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// Copyright (C) 2016 The Android Open Source Project
//
// 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 com.google.gerrit.server.mail.send;
import static java.util.stream.Collectors.toList;
import com.google.common.base.Strings;
import com.google.common.collect.Ordering;
import com.google.gerrit.common.data.FilenameComparator;
import com.google.gerrit.common.errors.EmailException;
import com.google.gerrit.common.errors.NoSuchEntityException;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Comment;
import com.google.gerrit.reviewdb.client.Patch;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.reviewdb.client.RobotComment;
import com.google.gerrit.server.CommentsUtil;
import com.google.gerrit.server.account.WatchConfig.NotifyType;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.mail.MailUtil;
import com.google.gerrit.server.mail.receive.Protocol;
import com.google.gerrit.server.patch.PatchFile;
import com.google.gerrit.server.patch.PatchList;
import com.google.gerrit.server.patch.PatchListNotAvailableException;
import com.google.gerrit.server.patch.PatchListObjectTooLargeException;
import com.google.gerrit.server.util.LabelVote;
import com.google.gwtorm.client.KeyUtil;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import java.io.IOException;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Repository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** Send comments, after the author of them hit used Publish Comments in the UI. */
public class CommentSender extends ReplyToChangeSender {
private static final Logger log = LoggerFactory.getLogger(CommentSender.class);
public interface Factory {
CommentSender create(Project.NameKey project, Change.Id id);
}
private class FileCommentGroup {
public String filename;
public int patchSetId;
public PatchFile fileData;
public List comments = new ArrayList<>();
/** @return a web link to the given patch set and file. */
public String getLink() {
String url = getGerritUrl();
if (url == null) {
return null;
}
return new StringBuilder()
.append(url)
.append("#/c/")
.append(change.getId())
.append('/')
.append(patchSetId)
.append('/')
.append(KeyUtil.encode(filename))
.toString();
}
/**
* @return A title for the group, i.e. "Commit Message", "Merge List", or "File [[filename]]".
*/
public String getTitle() {
if (Patch.COMMIT_MSG.equals(filename)) {
return "Commit Message";
} else if (Patch.MERGE_LIST.equals(filename)) {
return "Merge List";
} else {
return "File " + filename;
}
}
}
private List inlineComments = Collections.emptyList();
private String patchSetComment;
private List labels = Collections.emptyList();
private final CommentsUtil commentsUtil;
private final boolean incomingEmailEnabled;
private final String replyToAddress;
@Inject
public CommentSender(
EmailArguments ea,
CommentsUtil commentsUtil,
@GerritServerConfig Config cfg,
@Assisted Project.NameKey project,
@Assisted Change.Id id)
throws OrmException {
super(ea, "comment", newChangeData(ea, project, id));
this.commentsUtil = commentsUtil;
this.incomingEmailEnabled =
cfg.getEnum("receiveemail", null, "protocol", Protocol.NONE).ordinal()
> Protocol.NONE.ordinal();
this.replyToAddress = cfg.getString("sendemail", null, "replyToAddress");
}
public void setComments(List comments) throws OrmException {
inlineComments = comments;
Set paths = new HashSet<>();
for (Comment c : comments) {
if (!Patch.isMagic(c.key.filename)) {
paths.add(c.key.filename);
}
}
changeData.setCurrentFilePaths(Ordering.natural().sortedCopy(paths));
}
public void setPatchSetComment(String comment) {
this.patchSetComment = comment;
}
public void setLabels(List labels) {
this.labels = labels;
}
@Override
protected void init() throws EmailException {
super.init();
if (notify.compareTo(NotifyHandling.OWNER_REVIEWERS) >= 0) {
ccAllApprovals();
}
if (notify.compareTo(NotifyHandling.ALL) >= 0) {
bccStarredBy();
includeWatchers(NotifyType.ALL_COMMENTS, !change.isWorkInProgress() && !change.isPrivate());
}
removeUsersThatIgnoredTheChange();
// Add header that enables identifying comments on parsed email.
// Grouping is currently done by timestamp.
setHeader("X-Gerrit-Comment-Date", timestamp);
if (incomingEmailEnabled) {
if (replyToAddress == null) {
// Remove Reply-To and use outbound SMTP (default) instead.
