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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 com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.gerrit.entities.Patch.PATCHSET_LEVEL;
import static java.util.stream.Collectors.toList;
import com.google.common.base.Strings;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableList;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.common.data.FilenameComparator;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Comment;
import com.google.gerrit.entities.HumanComment;
import com.google.gerrit.entities.NotifyConfig.NotifyType;
import com.google.gerrit.entities.Patch;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.RobotComment;
import com.google.gerrit.entities.SubmitRequirement;
import com.google.gerrit.entities.SubmitRequirementResult;
import com.google.gerrit.exceptions.EmailException;
import com.google.gerrit.exceptions.NoSuchEntityException;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.mail.MailHeader;
import com.google.gerrit.mail.MailProcessingUtil;
import com.google.gerrit.server.CommentsUtil;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.mail.receive.Protocol;
import com.google.gerrit.server.patch.PatchFile;
import com.google.gerrit.server.patch.filediff.FileDiffOutput;
import com.google.gerrit.server.util.LabelVote;
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 org.apache.james.mime4j.dom.field.FieldName;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
/** Send comments, after the author of them hit used Publish Comments in the UI. */
public class CommentSender extends ReplyToChangeSender {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
public interface Factory {
CommentSender create(
Project.NameKey project,
Change.Id changeId,
ObjectId preUpdateMetaId,
Map postUpdateSubmitRequirementResults);
}
private class FileCommentGroup {
public String filename;
public int patchSetId;
public PatchFile fileData;
public List comments = new ArrayList<>();
/** Returns a web link to a comment for a change. */
@Nullable
public String getCommentLink(String uuid) {
return args.urlFormatter.get().getInlineCommentView(change, uuid).orElse(null);
}
/** Returns a web link to the comment tab view of a change. */
@Nullable
public String getCommentsTabLink() {
return args.urlFormatter.get().getCommentsTabView(change).orElse(null);
}
/** Returns a web link to the findings tab view of a change. */
@Nullable
public String getFindingsTabLink() {
return args.urlFormatter.get().getFindingsTabView(change).orElse(null);
}
/**
* Returns 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 if (Patch.PATCHSET_LEVEL.equals(filename)) {
return "Patchset";
} else {
return "File " + filename;
}
}
}
private List inlineComments = Collections.emptyList();
@Nullable private String patchSetComment;
private ImmutableList labels = ImmutableList.of();
private final CommentsUtil commentsUtil;
private final boolean incomingEmailEnabled;
private final String replyToAddress;
private final Supplier>
preUpdateSubmitRequirementResultsSupplier;
private final Map postUpdateSubmitRequirementResults;
@Inject
public CommentSender(
EmailArguments args,
CommentsUtil commentsUtil,
@GerritServerConfig Config cfg,
@Assisted Project.NameKey project,
@Assisted Change.Id changeId,
@Assisted ObjectId preUpdateMetaId,
@Assisted
Map postUpdateSubmitRequirementResults) {
super(args, "comment", newChangeData(args, project, changeId));
this.commentsUtil = commentsUtil;
this.incomingEmailEnabled =
cfg.getEnum("receiveemail", null, "protocol", Protocol.NONE).ordinal()
> Protocol.NONE.ordinal();
this.replyToAddress = cfg.getString("sendemail", null, "replyToAddress");
this.preUpdateSubmitRequirementResultsSupplier =
Suppliers.memoize(
() ->
// Triggers an (expensive) evaluation of the submit requirements. This is OK since
// all callers sent this email asynchronously, see EmailReviewComments.
newChangeData(args, project, changeId, preUpdateMetaId)
.submitRequirementsIncludingLegacy());
this.postUpdateSubmitRequirementResults = postUpdateSubmitRequirementResults;
}
public void setComments(List comments) {
inlineComments = comments;
}
public void setPatchSetComment(@Nullable String comment) {
this.patchSetComment = comment;
}
public void setLabels(ImmutableList labels) {
this.labels = labels;
}
@Override
protected void init() throws EmailException {
super.init();
if (notify.handling().equals(NotifyHandling.OWNER_REVIEWERS)
|| notify.handling().equals(NotifyHandling.ALL)) {
ccAllApprovals();
}
if (notify.handling().equals(NotifyHandling.ALL)) {
bccStarredBy();
includeWatchers(NotifyType.ALL_COMMENTS, !change.isWorkInProgress() && !change.isPrivate());
}
// Add header that enables identifying comments on parsed email.
// Grouping is currently done by timestamp.
setHeader(MailHeader.COMMENT_DATE.fieldName(), timestamp);
if (incomingEmailEnabled) {
if (replyToAddress == null) {
// Remove Reply-To and use outbound SMTP (default) instead.
removeHeader(FieldName.REPLY_TO);
} else {
setHeader(FieldName.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"));
}
}
/**
* Returns a list of FileCommentGroup objects representing the inline comments grouped by the
* file.
*/
private List getGroupedInlineComments(Repository repo) {
List groups = new ArrayList<>();
// 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;
// Get the modified files:
Map modifiedFiles = listModifiedFiles(c.key.patchSetId);
groups.add(currentGroup);
if (modifiedFiles != null && !modifiedFiles.isEmpty()) {
try {
currentGroup.fileData = new PatchFile(repo, modifiedFiles, c.key.filename);
} catch (IOException e) {
logger.atWarning().withCause(e).log(
"Cannot load %s from %s in %s",
c.key.filename,
modifiedFiles.values().iterator().next().newCommitId().name(),
projectState.getName());
currentGroup.fileData = null;
}
}
}
if (currentGroup.filename.equals(PATCHSET_LEVEL) || currentGroup.fileData != null) {
currentGroup.comments.add(c);
}
}
groups.sort(Comparator.comparing(g -> g.filename, FilenameComparator.INSTANCE));
return groups;
}
/** Get the set of accounts whose comments have been replied to in this email. */
private HashSet getReplyAccounts() {
HashSet replyAccounts = new HashSet<>();
// Track visited parent UUIDs to avoid cycles.
