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// Copyright 2015-2019 SWIM.AI inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package swim.uri;
import swim.codec.Diagnostic;
import swim.codec.Input;
import swim.codec.Parser;
final class UriAbsoluteParser extends Parser {
final UriParser uri;
final Parser schemeParser;
final Parser authorityParser;
final Parser pathParser;
final Parser queryParser;
final Parser fragmentParser;
final int step;
UriAbsoluteParser(UriParser uri, Parser schemeParser,
Parser authorityParser, Parser pathParser,
Parser queryParser, Parser fragmentParser, int step) {
this.uri = uri;
this.schemeParser = schemeParser;
this.authorityParser = authorityParser;
this.pathParser = pathParser;
this.queryParser = queryParser;
this.fragmentParser = fragmentParser;
this.step = step;
}
UriAbsoluteParser(UriParser uri) {
this(uri, null, null, null, null, null, 1);
}
@Override
public Parser feed(Input input) {
return parse(input, this.uri, this.schemeParser, this.authorityParser,
this.pathParser, this.queryParser, this.fragmentParser, this.step);
}
static Parser parse(Input input, UriParser uri, Parser schemeParser,
Parser authorityParser, Parser pathParser,
Parser queryParser, Parser fragmentParser, int step) {
int c = 0;
if (step == 1) {
if (input.isCont()) {
Input look = input.clone();
while (look.isCont()) {
c = look.head();
if (Uri.isSchemeChar(c)) {
look = look.step();
} else {
break;
}
}
if (look.isCont() && c == ':') {
step = 2;
} else {
step = 3;
}
} else if (input.isDone()) {
step = 3;
}
}
if (step == 2) {
if (schemeParser == null) {
schemeParser = uri.parseScheme(input);
} else {
schemeParser = schemeParser.feed(input);
}
if (schemeParser.isDone()) {
if (input.isCont() && input.head() == ':') {
input = input.step();
step = 3;
} else if (!input.isEmpty()) {
return error(Diagnostic.expected(':', input));
}
} else if (schemeParser.isError()) {
return schemeParser.asError();
}
}
if (step == 3) {
if (input.isCont()) {
c = input.head();
if (c == '/') {
input = input.step();
step = 4;
} else if (c == '?') {
input = input.step();
step = 7;
} else if (c == '#') {
input = input.step();
step = 8;
} else {
step = 6;
}
} else if (input.isDone()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
null, null, null, null));
}
}
if (step == 4) {
if (input.isCont() && input.head() == '/') {
input = input.step();
step = 5;
} else if (input.isCont()) {
final UriPathBuilder pathBuilder = uri.pathBuilder();
pathBuilder.addSlash();
pathParser = uri.parsePath(input, pathBuilder);
step = 6;
} else if (input.isDone()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
null, UriPath.slash(), null, null));
}
}
if (step == 5) {
if (authorityParser == null) {
authorityParser = uri.parseAuthority(input);
} else {
authorityParser = authorityParser.feed(input);
}
if (authorityParser.isDone()) {
if (input.isCont()) {
c = input.head();
if (c == '?') {
input = input.step();
step = 7;
} else if (c == '#') {
input = input.step();
step = 8;
} else {
step = 6;
}
} else if (input.isDone()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
authorityParser.bind(), null, null, null));
}
} else if (authorityParser.isError()) {
return authorityParser.asError();
}
}
if (step == 6) {
if (pathParser == null) {
pathParser = uri.parsePath(input);
} else {
pathParser = pathParser.feed(input);
}
if (pathParser.isDone()) {
if (input.isCont() && input.head() == '?') {
input = input.step();
step = 7;
} else if (input.isCont() && input.head() == '#') {
input = input.step();
step = 8;
} else if (!input.isEmpty()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
authorityParser != null ? authorityParser.bind() : null,
pathParser.bind(), null, null));
}
} else if (pathParser.isError()) {
return pathParser.asError();
}
}
if (step == 7) {
if (queryParser == null) {
queryParser = uri.parseQuery(input);
} else {
queryParser = queryParser.feed(input);
}
if (queryParser.isDone()) {
if (input.isCont() && input.head() == '#') {
input = input.step();
step = 8;
} else if (!input.isEmpty()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
authorityParser != null ? authorityParser.bind() : null,
pathParser != null ? pathParser.bind() : null,
queryParser.bind(), null));
}
} else if (queryParser.isError()) {
return queryParser.asError();
}
}
if (step == 8) {
if (fragmentParser == null) {
fragmentParser = uri.parseFragment(input);
} else {
fragmentParser = fragmentParser.feed(input);
}
if (fragmentParser.isDone()) {
return done(uri.absolute(schemeParser != null ? schemeParser.bind() : null,
authorityParser != null ? authorityParser.bind() : null,
pathParser != null ? pathParser.bind() : null,
queryParser != null ? queryParser.bind() : null,
fragmentParser.bind()));
} else if (fragmentParser.isError()) {
return fragmentParser.asError();
}
}
if (input.isError()) {
return error(input.trap());
}
return new UriAbsoluteParser(uri, schemeParser, authorityParser, pathParser,
queryParser, fragmentParser, step);
}
static Parser parse(Input input, UriParser uri) {
return parse(input, uri, null, null, null, null, null, 1);
}
}
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