emitter.batch = function (ops, opts, cb) {
if ('function' === typeof opts) {
cb = opts;
opts = {};
}
ops = ops.map(function (op) {
return {
key: op.key,
value: op.value,
prefix: op.prefix || prefix,
keyEncoding: op.keyEncoding, // *
valueEncoding: op.valueEncoding, // * (TODO: encodings on sublevel)
type: op.type
};
});
nut.apply(ops, mergeOpts(opts), function (err) {
/* istanbul ignore next */
if (err) {
return cb(err);
}
emitter.emit('batch', ops);
cb(null);
});
};
emitter.get = function (key, opts, cb) {
/* istanbul ignore else */
if ('function' === typeof opts) {
cb = opts;
opts = {};
}
nut.get(key, prefix, mergeOpts(opts), function (err, value) {
if (err) {
cb(NOT_FOUND_ERROR);
} else {
cb(null, value);
}
});
};
emitter.sublevel = function (name, opts) {
return emitter.sublevels[name] =
emitter.sublevels[name] || sublevel$1(nut, prefix.concat(name), createStream, mergeOpts(opts));
};
emitter.readStream = emitter.createReadStream = function (opts) {
opts = mergeOpts(opts);
opts.prefix = prefix;
var stream;
var it = nut.iterator(opts);
stream = createStream(opts, nut.createDecoder(opts));
stream.setIterator(it);
return stream;
};
emitter.close = function (cb) {
nut.close(cb);
};
emitter.isOpen = nut.isOpen;
emitter.isClosed = nut.isClosed;
return emitter;
};
/* Copyright (c) 2012-2014 LevelUP contributors
* See list at
* MIT License
*/
// NOTE: we are fixed to [email protected] for now
// for pure Streams2 across Node versions
var Readable = ReadableStreamCore.Readable;
function ReadStream(options, makeData) {
if (!(this instanceof ReadStream)) {
return new ReadStream(options, makeData);
}
Readable.call(this, { objectMode: true, highWaterMark: options.highWaterMark });
// purely to keep `db` around until we're done so it's not GCed if the user doesn't keep a ref
this._waiting = false;
this._options = options;
this._makeData = makeData;
}
inherits(ReadStream, Readable);
ReadStream.prototype.setIterator = function (it) {
this._iterator = it;
/* istanbul ignore if */
if (this._destroyed) {
return it.end(function () {});
}
/* istanbul ignore if */
if (this._waiting) {
this._waiting = false;
return this._read();
}
return this;
};
ReadStream.prototype._read = function read() {
var self = this;
/* istanbul ignore if */
if (self._destroyed) {
return;
}
/* istanbul ignore if */
if (!self._iterator) {
return this._waiting = true;
}
self._iterator.next(function (err, key, value) {
if (err || (key === undefined && value === undefined)) {
if (!err && !self._destroyed) {
self.push(null);
}
return self._cleanup(err);
}
value = self._makeData(key, value);
if (!self._destroyed) {
self.push(value);
}
});
};
ReadStream.prototype._cleanup = function (err) {
if (this._destroyed) {
return;
}
this._destroyed = true;
var self = this;
/* istanbul ignore if */
if (err) {
self.emit('error', err);
}
/* istanbul ignore else */
if (self._iterator) {
self._iterator.end(function () {
self._iterator = null;
self.emit('close');
});
} else {
self.emit('close');
}
};
ReadStream.prototype.destroy = function () {
this._cleanup();
};
var precodec = {
encode: function (decodedKey) {
return '\xff' + decodedKey[0] + '\xff' + decodedKey[1];
},
decode: function (encodedKeyAsBuffer) {
var str = encodedKeyAsBuffer.toString();
var idx = str.indexOf('\xff', 1);
return [str.substring(1, idx), str.substring(idx + 1)];
},
lowerBound: '\x00',
upperBound: '\xff'
};
var codec = new Codec();
function sublevelPouch(db) {
return sublevel$1(nut(db, precodec, codec), [], ReadStream, db.options);
}
function toObject(array) {
return array.reduce(function (obj$$1, item) {
obj$$1[item] = true;
return obj$$1;
}, {});
}
// List of top level reserved words for doc
var reservedWords = toObject([
'_id',
'_rev',
'_attachments',
'_deleted',
'_revisions',
'_revs_info',
'_conflicts',
'_deleted_conflicts',
'_local_seq',
'_rev_tree',
//replication documents
'_replication_id',
'_replication_state',
'_replication_state_time',
'_replication_state_reason',
'_replication_stats',
// Specific to Couchbase Sync Gateway
'_removed'
]);
// List of reserved words that should end up the document
var dataWords = toObject([
'_attachments',
//replication documents
'_replication_id',
'_replication_state',
'_replication_state_time',
'_replication_state_reason',
'_replication_stats'
]);
function parseRevisionInfo(rev$$1) {
if (!/^\d+-./.test(rev$$1)) {
return createError(INVALID_REV);
}
var idx = rev$$1.indexOf('-');
var left = rev$$1.substring(0, idx);
var right = rev$$1.substring(idx + 1);
return {
prefix: parseInt(left, 10),
id: right
};
}
function makeRevTreeFromRevisions(revisions, opts) {
var pos = revisions.start - revisions.ids.length + 1;
var revisionIds = revisions.ids;
var ids = [revisionIds[0], opts, []];
for (var i = 1, len = revisionIds.length; i < len; i++) {
ids = [revisionIds[i], {status: 'missing'}, [ids]];
}
return [{
pos: pos,
ids: ids
}];
}
// Preprocess documents, parse their revisions, assign an id and a
// revision for new writes that are missing them, etc
function parseDoc(doc, newEdits) {
var nRevNum;
var newRevId;
var revInfo;
var opts = {status: 'available'};
if (doc._deleted) {
opts.deleted = true;
}
if (newEdits) {
if (!doc._id) {
doc._id = uuid();
}
newRevId = rev();
if (doc._rev) {
revInfo = parseRevisionInfo(doc._rev);
if (revInfo.error) {
return revInfo;
}
doc._rev_tree = [{
pos: revInfo.prefix,
ids: [revInfo.id, {status: 'missing'}, [[newRevId, opts, []]]]
}];
nRevNum = revInfo.prefix + 1;
} else {
doc._rev_tree = [{
pos: 1,
ids : [newRevId, opts, []]
}];
nRevNum = 1;
}
} else {
if (doc._revisions) {
doc._rev_tree = makeRevTreeFromRevisions(doc._revisions, opts);
nRevNum = doc._revisions.start;
newRevId = doc._revisions.ids[0];
}
if (!doc._rev_tree) {
revInfo = parseRevisionInfo(doc._rev);
if (revInfo.error) {
return revInfo;
}
nRevNum = revInfo.prefix;
newRevId = revInfo.id;
doc._rev_tree = [{
pos: nRevNum,
ids: [newRevId, opts, []]
}];
}
}
invalidIdError(doc._id);
doc._rev = nRevNum + '-' + newRevId;
var result = {metadata : {}, data : {}};
for (var key in doc) {
/* istanbul ignore else */
if (Object.prototype.hasOwnProperty.call(doc, key)) {
var specialKey = key[0] === '_';
if (specialKey && !reservedWords[key]) {
var error = createError(DOC_VALIDATION, key);
error.message = DOC_VALIDATION.message + ': ' + key;
throw error;
} else if (specialKey && !dataWords[key]) {
result.metadata[key.slice(1)] = doc[key];
} else {
result.data[key] = doc[key];
}
}
}
return result;
}
function thisAtob(str) {
var base64 = new Buffer(str, 'base64');
// Node.js will just skip the characters it can't decode instead of
// throwing an exception
if (base64.toString('base64') !== str) {
throw new Error("attachment is not a valid base64 string");
}
return base64.toString('binary');
}
function thisBtoa(str) {
return bufferFrom(str, 'binary').toString('base64');
}
function typedBuffer(binString, buffType, type) {
// buffType is either 'binary' or 'base64'
var buff = bufferFrom(binString, buffType);
buff.type = type; // non-standard, but used for consistency with the browser
return buff;
}
function b64ToBluffer(b64, type) {
return typedBuffer(b64, 'base64', type);
}
// From http://stackoverflow.com/questions/14967647/ (continues on next line)
// encode-decode-image-with-base64-breaks-image (2013-04-21)
function binStringToBluffer(binString, type) {
return typedBuffer(binString, 'binary', type);
}
// This function is unused in Node
/* istanbul ignore next */
function blobToBase64(blobOrBuffer, callback) {
callback(blobOrBuffer.toString('base64'));
}
// not used in Node, but here for completeness
// simplified API. universal browser support is assumed
//Can't find original post, but this is close
//http://stackoverflow.com/questions/6965107/ (continues on next line)
//converting-between-strings-and-arraybuffers
function binaryMd5(data, callback) {
var base64 = crypto.createHash('md5').update(data, 'binary').digest('base64');
callback(base64);
}
function stringMd5(string) {
return crypto.createHash('md5').update(string, 'binary').digest('hex');
}
function updateDoc(revLimit, prev, docInfo, results,
i, cb, writeDoc, newEdits) {
if (revExists(prev.rev_tree, docInfo.metadata.rev)) {
results[i] = docInfo;
return cb();
}
// sometimes this is pre-calculated. historically not always
var previousWinningRev = prev.winningRev || winningRev(prev);
var previouslyDeleted = 'deleted' in prev ? prev.deleted :
isDeleted(prev, previousWinningRev);
var deleted = 'deleted' in docInfo.metadata ? docInfo.metadata.deleted :
isDeleted(docInfo.metadata);
var isRoot = /^1-/.test(docInfo.metadata.rev);
if (previouslyDeleted && !deleted && newEdits && isRoot) {
var newDoc = docInfo.data;
newDoc._rev = previousWinningRev;
newDoc._id = docInfo.metadata.id;
docInfo = parseDoc(newDoc, newEdits);
}
var merged = merge(prev.rev_tree, docInfo.metadata.rev_tree[0], revLimit);
var inConflict = newEdits && ((
(previouslyDeleted && deleted && merged.conflicts !== 'new_leaf') ||
(!previouslyDeleted && merged.conflicts !== 'new_leaf') ||
(previouslyDeleted && !deleted && merged.conflicts === 'new_branch')));
if (inConflict) {
var err = createError(REV_CONFLICT);
results[i] = err;
return cb();
}
var newRev = docInfo.metadata.rev;
docInfo.metadata.rev_tree = merged.tree;
docInfo.stemmedRevs = merged.stemmedRevs || [];
/* istanbul ignore else */
if (prev.rev_map) {
docInfo.metadata.rev_map = prev.rev_map; // used only by leveldb
}
// recalculate
var winningRev$$1 = winningRev(docInfo.metadata);
var winningRevIsDeleted = isDeleted(docInfo.metadata, winningRev$$1);
// calculate the total number of documents that were added/removed,
// from the perspective of total_rows/doc_count
var delta = (previouslyDeleted === winningRevIsDeleted) ? 0 :
previouslyDeleted < winningRevIsDeleted ? -1 : 1;
var newRevIsDeleted;
if (newRev === winningRev$$1) {
// if the new rev is the same as the winning rev, we can reuse that value
newRevIsDeleted = winningRevIsDeleted;
} else {
// if they're not the same, then we need to recalculate
newRevIsDeleted = isDeleted(docInfo.metadata, newRev);
}
writeDoc(docInfo, winningRev$$1, winningRevIsDeleted, newRevIsDeleted,
true, delta, i, cb);
}
function rootIsMissing(docInfo) {
return docInfo.metadata.rev_tree[0].ids[1].status === 'missing';
}
function processDocs(revLimit, docInfos, api, fetchedDocs, tx, results,
writeDoc, opts, overallCallback) {
// Default to 1000 locally
revLimit = revLimit || 1000;
function insertDoc(docInfo, resultsIdx, callback) {
// Cant insert new deleted documents
var winningRev$$1 = winningRev(docInfo.metadata);
var deleted = isDeleted(docInfo.metadata, winningRev$$1);
if ('was_delete' in opts && deleted) {
results[resultsIdx] = createError(MISSING_DOC, 'deleted');
return callback();
}
// 4712 - detect whether a new document was inserted with a _rev
var inConflict = newEdits && rootIsMissing(docInfo);
if (inConflict) {
var err = createError(REV_CONFLICT);
results[resultsIdx] = err;
return callback();
}
var delta = deleted ? 0 : 1;
writeDoc(docInfo, winningRev$$1, deleted, deleted, false,
delta, resultsIdx, callback);
}
var newEdits = opts.new_edits;
var idsToDocs = new ExportedMap();
var docsDone = 0;
var docsToDo = docInfos.length;
function checkAllDocsDone() {
if (++docsDone === docsToDo && overallCallback) {
overallCallback();
}
}
docInfos.forEach(function (currentDoc, resultsIdx) {
if (currentDoc._id && isLocalId(currentDoc._id)) {
var fun = currentDoc._deleted ? '_removeLocal' : '_putLocal';
api[fun](currentDoc, {ctx: tx}, function (err, res) {
results[resultsIdx] = err || res;
checkAllDocsDone();
});
return;
}
var id = currentDoc.metadata.id;
if (idsToDocs.has(id)) {
docsToDo--; // duplicate
idsToDocs.get(id).push([currentDoc, resultsIdx]);
} else {
idsToDocs.set(id, [[currentDoc, resultsIdx]]);
}
});
// in the case of new_edits, the user can provide multiple docs
// with the same id. these need to be processed sequentially
idsToDocs.forEach(function (docs, id) {
var numDone = 0;
function docWritten() {
if (++numDone < docs.length) {
nextDoc();
} else {
checkAllDocsDone();
}
}
function nextDoc() {
var value = docs[numDone];
var currentDoc = value[0];
var resultsIdx = value[1];
if (fetchedDocs.has(id)) {
updateDoc(revLimit, fetchedDocs.get(id), currentDoc, results,
resultsIdx, docWritten, writeDoc, newEdits);
} else {
// Ensure stemming applies to new writes as well
var merged = merge([], currentDoc.metadata.rev_tree[0], revLimit);
currentDoc.metadata.rev_tree = merged.tree;
currentDoc.stemmedRevs = merged.stemmedRevs || [];
insertDoc(currentDoc, resultsIdx, docWritten);
}
}
nextDoc();
});
}
function safeJsonParse(str) {
// This try/catch guards against stack overflow errors.
// JSON.parse() is faster than vuvuzela.parse() but vuvuzela
// cannot overflow.
try {
return JSON.parse(str);
} catch (e) {
/* istanbul ignore next */
return vuvuzela.parse(str);
}
}
function safeJsonStringify(json) {
try {
return JSON.stringify(json);
} catch (e) {
/* istanbul ignore next */
return vuvuzela.stringify(json);
}
}
function readAsBlobOrBuffer(storedObject, type) {
// In Node, we've stored a buffer
storedObject.type = type; // non-standard, but used for consistency
return storedObject;
}
// in Node, we store the buffer directly
function prepareAttachmentForStorage(attData, cb) {
cb(attData);
}
function createEmptyBlobOrBuffer(type) {
return typedBuffer('', 'binary', type);
}
// similar to an idb or websql transaction object
// designed to be passed around. basically just caches
// things in-memory and then does a big batch() operation
// when you're done
function getCacheFor(transaction, store) {
var prefix = store.prefix()[0];
var cache = transaction._cache;
var subCache = cache.get(prefix);
if (!subCache) {
subCache = new ExportedMap();
cache.set(prefix, subCache);
}
return subCache;
}
function LevelTransaction() {
this._batch = [];
this._cache = new ExportedMap();
}
LevelTransaction.prototype.get = function (store, key, callback) {
var cache = getCacheFor(this, store);
var exists = cache.get(key);
if (exists) {
return nextTick(function () {
callback(null, exists);
});
} else if (exists === null) { // deleted marker
/* istanbul ignore next */
return nextTick(function () {
callback({name: 'NotFoundError'});
});
}
store.get(key, function (err, res$$1) {
if (err) {
/* istanbul ignore else */
if (err.name === 'NotFoundError') {
cache.set(key, null);
}
return callback(err);
}
cache.set(key, res$$1);
callback(null, res$$1);
});
};
LevelTransaction.prototype.batch = function (batch) {
for (var i = 0, len = batch.length; i < len; i++) {
var operation = batch[i];
var cache = getCacheFor(this, operation.prefix);
if (operation.type === 'put') {
cache.set(operation.key, operation.value);
} else {
cache.set(operation.key, null);
}
}
this._batch = this._batch.concat(batch);
};
LevelTransaction.prototype.execute = function (db, callback) {
var keys = new ExportedSet();
var uniqBatches = [];
// remove duplicates; last one wins
for (var i = this._batch.length - 1; i >= 0; i--) {
var operation = this._batch[i];
var lookupKey = operation.prefix.prefix()[0] + '\xff' + operation.key;
if (keys.has(lookupKey)) {
continue;
}
keys.add(lookupKey);
uniqBatches.push(operation);
}
db.batch(uniqBatches, callback);
};
var DOC_STORE = 'document-store';
var BY_SEQ_STORE = 'by-sequence';
var ATTACHMENT_STORE = 'attach-store';
var BINARY_STORE = 'attach-binary-store';
var LOCAL_STORE = 'local-store';
var META_STORE = 'meta-store';
// leveldb barks if we try to open a db multiple times
// so we cache opened connections here for initstore()
var dbStores = new ExportedMap();
// store the value of update_seq in the by-sequence store the key name will
// never conflict, since the keys in the by-sequence store are integers
var UPDATE_SEQ_KEY = '_local_last_update_seq';
var DOC_COUNT_KEY = '_local_doc_count';
var UUID_KEY = '_local_uuid';
var MD5_PREFIX = 'md5-';
var safeJsonEncoding = {
encode: safeJsonStringify,
decode: safeJsonParse,
buffer: false,
type: 'cheap-json'
};
var levelChanges = new Changes();
// winningRev and deleted are performance-killers, but
// in newer versions of PouchDB, they are cached on the metadata
function getWinningRev(metadata) {
return 'winningRev' in metadata ?
metadata.winningRev : winningRev(metadata);
}
function getIsDeleted(metadata, winningRev$$1) {
return 'deleted' in metadata ?