removeHeader("Reply-To");
} else {
setHeader("Reply-To", replyToAddress);
}
}
}
@Override
public void formatChange() throws EmailException {
appendText(textTemplate("Comment"));
if (useHtml()) {
appendHtml(soyHtmlTemplate("CommentHtml"));
}
}
@Override
public void formatFooter() throws EmailException {
appendText(textTemplate("CommentFooter"));
if (useHtml()) {
appendHtml(soyHtmlTemplate("CommentFooterHtml"));
}
}
/** No longer used outside Velocity. Remove this method when VTL support is removed. */
@Deprecated
public boolean hasInlineComments() {
return !inlineComments.isEmpty();
}
/** No longer used outside Velocity. Remove this method when VTL support is removed. */
@Deprecated
public String getInlineComments() {
return getInlineComments(1);
}
/** No longer used outside Velocity. Remove this method when VTL support is removed. */
@Deprecated
public String getInlineComments(int lines) {
try (Repository repo = getRepository()) {
StringBuilder cmts = new StringBuilder();
for (FileCommentGroup group : getGroupedInlineComments(repo)) {
String link = group.getLink();
if (link != null) {
cmts.append(link).append('\n');
}
cmts.append(group.getTitle()).append(":\n\n");
for (Comment c : group.comments) {
appendComment(cmts, lines, group.fileData, c);
}
cmts.append("\n\n");
}
return cmts.toString();
}
}
/**
* @return a list of FileCommentGroup objects representing the inline comments grouped by the
* file.
*/
private List getGroupedInlineComments(Repository repo) {
List groups = new ArrayList<>();
// Get the patch list:
PatchList patchList = null;
if (repo != null) {
try {
patchList = getPatchList();
} catch (PatchListObjectTooLargeException e) {
log.warn("Failed to get patch list: " + e.getMessage());
} catch (PatchListNotAvailableException e) {
log.error("Failed to get patch list", e);
}
}
// Loop over the comments and collect them into groups based on the file
// location of the comment.
FileCommentGroup currentGroup = null;
for (Comment c : inlineComments) {
// If it's a new group:
if (currentGroup == null
|| !c.key.filename.equals(currentGroup.filename)
|| c.key.patchSetId != currentGroup.patchSetId) {
currentGroup = new FileCommentGroup();
currentGroup.filename = c.key.filename;
currentGroup.patchSetId = c.key.patchSetId;
groups.add(currentGroup);
if (patchList != null) {
try {
currentGroup.fileData = new PatchFile(repo, patchList, c.key.filename);
} catch (IOException e) {
log.warn(
"Cannot load {} from {} in {}",
c.key.filename,
patchList.getNewId().name(),
projectState.getName(),
e);
currentGroup.fileData = null;
}
}
}
if (currentGroup.fileData != null) {
currentGroup.comments.add(c);
}
}
Collections.sort(groups, Comparator.comparing(g -> g.filename, FilenameComparator.INSTANCE));
return groups;
}
/** No longer used except for Velocity. Remove this method when VTL support is removed. */
@Deprecated
private void appendComment(
StringBuilder out, int contextLines, PatchFile currentFileData, Comment comment) {
if (comment instanceof RobotComment) {
RobotComment robotComment = (RobotComment) comment;
out.append("Robot Comment from ")
.append(robotComment.robotId)
.append(" (run ID ")
.append(robotComment.robotRunId)
.append("):\n");
}
if (comment.range != null) {
appendRangedComment(out, currentFileData, comment);
} else {
appendLineComment(out, contextLines, currentFileData, comment);
}
}
/** No longer used except for Velocity. Remove this method when VTL support is removed. */
@Deprecated
private void appendRangedComment(StringBuilder out, PatchFile fileData, Comment comment) {
String prefix = getCommentLinePrefix(comment);
String emptyPrefix = Strings.padStart(": ", prefix.length(), ' ');
boolean firstLine = true;
for (String line : getLinesByRange(comment.range, fileData, comment.side)) {
out.append(firstLine ? prefix : emptyPrefix).append(line).append('\n');
firstLine = false;
}
appendQuotedParent(out, comment);
out.append(comment.message.trim()).append('\n');
}
private String getCommentLinePrefix(Comment comment) {
int lineNbr = comment.range == null ? comment.lineNbr : comment.range.startLine;
StringBuilder sb = new StringBuilder();
sb.append("PS").append(comment.key.patchSetId);
if (lineNbr != 0) {
sb.append(", Line ").append(lineNbr);
}
sb.append(": ");
return sb.toString();
}
/**
* @return the lines of file content in fileData that are encompassed by range on the given side.
*/
private List getLinesByRange(Comment.Range range, PatchFile fileData, short side) {
List lines = new ArrayList<>();
for (int n = range.startLine; n <= range.endLine; n++) {
String s = getLine(fileData, side, n);
if (n == range.startLine && n == range.endLine && range.startChar < range.endChar) {
s = s.substring(Math.min(range.startChar, s.length()), Math.min(range.endChar, s.length()));
} else if (n == range.startLine) {
s = s.substring(Math.min(range.startChar, s.length()));
} else if (n == range.endLine) {
s = s.substring(0, Math.min(range.endChar, s.length()));
}
lines.add(s);
}
return lines;
}
/** No longer used except for Velocity. Remove this method when VTL support is removed. */
@Deprecated
private void appendLineComment(
StringBuilder out, int contextLines, PatchFile currentFileData, Comment comment) {
short side = comment.side;
int lineNbr = comment.lineNbr;
// Initialize maxLines to the known line number.