HashSet visitedUuids = new HashSet<>();
for (Comment comment : inlineComments) {
visitedUuids.add(comment.key.uuid);
// Traverse the parent relation to the top of the comment thread.
Comment current = comment;
while (current.parentUuid != null && !visitedUuids.contains(current.parentUuid)) {
Optional optParent = getParent(current);
if (!optParent.isPresent()) {
// There is a parent UUID, but it cannot be loaded, break from the comment thread.
break;
}
HumanComment parent = optParent.get();
replyAccounts.add(parent.author.getId());
visitedUuids.add(current.parentUuid);
current = parent;
}
}
return replyAccounts;
}
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();
}
/**
* Returns 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;
}
/**
* 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.getPublishedHumanComment(changeData.notes(), key);
} catch (StorageException e) {
logger.atWarning().log("Could not find the parent of this comment: %s", child);
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;
}
/**
* Returns 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);
}
/**
* Returns 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("title", group.getTitle());
groupData.put("patchSetId", group.patchSetId);
List> commentsList = new ArrayList<>();
for (Comment comment : group.comments) {
Map commentData = new HashMap<>();
if (group.fileData != null) {
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.key.filename.equals(Patch.PATCHSET_LEVEL)) {
if (comment instanceof RobotComment) {
commentData.put("link", group.getFindingsTabLink());
} else {
commentData.put("link", group.getCommentsTabLink());
}
} else {
commentData.put("link", group.getCommentLink(comment.key.uuid));
}
// 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;
}
@Nullable
private Repository getRepository() {
try {
return args.server.openRepository(projectState.getNameKey());
} catch (IOException e) {
return null;
}
}
@Override
protected void setupSoyContext() {
super.setupSoyContext();
boolean hasComments;
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())));
if (isChangeNoLongerSubmittable()) {
soyContext.put("unsatisfiedSubmitRequirements", formatUnsatisfiedSubmitRequirements());
soyContext.put(
"oldSubmitRequirements",
formatSubmitRequirments(preUpdateSubmitRequirementResultsSupplier.get()));
soyContext.put(
"newSubmitRequirements", formatSubmitRequirments(postUpdateSubmitRequirementResults));
}
footers.add(MailHeader.COMMENT_DATE.withDelimiter() + getCommentTimestamp());
footers.add(MailHeader.HAS_COMMENTS.withDelimiter() + (hasComments ? "Yes" : "No"));
footers.add(MailHeader.HAS_LABELS.withDelimiter() + (labels.isEmpty() ? "No" : "Yes"));
for (Account.Id account : getReplyAccounts()) {
footers.add(MailHeader.COMMENT_IN_REPLY_TO.withDelimiter() + getNameEmailFor(account));
}
}
/**
* Checks whether the change is no longer submittable.
*
* @return {@code true} if the change has been submittable before the update and is no longer
* submittable after the update has been applied, otherwise {@code false}
*/
private boolean isChangeNoLongerSubmittable() {
boolean isSubmittablePreUpdate =
preUpdateSubmitRequirementResultsSupplier.get().values().stream()
.allMatch(SubmitRequirementResult::fulfilled);
logger.atFine().log(
"the submitability of change %s before the update is %s",
change.getId(), isSubmittablePreUpdate);
if (!isSubmittablePreUpdate) {
return false;
}
boolean isSubmittablePostUpdate =
postUpdateSubmitRequirementResults.values().stream()
.allMatch(SubmitRequirementResult::fulfilled);
logger.atFine().log(
"the submitability of change %s after the update is %s",
change.getId(), isSubmittablePostUpdate);
return !isSubmittablePostUpdate;
}
private ImmutableList formatUnsatisfiedSubmitRequirements() {
return postUpdateSubmitRequirementResults.entrySet().stream()
.filter(e -> SubmitRequirementResult.Status.UNSATISFIED.equals(e.getValue().status()))
.map(Map.Entry::getKey)
.map(SubmitRequirement::name)
.sorted()
.collect(toImmutableList());
}
private static ImmutableList formatSubmitRequirments(
Map submitRequirementResults) {
return submitRequirementResults.entrySet().stream()
.map(
e -> {
if (e.getValue().errorMessage().isPresent()) {
return String.format(
"%s: %s (%s)",
e.getKey().name(),
e.getValue().status().name(),
e.getValue().errorMessage().get());
}
return String.format("%s: %s", e.getKey().name(), e.getValue().status().name());
})
.sorted()
.collect(toImmutableList());
}
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.
logger.atWarning().withCause(err).log("Failed to read file on side %d", side);
return "";
} catch (IndexOutOfBoundsException err) {
// Default to the empty string if the given line number does not appear
// in the file.
logger.atFine().withCause(err).log(
"Failed to get line number %d of file on side %d", lineNbr, side);
return "";
} catch (NoSuchEntityException err) {
// Default to the empty string if the side cannot be found.
logger.atWarning().withCause(err).log("Side %d of file didn't exist", side);
return "";
}
}
private ImmutableList> getLabelVoteSoyData(ImmutableList votes) {
ImmutableList.Builder> result = ImmutableList.builder();
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.build();
}
private String getCommentTimestamp() {
// Grouping is currently done by timestamp.
return MailProcessingUtil.rfcDateformatter.format(
ZonedDateTime.ofInstant(timestamp, ZoneId.of("UTC")));
}
}