metadata.deleted : isDeleted(metadata, winningRev$$1);
}
function fetchAttachment(att, stores, opts) {
var type = att.content_type;
return new PouchPromise$1(function (resolve, reject) {
stores.binaryStore.get(att.digest, function (err, buffer) {
var data;
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return reject(err);
} else {
// empty
if (!opts.binary) {
data = '';
} else {
data = binStringToBluffer('', type);
}
}
} else { // non-empty
if (opts.binary) {
data = readAsBlobOrBuffer(buffer, type);
} else {
data = buffer.toString('base64');
}
}
delete att.stub;
delete att.length;
att.data = data;
resolve();
});
});
}
function fetchAttachments(results, stores, opts) {
var atts = [];
results.forEach(function (row) {
if (!(row.doc && row.doc._attachments)) {
return;
}
var attNames = Object.keys(row.doc._attachments);
attNames.forEach(function (attName) {
var att = row.doc._attachments[attName];
if (!('data' in att)) {
atts.push(att);
}
});
});
return PouchPromise$1.all(atts.map(function (att) {
return fetchAttachment(att, stores, opts);
}));
}
function LevelPouch$1(opts, callback) {
opts = clone(opts);
var api = this;
var instanceId;
var stores = {};
var revLimit = opts.revs_limit;
var db;
var name = opts.name;
// TODO: this is undocumented and unused probably
/* istanbul ignore else */
if (typeof opts.createIfMissing === 'undefined') {
opts.createIfMissing = true;
}
var leveldown = opts.db;
var dbStore;
var leveldownName = functionName(leveldown);
if (dbStores.has(leveldownName)) {
dbStore = dbStores.get(leveldownName);
} else {
dbStore = new ExportedMap();
dbStores.set(leveldownName, dbStore);
}
if (dbStore.has(name)) {
db = dbStore.get(name);
afterDBCreated();
} else {
dbStore.set(name, sublevelPouch(levelup(name, opts, function (err) {
/* istanbul ignore if */
if (err) {
dbStore.delete(name);
return callback(err);
}
db = dbStore.get(name);
db._docCount = -1;
db._queue = new Deque();
/* istanbul ignore else */
if (typeof opts.migrate === 'object') { // migration for leveldown
opts.migrate.doMigrationOne(name, db, afterDBCreated);
} else {
afterDBCreated();
}
})));
}
function afterDBCreated() {
stores.docStore = db.sublevel(DOC_STORE, {valueEncoding: safeJsonEncoding});
stores.bySeqStore = db.sublevel(BY_SEQ_STORE, {valueEncoding: 'json'});
stores.attachmentStore =
db.sublevel(ATTACHMENT_STORE, {valueEncoding: 'json'});
stores.binaryStore = db.sublevel(BINARY_STORE, {valueEncoding: 'binary'});
stores.localStore = db.sublevel(LOCAL_STORE, {valueEncoding: 'json'});
stores.metaStore = db.sublevel(META_STORE, {valueEncoding: 'json'});
/* istanbul ignore else */
if (typeof opts.migrate === 'object') { // migration for leveldown
opts.migrate.doMigrationTwo(db, stores, afterLastMigration);
} else {
afterLastMigration();
}
}
function afterLastMigration() {
stores.metaStore.get(UPDATE_SEQ_KEY, function (err, value) {
if (typeof db._updateSeq === 'undefined') {
db._updateSeq = value || 0;
}
stores.metaStore.get(DOC_COUNT_KEY, function (err, value) {
db._docCount = !err ? value : 0;
stores.metaStore.get(UUID_KEY, function (err, value) {
instanceId = !err ? value : uuid();
stores.metaStore.put(UUID_KEY, instanceId, function () {
nextTick(function () {
callback(null, api);
});
});
});
});
});
}
function countDocs(callback) {
/* istanbul ignore if */
if (db.isClosed()) {
return callback(new Error('database is closed'));
}
return callback(null, db._docCount); // use cached value
}
api._remote = false;
/* istanbul ignore next */
api.type = function () {
return 'leveldb';
};
api._id = function (callback) {
callback(null, instanceId);
};
api._info = function (callback) {
var res$$1 = {
doc_count: db._docCount,
update_seq: db._updateSeq,
backend_adapter: functionName(leveldown)
};
return nextTick(function () {
callback(null, res$$1);
});
};
function tryCode(fun, args) {
try {
fun.apply(null, args);
} catch (err) {
args[args.length - 1](err);
}
}
function executeNext() {
var firstTask = db._queue.peekFront();
if (firstTask.type === 'read') {
runReadOperation(firstTask);
} else { // write, only do one at a time
runWriteOperation(firstTask);
}
}
function runReadOperation(firstTask) {
// do multiple reads at once simultaneously, because it's safe
var readTasks = [firstTask];
var i = 1;
var nextTask = db._queue.get(i);
while (typeof nextTask !== 'undefined' && nextTask.type === 'read') {
readTasks.push(nextTask);
i++;
nextTask = db._queue.get(i);
}
var numDone = 0;
readTasks.forEach(function (readTask) {
var args = readTask.args;
var callback = args[args.length - 1];
args[args.length - 1] = getArguments(function (cbArgs) {
callback.apply(null, cbArgs);
if (++numDone === readTasks.length) {
nextTick(function () {
// all read tasks have finished
readTasks.forEach(function () {
db._queue.shift();
});
if (db._queue.length) {
executeNext();
}
});
}
});
tryCode(readTask.fun, args);
});
}
function runWriteOperation(firstTask) {
var args = firstTask.args;
var callback = args[args.length - 1];
args[args.length - 1] = getArguments(function (cbArgs) {
callback.apply(null, cbArgs);
nextTick(function () {
db._queue.shift();
if (db._queue.length) {
executeNext();
}
});
});
tryCode(firstTask.fun, args);
}
// all read/write operations to the database are done in a queue,
// similar to how websql/idb works. this avoids problems such
// as e.g. compaction needing to have a lock on the database while
// it updates stuff. in the future we can revisit this.
function writeLock(fun) {
return getArguments(function (args) {
db._queue.push({
fun: fun,
args: args,
type: 'write'
});
if (db._queue.length === 1) {
nextTick(executeNext);
}
});
}
// same as the writelock, but multiple can run at once
function readLock(fun) {
return getArguments(function (args) {
db._queue.push({
fun: fun,
args: args,
type: 'read'
});
if (db._queue.length === 1) {
nextTick(executeNext);
}
});
}
function formatSeq(n) {
return ('0000000000000000' + n).slice(-16);
}
function parseSeq(s) {
return parseInt(s, 10);
}
api._get = readLock(function (id, opts, callback) {
opts = clone(opts);
stores.docStore.get(id, function (err, metadata) {
if (err || !metadata) {
return callback(createError(MISSING_DOC, 'missing'));
}
var rev$$1;
if (!opts.rev) {
rev$$1 = getWinningRev(metadata);
var deleted = getIsDeleted(metadata, rev$$1);
if (deleted) {
return callback(createError(MISSING_DOC, "deleted"));
}
} else {
rev$$1 = opts.latest ? latest(opts.rev, metadata) : opts.rev;
}
var seq = metadata.rev_map[rev$$1];
stores.bySeqStore.get(formatSeq(seq), function (err, doc) {
if (!doc) {
return callback(createError(MISSING_DOC));
}
/* istanbul ignore if */
if ('_id' in doc && doc._id !== metadata.id) {
// this failing implies something very wrong
return callback(new Error('wrong doc returned'));
}
doc._id = metadata.id;
if ('_rev' in doc) {
/* istanbul ignore if */
if (doc._rev !== rev$$1) {
// this failing implies something very wrong
return callback(new Error('wrong doc returned'));
}
} else {
// we didn't always store this
doc._rev = rev$$1;
}
return callback(null, {doc: doc, metadata: metadata});
});
});
});
// not technically part of the spec, but if putAttachment has its own
// method...
api._getAttachment = function (docId, attachId, attachment, opts, callback) {
var digest = attachment.digest;
var type = attachment.content_type;
stores.binaryStore.get(digest, function (err, attach) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return callback(err);
}
// Empty attachment
return callback(null, opts.binary ? createEmptyBlobOrBuffer(type) : '');
}
if (opts.binary) {
callback(null, readAsBlobOrBuffer(attach, type));
} else {
callback(null, attach.toString('base64'));
}
});
};
api._bulkDocs = writeLock(function (req, opts, callback) {
var newEdits = opts.new_edits;
var results = new Array(req.docs.length);
var fetchedDocs = new ExportedMap();
var stemmedRevs = new ExportedMap();
var txn = new LevelTransaction();
var docCountDelta = 0;
var newUpdateSeq = db._updateSeq;
// parse the docs and give each a sequence number
var userDocs = req.docs;
var docInfos = userDocs.map(function (doc) {
if (doc._id && isLocalId(doc._id)) {
return doc;
}
var newDoc = parseDoc(doc, newEdits);
if (newDoc.metadata && !newDoc.metadata.rev_map) {
newDoc.metadata.rev_map = {};
}
return newDoc;
});
var infoErrors = docInfos.filter(function (doc) {
return doc.error;
});
if (infoErrors.length) {
return callback(infoErrors[0]);
}
// verify any stub attachments as a precondition test
function verifyAttachment(digest, callback) {
txn.get(stores.attachmentStore, digest, function (levelErr) {
if (levelErr) {
var err = createError(MISSING_STUB,
'unknown stub attachment with digest ' +
digest);
callback(err);
} else {
callback();
}
});
}
function verifyAttachments(finish) {
var digests = [];
userDocs.forEach(function (doc) {
if (doc && doc._attachments) {
Object.keys(doc._attachments).forEach(function (filename) {
var att = doc._attachments[filename];
if (att.stub) {
digests.push(att.digest);
}
});
}
});
if (!digests.length) {
return finish();
}
var numDone = 0;
var err;
digests.forEach(function (digest) {
verifyAttachment(digest, function (attErr) {
if (attErr && !err) {
err = attErr;
}
if (++numDone === digests.length) {
finish(err);
}
});
});
}
function fetchExistingDocs(finish) {
var numDone = 0;
var overallErr;
function checkDone() {
if (++numDone === userDocs.length) {
return finish(overallErr);
}
}
userDocs.forEach(function (doc) {
if (doc._id && isLocalId(doc._id)) {
// skip local docs
return checkDone();
}
txn.get(stores.docStore, doc._id, function (err, info) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
overallErr = err;
}
} else {
fetchedDocs.set(doc._id, info);
}
checkDone();
});
});
}
function compact(revsMap, callback) {
var promise = PouchPromise$1.resolve();
revsMap.forEach(function (revs, docId) {
// TODO: parallelize, for now need to be sequential to
// pass orphaned attachment tests
promise = promise.then(function () {
return new PouchPromise$1(function (resolve, reject) {
api._doCompactionNoLock(docId, revs, {ctx: txn}, function (err) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
resolve();
});
});
});
});
promise.then(function () {
callback();
}, callback);
}
function autoCompact(callback) {
var revsMap = new ExportedMap();
fetchedDocs.forEach(function (metadata, docId) {
revsMap.set(docId, compactTree(metadata));
});
compact(revsMap, callback);
}
function finish() {
compact(stemmedRevs, function (error) {
/* istanbul ignore if */
if (error) {
complete(error);
}
if (api.auto_compaction) {
return autoCompact(complete);
}
complete();
});
}
function writeDoc(docInfo, winningRev$$1, winningRevIsDeleted, newRevIsDeleted,
isUpdate, delta, resultsIdx, callback2) {
docCountDelta += delta;
var err = null;
var recv = 0;
docInfo.metadata.winningRev = winningRev$$1;
docInfo.metadata.deleted = winningRevIsDeleted;
docInfo.data._id = docInfo.metadata.id;
docInfo.data._rev = docInfo.metadata.rev;
if (newRevIsDeleted) {
docInfo.data._deleted = true;
}
if (docInfo.stemmedRevs.length) {
stemmedRevs.set(docInfo.metadata.id, docInfo.stemmedRevs);
}
var attachments = docInfo.data._attachments ?
Object.keys(docInfo.data._attachments) :
[];
function attachmentSaved(attachmentErr) {
recv++;
if (!err) {
/* istanbul ignore if */
if (attachmentErr) {
err = attachmentErr;
callback2(err);
} else if (recv === attachments.length) {
finish();
}
}
}
function onMD5Load(doc, key, data, attachmentSaved) {
return function (result) {
saveAttachment(doc, MD5_PREFIX + result, key, data, attachmentSaved);
};
}
function doMD5(doc, key, attachmentSaved) {
return function (data) {
binaryMd5(data, onMD5Load(doc, key, data, attachmentSaved));
};
}
for (var i = 0; i < attachments.length; i++) {
var key = attachments[i];
var att = docInfo.data._attachments[key];
if (att.stub) {
// still need to update the refs mapping
var id = docInfo.data._id;
var rev$$1 = docInfo.data._rev;
saveAttachmentRefs(id, rev$$1, att.digest, attachmentSaved);
continue;
}
var data;
if (typeof att.data === 'string') {
// input is assumed to be a base64 string
try {
data = thisAtob(att.data);
} catch (e) {
callback(createError(BAD_ARG,
'Attachment is not a valid base64 string'));
return;
}
doMD5(docInfo, key, attachmentSaved)(data);
} else {
prepareAttachmentForStorage(att.data,
doMD5(docInfo, key, attachmentSaved));
}
}
function finish() {
var seq = docInfo.metadata.rev_map[docInfo.metadata.rev];
/* istanbul ignore if */
if (seq) {
// check that there aren't any existing revisions with the same
// revision id, else we shouldn't do anything
return callback2();
}
seq = ++newUpdateSeq;
docInfo.metadata.rev_map[docInfo.metadata.rev] =
docInfo.metadata.seq = seq;
var seqKey = formatSeq(seq);
var batch = [{
key: seqKey,
value: docInfo.data,
prefix: stores.bySeqStore,
type: 'put'
}, {
key: docInfo.metadata.id,
value: docInfo.metadata,
prefix: stores.docStore,
type: 'put'
}];
txn.batch(batch);
results[resultsIdx] = {
ok: true,
id: docInfo.metadata.id,
rev: docInfo.metadata.rev
};
fetchedDocs.set(docInfo.metadata.id, docInfo.metadata);
callback2();
}
if (!attachments.length) {
finish();
}
}
// attachments are queued per-digest, otherwise the refs could be
// overwritten by concurrent writes in the same bulkDocs session
var attachmentQueues = {};
function saveAttachmentRefs(id, rev$$1, digest, callback) {
function fetchAtt() {
return new PouchPromise$1(function (resolve, reject) {
txn.get(stores.attachmentStore, digest, function (err, oldAtt) {
/* istanbul ignore if */
if (err && err.name !== 'NotFoundError') {
return reject(err);
}
resolve(oldAtt);
});
});
}
function saveAtt(oldAtt) {
var ref = [id, rev$$1].join('@');
var newAtt = {};
if (oldAtt) {
if (oldAtt.refs) {
// only update references if this attachment already has them
// since we cannot migrate old style attachments here without
// doing a full db scan for references
newAtt.refs = oldAtt.refs;
newAtt.refs[ref] = true;
}
} else {
newAtt.refs = {};
newAtt.refs[ref] = true;
}
return new PouchPromise$1(function (resolve) {
txn.batch([{
type: 'put',
prefix: stores.attachmentStore,
key: digest,
value: newAtt
}]);
resolve(!oldAtt);
});
}
// put attachments in a per-digest queue, to avoid two docs with the same
// attachment overwriting each other
var queue = attachmentQueues[digest] || PouchPromise$1.resolve();
attachmentQueues[digest] = queue.then(function () {
return fetchAtt().then(saveAtt).then(function (isNewAttachment) {
callback(null, isNewAttachment);
}, callback);
});
}
function saveAttachment(docInfo, digest, key, data, callback) {
var att = docInfo.data._attachments[key];
delete att.data;
att.digest = digest;
att.length = data.length;
var id = docInfo.metadata.id;
var rev$$1 = docInfo.metadata.rev;
att.revpos = parseInt(rev$$1, 10);
saveAttachmentRefs(id, rev$$1, digest, function (err, isNewAttachment) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
// do not try to store empty attachments
if (data.length === 0) {
return callback(err);
}
if (!isNewAttachment) {
// small optimization - don't bother writing it again
return callback(err);
}
txn.batch([{
type: 'put',
prefix: stores.binaryStore,
key: digest,
value: bufferFrom(data, 'binary')
}]);
callback();
});
}
function complete(err) {
/* istanbul ignore if */
if (err) {
return nextTick(function () {
callback(err);
});
}
txn.batch([
{
prefix: stores.metaStore,
type: 'put',
key: UPDATE_SEQ_KEY,
value: newUpdateSeq
},
{
prefix: stores.metaStore,
type: 'put',
key: DOC_COUNT_KEY,
value: db._docCount + docCountDelta
}
]);
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
db._docCount += docCountDelta;
db._updateSeq = newUpdateSeq;
levelChanges.notify(name);
nextTick(function () {
callback(null, results);
});
});
}
if (!docInfos.length) {
return callback(null, []);
}
verifyAttachments(function (err) {
if (err) {
return callback(err);
}
fetchExistingDocs(function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
processDocs(revLimit, docInfos, api, fetchedDocs, txn, results,
writeDoc, opts, finish);
});
});
});
api._allDocs = readLock(function (opts, callback) {
opts = clone(opts);
countDocs(function (err, docCount) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var readstreamOpts = {};
var skip = opts.skip || 0;
if (opts.startkey) {
readstreamOpts.gte = opts.startkey;
}
if (opts.endkey) {
readstreamOpts.lte = opts.endkey;
}
if (opts.key) {
readstreamOpts.gte = readstreamOpts.lte = opts.key;
}
if (opts.descending) {
readstreamOpts.reverse = true;
// switch start and ends
var tmp = readstreamOpts.lte;
readstreamOpts.lte = readstreamOpts.gte;
readstreamOpts.gte = tmp;
}
var limit;
if (typeof opts.limit === 'number') {
limit = opts.limit;
}
if (limit === 0 ||
('start' in readstreamOpts && 'end' in readstreamOpts &&
readstreamOpts.start > readstreamOpts.end)) {
// should return 0 results when start is greater than end.