int maxLines = lineNbr;
try {
maxLines = currentFileData.getLineCount(side);
} catch (IOException err) {
// The file could not be read, leave the max as is.
log.warn("Failed to read file {} on side {}", comment.key.filename, side, err);
} catch (NoSuchEntityException err) {
// The file could not be read, leave the max as is.
log.warn("Side {} of file {} didn't exist", side, comment.key.filename, err);
}
int startLine = Math.max(1, lineNbr - contextLines + 1);
int stopLine = Math.min(maxLines, lineNbr + contextLines);
for (int line = startLine; line <= lineNbr; ++line) {
appendFileLine(out, currentFileData, side, line);
}
appendQuotedParent(out, comment);
out.append(comment.message.trim()).append('\n');
for (int line = lineNbr + 1; line < stopLine; ++line) {
appendFileLine(out, currentFileData, side, line);
}
}
/** No longer used except for Velocity. Remove this method when VTL support is removed. */
@Deprecated
private void appendFileLine(StringBuilder cmts, PatchFile fileData, short side, int line) {
String lineStr = getLine(fileData, side, line);
cmts.append("Line ").append(line).append(": ").append(lineStr).append("\n");
}
/** No longer used except for Velocity. Remove this method when VTL support is removed. */
@Deprecated
private void appendQuotedParent(StringBuilder out, Comment child) {
Optional parent = getParent(child);
if (parent.isPresent()) {
out.append("> ").append(getShortenedCommentMessage(parent.get())).append('\n');
}
}
/**
* Get the parent comment of a given comment.
*
* @param child the comment with a potential parent comment.
* @return an optional comment that will be present if the given comment has a parent, and is
* empty if it does not.
*/
private Optional getParent(Comment child) {
if (child.parentUuid == null) {
return Optional.empty();
}
Comment.Key key = new Comment.Key(child.parentUuid, child.key.filename, child.key.patchSetId);
try {
return commentsUtil.getPublished(args.db.get(), changeData.notes(), key);
} catch (OrmException e) {
log.warn("Could not find the parent of this comment: {}", child.toString());
return Optional.empty();
}
}
/**
* Retrieve the file lines referred to by a comment.
*
* @param comment The comment that refers to some file contents. The comment may be a line comment
* or a ranged comment.
* @param fileData The file on which the comment appears.
* @return file contents referred to by the comment. If the comment is a line comment, the result
* will be a list of one string. Otherwise it will be a list of one or more strings.
*/
private List getLinesOfComment(Comment comment, PatchFile fileData) {
List lines = new ArrayList<>();
if (comment.lineNbr == 0) {
// file level comment has no line
return lines;
}
if (comment.range == null) {
lines.add(getLine(fileData, comment.side, comment.lineNbr));
} else {
lines.addAll(getLinesByRange(comment.range, fileData, comment.side));
}
return lines;
}
/**
* @return a shortened version of the given comment's message. Will be shortened to 100 characters
* or the first line, or following the last period within the first 100 characters, whichever
* is shorter. If the message is shortened, an ellipsis is appended.
*/
protected static String getShortenedCommentMessage(String message) {
int threshold = 100;
String fullMessage = message.trim();
String msg = fullMessage;
if (msg.length() > threshold) {
msg = msg.substring(0, threshold);
}
int lf = msg.indexOf('\n');
int period = msg.lastIndexOf('.');
if (lf > 0) {
// Truncate if a line feed appears within the threshold.
msg = msg.substring(0, lf);
} else if (period > 0) {
// Otherwise truncate if there is a period within the threshold.
msg = msg.substring(0, period + 1);
}
// Append an ellipsis if the message has been truncated.
if (!msg.equals(fullMessage)) {
msg += " […]";
}
return msg;
}
protected static String getShortenedCommentMessage(Comment comment) {
return getShortenedCommentMessage(comment.message);
}
/**
* @return grouped inline comment data mapped to data structures that are suitable for passing
* into Soy.
*/
private List> getCommentGroupsTemplateData(Repository repo) {
List> commentGroups = new ArrayList<>();
for (CommentSender.FileCommentGroup group : getGroupedInlineComments(repo)) {
Map groupData = new HashMap<>();
groupData.put("link", group.getLink());
groupData.put("title", group.getTitle());
groupData.put("patchSetId", group.patchSetId);
List> commentsList = new ArrayList<>();
for (Comment comment : group.comments) {
Map commentData = new HashMap<>();
commentData.put("lines", getLinesOfComment(comment, group.fileData));
commentData.put("message", comment.message.trim());
List blocks = CommentFormatter.parse(comment.message);
commentData.put("messageBlocks", commentBlocksToSoyData(blocks));
// Set the prefix.