// normally level would "fix" this for us by reversing the order,
// so short-circuit instead
return callback(null, {
total_rows: docCount,
offset: opts.skip,
rows: []
});
}
var results = [];
var docstream = stores.docStore.readStream(readstreamOpts);
var throughStream = through2.obj(function (entry, _, next) {
var metadata = entry.value;
// winningRev and deleted are performance-killers, but
// in newer versions of PouchDB, they are cached on the metadata
var winningRev$$1 = getWinningRev(metadata);
var deleted = getIsDeleted(metadata, winningRev$$1);
if (!deleted) {
if (skip-- > 0) {
next();
return;
} else if (typeof limit === 'number' && limit-- <= 0) {
docstream.unpipe();
docstream.destroy();
next();
return;
}
} else if (opts.deleted !== 'ok') {
next();
return;
}
function allDocsInner(data) {
var doc = {
id: metadata.id,
key: metadata.id,
value: {
rev: winningRev$$1
}
};
if (opts.include_docs) {
doc.doc = data;
doc.doc._rev = doc.value.rev;
if (opts.conflicts) {
var conflicts = collectConflicts(metadata);
if (conflicts.length) {
doc.doc._conflicts = conflicts;
}
}
for (var att in doc.doc._attachments) {
if (doc.doc._attachments.hasOwnProperty(att)) {
doc.doc._attachments[att].stub = true;
}
}
}
if (opts.inclusive_end === false && metadata.id === opts.endkey) {
return next();
} else if (deleted) {
if (opts.deleted === 'ok') {
doc.value.deleted = true;
doc.doc = null;
} else {
/* istanbul ignore next */
return next();
}
}
results.push(doc);
next();
}
if (opts.include_docs) {
var seq = metadata.rev_map[winningRev$$1];
stores.bySeqStore.get(formatSeq(seq), function (err, data) {
allDocsInner(data);
});
}
else {
allDocsInner();
}
}, function (next) {
PouchPromise$1.resolve().then(function () {
if (opts.include_docs && opts.attachments) {
return fetchAttachments(results, stores, opts);
}
}).then(function () {
callback(null, {
total_rows: docCount,
offset: opts.skip,
rows: results
});
}, callback);
next();
}).on('unpipe', function () {
throughStream.end();
});
docstream.on('error', callback);
docstream.pipe(throughStream);
});
});
api._changes = function (opts) {
opts = clone(opts);
if (opts.continuous) {
var id = name + ':' + uuid();
levelChanges.addListener(name, id, api, opts);
levelChanges.notify(name);
return {
cancel: function () {
levelChanges.removeListener(name, id);
}
};
}
var descending = opts.descending;
var results = [];
var lastSeq = opts.since || 0;
var called = 0;
var streamOpts = {
reverse: descending
};
var limit;
if ('limit' in opts && opts.limit > 0) {
limit = opts.limit;
}
if (!streamOpts.reverse) {
streamOpts.start = formatSeq(opts.since || 0);
}
var docIds = opts.doc_ids && new ExportedSet(opts.doc_ids);
var filter = filterChange(opts);
var docIdsToMetadata = new ExportedMap();
var returnDocs;
if ('return_docs' in opts) {
returnDocs = opts.return_docs;
} else if ('returnDocs' in opts) {
// TODO: Remove 'returnDocs' in favor of 'return_docs' in a future release
returnDocs = opts.returnDocs;
} else {
returnDocs = true;
}
function complete() {
opts.done = true;
if (returnDocs && opts.limit) {
/* istanbul ignore if */
if (opts.limit < results.length) {
results.length = opts.limit;
}
}
changeStream.unpipe(throughStream);
changeStream.destroy();
if (!opts.continuous && !opts.cancelled) {
if (opts.include_docs && opts.attachments) {
fetchAttachments(results, stores, opts).then(function () {
opts.complete(null, {results: results, last_seq: lastSeq});
});
} else {
opts.complete(null, {results: results, last_seq: lastSeq});
}
}
}
var changeStream = stores.bySeqStore.readStream(streamOpts);
var throughStream = through2.obj(function (data, _, next) {
if (limit && called >= limit) {
complete();
return next();
}
if (opts.cancelled || opts.done) {
return next();
}
var seq = parseSeq(data.key);
var doc = data.value;
if (seq === opts.since && !descending) {
// couchdb ignores `since` if descending=true
return next();
}
if (docIds && !docIds.has(doc._id)) {
return next();
}
var metadata;
function onGetMetadata(metadata) {
var winningRev$$1 = getWinningRev(metadata);
function onGetWinningDoc(winningDoc) {
var change = opts.processChange(winningDoc, metadata, opts);
change.seq = metadata.seq;
var filtered = filter(change);
if (typeof filtered === 'object') {
return opts.complete(filtered);
}
if (filtered) {
called++;
if (opts.attachments && opts.include_docs) {
// fetch attachment immediately for the benefit
// of live listeners
fetchAttachments([change], stores, opts).then(function () {
opts.onChange(change);
});
} else {
opts.onChange(change);
}
if (returnDocs) {
results.push(change);
}
}
next();
}
if (metadata.seq !== seq) {
// some other seq is later
return next();
}
lastSeq = seq;
if (winningRev$$1 === doc._rev) {
return onGetWinningDoc(doc);
}
// fetch the winner
var winningSeq = metadata.rev_map[winningRev$$1];
stores.bySeqStore.get(formatSeq(winningSeq), function (err, doc) {
onGetWinningDoc(doc);
});
}
metadata = docIdsToMetadata.get(doc._id);
if (metadata) { // cached
return onGetMetadata(metadata);
}
// metadata not cached, have to go fetch it
stores.docStore.get(doc._id, function (err, metadata) {
/* istanbul ignore if */
if (opts.cancelled || opts.done || db.isClosed() ||
isLocalId(metadata.id)) {
return next();
}
docIdsToMetadata.set(doc._id, metadata);
onGetMetadata(metadata);
});
}, function (next) {
if (opts.cancelled) {
return next();
}
if (returnDocs && opts.limit) {
/* istanbul ignore if */
if (opts.limit < results.length) {
results.length = opts.limit;
}
}
next();
}).on('unpipe', function () {
throughStream.end();
complete();
});
changeStream.pipe(throughStream);
return {
cancel: function () {
opts.cancelled = true;
complete();
}
};
};
api._close = function (callback) {
/* istanbul ignore if */
if (db.isClosed()) {
return callback(createError(NOT_OPEN));
}
db.close(function (err) {
/* istanbul ignore if */
if (err) {
callback(err);
} else {
dbStore.delete(name);
callback();
}
});
};
api._getRevisionTree = function (docId, callback) {
stores.docStore.get(docId, function (err, metadata) {
if (err) {
callback(createError(MISSING_DOC));
} else {
callback(null, metadata.rev_tree);
}
});
};
api._doCompaction = writeLock(function (docId, revs, opts, callback) {
api._doCompactionNoLock(docId, revs, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._doCompactionNoLock = function (docId, revs, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (!revs.length) {
return callback();
}
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.docStore, docId, function (err, metadata) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var seqs = revs.map(function (rev$$1) {
var seq = metadata.rev_map[rev$$1];
delete metadata.rev_map[rev$$1];
return seq;
});
traverseRevTree(metadata.rev_tree, function (isLeaf, pos,
revHash, ctx, opts) {
var rev$$1 = pos + '-' + revHash;
if (revs.indexOf(rev$$1) !== -1) {
opts.status = 'missing';
}
});
var batch = [];
batch.push({
key: metadata.id,
value: metadata,
type: 'put',
prefix: stores.docStore
});
var digestMap = {};
var numDone = 0;
var overallErr;
function checkDone(err) {
/* istanbul ignore if */
if (err) {
overallErr = err;
}
if (++numDone === revs.length) { // done
/* istanbul ignore if */
if (overallErr) {
return callback(overallErr);
}
deleteOrphanedAttachments();
}
}
function finish(err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
txn.batch(batch);
if (opts.ctx) {
// don't execute immediately
return callback();
}
txn.execute(db, callback);
}
function deleteOrphanedAttachments() {
var possiblyOrphanedAttachments = Object.keys(digestMap);
if (!possiblyOrphanedAttachments.length) {
return finish();
}
var numDone = 0;
var overallErr;
function checkDone(err) {
/* istanbul ignore if */
if (err) {
overallErr = err;
}
if (++numDone === possiblyOrphanedAttachments.length) {
finish(overallErr);
}
}
var refsToDelete = new ExportedMap();
revs.forEach(function (rev$$1) {
refsToDelete.set(docId + '@' + rev$$1, true);
});
possiblyOrphanedAttachments.forEach(function (digest) {
txn.get(stores.attachmentStore, digest, function (err, attData) {
/* istanbul ignore if */
if (err) {
if (err.name === 'NotFoundError') {
return checkDone();
} else {
return checkDone(err);
}
}
var refs = Object.keys(attData.refs || {}).filter(function (ref) {
return !refsToDelete.has(ref);
});
var newRefs = {};
refs.forEach(function (ref) {
newRefs[ref] = true;
});
if (refs.length) { // not orphaned
batch.push({
key: digest,
type: 'put',
value: {refs: newRefs},
prefix: stores.attachmentStore
});
} else { // orphaned, can safely delete
batch = batch.concat([{
key: digest,
type: 'del',
prefix: stores.attachmentStore
}, {
key: digest,
type: 'del',
prefix: stores.binaryStore
}]);
}
checkDone();
});
});
}
seqs.forEach(function (seq) {
batch.push({
key: formatSeq(seq),
type: 'del',
prefix: stores.bySeqStore
});
txn.get(stores.bySeqStore, formatSeq(seq), function (err, doc) {
/* istanbul ignore if */
if (err) {
if (err.name === 'NotFoundError') {
return checkDone();
} else {
return checkDone(err);
}
}
var atts = Object.keys(doc._attachments || {});
atts.forEach(function (attName) {
var digest = doc._attachments[attName].digest;
digestMap[digest] = true;
});
checkDone();
});
});
});
};
api._getLocal = function (id, callback) {
stores.localStore.get(id, function (err, doc) {
if (err) {
callback(createError(MISSING_DOC));
} else {
callback(null, doc);
}
});
};
api._putLocal = function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (opts.ctx) {
api._putLocalNoLock(doc, opts, callback);
} else {
api._putLocalWithLock(doc, opts, callback);
}
};
api._putLocalWithLock = writeLock(function (doc, opts, callback) {
api._putLocalNoLock(doc, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._putLocalNoLock = function (doc, opts, callback) {
delete doc._revisions; // ignore this, trust the rev
var oldRev = doc._rev;
var id = doc._id;
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.localStore, id, function (err, resp) {
if (err && oldRev) {
return callback(createError(REV_CONFLICT));
}
if (resp && resp._rev !== oldRev) {
return callback(createError(REV_CONFLICT));
}
doc._rev =
oldRev ? '0-' + (parseInt(oldRev.split('-')[1], 10) + 1) : '0-1';
var batch = [
{
type: 'put',
prefix: stores.localStore,
key: id,
value: doc
}
];
txn.batch(batch);
var ret = {ok: true, id: doc._id, rev: doc._rev};
if (opts.ctx) {
// don't execute immediately
return callback(null, ret);
}
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
callback(null, ret);
});
});
};
api._removeLocal = function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (opts.ctx) {
api._removeLocalNoLock(doc, opts, callback);
} else {
api._removeLocalWithLock(doc, opts, callback);
}
};
api._removeLocalWithLock = writeLock(function (doc, opts, callback) {
api._removeLocalNoLock(doc, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._removeLocalNoLock = function (doc, opts, callback) {
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.localStore, doc._id, function (err, resp) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return callback(err);
} else {
return callback(createError(MISSING_DOC));
}
}
if (resp._rev !== doc._rev) {
return callback(createError(REV_CONFLICT));
}
txn.batch([{
prefix: stores.localStore,
type: 'del',
key: doc._id
}]);
var ret = {ok: true, id: doc._id, rev: '0-0'};
if (opts.ctx) {
// don't execute immediately
return callback(null, ret);
}
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
callback(null, ret);
});
});
};
// close and delete open leveldb stores
api._destroy = function (opts, callback) {
var dbStore;
var leveldownName = functionName(leveldown);
/* istanbul ignore else */
if (dbStores.has(leveldownName)) {
dbStore = dbStores.get(leveldownName);
} else {
return callDestroy(name, callback);
}
/* istanbul ignore else */
if (dbStore.has(name)) {
levelChanges.removeAllListeners(name);
dbStore.get(name).close(function () {
dbStore.delete(name);
callDestroy(name, callback);
});
} else {
callDestroy(name, callback);
}
};
function callDestroy(name, cb) {
leveldown.destroy(name, cb);
}
}
// require leveldown. provide verbose output on error as it is the default
// nodejs adapter, which we do not provide for the user
/* istanbul ignore next */
var requireLeveldown = function () {
try {
return require('leveldown');
} catch (err) {
/* eslint no-ex-assign: 0*/
err = err || 'leveldown import error';
if (err.code === 'MODULE_NOT_FOUND') {
// handle leveldown not installed case
return new Error([
'the \'leveldown\' package is not available. install it, or,',
'specify another storage backend using the \'db\' option'
].join(' '));
} else if (err.message && err.message.match('Module version mismatch')) {
// handle common user enviornment error
return new Error([
err.message,
'This generally implies that leveldown was built with a different',
'version of node than that which is running now. You may try',
'fully removing and reinstalling PouchDB or leveldown to resolve.'
].join(' '));
}
// handle general internal nodejs require error
return new Error(err.toString() + ': unable to import leveldown');
}
};
var stores = [
'document-store',
'by-sequence',
'attach-store',
'attach-binary-store'
];
function formatSeq(n) {
return ('0000000000000000' + n).slice(-16);
}
var UPDATE_SEQ_KEY$1 = '_local_last_update_seq';
var DOC_COUNT_KEY$1 = '_local_doc_count';
var UUID_KEY$1 = '_local_uuid';
var doMigrationOne = function (name, db, callback) {
// local require to prevent crashing if leveldown isn't installed.
var leveldown = require("leveldown");
var base = path.resolve(name);
function move(store, index, cb) {
var storePath = path.join(base, store);
var opts;
if (index === 3) {
opts = {
valueEncoding: 'binary'
};
} else {
opts = {
valueEncoding: 'json'
};
}
var sub = db.sublevel(store, opts);
var orig = levelup(storePath, opts);
var from = orig.createReadStream();
var writeStream = new LevelWriteStream(sub);
var to = writeStream();
from.on('end', function () {
orig.close(function (err) {
cb(err, storePath);
});
});
from.pipe(to);
}
fs.unlink(base + '.uuid', function (err) {
if (err) {
return callback();
}
var todo = 4;
var done = [];
stores.forEach(function (store, i) {
move(store, i, function (err, storePath) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
done.push(storePath);
if (!(--todo)) {
done.forEach(function (item) {
leveldown.destroy(item, function () {
if (++todo === done.length) {
fs.rmdir(base, callback);
}
});
});
}
});
});
});
};
var doMigrationTwo = function (db, stores, callback) {
var batches = [];
stores.bySeqStore.get(UUID_KEY$1, function (err, value) {
if (err) {
// no uuid key, so don't need to migrate;
return callback();
}
batches.push({
key: UUID_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: UUID_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
stores.bySeqStore.get(DOC_COUNT_KEY$1, function (err, value) {
if (value) {
// if no doc count key,
// just skip
// we can live with this
batches.push({
key: DOC_COUNT_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: DOC_COUNT_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
}
stores.bySeqStore.get(UPDATE_SEQ_KEY$1, function (err, value) {
if (value) {
// if no UPDATE_SEQ_KEY
// just skip
// we've gone to far to stop.
batches.push({
key: UPDATE_SEQ_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: UPDATE_SEQ_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
}
var deletedSeqs = {};
stores.docStore.createReadStream({
startKey: '_',
endKey: '_\xFF'
}).pipe(through2.obj(function (ch, _, next) {
if (!isLocalId(ch.key)) {
return next();
}
batches.push({
key: ch.key,
prefix: stores.docStore,
type: 'del'
});
var winner = winningRev(ch.value);
Object.keys(ch.value.rev_map).forEach(function (key) {
if (key !== 'winner') {
this.push(formatSeq(ch.value.rev_map[key]));
}
}, this);
var winningSeq = ch.value.rev_map[winner];
stores.bySeqStore.get(formatSeq(winningSeq), function (err, value) {
if (!err) {
batches.push({
key: ch.key,
value: value,
prefix: stores.localStore,
type: 'put',
valueEncoding: 'json'
});
}
next();
});
})).pipe(through2.obj(function (seq, _, next) {
/* istanbul ignore if */
if (deletedSeqs[seq]) {
return next();
}
deletedSeqs[seq] = true;
stores.bySeqStore.get(seq, function (err, resp) {
/* istanbul ignore if */
if (err || !isLocalId(resp._id)) {
return next();
}
batches.push({
key: seq,
prefix: stores.bySeqStore,
type: 'del'
});
next();
});
}, function () {
db.batch(batches, callback);
}));
});
});
});
};
var migrate = {
doMigrationOne: doMigrationOne,
doMigrationTwo: doMigrationTwo
};
function LevelDownPouch(opts, callback) {
// Users can pass in their own leveldown alternative here, in which case
// it overrides the default one. (This is in addition to the custom builds.)
var leveldown = opts.db;
/* istanbul ignore else */
if (!leveldown) {
leveldown = requireLeveldown();
/* istanbul ignore if */
if (leveldown instanceof Error) {
return callback(leveldown);
}
}
var _opts = $inject_Object_assign({
db: leveldown,
migrate: migrate
}, opts);
LevelPouch$1.call(this, _opts, callback);
}
// overrides for normal LevelDB behavior on Node
LevelDownPouch.valid = function () {
return true;
};
LevelDownPouch.use_prefix = false;
var LevelPouch = function (PouchDB) {
PouchDB.adapter('leveldb', LevelDownPouch, true);
};
// May seem redundant, but this is to allow switching with
// request-browser.js.
var request = require('request');
// non-standard, but we do this to mimic blobs in the browser
function applyTypeToBuffer(buffer, resp) {
buffer.type = resp.headers['content-type'];
}
function defaultBody() {
return bufferFrom('', 'binary');
}
function ajaxCore$1(options, callback) {
options = clone(options);
var defaultOptions = {
method : "GET",
headers: {},
json: true,
processData: true,
timeout: 10000,
cache: false
};
options = $inject_Object_assign(defaultOptions, options);
function onSuccess(obj$$1, resp, cb) {
if (!options.binary && options.json && typeof obj$$1 === 'string') {
/* istanbul ignore next */
try {
obj$$1 = JSON.parse(obj$$1);
} catch (e) {
// Probably a malformed JSON from server
return cb(e);
}
}
if (Array.isArray(obj$$1)) {
obj$$1 = obj$$1.map(function (v) {
if (v.error || v.missing) {
return generateErrorFromResponse(v);
} else {
return v;
}
});
}
if (options.binary) {
applyTypeToBuffer(obj$$1, resp);
}
cb(null, obj$$1, resp);
}
if (options.json) {
if (!options.binary) {
options.headers.Accept = 'application/json';
}
options.headers['Content-Type'] = options.headers['Content-Type'] ||
'application/json';
}
if (options.binary) {
options.encoding = null;
options.json = false;
}
if (!options.processData) {
options.json = false;
}
return request(options, function (err, response, body) {
if (err) {
return callback(generateErrorFromResponse(err));
}
var error;
var content_type = response.headers && response.headers['content-type'];
var data = body || defaultBody();
// CouchDB doesn't always return the right content-type for JSON data, so
// we check for ^{ and }$ (ignoring leading/trailing whitespace)
if (!options.binary && (options.json || !options.processData) &&
typeof data !== 'object' &&
(/json/.test(content_type) ||
(/^[\s]*\{/.test(data) && /\}[\s]*$/.test(data)))) {
try {
data = JSON.parse(data.toString());
} catch (e) {}
}
if (response.statusCode >= 200 && response.statusCode < 300) {
onSuccess(data, response, callback);
} else {
error = generateErrorFromResponse(data);
error.status = response.statusCode;
callback(error);
}
});
}
function ajax(opts, callback) {
// do nothing; all the action is in prerequest-browser.js
return ajaxCore$1(opts, callback);
}
// dead simple promise pool, inspired by https://github.com/timdp/es6-promise-pool
// but much smaller in code size. limits the number of concurrent promises that are executed
function pool(promiseFactories, limit) {
return new PouchPromise$1(function (resolve, reject) {
var running = 0;
var current = 0;
var done = 0;
var len = promiseFactories.length;
var err;
function runNext() {
running++;
promiseFactories[current++]().then(onSuccess, onError);
}
function doNext() {
if (++done === len) {
/* istanbul ignore if */
if (err) {
reject(err);
} else {
resolve();
}
} else {
runNextBatch();
}
}
function onSuccess() {
running--;
doNext();
}
/* istanbul ignore next */
function onError(thisErr) {
running--;
err = err || thisErr;
doNext();
}
function runNextBatch() {
while (running < limit && current < len) {
runNext();
}
}
runNextBatch();
});
}
var CHANGES_BATCH_SIZE = 25;
var MAX_SIMULTANEOUS_REVS = 50;
var CHANGES_TIMEOUT_BUFFER = 5000;
var DEFAULT_HEARTBEAT = 10000;
var supportsBulkGetMap = {};
function readAttachmentsAsBlobOrBuffer(row) {
var atts = row.doc && row.doc._attachments;
if (!atts) {
return;
}
Object.keys(atts).forEach(function (filename) {
var att = atts[filename];
att.data = b64ToBluffer(att.data, att.content_type);
});
}
function encodeDocId(id) {
if (/^_design/.test(id)) {
return '_design/' + encodeURIComponent(id.slice(8));
}
if (/^_local/.test(id)) {
return '_local/' + encodeURIComponent(id.slice(7));
}
return encodeURIComponent(id);
}
function preprocessAttachments$2(doc) {
if (!doc._attachments || !Object.keys(doc._attachments)) {
return PouchPromise$1.resolve();
}
return PouchPromise$1.all(Object.keys(doc._attachments).map(function (key) {
var attachment = doc._attachments[key];
if (attachment.data && typeof attachment.data !== 'string') {
return new PouchPromise$1(function (resolve) {
blobToBase64(attachment.data, resolve);
}).then(function (b64) {
attachment.data = b64;
});
}
}));
}
function hasUrlPrefix(opts) {
if (!opts.prefix) {
return false;
}
var protocol = parseUri(opts.prefix).protocol;
return protocol === 'http' || protocol === 'https';
}
// Get all the information you possibly can about the URI given by name and
// return it as a suitable object.
function getHost(name, opts) {
// encode db name if opts.prefix is a url (#5574)
if (hasUrlPrefix(opts)) {
var dbName = opts.name.substr(opts.prefix.length);
name = opts.prefix + encodeURIComponent(dbName);
}
// Prase the URI into all its little bits
var uri = parseUri(name);
// Store the user and password as a separate auth object
if (uri.user || uri.password) {
uri.auth = {username: uri.user, password: uri.password};
}
// Split the path part of the URI into parts using '/' as the delimiter
// after removing any leading '/' and any trailing '/'
var parts = uri.path.replace(/(^\/|\/$)/g, '').split('/');
// Store the first part as the database name and remove it from the parts
// array
uri.db = parts.pop();
// Prevent double encoding of URI component
if (uri.db.indexOf('%') === -1) {
uri.db = encodeURIComponent(uri.db);
}
// Restore the path by joining all the remaining parts (all the parts
// except for the database name) with '/'s
uri.path = parts.join('/');
return uri;
}
// Generate a URL with the host data given by opts and the given path
function genDBUrl(opts, path$$1) {
return genUrl(opts, opts.db + '/' + path$$1);
}
// Generate a URL with the host data given by opts and the given path
function genUrl(opts, path$$1) {
// If the host already has a path, then we need to have a path delimiter
// Otherwise, the path delimiter is the empty string
var pathDel = !opts.path ? '' : '/';
// If the host already has a path, then we need to have a path delimiter
// Otherwise, the path delimiter is the empty string
return opts.protocol + '://' + opts.host +
(opts.port ? (':' + opts.port) : '') +
'/' + opts.path + pathDel + path$$1;
}
function paramsToStr(params) {
return '?' + Object.keys(params).map(function (k) {
return k + '=' + encodeURIComponent(params[k]);
}).join('&');
}
// Implements the PouchDB API for dealing with CouchDB instances over HTTP
function HttpPouch(opts, callback) {
// The functions that will be publicly available for HttpPouch
var api = this;
var host = getHost(opts.name, opts);
var dbUrl = genDBUrl(host, '');
opts = clone(opts);
var ajaxOpts = opts.ajax || {};
if (opts.auth || host.auth) {
var nAuth = opts.auth || host.auth;
var str = nAuth.username + ':' + nAuth.password;
var token = thisBtoa(unescape(encodeURIComponent(str)));
ajaxOpts.headers = ajaxOpts.headers || {};
ajaxOpts.headers.Authorization = 'Basic ' + token;
}
// Not strictly necessary, but we do this because numerous tests
// rely on swapping ajax in and out.
api._ajax = ajax;
function ajax$$1(userOpts, options, callback) {
var reqAjax = userOpts.ajax || {};
var reqOpts = $inject_Object_assign(clone(ajaxOpts), reqAjax, options);
var defaultHeaders = clone(ajaxOpts.headers || {});
reqOpts.headers = $inject_Object_assign(defaultHeaders, reqAjax.headers,
options.headers || {});
/* istanbul ignore if */
if (api.constructor.listeners('debug').length) {
api.constructor.emit('debug', ['http', reqOpts.method, reqOpts.url]);
}
return api._ajax(reqOpts, callback);
}
function ajaxPromise(userOpts, opts) {
return new PouchPromise$1(function (resolve, reject) {
ajax$$1(userOpts, opts, function (err, res$$1) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
resolve(res$$1);
});
});
}
function adapterFun$$1(name, fun) {
return adapterFun(name, getArguments(function (args) {
setup().then(function () {
return fun.apply(this, args);
}).catch(function (e) {
var callback = args.pop();
callback(e);
});
}));
}
var setupPromise;
function setup() {
// TODO: Remove `skipSetup` in favor of `skip_setup` in a future release
if (opts.skipSetup || opts.skip_setup) {
return PouchPromise$1.resolve();
}
// If there is a setup in process or previous successful setup
// done then we will use that
// If previous setups have been rejected we will try again
if (setupPromise) {
return setupPromise;
}
var checkExists = {method: 'GET', url: dbUrl};
setupPromise = ajaxPromise({}, checkExists).catch(function (err) {
if (err && err.status && err.status === 404) {
// Doesnt exist, create it
res(404, 'PouchDB is just detecting if the remote exists.');
return ajaxPromise({}, {method: 'PUT', url: dbUrl});
} else {
return PouchPromise$1.reject(err);
}
}).catch(function (err) {
// If we try to create a database that already exists, skipped in
// istanbul since its catching a race condition.
/* istanbul ignore if */
if (err && err.status && err.status === 412) {
return true;
}
return PouchPromise$1.reject(err);
});
setupPromise.catch(function () {
setupPromise = null;
});
return setupPromise;
}
nextTick(function () {
callback(null, api);
});
api._remote = true;
/* istanbul ignore next */
api.type = function () {
return 'http';
};
api.id = adapterFun$$1('id', function (callback) {
ajax$$1({}, {method: 'GET', url: genUrl(host, '')}, function (err, result) {
var uuid$$1 = (result && result.uuid) ?
(result.uuid + host.db) : genDBUrl(host, '');
callback(null, uuid$$1);
});
});
api.request = adapterFun$$1('request', function (options, callback) {
options.url = genDBUrl(host, options.url);
ajax$$1({}, options, callback);
});
// Sends a POST request to the host calling the couchdb _compact function
// version: The version of CouchDB it is running
api.compact = adapterFun$$1('compact', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
ajax$$1(opts, {
url: genDBUrl(host, '_compact'),
method: 'POST'
}, function () {
function ping() {
api.info(function (err, res$$1) {
// CouchDB may send a "compact_running:true" if it's
// already compacting. PouchDB Server doesn't.
/* istanbul ignore else */
if (res$$1 && !res$$1.compact_running) {
callback(null, {ok: true});
} else {
setTimeout(ping, opts.interval || 200);
}
});
}
// Ping the http if it's finished compaction
ping();
});
});
api.bulkGet = adapterFun('bulkGet', function (opts, callback) {
var self = this;
function doBulkGet(cb) {
var params = {};
if (opts.revs) {
params.revs = true;
}
if (opts.attachments) {
/* istanbul ignore next */
params.attachments = true;
}
if (opts.latest) {
params.latest = true;
}
ajax$$1(opts, {
url: genDBUrl(host, '_bulk_get' + paramsToStr(params)),
method: 'POST',
body: { docs: opts.docs}
}, cb);
}
/* istanbul ignore next */
function doBulkGetShim() {
// avoid "url too long error" by splitting up into multiple requests
var batchSize = MAX_SIMULTANEOUS_REVS;
var numBatches = Math.ceil(opts.docs.length / batchSize);
var numDone = 0;
var results = new Array(numBatches);
function onResult(batchNum) {
return function (err, res$$1) {
// err is impossible because shim returns a list of errs in that case
results[batchNum] = res$$1.results;
if (++numDone === numBatches) {
callback(null, {results: flatten(results)});
}
};
}
for (var i = 0; i < numBatches; i++) {
var subOpts = pick(opts, ['revs', 'attachments', 'latest']);
subOpts.ajax = ajaxOpts;
subOpts.docs = opts.docs.slice(i * batchSize,
Math.min(opts.docs.length, (i + 1) * batchSize));
bulkGet(self, subOpts, onResult(i));
}
}
// mark the whole database as either supporting or not supporting _bulk_get
var dbUrl = genUrl(host, '');
var supportsBulkGet = supportsBulkGetMap[dbUrl];
/* istanbul ignore next */
if (typeof supportsBulkGet !== 'boolean') {
// check if this database supports _bulk_get
doBulkGet(function (err, res$$1) {
if (err) {
supportsBulkGetMap[dbUrl] = false;
res(
err.status,
'PouchDB is just detecting if the remote ' +
'supports the _bulk_get API.'
);
doBulkGetShim();
} else {
supportsBulkGetMap[dbUrl] = true;
callback(null, res$$1);
}
});
} else if (supportsBulkGet) {
doBulkGet(callback);
} else {
doBulkGetShim();
}
});
// Calls GET on the host, which gets back a JSON string containing
// couchdb: A welcome string
// version: The version of CouchDB it is running
api._info = function (callback) {
setup().then(function () {
ajax$$1({}, {
method: 'GET',
url: genDBUrl(host, '')
}, function (err, res$$1) {
/* istanbul ignore next */
if (err) {
return callback(err);
}
res$$1.host = genDBUrl(host, '');
callback(null, res$$1);
});
}).catch(callback);
};
// Get the document with the given id from the database given by host.
// The id could be solely the _id in the database, or it may be a
// _design/ID or _local/ID path
api.get = adapterFun$$1('get', function (id, opts, callback) {
// If no options were given, set the callback to the second parameter
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
// List of parameters to add to the GET request
var params = {};
if (opts.revs) {
params.revs = true;
}
if (opts.revs_info) {
params.revs_info = true;
}
if (opts.latest) {
params.latest = true;
}
if (opts.open_revs) {
if (opts.open_revs !== "all") {
opts.open_revs = JSON.stringify(opts.open_revs);
}
params.open_revs = opts.open_revs;
}
if (opts.rev) {
params.rev = opts.rev;
}
if (opts.conflicts) {
params.conflicts = opts.conflicts;
}
id = encodeDocId(id);
// Set the options for the ajax call
var options = {
method: 'GET',
url: genDBUrl(host, id + paramsToStr(params))
};
function fetchAttachments(doc) {
var atts = doc._attachments;
var filenames = atts && Object.keys(atts);
if (!atts || !filenames.length) {
return;
}
// we fetch these manually in separate XHRs, because
// Sync Gateway would normally send it back as multipart/mixed,
// which we cannot parse. Also, this is more efficient than
// receiving attachments as base64-encoded strings.
function fetch(filename) {
var att = atts[filename];
var path$$1 = encodeDocId(doc._id) + '/' + encodeAttachmentId(filename) +
'?rev=' + doc._rev;
return ajaxPromise(opts, {
method: 'GET',
url: genDBUrl(host, path$$1),
binary: true
}).then(function (blob) {
if (opts.binary) {
return blob;
}
return new PouchPromise$1(function (resolve) {
blobToBase64(blob, resolve);
});
}).then(function (data) {
delete att.stub;
delete att.length;
att.data = data;
});
}
var promiseFactories = filenames.map(function (filename) {
return function () {
return fetch(filename);
};
});
// This limits the number of parallel xhr requests to 5 any time
// to avoid issues with maximum browser request limits
return pool(promiseFactories, 5);
}
function fetchAllAttachments(docOrDocs) {
if (Array.isArray(docOrDocs)) {
return PouchPromise$1.all(docOrDocs.map(function (doc) {
if (doc.ok) {
return fetchAttachments(doc.ok);
}
}));
}
return fetchAttachments(docOrDocs);
}
ajaxPromise(opts, options).then(function (res$$1) {
return PouchPromise$1.resolve().then(function () {
if (opts.attachments) {
return fetchAllAttachments(res$$1);
}
}).then(function () {
callback(null, res$$1);
});
}).catch(function (e) {
e.docId = id;
callback(e);
});
});
// Delete the document given by doc from the database given by host.
api.remove = adapterFun$$1('remove',
function (docOrId, optsOrRev, opts, callback) {
var doc;
if (typeof optsOrRev === 'string') {
// id, rev, opts, callback style
doc = {
_id: docOrId,
_rev: optsOrRev
};
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
} else {
// doc, opts, callback style
doc = docOrId;
if (typeof optsOrRev === 'function') {
callback = optsOrRev;
opts = {};
} else {
callback = opts;
opts = optsOrRev;
}
}
var rev$$1 = (doc._rev || opts.rev);
// Delete the document
ajax$$1(opts, {
method: 'DELETE',
url: genDBUrl(host, encodeDocId(doc._id)) + '?rev=' + rev$$1
}, callback);
});
function encodeAttachmentId(attachmentId) {
return attachmentId.split("/").map(encodeURIComponent).join("/");
}
// Get the attachment
api.getAttachment =
adapterFun$$1('getAttachment', function (docId, attachmentId, opts,
callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var params = opts.rev ? ('?rev=' + opts.rev) : '';
var url = genDBUrl(host, encodeDocId(docId)) + '/' +
encodeAttachmentId(attachmentId) + params;
ajax$$1(opts, {
method: 'GET',
url: url,
binary: true
}, callback);
});
// Remove the attachment given by the id and rev
api.removeAttachment =
adapterFun$$1('removeAttachment', function (docId, attachmentId, rev$$1,
callback) {
var url = genDBUrl(host, encodeDocId(docId) + '/' +
encodeAttachmentId(attachmentId)) + '?rev=' + rev$$1;
ajax$$1({}, {
method: 'DELETE',
url: url
}, callback);
});
// Add the attachment given by blob and its contentType property
// to the document with the given id, the revision given by rev, and
// add it to the database given by host.
api.putAttachment =
adapterFun$$1('putAttachment', function (docId, attachmentId, rev$$1, blob,
type, callback) {
if (typeof type === 'function') {
callback = type;
type = blob;
blob = rev$$1;
rev$$1 = null;
}
var id = encodeDocId(docId) + '/' + encodeAttachmentId(attachmentId);
var url = genDBUrl(host, id);
if (rev$$1) {
url += '?rev=' + rev$$1;
}
if (typeof blob === 'string') {
// input is assumed to be a base64 string
var binary;
try {
binary = thisAtob(blob);
} catch (err) {
return callback(createError(BAD_ARG,
'Attachment is not a valid base64 string'));
}
blob = binary ? binStringToBluffer(binary, type) : '';
}
var opts = {
headers: {'Content-Type': type},
method: 'PUT',
url: url,
processData: false,
body: blob,
timeout: ajaxOpts.timeout || 60000
};
// Add the attachment
ajax$$1({}, opts, callback);
});
// Update/create multiple documents given by req in the database
// given by host.
api._bulkDocs = function (req, opts, callback) {
// If new_edits=false then it prevents the database from creating
// new revision numbers for the documents. Instead it just uses
// the old ones. This is used in database replication.
req.new_edits = opts.new_edits;
setup().then(function () {
return PouchPromise$1.all(req.docs.map(preprocessAttachments$2));
}).then(function () {
// Update/create the documents
ajax$$1(opts, {
method: 'POST',
url: genDBUrl(host, '_bulk_docs'),
timeout: opts.timeout,
body: req
}, function (err, results) {
if (err) {
return callback(err);
}
results.forEach(function (result) {
result.ok = true; // smooths out cloudant not adding this
});
callback(null, results);
});
}).catch(callback);
};
// Update/create document
api._put = function (doc, opts, callback) {
setup().then(function () {
return preprocessAttachments$2(doc);
}).then(function () {
// Update/create the document
ajax$$1(opts, {
method: 'PUT',
url: genDBUrl(host, encodeDocId(doc._id)),
body: doc
}, function (err, result) {
if (err) {
err.docId = doc && doc._id;
return callback(err);
}
callback(null, result);
});
}).catch(callback);
};
// Get a listing of the documents in the database given
// by host and ordered by increasing id.
api.allDocs = adapterFun$$1('allDocs', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
// List of parameters to add to the GET request
var params = {};
var body;
var method = 'GET';
if (opts.conflicts) {
params.conflicts = true;
}
if (opts.descending) {
params.descending = true;
}
if (opts.include_docs) {
params.include_docs = true;
}
// added in CouchDB 1.6.0
if (opts.attachments) {
params.attachments = true;
}
if (opts.key) {
params.key = JSON.stringify(opts.key);
}
if (opts.start_key) {
opts.startkey = opts.start_key;
}
if (opts.startkey) {
params.startkey = JSON.stringify(opts.startkey);
}
if (opts.end_key) {
opts.endkey = opts.end_key;
}
if (opts.endkey) {
params.endkey = JSON.stringify(opts.endkey);
}
if (typeof opts.inclusive_end !== 'undefined') {
params.inclusive_end = !!opts.inclusive_end;
}
if (typeof opts.limit !== 'undefined') {
params.limit = opts.limit;
}
if (typeof opts.skip !== 'undefined') {
params.skip = opts.skip;
}
var paramStr = paramsToStr(params);
if (typeof opts.keys !== 'undefined') {
method = 'POST';
body = {keys: opts.keys};
}
// Get the document listing
ajaxPromise(opts, {
method: method,
url: genDBUrl(host, '_all_docs' + paramStr),
body: body
}).then(function (res$$1) {
if (opts.include_docs && opts.attachments && opts.binary) {
res$$1.rows.forEach(readAttachmentsAsBlobOrBuffer);
}
callback(null, res$$1);
}).catch(callback);
});
// Get a list of changes made to documents in the database given by host.