String prefix = getCommentLinePrefix(comment);
commentData.put("linePrefix", prefix);
commentData.put("linePrefixEmpty", Strings.padStart(": ", prefix.length(), ' '));
// Set line numbers.
int startLine;
if (comment.range == null) {
startLine = comment.lineNbr;
} else {
startLine = comment.range.startLine;
commentData.put("endLine", comment.range.endLine);
}
commentData.put("startLine", startLine);
// Set the comment link.
if (comment.lineNbr == 0) {
commentData.put("link", group.getLink());
} else if (comment.side == 0) {
commentData.put("link", group.getLink() + "@a" + startLine);
} else {
commentData.put("link", group.getLink() + '@' + startLine);
}
// Set robot comment data.
if (comment instanceof RobotComment) {
RobotComment robotComment = (RobotComment) comment;
commentData.put("isRobotComment", true);
commentData.put("robotId", robotComment.robotId);
commentData.put("robotRunId", robotComment.robotRunId);
commentData.put("robotUrl", robotComment.url);
} else {
commentData.put("isRobotComment", false);
}
// If the comment has a quote, don't bother loading the parent message.
if (!hasQuote(blocks)) {
// Set parent comment info.
Optional parent = getParent(comment);
if (parent.isPresent()) {
commentData.put("parentMessage", getShortenedCommentMessage(parent.get()));
}
}
commentsList.add(commentData);
}
groupData.put("comments", commentsList);
commentGroups.add(groupData);
}
return commentGroups;
}
private List> commentBlocksToSoyData(List blocks) {
return blocks.stream()
.map(
b -> {
Map map = new HashMap<>();
switch (b.type) {
case PARAGRAPH:
map.put("type", "paragraph");
map.put("text", b.text);
break;
case PRE_FORMATTED:
map.put("type", "pre");
map.put("text", b.text);
break;
case QUOTE:
map.put("type", "quote");
map.put("quotedBlocks", commentBlocksToSoyData(b.quotedBlocks));
break;
case LIST:
map.put("type", "list");
map.put("items", b.items);
break;
}
return map;
})
.collect(toList());
}
private boolean hasQuote(List blocks) {
for (CommentFormatter.Block block : blocks) {
if (block.type == CommentFormatter.BlockType.QUOTE) {
return true;
}
}
return false;
}
private Repository getRepository() {
try {
return args.server.openRepository(projectState.getNameKey());
} catch (IOException e) {
return null;
}
}
@Override
protected void setupSoyContext() {
super.setupSoyContext();
boolean hasComments = false;
try (Repository repo = getRepository()) {
List> files = getCommentGroupsTemplateData(repo);
soyContext.put("commentFiles", files);
hasComments = !files.isEmpty();
}
soyContext.put(
"patchSetCommentBlocks", commentBlocksToSoyData(CommentFormatter.parse(patchSetComment)));
soyContext.put("labels", getLabelVoteSoyData(labels));
soyContext.put("commentCount", inlineComments.size());
soyContext.put("commentTimestamp", getCommentTimestamp());
soyContext.put(
"coverLetterBlocks", commentBlocksToSoyData(CommentFormatter.parse(getCoverLetter())));
footers.add("Gerrit-Comment-Date: " + getCommentTimestamp());
footers.add("Gerrit-HasComments: " + (hasComments ? "Yes" : "No"));
footers.add("Gerrit-HasLabels: " + (labels.isEmpty() ? "No" : "Yes"));
}
private String getLine(PatchFile fileInfo, short side, int lineNbr) {
try {
return fileInfo.getLine(side, lineNbr);
} catch (IOException err) {
// Default to the empty string if the file cannot be safely read.
log.warn("Failed to read file on side {}", side, err);
return "";
} catch (IndexOutOfBoundsException err) {
// Default to the empty string if the given line number does not appear
// in the file.
log.debug("Failed to get line number {} of file on side {}", lineNbr, side, err);
return "";
} catch (NoSuchEntityException err) {
// Default to the empty string if the side cannot be found.
log.warn("Side {} of file didn't exist", side, err);
return "";
}
}
private List> getLabelVoteSoyData(List votes) {
List> result = new ArrayList<>();
for (LabelVote vote : votes) {
Map data = new HashMap<>();
data.put("label", vote.label());
// Soy needs the short to be cast as an int for it to get converted to the
// correct tamplate type.
data.put("value", (int) vote.value());
result.add(data);
}
return result;
}
private String getCommentTimestamp() {
// Grouping is currently done by timestamp.
return MailUtil.rfcDateformatter.format(
ZonedDateTime.ofInstant(timestamp.toInstant(), ZoneId.of("UTC")));
}
@Override
protected boolean supportsHtml() {
return true;
}
}