// TODO According to the README, there should be two other methods here,
// api.changes.addListener and api.changes.removeListener.
api._changes = function (opts) {
// We internally page the results of a changes request, this means
// if there is a large set of changes to be returned we can start
// processing them quicker instead of waiting on the entire
// set of changes to return and attempting to process them at once
var batchSize = 'batch_size' in opts ? opts.batch_size : CHANGES_BATCH_SIZE;
opts = clone(opts);
if (opts.continuous && !('heartbeat' in opts)) {
opts.heartbeat = DEFAULT_HEARTBEAT;
}
var requestTimeout = ('timeout' in opts) ? opts.timeout :
('timeout' in ajaxOpts) ? ajaxOpts.timeout :
30 * 1000;
// ensure CHANGES_TIMEOUT_BUFFER applies
if ('timeout' in opts && opts.timeout &&
(requestTimeout - opts.timeout) < CHANGES_TIMEOUT_BUFFER) {
requestTimeout = opts.timeout + CHANGES_TIMEOUT_BUFFER;
}
if ('heartbeat' in opts && opts.heartbeat &&
(requestTimeout - opts.heartbeat) < CHANGES_TIMEOUT_BUFFER) {
requestTimeout = opts.heartbeat + CHANGES_TIMEOUT_BUFFER;
}
var params = {};
if ('timeout' in opts && opts.timeout) {
params.timeout = opts.timeout;
}
var limit = (typeof opts.limit !== 'undefined') ? opts.limit : false;
var returnDocs;
if ('return_docs' in opts) {
returnDocs = opts.return_docs;
} else if ('returnDocs' in opts) {
// TODO: Remove 'returnDocs' in favor of 'return_docs' in a future release
returnDocs = opts.returnDocs;
} else {
returnDocs = true;
}
//
var leftToFetch = limit;
if (opts.style) {
params.style = opts.style;
}
if (opts.include_docs || opts.filter && typeof opts.filter === 'function') {
params.include_docs = true;
}
if (opts.attachments) {
params.attachments = true;
}
if (opts.continuous) {
params.feed = 'longpoll';
}
if (opts.conflicts) {
params.conflicts = true;
}
if (opts.descending) {
params.descending = true;
}
if ('heartbeat' in opts) {
// If the heartbeat value is false, it disables the default heartbeat
if (opts.heartbeat) {
params.heartbeat = opts.heartbeat;
}
}
if (opts.filter && typeof opts.filter === 'string') {
params.filter = opts.filter;
}
if (opts.view && typeof opts.view === 'string') {
params.filter = '_view';
params.view = opts.view;
}
// If opts.query_params exists, pass it through to the changes request.
// These parameters may be used by the filter on the source database.
if (opts.query_params && typeof opts.query_params === 'object') {
for (var param_name in opts.query_params) {
/* istanbul ignore else */
if (opts.query_params.hasOwnProperty(param_name)) {
params[param_name] = opts.query_params[param_name];
}
}
}
var method = 'GET';
var body;
if (opts.doc_ids) {
// set this automagically for the user; it's annoying that couchdb
// requires both a "filter" and a "doc_ids" param.
params.filter = '_doc_ids';
method = 'POST';
body = {doc_ids: opts.doc_ids };
}
/* istanbul ignore next */
else if (opts.selector) {
// set this automagically for the user, similar to above
params.filter = '_selector';
method = 'POST';
body = {selector: opts.selector };
}
var xhr;
var lastFetchedSeq;
// Get all the changes starting wtih the one immediately after the
// sequence number given by since.
var fetch = function (since, callback) {
if (opts.aborted) {
return;
}
params.since = since;
// "since" can be any kind of json object in Coudant/CouchDB 2.x
/* istanbul ignore next */
if (typeof params.since === "object") {
params.since = JSON.stringify(params.since);
}
if (opts.descending) {
if (limit) {
params.limit = leftToFetch;
}
} else {
params.limit = (!limit || leftToFetch > batchSize) ?
batchSize : leftToFetch;
}
// Set the options for the ajax call
var xhrOpts = {
method: method,
url: genDBUrl(host, '_changes' + paramsToStr(params)),
timeout: requestTimeout,
body: body
};
lastFetchedSeq = since;
/* istanbul ignore if */
if (opts.aborted) {
return;
}
// Get the changes
setup().then(function () {
xhr = ajax$$1(opts, xhrOpts, callback);
}).catch(callback);
};
// If opts.since exists, get all the changes from the sequence
// number given by opts.since. Otherwise, get all the changes
// from the sequence number 0.
var results = {results: []};
var fetched = function (err, res$$1) {
if (opts.aborted) {
return;
}
var raw_results_length = 0;
// If the result of the ajax call (res) contains changes (res.results)
if (res$$1 && res$$1.results) {
raw_results_length = res$$1.results.length;
results.last_seq = res$$1.last_seq;
// For each change
var req = {};
req.query = opts.query_params;
res$$1.results = res$$1.results.filter(function (c) {
leftToFetch--;
var ret = filterChange(opts)(c);
if (ret) {
if (opts.include_docs && opts.attachments && opts.binary) {
readAttachmentsAsBlobOrBuffer(c);
}
if (returnDocs) {
results.results.push(c);
}
opts.onChange(c);
}
return ret;
});
} else if (err) {
// In case of an error, stop listening for changes and call
// opts.complete
opts.aborted = true;
opts.complete(err);
return;
}
// The changes feed may have timed out with no results
// if so reuse last update sequence
if (res$$1 && res$$1.last_seq) {
lastFetchedSeq = res$$1.last_seq;
}
var finished = (limit && leftToFetch <= 0) ||
(res$$1 && raw_results_length < batchSize) ||
(opts.descending);
if ((opts.continuous && !(limit && leftToFetch <= 0)) || !finished) {
// Queue a call to fetch again with the newest sequence number
nextTick(function () { fetch(lastFetchedSeq, fetched); });
} else {
// We're done, call the callback
opts.complete(null, results);
}
};
fetch(opts.since || 0, fetched);
// Return a method to cancel this method from processing any more
return {
cancel: function () {
opts.aborted = true;
if (xhr) {
xhr.abort();
}
}
};
};
// Given a set of document/revision IDs (given by req), tets the subset of
// those that do NOT correspond to revisions stored in the database.
// See http://wiki.apache.org/couchdb/HttpPostRevsDiff
api.revsDiff = adapterFun$$1('revsDiff', function (req, opts, callback) {
// If no options were given, set the callback to be the second parameter
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
// Get the missing document/revision IDs
ajax$$1(opts, {
method: 'POST',
url: genDBUrl(host, '_revs_diff'),
body: req
}, callback);
});
api._close = function (callback) {
callback();
};
api._destroy = function (options, callback) {
ajax$$1(options, {
url: genDBUrl(host, ''),
method: 'DELETE'
}, function (err, resp) {
if (err && err.status && err.status !== 404) {
return callback(err);
}
callback(null, resp);
});
};
}
// HttpPouch is a valid adapter.
HttpPouch.valid = function () {
return true;
};
var HttpPouch$1 = function (PouchDB) {
PouchDB.adapter('http', HttpPouch, false);
PouchDB.adapter('https', HttpPouch, false);
};
function QueryParseError(message) {
this.status = 400;
this.name = 'query_parse_error';
this.message = message;
this.error = true;
try {
Error.captureStackTrace(this, QueryParseError);
} catch (e) {}
}
inherits(QueryParseError, Error);
function NotFoundError$2(message) {
this.status = 404;
this.name = 'not_found';
this.message = message;
this.error = true;
try {
Error.captureStackTrace(this, NotFoundError$2);
} catch (e) {}
}
inherits(NotFoundError$2, Error);
function BuiltInError(message) {
this.status = 500;
this.name = 'invalid_value';
this.message = message;
this.error = true;
try {
Error.captureStackTrace(this, BuiltInError);
} catch (e) {}
}
inherits(BuiltInError, Error);
function promisedCallback(promise, callback) {
if (callback) {
promise.then(function (res$$1) {
nextTick(function () {
callback(null, res$$1);
});
}, function (reason) {
nextTick(function () {
callback(reason);
});
});
}
return promise;
}
function callbackify(fun) {
return getArguments(function (args) {
var cb = args.pop();
var promise = fun.apply(this, args);
if (typeof cb === 'function') {
promisedCallback(promise, cb);
}
return promise;
});
}
// Promise finally util similar to Q.finally
function fin(promise, finalPromiseFactory) {
return promise.then(function (res$$1) {
return finalPromiseFactory().then(function () {
return res$$1;
});
}, function (reason) {
return finalPromiseFactory().then(function () {
throw reason;
});
});
}
function sequentialize(queue, promiseFactory) {
return function () {
var args = arguments;
var that = this;
return queue.add(function () {
return promiseFactory.apply(that, args);
});
};
}
// uniq an array of strings, order not guaranteed
// similar to underscore/lodash _.uniq
function uniq(arr) {
var theSet = new ExportedSet(arr);
var result = new Array(theSet.size);
var index = -1;
theSet.forEach(function (value) {
result[++index] = value;
});
return result;
}
function mapToKeysArray(map) {
var result = new Array(map.size);
var index = -1;
map.forEach(function (value, key) {
result[++index] = key;
});
return result;
}
function createBuiltInError(name) {
var message = 'builtin ' + name +
' function requires map values to be numbers' +
' or number arrays';
return new BuiltInError(message);
}
function sum(values) {
var result = 0;
for (var i = 0, len = values.length; i < len; i++) {
var num = values[i];
if (typeof num !== 'number') {
if (Array.isArray(num)) {
// lists of numbers are also allowed, sum them separately
result = typeof result === 'number' ? [result] : result;
for (var j = 0, jLen = num.length; j < jLen; j++) {
var jNum = num[j];
if (typeof jNum !== 'number') {
throw createBuiltInError('_sum');
} else if (typeof result[j] === 'undefined') {
result.push(jNum);
} else {
result[j] += jNum;
}
}
} else { // not array/number
throw createBuiltInError('_sum');
}
} else if (typeof result === 'number') {
result += num;
} else { // add number to array
result[0] += num;
}
}
return result;
}
// Inside of 'vm' for Node, we need a way to translate a pseudo-error
// back into a real error once it's out of the VM.
function createBuiltInErrorInVm(name) {
return {
builtInError: true,
name: name
};
}
function convertToTrueError(err) {
return createBuiltInError(err.name);
}
function isBuiltInError(obj$$1) {
return obj$$1 && obj$$1.builtInError;
}
// All of this vm hullaballoo is to be able to run arbitrary code in a sandbox
// for security reasons.
function evalFunctionInVm(func, emit) {
return function (arg1, arg2, arg3) {
var code = '(function() {"use strict";' +
'var createBuiltInError = ' + createBuiltInErrorInVm.toString() + ';' +
'var sum = ' + sum.toString() + ';' +
'var log = function () {};' +
'var isArray = Array.isArray;' +
'var toJSON = JSON.parse;' +
'var __emitteds__ = [];' +
'var emit = function (key, value) {__emitteds__.push([key, value]);};' +
'var __result__ = (' +
func.replace(/;\s*$/, '') + ')' + '(' +
JSON.stringify(arg1) + ',' +
JSON.stringify(arg2) + ',' +
JSON.stringify(arg3) + ');' +
'return {result: __result__, emitteds: __emitteds__};' +
'})()';
var output = vm.runInNewContext(code);
output.emitteds.forEach(function (emitted) {
emit(emitted[0], emitted[1]);
});
if (isBuiltInError(output.result)) {
output.result = convertToTrueError(output.result);
}
return output.result;
};
}
var log = guardedConsole.bind(null, 'log');
// The "stringify, then execute in a VM" strategy totally breaks Istanbul due
// to missing __coverage global objects. As a solution, export different
// code during coverage testing and during regular execution.
// Note that this doesn't get shipped to consumers because Rollup replaces it
// with rollup-plugin-replace, so false is replaced with `false`
var evalFunc;
/* istanbul ignore else */
{
evalFunc = evalFunctionInVm;
}
var evalFunction = evalFunc;
/*
* Simple task queue to sequentialize actions. Assumes
* callbacks will eventually fire (once).
*/
function TaskQueue$2() {
this.promise = new PouchPromise$1(function (fulfill) {fulfill(); });
}
TaskQueue$2.prototype.add = function (promiseFactory) {
this.promise = this.promise.catch(function () {
// just recover
}).then(function () {
return promiseFactory();
});
return this.promise;
};
TaskQueue$2.prototype.finish = function () {
return this.promise;
};
function stringify(input) {
if (!input) {
return 'undefined'; // backwards compat for empty reduce
}
// for backwards compat with mapreduce, functions/strings are stringified
// as-is. everything else is JSON-stringified.
switch (typeof input) {
case 'function':
// e.g. a mapreduce map
return input.toString();
case 'string':
// e.g. a mapreduce built-in _reduce function
return input.toString();
default:
// e.g. a JSON object in the case of mango queries
return JSON.stringify(input);
}
}
/* create a string signature for a view so we can cache it and uniq it */
function createViewSignature(mapFun, reduceFun) {
// the "undefined" part is for backwards compatibility
return stringify(mapFun) + stringify(reduceFun) + 'undefined';
}
function createView(sourceDB, viewName, mapFun, reduceFun, temporary, localDocName) {
var viewSignature = createViewSignature(mapFun, reduceFun);
var cachedViews;
if (!temporary) {
// cache this to ensure we don't try to update the same view twice
cachedViews = sourceDB._cachedViews = sourceDB._cachedViews || {};
if (cachedViews[viewSignature]) {
return cachedViews[viewSignature];
}
}
var promiseForView = sourceDB.info().then(function (info) {
var depDbName = info.db_name + '-mrview-' +
(temporary ? 'temp' : stringMd5(viewSignature));
// save the view name in the source db so it can be cleaned up if necessary
// (e.g. when the _design doc is deleted, remove all associated view data)
function diffFunction(doc) {
doc.views = doc.views || {};
var fullViewName = viewName;
if (fullViewName.indexOf('/') === -1) {
fullViewName = viewName + '/' + viewName;
}
var depDbs = doc.views[fullViewName] = doc.views[fullViewName] || {};
/* istanbul ignore if */
if (depDbs[depDbName]) {
return; // no update necessary
}
depDbs[depDbName] = true;
return doc;
}
return upsert(sourceDB, '_local/' + localDocName, diffFunction).then(function () {
return sourceDB.registerDependentDatabase(depDbName).then(function (res$$1) {
var db = res$$1.db;
db.auto_compaction = true;
var view = {
name: depDbName,
db: db,
sourceDB: sourceDB,
adapter: sourceDB.adapter,
mapFun: mapFun,
reduceFun: reduceFun
};
return view.db.get('_local/lastSeq').catch(function (err) {
/* istanbul ignore if */
if (err.status !== 404) {
throw err;
}
}).then(function (lastSeqDoc) {
view.seq = lastSeqDoc ? lastSeqDoc.seq : 0;
if (cachedViews) {
view.db.once('destroyed', function () {
delete cachedViews[viewSignature];
});
}
return view;
});
});
});
});
if (cachedViews) {
cachedViews[viewSignature] = promiseForView;
}
return promiseForView;
}
var persistentQueues = {};
var tempViewQueue = new TaskQueue$2();
var CHANGES_BATCH_SIZE$1 = 50;
function parseViewName(name) {
// can be either 'ddocname/viewname' or just 'viewname'
// (where the ddoc name is the same)
return name.indexOf('/') === -1 ? [name, name] : name.split('/');
}
function isGenOne(changes) {
// only return true if the current change is 1-
// and there are no other leafs
return changes.length === 1 && /^1-/.test(changes[0].rev);
}
function emitError(db, e) {
try {
db.emit('error', e);
} catch (err) {
guardedConsole('error',
'The user\'s map/reduce function threw an uncaught error.\n' +
'You can debug this error by doing:\n' +
'myDatabase.on(\'error\', function (err) { debugger; });\n' +
'Please double-check your map/reduce function.');
guardedConsole('error', e);
}
}
/**
* Returns an "abstract" mapreduce object of the form:
*
* {
* query: queryFun,
* viewCleanup: viewCleanupFun
* }
*
* Arguments are:
*
* localDoc: string
* This is for the local doc that gets saved in order to track the
* "dependent" DBs and clean them up for viewCleanup. It should be
* unique, so that indexer plugins don't collide with each other.
* mapper: function (mapFunDef, emit)
* Returns a map function based on the mapFunDef, which in the case of
* normal map/reduce is just the de-stringified function, but may be
* something else, such as an object in the case of pouchdb-find.
* reducer: function (reduceFunDef)
* Ditto, but for reducing. Modules don't have to support reducing
* (e.g. pouchdb-find).
* ddocValidator: function (ddoc, viewName)
* Throws an error if the ddoc or viewName is not valid.
* This could be a way to communicate to the user that the configuration for the
* indexer is invalid.
*/
function createAbstractMapReduce(localDocName, mapper, reducer, ddocValidator) {
function tryMap(db, fun, doc) {
// emit an event if there was an error thrown by a map function.
// putting try/catches in a single function also avoids deoptimizations.
try {
fun(doc);
} catch (e) {
emitError(db, e);
}
}
function tryReduce(db, fun, keys, values, rereduce) {
// same as above, but returning the result or an error. there are two separate
// functions to avoid extra memory allocations since the tryCode() case is used
// for custom map functions (common) vs this function, which is only used for
// custom reduce functions (rare)
try {
return {output : fun(keys, values, rereduce)};
} catch (e) {
emitError(db, e);
return {error: e};
}
}
function sortByKeyThenValue(x, y) {
var keyCompare = collate(x.key, y.key);
return keyCompare !== 0 ? keyCompare : collate(x.value, y.value);
}
function sliceResults(results, limit, skip) {
skip = skip || 0;
if (typeof limit === 'number') {
return results.slice(skip, limit + skip);
} else if (skip > 0) {
return results.slice(skip);
}
return results;
}
function rowToDocId(row) {
var val = row.value;
// Users can explicitly specify a joined doc _id, or it
// defaults to the doc _id that emitted the key/value.
var docId = (val && typeof val === 'object' && val._id) || row.id;
return docId;
}
function readAttachmentsAsBlobOrBuffer(res$$1) {
res$$1.rows.forEach(function (row) {
var atts = row.doc && row.doc._attachments;
if (!atts) {
return;
}
Object.keys(atts).forEach(function (filename) {
var att = atts[filename];
atts[filename].data = b64ToBluffer(att.data, att.content_type);
});
});
}
function postprocessAttachments(opts) {
return function (res$$1) {
if (opts.include_docs && opts.attachments && opts.binary) {
readAttachmentsAsBlobOrBuffer(res$$1);
}
return res$$1;
};
}
function addHttpParam(paramName, opts, params, asJson) {
// add an http param from opts to params, optionally json-encoded
var val = opts[paramName];
if (typeof val !== 'undefined') {
if (asJson) {
val = encodeURIComponent(JSON.stringify(val));
}
params.push(paramName + '=' + val);
}
}
function coerceInteger(integerCandidate) {
if (typeof integerCandidate !== 'undefined') {
var asNumber = Number(integerCandidate);
// prevents e.g. '1foo' or '1.1' being coerced to 1
if (!isNaN(asNumber) && asNumber === parseInt(integerCandidate, 10)) {
return asNumber;
} else {
return integerCandidate;
}
}
}
function coerceOptions(opts) {
opts.group_level = coerceInteger(opts.group_level);
opts.limit = coerceInteger(opts.limit);
opts.skip = coerceInteger(opts.skip);
return opts;
}
function checkPositiveInteger(number) {
if (number) {
if (typeof number !== 'number') {
return new QueryParseError('Invalid value for integer: "' +
number + '"');
}
if (number < 0) {
return new QueryParseError('Invalid value for positive integer: ' +
'"' + number + '"');
}
}
}
function checkQueryParseError(options, fun) {
var startkeyName = options.descending ? 'endkey' : 'startkey';
var endkeyName = options.descending ? 'startkey' : 'endkey';
if (typeof options[startkeyName] !== 'undefined' &&
typeof options[endkeyName] !== 'undefined' &&
collate(options[startkeyName], options[endkeyName]) > 0) {
throw new QueryParseError('No rows can match your key range, ' +
'reverse your start_key and end_key or set {descending : true}');
} else if (fun.reduce && options.reduce !== false) {
if (options.include_docs) {
throw new QueryParseError('{include_docs:true} is invalid for reduce');
} else if (options.keys && options.keys.length > 1 &&
!options.group && !options.group_level) {
throw new QueryParseError('Multi-key fetches for reduce views must use ' +
'{group: true}');
}
}
['group_level', 'limit', 'skip'].forEach(function (optionName) {
var error = checkPositiveInteger(options[optionName]);
if (error) {
throw error;
}
});
}
function httpQuery(db, fun, opts) {
// List of parameters to add to the PUT request
var params = [];
var body;
var method = 'GET';
// If opts.reduce exists and is defined, then add it to the list
// of parameters.
// If reduce=false then the results are that of only the map function
// not the final result of map and reduce.
addHttpParam('reduce', opts, params);
addHttpParam('include_docs', opts, params);
addHttpParam('attachments', opts, params);
addHttpParam('limit', opts, params);
addHttpParam('descending', opts, params);
addHttpParam('group', opts, params);
addHttpParam('group_level', opts, params);
addHttpParam('skip', opts, params);
addHttpParam('stale', opts, params);
addHttpParam('conflicts', opts, params);
addHttpParam('startkey', opts, params, true);
addHttpParam('start_key', opts, params, true);
addHttpParam('endkey', opts, params, true);
addHttpParam('end_key', opts, params, true);
addHttpParam('inclusive_end', opts, params);
addHttpParam('key', opts, params, true);
// Format the list of parameters into a valid URI query string
params = params.join('&');
params = params === '' ? '' : '?' + params;
// If keys are supplied, issue a POST to circumvent GET query string limits
// see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options
if (typeof opts.keys !== 'undefined') {
var MAX_URL_LENGTH = 2000;
// according to http://stackoverflow.com/a/417184/680742,
// the de facto URL length limit is 2000 characters
var keysAsString =
'keys=' + encodeURIComponent(JSON.stringify(opts.keys));
if (keysAsString.length + params.length + 1 <= MAX_URL_LENGTH) {
// If the keys are short enough, do a GET. we do this to work around
// Safari not understanding 304s on POSTs (see pouchdb/pouchdb#1239)
params += (params[0] === '?' ? '&' : '?') + keysAsString;
} else {
method = 'POST';
if (typeof fun === 'string') {
body = {keys: opts.keys};
} else { // fun is {map : mapfun}, so append to this
fun.keys = opts.keys;
}
}
}
// We are referencing a query defined in the design doc
if (typeof fun === 'string') {
var parts = parseViewName(fun);
return db.request({
method: method,
url: '_design/' + parts[0] + '/_view/' + parts[1] + params,
body: body
}).then(
/* istanbul ignore next */
function (result) {
// fail the entire request if the result contains an error
result.rows.forEach(function (row) {
if (row.value && row.value.error && row.value.error === "builtin_reduce_error") {
throw new Error(row.reason);
}
});
return result;
})
.then(postprocessAttachments(opts));
}
// We are using a temporary view, terrible for performance, good for testing
body = body || {};
Object.keys(fun).forEach(function (key) {
if (Array.isArray(fun[key])) {
body[key] = fun[key];
} else {
body[key] = fun[key].toString();
}
});
return db.request({
method: 'POST',
url: '_temp_view' + params,
body: body
}).then(postprocessAttachments(opts));
}
// custom adapters can define their own api._query
// and override the default behavior
/* istanbul ignore next */
function customQuery(db, fun, opts) {
return new PouchPromise$1(function (resolve, reject) {
db._query(fun, opts, function (err, res$$1) {
if (err) {
return reject(err);
}
resolve(res$$1);
});
});
}
// custom adapters can define their own api._viewCleanup
// and override the default behavior
/* istanbul ignore next */
function customViewCleanup(db) {
return new PouchPromise$1(function (resolve, reject) {
db._viewCleanup(function (err, res$$1) {
if (err) {
return reject(err);
}
resolve(res$$1);
});
});
}
function defaultsTo(value) {
return function (reason) {
/* istanbul ignore else */
if (reason.status === 404) {
return value;
} else {
throw reason;
}
};
}
// returns a promise for a list of docs to update, based on the input docId.
// the order doesn't matter, because post-3.2.0, bulkDocs
// is an atomic operation in all three adapters.
function getDocsToPersist(docId, view, docIdsToChangesAndEmits) {
var metaDocId = '_local/doc_' + docId;
var defaultMetaDoc = {_id: metaDocId, keys: []};
var docData = docIdsToChangesAndEmits.get(docId);
var indexableKeysToKeyValues = docData[0];
var changes = docData[1];
function getMetaDoc() {
if (isGenOne(changes)) {
// generation 1, so we can safely assume initial state
// for performance reasons (avoids unnecessary GETs)
return PouchPromise$1.resolve(defaultMetaDoc);
}
return view.db.get(metaDocId).catch(defaultsTo(defaultMetaDoc));
}
function getKeyValueDocs(metaDoc) {
if (!metaDoc.keys.length) {
// no keys, no need for a lookup
return PouchPromise$1.resolve({rows: []});
}
return view.db.allDocs({
keys: metaDoc.keys,
include_docs: true
});
}
function processKeyValueDocs(metaDoc, kvDocsRes) {
var kvDocs = [];
var oldKeys = new ExportedSet();
for (var i = 0, len = kvDocsRes.rows.length; i < len; i++) {
var row = kvDocsRes.rows[i];
var doc = row.doc;
if (!doc) { // deleted
continue;
}
kvDocs.push(doc);
oldKeys.add(doc._id);
doc._deleted = !indexableKeysToKeyValues.has(doc._id);
if (!doc._deleted) {
var keyValue = indexableKeysToKeyValues.get(doc._id);
if ('value' in keyValue) {
doc.value = keyValue.value;
}
}
}
var newKeys = mapToKeysArray(indexableKeysToKeyValues);
newKeys.forEach(function (key) {
if (!oldKeys.has(key)) {
// new doc
var kvDoc = {
_id: key
};
var keyValue = indexableKeysToKeyValues.get(key);
if ('value' in keyValue) {
kvDoc.value = keyValue.value;
}
kvDocs.push(kvDoc);
}
});
metaDoc.keys = uniq(newKeys.concat(metaDoc.keys));
kvDocs.push(metaDoc);
return kvDocs;
}
return getMetaDoc().then(function (metaDoc) {
return getKeyValueDocs(metaDoc).then(function (kvDocsRes) {
return processKeyValueDocs(metaDoc, kvDocsRes);
});
});
}
// updates all emitted key/value docs and metaDocs in the mrview database
// for the given batch of documents from the source database
function saveKeyValues(view, docIdsToChangesAndEmits, seq) {
var seqDocId = '_local/lastSeq';
return view.db.get(seqDocId)
.catch(defaultsTo({_id: seqDocId, seq: 0}))
.then(function (lastSeqDoc) {
var docIds = mapToKeysArray(docIdsToChangesAndEmits);
return PouchPromise$1.all(docIds.map(function (docId) {
return getDocsToPersist(docId, view, docIdsToChangesAndEmits);
})).then(function (listOfDocsToPersist) {
var docsToPersist = flatten(listOfDocsToPersist);
lastSeqDoc.seq = seq;
docsToPersist.push(lastSeqDoc);
// write all docs in a single operation, update the seq once
return view.db.bulkDocs({docs : docsToPersist});
});
});
}
function getQueue(view) {
var viewName = typeof view === 'string' ? view : view.name;
var queue = persistentQueues[viewName];
if (!queue) {
queue = persistentQueues[viewName] = new TaskQueue$2();
}
return queue;
}
function updateView(view) {
return sequentialize(getQueue(view), function () {
return updateViewInQueue(view);
})();
}
function updateViewInQueue(view) {
// bind the emit function once
var mapResults;
var doc;
function emit(key, value) {
var output = {id: doc._id, key: normalizeKey(key)};
// Don't explicitly store the value unless it's defined and non-null.
// This saves on storage space, because often people don't use it.
if (typeof value !== 'undefined' && value !== null) {
output.value = normalizeKey(value);
}
mapResults.push(output);
}
var mapFun = mapper(view.mapFun, emit);
var currentSeq = view.seq || 0;
function processChange(docIdsToChangesAndEmits, seq) {
return function () {
return saveKeyValues(view, docIdsToChangesAndEmits, seq);
};
}
var queue = new TaskQueue$2();
function processNextBatch() {
return view.sourceDB.changes({
conflicts: true,
include_docs: true,
style: 'all_docs',
since: currentSeq,
limit: CHANGES_BATCH_SIZE$1
}).then(processBatch);
}
function processBatch(response) {
var results = response.results;
if (!results.length) {
return;
}
var docIdsToChangesAndEmits = createDocIdsToChangesAndEmits(results);
queue.add(processChange(docIdsToChangesAndEmits, currentSeq));
if (results.length < CHANGES_BATCH_SIZE$1) {
return;
}
return processNextBatch();
}
function createDocIdsToChangesAndEmits(results) {
var docIdsToChangesAndEmits = new ExportedMap();
for (var i = 0, len = results.length; i < len; i++) {
var change = results[i];
if (change.doc._id[0] !== '_') {
mapResults = [];
doc = change.doc;
if (!doc._deleted) {
tryMap(view.sourceDB, mapFun, doc);
}
mapResults.sort(sortByKeyThenValue);
var indexableKeysToKeyValues = createIndexableKeysToKeyValues(mapResults);
docIdsToChangesAndEmits.set(change.doc._id, [
indexableKeysToKeyValues,
change.changes
]);
}
currentSeq = change.seq;
}
return docIdsToChangesAndEmits;
}
function createIndexableKeysToKeyValues(mapResults) {
var indexableKeysToKeyValues = new ExportedMap();
var lastKey;
for (var i = 0, len = mapResults.length; i < len; i++) {
var emittedKeyValue = mapResults[i];
var complexKey = [emittedKeyValue.key, emittedKeyValue.id];
if (i > 0 && collate(emittedKeyValue.key, lastKey) === 0) {
complexKey.push(i); // dup key+id, so make it unique
}
indexableKeysToKeyValues.set(toIndexableString(complexKey), emittedKeyValue);
lastKey = emittedKeyValue.key;
}
return indexableKeysToKeyValues;
}
return processNextBatch().then(function () {
return queue.finish();
}).then(function () {
view.seq = currentSeq;
});
}
function reduceView(view, results, options) {
if (options.group_level === 0) {
delete options.group_level;
}
var shouldGroup = options.group || options.group_level;
var reduceFun = reducer(view.reduceFun);
var groups = [];
var lvl = isNaN(options.group_level) ? Number.POSITIVE_INFINITY :
options.group_level;
results.forEach(function (e) {
var last = groups[groups.length - 1];
var groupKey = shouldGroup ? e.key : null;
// only set group_level for array keys
if (shouldGroup && Array.isArray(groupKey)) {
groupKey = groupKey.slice(0, lvl);
}
if (last && collate(last.groupKey, groupKey) === 0) {
last.keys.push([e.key, e.id]);
last.values.push(e.value);
return;
}
groups.push({
keys: [[e.key, e.id]],
values: [e.value],
groupKey: groupKey
});
});
results = [];
for (var i = 0, len = groups.length; i < len; i++) {
var e = groups[i];
var reduceTry = tryReduce(view.sourceDB, reduceFun, e.keys, e.values, false);
if (reduceTry.error && reduceTry.error instanceof BuiltInError) {
// CouchDB returns an error if a built-in errors out
throw reduceTry.error;
}
results.push({
// CouchDB just sets the value to null if a non-built-in errors out
value: reduceTry.error ? null : reduceTry.output,
key: e.groupKey
});
}
// no total_rows/offset when reducing
return {rows: sliceResults(results, options.limit, options.skip)};
}
function queryView(view, opts) {
return sequentialize(getQueue(view), function () {
return queryViewInQueue(view, opts);
})();
}
function queryViewInQueue(view, opts) {
var totalRows;
var shouldReduce = view.reduceFun && opts.reduce !== false;
var skip = opts.skip || 0;
if (typeof opts.keys !== 'undefined' && !opts.keys.length) {
// equivalent query
opts.limit = 0;
delete opts.keys;
}
function fetchFromView(viewOpts) {
viewOpts.include_docs = true;
return view.db.allDocs(viewOpts).then(function (res$$1) {
totalRows = res$$1.total_rows;
return res$$1.rows.map(function (result) {
// implicit migration - in older versions of PouchDB,
// we explicitly stored the doc as {id: ..., key: ..., value: ...}
// this is tested in a migration test
/* istanbul ignore next */
if ('value' in result.doc && typeof result.doc.value === 'object' &&
result.doc.value !== null) {
var keys = Object.keys(result.doc.value).sort();
// this detection method is not perfect, but it's unlikely the user
// emitted a value which was an object with these 3 exact keys
var expectedKeys = ['id', 'key', 'value'];
if (!(keys < expectedKeys || keys > expectedKeys)) {
return result.doc.value;
}
}
var parsedKeyAndDocId = parseIndexableString(result.doc._id);
return {
key: parsedKeyAndDocId[0],
id: parsedKeyAndDocId[1],
value: ('value' in result.doc ? result.doc.value : null)
};
});
});
}
function onMapResultsReady(rows) {
var finalResults;
if (shouldReduce) {
finalResults = reduceView(view, rows, opts);
} else {
finalResults = {
total_rows: totalRows,
offset: skip,
rows: rows
};
}
if (opts.include_docs) {
var docIds = uniq(rows.map(rowToDocId));
return view.sourceDB.allDocs({
keys: docIds,
include_docs: true,
conflicts: opts.conflicts,
attachments: opts.attachments,
binary: opts.binary
}).then(function (allDocsRes) {
var docIdsToDocs = new ExportedMap();
allDocsRes.rows.forEach(function (row) {
docIdsToDocs.set(row.id, row.doc);
});
rows.forEach(function (row) {
var docId = rowToDocId(row);
var doc = docIdsToDocs.get(docId);
if (doc) {
row.doc = doc;
}
});
return finalResults;
});
} else {
return finalResults;
}
}
if (typeof opts.keys !== 'undefined') {
var keys = opts.keys;
var fetchPromises = keys.map(function (key) {
var viewOpts = {
startkey : toIndexableString([key]),
endkey : toIndexableString([key, {}])
};
return fetchFromView(viewOpts);
});
return PouchPromise$1.all(fetchPromises).then(flatten).then(onMapResultsReady);
} else { // normal query, no 'keys'
var viewOpts = {
descending : opts.descending
};
var startkey;
var endkey;
if ('start_key' in opts) {
startkey = opts.start_key;
}
if ('startkey' in opts) {
startkey = opts.startkey;
}
if ('end_key' in opts) {
endkey = opts.end_key;
}
if ('endkey' in opts) {
endkey = opts.endkey;
}
if (typeof startkey !== 'undefined') {
viewOpts.startkey = opts.descending ?
toIndexableString([startkey, {}]) :
toIndexableString([startkey]);
}
if (typeof endkey !== 'undefined') {
var inclusiveEnd = opts.inclusive_end !== false;
if (opts.descending) {
inclusiveEnd = !inclusiveEnd;
}
viewOpts.endkey = toIndexableString(
inclusiveEnd ? [endkey, {}] : [endkey]);
}
if (typeof opts.key !== 'undefined') {
var keyStart = toIndexableString([opts.key]);
var keyEnd = toIndexableString([opts.key, {}]);
if (viewOpts.descending) {
viewOpts.endkey = keyStart;
viewOpts.startkey = keyEnd;
} else {
viewOpts.startkey = keyStart;
viewOpts.endkey = keyEnd;
}
}
if (!shouldReduce) {
if (typeof opts.limit === 'number') {
viewOpts.limit = opts.limit;
}
viewOpts.skip = skip;
}
return fetchFromView(viewOpts).then(onMapResultsReady);
}
}
function httpViewCleanup(db) {
return db.request({
method: 'POST',
url: '_view_cleanup'
});
}
function localViewCleanup(db) {
return db.get('_local/' + localDocName).then(function (metaDoc) {
var docsToViews = new ExportedMap();
Object.keys(metaDoc.views).forEach(function (fullViewName) {
var parts = parseViewName(fullViewName);
var designDocName = '_design/' + parts[0];
var viewName = parts[1];
var views = docsToViews.get(designDocName);
if (!views) {
views = new ExportedSet();
docsToViews.set(designDocName, views);
}
views.add(viewName);
});
var opts = {
keys : mapToKeysArray(docsToViews),
include_docs : true
};
return db.allDocs(opts).then(function (res$$1) {
var viewsToStatus = {};
res$$1.rows.forEach(function (row) {
var ddocName = row.key.substring(8); // cuts off '_design/'
docsToViews.get(row.key).forEach(function (viewName) {
var fullViewName = ddocName + '/' + viewName;
/* istanbul ignore if */
if (!metaDoc.views[fullViewName]) {
// new format, without slashes, to support PouchDB 2.2.0
// migration test in pouchdb's browser.migration.js verifies this
fullViewName = viewName;
}
var viewDBNames = Object.keys(metaDoc.views[fullViewName]);
// design doc deleted, or view function nonexistent
var statusIsGood = row.doc && row.doc.views &&
row.doc.views[viewName];
viewDBNames.forEach(function (viewDBName) {
viewsToStatus[viewDBName] =
viewsToStatus[viewDBName] || statusIsGood;
});
});
});
var dbsToDelete = Object.keys(viewsToStatus).filter(
function (viewDBName) { return !viewsToStatus[viewDBName]; });
var destroyPromises = dbsToDelete.map(function (viewDBName) {
return sequentialize(getQueue(viewDBName), function () {
return new db.constructor(viewDBName, db.__opts).destroy();
})();
});
return PouchPromise$1.all(destroyPromises).then(function () {
return {ok: true};
});
});
}, defaultsTo({ok: true}));
}
function queryPromised(db, fun, opts) {
/* istanbul ignore next */
if (typeof db._query === 'function') {
return customQuery(db, fun, opts);
}
if (isRemote(db)) {
return httpQuery(db, fun, opts);
}
if (typeof fun !== 'string') {
// temp_view
checkQueryParseError(opts, fun);
tempViewQueue.add(function () {
var createViewPromise = createView(
/* sourceDB */ db,
/* viewName */ 'temp_view/temp_view',
/* mapFun */ fun.map,
/* reduceFun */ fun.reduce,
/* temporary */ true,
/* localDocName */ localDocName);
return createViewPromise.then(function (view) {
return fin(updateView(view).then(function () {
return queryView(view, opts);
}), function () {
return view.db.destroy();
});
});
});
return tempViewQueue.finish();
} else {
// persistent view
var fullViewName = fun;
var parts = parseViewName(fullViewName);
var designDocName = parts[0];
var viewName = parts[1];
return db.get('_design/' + designDocName).then(function (doc) {
var fun = doc.views && doc.views[viewName];
if (!fun) {
// basic validator; it's assumed that every subclass would want this
throw new NotFoundError$2('ddoc ' + doc._id + ' has no view named ' +
viewName);
}
ddocValidator(doc, viewName);
checkQueryParseError(opts, fun);
var createViewPromise = createView(
/* sourceDB */ db,
/* viewName */ fullViewName,
/* mapFun */ fun.map,
/* reduceFun */ fun.reduce,
/* temporary */ false,
/* localDocName */ localDocName);
return createViewPromise.then(function (view) {
if (opts.stale === 'ok' || opts.stale === 'update_after') {
if (opts.stale === 'update_after') {
nextTick(function () {
updateView(view);
});
}
return queryView(view, opts);
} else { // stale not ok
return updateView(view).then(function () {
return queryView(view, opts);
});
}
});
});
}
}
function abstractQuery(fun, opts, callback) {
var db = this;
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = opts ? coerceOptions(opts) : {};
if (typeof fun === 'function') {
fun = {map : fun};
}
var promise = PouchPromise$1.resolve().then(function () {
return queryPromised(db, fun, opts);
});
promisedCallback(promise, callback);
return promise;
}
var abstractViewCleanup = callbackify(function () {
var db = this;
/* istanbul ignore next */
if (typeof db._viewCleanup === 'function') {
return customViewCleanup(db);
}
if (isRemote(db)) {
return httpViewCleanup(db);
}
return localViewCleanup(db);
});
return {
query: abstractQuery,
viewCleanup: abstractViewCleanup
};
}
var builtInReduce = {
_sum: function (keys, values) {
return sum(values);
},
_count: function (keys, values) {
return values.length;
},
_stats: function (keys, values) {
// no need to implement rereduce=true, because Pouch
// will never call it
function sumsqr(values) {
var _sumsqr = 0;
for (var i = 0, len = values.length; i < len; i++) {
var num = values[i];
_sumsqr += (num * num);
}
return _sumsqr;
}
return {
sum : sum(values),
min : Math.min.apply(null, values),
max : Math.max.apply(null, values),
count : values.length,
sumsqr : sumsqr(values)
};
}
};
function getBuiltIn(reduceFunString) {
if (/^_sum/.test(reduceFunString)) {
return builtInReduce._sum;
} else if (/^_count/.test(reduceFunString)) {
return builtInReduce._count;
} else if (/^_stats/.test(reduceFunString)) {
return builtInReduce._stats;
} else if (/^_/.test(reduceFunString)) {
throw new Error(reduceFunString + ' is not a supported reduce function.');
}
}
function mapper(mapFun, emit) {
// for temp_views one can use emit(doc, emit), see #38
if (typeof mapFun === "function" && mapFun.length === 2) {
var origMap = mapFun;
return function (doc) {
return origMap(doc, emit);
};
} else {
return evalFunction(mapFun.toString(), emit);
}
}
function reducer(reduceFun) {
var reduceFunString = reduceFun.toString();
var builtIn = getBuiltIn(reduceFunString);
if (builtIn) {
return builtIn;
} else {
return evalFunction(reduceFunString);
}
}
function ddocValidator(ddoc, viewName) {
var fun = ddoc.views && ddoc.views[viewName];
if (typeof fun.map !== 'string') {
throw new NotFoundError$2('ddoc ' + ddoc._id + ' has no string view named ' +
viewName + ', instead found object of type: ' + typeof fun.map);
}
}
var localDocName = 'mrviews';
var abstract = createAbstractMapReduce(localDocName, mapper, reducer, ddocValidator);
function query(fun, opts, callback) {
return abstract.query.call(this, fun, opts, callback);
}
function viewCleanup(callback) {
return abstract.viewCleanup.call(this, callback);
}
var mapreduce = {
query: query,
viewCleanup: viewCleanup
};
function isGenOne$1(rev$$1) {
return /^1-/.test(rev$$1);
}
function fileHasChanged(localDoc, remoteDoc, filename) {
return !localDoc._attachments ||
!localDoc._attachments[filename] ||
localDoc._attachments[filename].digest !== remoteDoc._attachments[filename].digest;
}
function getDocAttachments(db, doc) {
var filenames = Object.keys(doc._attachments);
return PouchPromise$1.all(filenames.map(function (filename) {
return db.getAttachment(doc._id, filename, {rev: doc._rev});
}));
}
function getDocAttachmentsFromTargetOrSource(target, src, doc) {
var doCheckForLocalAttachments = isRemote(src) && !isRemote(target);
var filenames = Object.keys(doc._attachments);
if (!doCheckForLocalAttachments) {
return getDocAttachments(src, doc);
}
return target.get(doc._id).then(function (localDoc) {
return PouchPromise$1.all(filenames.map(function (filename) {
if (fileHasChanged(localDoc, doc, filename)) {
return src.getAttachment(doc._id, filename);
}
return target.getAttachment(localDoc._id, filename);
}));
}).catch(function (error) {
/* istanbul ignore if */
if (error.status !== 404) {
throw error;
}
return getDocAttachments(src, doc);
});
}
function createBulkGetOpts(diffs) {
var requests = [];
Object.keys(diffs).forEach(function (id) {
var missingRevs = diffs[id].missing;
missingRevs.forEach(function (missingRev) {
requests.push({
id: id,
rev: missingRev
});
});
});
return {
docs: requests,
revs: true,
latest: true
};
}
//
// Fetch all the documents from the src as described in the "diffs",
// which is a mapping of docs IDs to revisions. If the state ever
// changes to "cancelled", then the returned promise will be rejected.
// Else it will be resolved with a list of fetched documents.
//
function getDocs(src, target, diffs, state) {
diffs = clone(diffs); // we do not need to modify this
var resultDocs = [],
ok = true;
function getAllDocs() {
var bulkGetOpts = createBulkGetOpts(diffs);
if (!bulkGetOpts.docs.length) { // optimization: skip empty requests
return;
}
return src.bulkGet(bulkGetOpts).then(function (bulkGetResponse) {
/* istanbul ignore if */
if (state.cancelled) {
throw new Error('cancelled');
}
return PouchPromise$1.all(bulkGetResponse.results.map(function (bulkGetInfo) {
return PouchPromise$1.all(bulkGetInfo.docs.map(function (doc) {
var remoteDoc = doc.ok;
if (doc.error) {
// when AUTO_COMPACTION is set, docs can be returned which look
// like this: {"missing":"1-7c3ac256b693c462af8442f992b83696"}
ok = false;
}
if (!remoteDoc || !remoteDoc._attachments) {
return remoteDoc;
}
return getDocAttachmentsFromTargetOrSource(target, src, remoteDoc)
.then(function (attachments) {
var filenames = Object.keys(remoteDoc._attachments);
attachments
.forEach(function (attachment, i) {
var att = remoteDoc._attachments[filenames[i]];
delete att.stub;
delete att.length;
att.data = attachment;
});
return remoteDoc;
});
}));
}))
.then(function (results) {
resultDocs = resultDocs.concat(flatten(results).filter(Boolean));
});
});
}
function hasAttachments(doc) {
return doc._attachments && Object.keys(doc._attachments).length > 0;
}
function hasConflicts(doc) {
return doc._conflicts && doc._conflicts.length > 0;
}
function fetchRevisionOneDocs(ids) {
// Optimization: fetch gen-1 docs and attachments in
// a single request using _all_docs
return src.allDocs({
keys: ids,
include_docs: true,
conflicts: true
}).then(function (res$$1) {
if (state.cancelled) {
throw new Error('cancelled');
}
res$$1.rows.forEach(function (row) {
if (row.deleted || !row.doc || !isGenOne$1(row.value.rev) ||
hasAttachments(row.doc) || hasConflicts(row.doc)) {
// if any of these conditions apply, we need to fetch using get()
return;
}
// strip _conflicts array to appease CSG (#5793)
/* istanbul ignore if */
if (row.doc._conflicts) {
delete row.doc._conflicts;
}
// the doc we got back from allDocs() is sufficient
resultDocs.push(row.doc);
delete diffs[row.id];
});
});
}
function getRevisionOneDocs() {
// filter out the generation 1 docs and get them
// leaving the non-generation one docs to be got otherwise
var ids = Object.keys(diffs).filter(function (id) {
var missing = diffs[id].missing;
return missing.length === 1 && isGenOne$1(missing[0]);
});
if (ids.length > 0) {
return fetchRevisionOneDocs(ids);
}
}
function returnResult() {
return { ok:ok, docs:resultDocs };
}
return PouchPromise$1.resolve()
.then(getRevisionOneDocs)
.then(getAllDocs)
.then(returnResult);
}
var CHECKPOINT_VERSION = 1;
var REPLICATOR = "pouchdb";
// This is an arbitrary number to limit the
// amount of replication history we save in the checkpoint.
// If we save too much, the checkpoing docs will become very big,
// if we save fewer, we'll run a greater risk of having to
// read all the changes from 0 when checkpoint PUTs fail
// CouchDB 2.0 has a more involved history pruning,
// but let's go for the simple version for now.
var CHECKPOINT_HISTORY_SIZE = 5;
var LOWEST_SEQ = 0;
function updateCheckpoint(db, id, checkpoint, session, returnValue) {
return db.get(id).catch(function (err) {
if (err.status === 404) {
if (db.adapter === 'http' || db.adapter === 'https') {
res(
404, 'PouchDB is just checking if a remote checkpoint exists.'
);
}
return {
session_id: session,
_id: id,
history: [],
replicator: REPLICATOR,
version: CHECKPOINT_VERSION
};
}
throw err;
}).then(function (doc) {
if (returnValue.cancelled) {
return;
}
// if the checkpoint has not changed, do not update
if (doc.last_seq === checkpoint) {
return;
}
// Filter out current entry for this replication
doc.history = (doc.history || []).filter(function (item) {
return item.session_id !== session;
});
// Add the latest checkpoint to history
doc.history.unshift({
last_seq: checkpoint,
session_id: session
});
// Just take the last pieces in history, to
// avoid really big checkpoint docs.
// see comment on history size above
doc.history = doc.history.slice(0, CHECKPOINT_HISTORY_SIZE);
doc.version = CHECKPOINT_VERSION;
doc.replicator = REPLICATOR;
doc.session_id = session;
doc.last_seq = checkpoint;
return db.put(doc).catch(function (err) {
if (err.status === 409) {
// retry; someone is trying to write a checkpoint simultaneously
return updateCheckpoint(db, id, checkpoint, session, returnValue);
}
throw err;
});
});
}
function Checkpointer(src, target, id, returnValue, opts) {
this.src = src;
this.target = target;
this.id = id;
this.returnValue = returnValue;
this.opts = opts;
}
Checkpointer.prototype.writeCheckpoint = function (checkpoint, session) {
var self = this;
return this.updateTarget(checkpoint, session).then(function () {
return self.updateSource(checkpoint, session);
});
};
Checkpointer.prototype.updateTarget = function (checkpoint, session) {
if (this.opts.writeTargetCheckpoint) {
return updateCheckpoint(this.target, this.id, checkpoint,
session, this.returnValue);
} else {
return PouchPromise$1.resolve(true);
}
};
Checkpointer.prototype.updateSource = function (checkpoint, session) {
if (this.opts.writeSourceCheckpoint) {
var self = this;
if (this.readOnlySource) {
return PouchPromise$1.resolve(true);
}
return updateCheckpoint(this.src, this.id, checkpoint,
session, this.returnValue)
.catch(function (err) {
if (isForbiddenError(err)) {
self.readOnlySource = true;
return true;
}
throw err;
});
} else {
return PouchPromise$1.resolve(true);
}
};
var comparisons = {
"undefined": function (targetDoc, sourceDoc) {
// This is the previous comparison function
if (collate(targetDoc.last_seq, sourceDoc.last_seq) === 0) {
return sourceDoc.last_seq;
}
/* istanbul ignore next */
return 0;
},
"1": function (targetDoc, sourceDoc) {
// This is the comparison function ported from CouchDB
return compareReplicationLogs(sourceDoc, targetDoc).last_seq;
}
};
Checkpointer.prototype.getCheckpoint = function () {
var self = this;
return self.target.get(self.id).then(function (targetDoc) {
if (self.readOnlySource) {
return PouchPromise$1.resolve(targetDoc.last_seq);
}
return self.src.get(self.id).then(function (sourceDoc) {
// Since we can't migrate an old version doc to a new one
// (no session id), we just go with the lowest seq in this case
/* istanbul ignore if */
if (targetDoc.version !== sourceDoc.version) {
return LOWEST_SEQ;
}
var version;
if (targetDoc.version) {
version = targetDoc.version.toString();
} else {
version = "undefined";
}
if (version in comparisons) {
return comparisons[version](targetDoc, sourceDoc);
}
/* istanbul ignore next */
return LOWEST_SEQ;
}, function (err) {
if (err.status === 404 && targetDoc.last_seq) {
return self.src.put({
_id: self.id,
last_seq: LOWEST_SEQ
}).then(function () {
return LOWEST_SEQ;
}, function (err) {
if (isForbiddenError(err)) {
self.readOnlySource = true;
return targetDoc.last_seq;
}
/* istanbul ignore next */
return LOWEST_SEQ;
});
}
throw err;
});
}).catch(function (err) {
if (err.status !== 404) {
throw err;
}
return LOWEST_SEQ;
});
};
// This checkpoint comparison is ported from CouchDBs source
// they come from here:
// https://github.com/apache/couchdb-couch-replicator/blob/master/src/couch_replicator.erl#L863-L906
function compareReplicationLogs(srcDoc, tgtDoc) {
if (srcDoc.session_id === tgtDoc.session_id) {
return {
last_seq: srcDoc.last_seq,
history: srcDoc.history
};
}
return compareReplicationHistory(srcDoc.history, tgtDoc.history);
}
function compareReplicationHistory(sourceHistory, targetHistory) {
// the erlang loop via function arguments is not so easy to repeat in JS
// therefore, doing this as recursion
var S = sourceHistory[0];
var sourceRest = sourceHistory.slice(1);
var T = targetHistory[0];
var targetRest = targetHistory.slice(1);
if (!S || targetHistory.length === 0) {
return {
last_seq: LOWEST_SEQ,
history: []
};
}
var sourceId = S.session_id;
/* istanbul ignore if */
if (hasSessionId(sourceId, targetHistory)) {
return {
last_seq: S.last_seq,
history: sourceHistory
};
}
var targetId = T.session_id;
if (hasSessionId(targetId, sourceRest)) {
return {
last_seq: T.last_seq,
history: targetRest
};
}
return compareReplicationHistory(sourceRest, targetRest);
}
function hasSessionId(sessionId, history) {
var props = history[0];
var rest = history.slice(1);
if (!sessionId || history.length === 0) {
return false;
}
if (sessionId === props.session_id) {
return true;
}
return hasSessionId(sessionId, rest);
}
function isForbiddenError(err) {
return typeof err.status === 'number' && Math.floor(err.status / 100) === 4;
}
var STARTING_BACK_OFF = 0;
function backOff(opts, returnValue, error, callback) {
if (opts.retry === false) {
returnValue.emit('error', error);
returnValue.removeAllListeners();
return;
}
if (typeof opts.back_off_function !== 'function') {
opts.back_off_function = defaultBackOff;
}
returnValue.emit('requestError', error);
if (returnValue.state === 'active' || returnValue.state === 'pending') {
returnValue.emit('paused', error);
returnValue.state = 'stopped';
var backOffSet = function backoffTimeSet() {
opts.current_back_off = STARTING_BACK_OFF;
};
var removeBackOffSetter = function removeBackOffTimeSet() {
returnValue.removeListener('active', backOffSet);
};
returnValue.once('paused', removeBackOffSetter);
returnValue.once('active', backOffSet);
}
opts.current_back_off = opts.current_back_off || STARTING_BACK_OFF;
opts.current_back_off = opts.back_off_function(opts.current_back_off);
setTimeout(callback, opts.current_back_off);
}
function sortObjectPropertiesByKey(queryParams) {
return Object.keys(queryParams).sort(collate).reduce(function (result, key) {
result[key] = queryParams[key];
return result;
}, {});
}
// Generate a unique id particular to this replication.
// Not guaranteed to align perfectly with CouchDB's rep ids.
function generateReplicationId(src, target, opts) {
var docIds = opts.doc_ids ? opts.doc_ids.sort(collate) : '';
var filterFun = opts.filter ? opts.filter.toString() : '';
var queryParams = '';
var filterViewName = '';
var selector = '';
// possibility for checkpoints to be lost here as behaviour of
// JSON.stringify is not stable (see #6226)
/* istanbul ignore if */
if (opts.selector) {
selector = JSON.stringify(opts.selector);
}
if (opts.filter && opts.query_params) {
queryParams = JSON.stringify(sortObjectPropertiesByKey(opts.query_params));
}
if (opts.filter && opts.filter === '_view') {
filterViewName = opts.view.toString();
}
return PouchPromise$1.all([src.id(), target.id()]).then(function (res) {
var queryData = res[0] + res[1] + filterFun + filterViewName +
queryParams + docIds + selector;
return new PouchPromise$1(function (resolve) {
binaryMd5(queryData, resolve);
});
}).then(function (md5sum) {
// can't use straight-up md5 alphabet, because
// the char '/' is interpreted as being for attachments,
// and + is also not url-safe
md5sum = md5sum.replace(/\//g, '.').replace(/\+/g, '_');
return '_local/' + md5sum;
});
}
function replicate(src, target, opts, returnValue, result) {
var batches = []; // list of batches to be processed
var currentBatch; // the batch currently being processed
var pendingBatch = {
seq: 0,
changes: [],
docs: []
}; // next batch, not yet ready to be processed
var writingCheckpoint = false; // true while checkpoint is being written
var changesCompleted = false; // true when all changes received
var replicationCompleted = false; // true when replication has completed
var last_seq = 0;
var continuous = opts.continuous || opts.live || false;
var batch_size = opts.batch_size || 100;
var batches_limit = opts.batches_limit || 10;
var changesPending = false; // true while src.changes is running
var doc_ids = opts.doc_ids;
var selector = opts.selector;
var repId;
var checkpointer;
var changedDocs = [];
// Like couchdb, every replication gets a unique session id
var session = uuid();
result = result || {
ok: true,
start_time: new Date(),
docs_read: 0,
docs_written: 0,
doc_write_failures: 0,
errors: []
};
var changesOpts = {};
returnValue.ready(src, target);
function initCheckpointer() {
if (checkpointer) {
return PouchPromise$1.resolve();
}
return generateReplicationId(src, target, opts).then(function (res$$1) {
repId = res$$1;
var checkpointOpts = {};
if (opts.checkpoint === false) {
checkpointOpts = { writeSourceCheckpoint: false, writeTargetCheckpoint: false };
} else if (opts.checkpoint === 'source') {
checkpointOpts = { writeSourceCheckpoint: true, writeTargetCheckpoint: false };
} else if (opts.checkpoint === 'target') {
checkpointOpts = { writeSourceCheckpoint: false, writeTargetCheckpoint: true };
} else {
checkpointOpts = { writeSourceCheckpoint: true, writeTargetCheckpoint: true };
}
checkpointer = new Checkpointer(src, target, repId, returnValue, checkpointOpts);
});
}
function writeDocs() {
changedDocs = [];
if (currentBatch.docs.length === 0) {
return;
}
var docs = currentBatch.docs;
var bulkOpts = {timeout: opts.timeout};
return target.bulkDocs({docs: docs, new_edits: false}, bulkOpts).then(function (res$$1) {
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
// `res` doesn't include full documents (which live in `docs`), so we create a map of
// (id -> error), and check for errors while iterating over `docs`
var errorsById = Object.create(null);
res$$1.forEach(function (res$$1) {
if (res$$1.error) {
errorsById[res$$1.id] = res$$1;
}
});
var errorsNo = Object.keys(errorsById).length;
result.doc_write_failures += errorsNo;
result.docs_written += docs.length - errorsNo;
docs.forEach(function (doc) {
var error = errorsById[doc._id];
if (error) {
result.errors.push(error);
if (error.name === 'unauthorized' || error.name === 'forbidden') {
returnValue.emit('denied', clone(error));
} else {
throw error;
}
} else {
changedDocs.push(doc);
}
});
}, function (err) {
result.doc_write_failures += docs.length;
throw err;
});
}
function finishBatch() {
if (currentBatch.error) {
throw new Error('There was a problem getting docs.');
}
result.last_seq = last_seq = currentBatch.seq;
var outResult = clone(result);
if (changedDocs.length) {
outResult.docs = changedDocs;
returnValue.emit('change', outResult);
}
writingCheckpoint = true;
return checkpointer.writeCheckpoint(currentBatch.seq,
session).then(function () {
writingCheckpoint = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
currentBatch = undefined;
getChanges();
}).catch(function (err) {
onCheckpointError(err);
throw err;
});
}
function getDiffs() {
var diff = {};
currentBatch.changes.forEach(function (change) {
// Couchbase Sync Gateway emits these, but we can ignore them
/* istanbul ignore if */
if (change.id === "_user/") {
return;
}
diff[change.id] = change.changes.map(function (x) {
return x.rev;
});
});
return target.revsDiff(diff).then(function (diffs) {
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
// currentBatch.diffs elements are deleted as the documents are written
currentBatch.diffs = diffs;
});
}
function getBatchDocs() {
return getDocs(src, target, currentBatch.diffs, returnValue).then(function (got) {
currentBatch.error = !got.ok;
got.docs.forEach(function (doc) {
delete currentBatch.diffs[doc._id];
result.docs_read++;
currentBatch.docs.push(doc);
});
});
}
function startNextBatch() {
if (returnValue.cancelled || currentBatch) {
return;
}
if (batches.length === 0) {
processPendingBatch(true);
return;
}
currentBatch = batches.shift();
getDiffs()
.then(getBatchDocs)
.then(writeDocs)
.then(finishBatch)
.then(startNextBatch)
.catch(function (err) {
abortReplication('batch processing terminated with error', err);
});
}
function processPendingBatch(immediate) {
if (pendingBatch.changes.length === 0) {
if (batches.length === 0 && !currentBatch) {
if ((continuous && changesOpts.live) || changesCompleted) {
returnValue.state = 'pending';
returnValue.emit('paused');
}
if (changesCompleted) {
completeReplication();
}
}
return;
}
if (
immediate ||
changesCompleted ||
pendingBatch.changes.length >= batch_size
) {
batches.push(pendingBatch);
pendingBatch = {
seq: 0,
changes: [],
docs: []
};
if (returnValue.state === 'pending' || returnValue.state === 'stopped') {
returnValue.state = 'active';
returnValue.emit('active');
}
startNextBatch();
}
}
function abortReplication(reason, err) {
if (replicationCompleted) {
return;
}
if (!err.message) {
err.message = reason;
}
result.ok = false;
result.status = 'aborting';
batches = [];
pendingBatch = {
seq: 0,
changes: [],
docs: []
};
completeReplication(err);
}
function completeReplication(fatalError) {
if (replicationCompleted) {
return;
}
/* istanbul ignore if */
if (returnValue.cancelled) {
result.status = 'cancelled';
if (writingCheckpoint) {
return;
}
}
result.status = result.status || 'complete';
result.end_time = new Date();
result.last_seq = last_seq;
replicationCompleted = true;
if (fatalError) {
// need to extend the error because Firefox considers ".result" read-only
fatalError = createError(fatalError);
fatalError.result = result;
if (fatalError.name === 'unauthorized' || fatalError.name === 'forbidden') {
returnValue.emit('error', fatalError);
returnValue.removeAllListeners();
} else {
backOff(opts, returnValue, fatalError, function () {
replicate(src, target, opts, returnValue);
});
}
} else {
returnValue.emit('complete', result);
returnValue.removeAllListeners();
}
}
function onChange(change) {
/* istanbul ignore if */
if (returnValue.cancelled) {
return completeReplication();
}
var filter = filterChange(opts)(change);
if (!filter) {
return;
}
pendingBatch.seq = change.seq;
pendingBatch.changes.push(change);
processPendingBatch(batches.length === 0 && changesOpts.live);
}
function onChangesComplete(changes) {
changesPending = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
return completeReplication();
}
// if no results were returned then we're done,
// else fetch more
if (changes.results.length > 0) {
changesOpts.since = changes.last_seq;
getChanges();
processPendingBatch(true);
} else {
var complete = function () {
if (continuous) {
changesOpts.live = true;
getChanges();
} else {
changesCompleted = true;
}
processPendingBatch(true);
};
// update the checkpoint so we start from the right seq next time
if (!currentBatch && changes.results.length === 0) {
writingCheckpoint = true;
checkpointer.writeCheckpoint(changes.last_seq,
session).then(function () {
writingCheckpoint = false;
result.last_seq = last_seq = changes.last_seq;
complete();
})
.catch(onCheckpointError);
} else {
complete();
}
}
}
function onChangesError(err) {
changesPending = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
return completeReplication();
}
abortReplication('changes rejected', err);
}
function getChanges() {
if (!(
!changesPending &&
!changesCompleted &&
batches.length < batches_limit
)) {
return;
}
changesPending = true;
function abortChanges() {
changes.cancel();
}
function removeListener() {
returnValue.removeListener('cancel', abortChanges);
}
if (returnValue._changes) { // remove old changes() and listeners
returnValue.removeListener('cancel', returnValue._abortChanges);
returnValue._changes.cancel();
}
returnValue.once('cancel', abortChanges);
var changes = src.changes(changesOpts)
.on('change', onChange);
changes.then(removeListener, removeListener);
changes.then(onChangesComplete)
.catch(onChangesError);
if (opts.retry) {
// save for later so we can cancel if necessary
returnValue._changes = changes;
returnValue._abortChanges = abortChanges;
}
}
function startChanges() {
initCheckpointer().then(function () {
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
return;
}
return checkpointer.getCheckpoint().then(function (checkpoint) {
last_seq = checkpoint;
changesOpts = {
since: last_seq,
limit: batch_size,
batch_size: batch_size,
style: 'all_docs',
doc_ids: doc_ids,
selector: selector,
return_docs: true // required so we know when we're done
};
if (opts.filter) {
if (typeof opts.filter !== 'string') {
// required for the client-side filter in onChange
changesOpts.include_docs = true;
} else { // ddoc filter
changesOpts.filter = opts.filter;
}
}
if ('heartbeat' in opts) {
changesOpts.heartbeat = opts.heartbeat;
}
if ('timeout' in opts) {
changesOpts.timeout = opts.timeout;
}
if (opts.query_params) {
changesOpts.query_params = opts.query_params;
}
if (opts.view) {
changesOpts.view = opts.view;
}
getChanges();
});
}).catch(function (err) {
abortReplication('getCheckpoint rejected with ', err);
});
}
/* istanbul ignore next */
function onCheckpointError(err) {
writingCheckpoint = false;
abortReplication('writeCheckpoint completed with error', err);
}
/* istanbul ignore if */
if (returnValue.cancelled) { // cancelled immediately
completeReplication();
return;
}
if (!returnValue._addedListeners) {
returnValue.once('cancel', completeReplication);
if (typeof opts.complete === 'function') {
returnValue.once('error', opts.complete);
returnValue.once('complete', function (result) {
opts.complete(null, result);
});
}
returnValue._addedListeners = true;
}
if (typeof opts.since === 'undefined') {
startChanges();
} else {
initCheckpointer().then(function () {
writingCheckpoint = true;
return checkpointer.writeCheckpoint(opts.since, session);
}).then(function () {
writingCheckpoint = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
return;
}
last_seq = opts.since;
startChanges();
}).catch(onCheckpointError);
}
}
// We create a basic promise so the caller can cancel the replication possibly
// before we have actually started listening to changes etc
inherits(Replication, events.EventEmitter);
function Replication() {
events.EventEmitter.call(this);
this.cancelled = false;
this.state = 'pending';
var self = this;
var promise = new PouchPromise$1(function (fulfill, reject) {
self.once('complete', fulfill);
self.once('error', reject);
});
self.then = function (resolve, reject) {
return promise.then(resolve, reject);
};
self.catch = function (reject) {
return promise.catch(reject);
};
// As we allow error handling via "error" event as well,
// put a stub in here so that rejecting never throws UnhandledError.
self.catch(function () {});
}
Replication.prototype.cancel = function () {
this.cancelled = true;
this.state = 'cancelled';
this.emit('cancel');
};
Replication.prototype.ready = function (src, target) {
var self = this;
if (self._readyCalled) {
return;
}
self._readyCalled = true;
function onDestroy() {
self.cancel();
}
src.once('destroyed', onDestroy);
target.once('destroyed', onDestroy);
function cleanup() {
src.removeListener('destroyed', onDestroy);
target.removeListener('destroyed', onDestroy);
}
self.once('complete', cleanup);
};
function toPouch(db, opts) {
var PouchConstructor = opts.PouchConstructor;
if (typeof db === 'string') {
return new PouchConstructor(db, opts);
} else {
return db;
}
}
function replicateWrapper(src, target, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof opts === 'undefined') {
opts = {};
}
if (opts.doc_ids && !Array.isArray(opts.doc_ids)) {
throw createError(BAD_REQUEST,
"`doc_ids` filter parameter is not a list.");
}
opts.complete = callback;
opts = clone(opts);
opts.continuous = opts.continuous || opts.live;
opts.retry = ('retry' in opts) ? opts.retry : false;
/*jshint validthis:true */
opts.PouchConstructor = opts.PouchConstructor || this;
var replicateRet = new Replication(opts);
var srcPouch = toPouch(src, opts);
var targetPouch = toPouch(target, opts);
replicate(srcPouch, targetPouch, opts, replicateRet);
return replicateRet;
}
inherits(Sync, events.EventEmitter);
function sync$1(src, target, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof opts === 'undefined') {
opts = {};
}
opts = clone(opts);
/*jshint validthis:true */
opts.PouchConstructor = opts.PouchConstructor || this;
src = toPouch(src, opts);
target = toPouch(target, opts);
return new Sync(src, target, opts, callback);
}
function Sync(src, target, opts, callback) {
var self = this;
this.canceled = false;
var optsPush = opts.push ? $inject_Object_assign({}, opts, opts.push) : opts;
var optsPull = opts.pull ? $inject_Object_assign({}, opts, opts.pull) : opts;
this.push = replicateWrapper(src, target, optsPush);
this.pull = replicateWrapper(target, src, optsPull);
this.pushPaused = true;
this.pullPaused = true;
function pullChange(change) {
self.emit('change', {
direction: 'pull',
change: change
});
}
function pushChange(change) {
self.emit('change', {
direction: 'push',
change: change
});
}
function pushDenied(doc) {
self.emit('denied', {
direction: 'push',
doc: doc
});
}
function pullDenied(doc) {
self.emit('denied', {
direction: 'pull',
doc: doc
});
}
function pushPaused() {
self.pushPaused = true;
/* istanbul ignore if */
if (self.pullPaused) {
self.emit('paused');
}
}
function pullPaused() {
self.pullPaused = true;
/* istanbul ignore if */
if (self.pushPaused) {
self.emit('paused');
}
}
function pushActive() {
self.pushPaused = false;
/* istanbul ignore if */
if (self.pullPaused) {
self.emit('active', {
direction: 'push'
});
}
}
function pullActive() {
self.pullPaused = false;
/* istanbul ignore if */
if (self.pushPaused) {
self.emit('active', {
direction: 'pull'
});
}
}
var removed = {};
function removeAll(type) { // type is 'push' or 'pull'
return function (event, func) {
var isChange = event === 'change' &&
(func === pullChange || func === pushChange);
var isDenied = event === 'denied' &&
(func === pullDenied || func === pushDenied);
var isPaused = event === 'paused' &&
(func === pullPaused || func === pushPaused);
var isActive = event === 'active' &&
(func === pullActive || func === pushActive);
if (isChange || isDenied || isPaused || isActive) {
if (!(event in removed)) {
removed[event] = {};
}
removed[event][type] = true;
if (Object.keys(removed[event]).length === 2) {
// both push and pull have asked to be removed
self.removeAllListeners(event);
}
}
};
}
if (opts.live) {
this.push.on('complete', self.pull.cancel.bind(self.pull));
this.pull.on('complete', self.push.cancel.bind(self.push));
}
function addOneListener(ee, event, listener) {
if (ee.listeners(event).indexOf(listener) == -1) {
ee.on(event, listener);
}
}
this.on('newListener', function (event) {
if (event === 'change') {
addOneListener(self.pull, 'change', pullChange);
addOneListener(self.push, 'change', pushChange);
} else if (event === 'denied') {
addOneListener(self.pull, 'denied', pullDenied);
addOneListener(self.push, 'denied', pushDenied);
} else if (event === 'active') {
addOneListener(self.pull, 'active', pullActive);
addOneListener(self.push, 'active', pushActive);
} else if (event === 'paused') {
addOneListener(self.pull, 'paused', pullPaused);
addOneListener(self.push, 'paused', pushPaused);
}
});
this.on('removeListener', function (event) {
if (event === 'change') {
self.pull.removeListener('change', pullChange);
self.push.removeListener('change', pushChange);
} else if (event === 'denied') {
self.pull.removeListener('denied', pullDenied);
self.push.removeListener('denied', pushDenied);
} else if (event === 'active') {
self.pull.removeListener('active', pullActive);
self.push.removeListener('active', pushActive);
} else if (event === 'paused') {
self.pull.removeListener('paused', pullPaused);
self.push.removeListener('paused', pushPaused);
}
});
this.pull.on('removeListener', removeAll('pull'));
this.push.on('removeListener', removeAll('push'));
var promise = PouchPromise$1.all([
this.push,
this.pull
]).then(function (resp) {
var out = {
push: resp[0],
pull: resp[1]
};
self.emit('complete', out);
if (callback) {
callback(null, out);
}
self.removeAllListeners();
return out;
}, function (err) {
self.cancel();
if (callback) {
// if there's a callback, then the callback can receive
// the error event
callback(err);
} else {
// if there's no callback, then we're safe to emit an error
// event, which would otherwise throw an unhandled error
// due to 'error' being a special event in EventEmitters
self.emit('error', err);
}
self.removeAllListeners();
if (callback) {
// no sense throwing if we're already emitting an 'error' event
throw err;
}
});
this.then = function (success, err) {
return promise.then(success, err);
};
this.catch = function (err) {
return promise.catch(err);
};
}
Sync.prototype.cancel = function () {
if (!this.canceled) {
this.canceled = true;
this.push.cancel();
this.pull.cancel();
}
};
function replication(PouchDB) {
PouchDB.replicate = replicateWrapper;
PouchDB.sync = sync$1;
Object.defineProperty(PouchDB.prototype, 'replicate', {
get: function () {
var self = this;
return {
from: function (other, opts, callback) {
return self.constructor.replicate(other, self, opts, callback);
},
to: function (other, opts, callback) {
return self.constructor.replicate(self, other, opts, callback);
}
};
}
});
PouchDB.prototype.sync = function (dbName, opts, callback) {
return this.constructor.sync(this, dbName, opts, callback);
};
}
PouchDB$5.plugin(LevelPouch)
.plugin(HttpPouch$1)
.plugin(mapreduce)
.plugin(replication);
// Pull from src because pouchdb-node/pouchdb-browser themselves
// are aggressively optimized and jsnext:main would normally give us this
// aggressive bundle.
module.exports = PouchDB$5;
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