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	diff --git a/src/applications/differential/editor/DifferentialCommentEditor.php b/src/applications/differential/editor/DifferentialCommentEditor.php
	index db2e699410..8809d25f70 100644
	--- a/src/applications/differential/editor/DifferentialCommentEditor.php
	+++ b/src/applications/differential/editor/DifferentialCommentEditor.php
	@@ -1,680 +1,682 @@
	<?php

	/*
	* Copyright 2012 Facebook, 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.
	*/

	final class DifferentialCommentEditor extends PhabricatorEditor {

	protected $revision;
	protected $action;

	protected $attachInlineComments;
	protected $message;
	protected $changedByCommit;
	protected $addedReviewers = array();
	protected $removedReviewers = array();
	private $addedCCs = array();

	private $parentMessageID;
	private $contentSource;
	private $noEmail;

	private $isDaemonWorkflow;

	public function __construct(
	DifferentialRevision $revision,
	$action) {

	$this->revision = $revision;
	$this->action = $action;
	}

	public function setParentMessageID($parent_message_id) {
	$this->parentMessageID = $parent_message_id;
	return $this;
	}

	public function setMessage($message) {
	$this->message = $message;
	return $this;
	}

	public function setAttachInlineComments($attach) {
	$this->attachInlineComments = $attach;
	return $this;
	}

	public function setChangedByCommit($changed_by_commit) {
	$this->changedByCommit = $changed_by_commit;
	return $this;
	}

	public function getChangedByCommit() {
	return $this->changedByCommit;
	}

	public function setAddedReviewers(array $added_reviewers) {
	$this->addedReviewers = $added_reviewers;
	return $this;
	}

	public function getAddedReviewers() {
	return $this->addedReviewers;
	}

	public function setRemovedReviewers(array $removeded_reviewers) {
	$this->removedReviewers = $removeded_reviewers;
	return $this;
	}

	public function getRemovedReviewers() {
	return $this->removedReviewers;
	}

	public function setAddedCCs($added_ccs) {
	$this->addedCCs = $added_ccs;
	return $this;
	}

	public function getAddedCCs() {
	return $this->addedCCs;
	}

	public function setContentSource(PhabricatorContentSource $content_source) {
	$this->contentSource = $content_source;
	return $this;
	}

	public function setIsDaemonWorkflow($is_daemon) {
	$this->isDaemonWorkflow = $is_daemon;
	return $this;
	}

	public function setNoEmail($no_email) {
	$this->noEmail = $no_email;
	return $this;
	}

	public function save() {
	$actor = $this->requireActor();
	$revision = $this->revision;
	$action = $this->action;
	$actor_phid = $actor->getPHID();
	$actor_is_author = ($actor_phid == $revision->getAuthorPHID());
	$allow_self_accept = PhabricatorEnv::getEnvConfig(
	'differential.allow-self-accept', false);
	$always_allow_close = PhabricatorEnv::getEnvConfig(
	'differential.always-allow-close', false);
	$revision_status = $revision->getStatus();

	$revision->loadRelationships();
	$reviewer_phids = $revision->getReviewers();
	if ($reviewer_phids) {
	$reviewer_phids = array_combine($reviewer_phids, $reviewer_phids);
	}

	$metadata = array();

	$inline_comments = array();
	if ($this->attachInlineComments) {
	$inline_comments = id(new DifferentialInlineComment())->loadAllWhere(
	'authorPHID = %s AND revisionID = %d AND commentID IS NULL',
	$actor_phid,
	$revision->getID());
	}

	switch ($action) {
	case DifferentialAction::ACTION_COMMENT:
	if (!$this->message && !$inline_comments) {
	throw new DifferentialActionHasNoEffectException(
	"You are submitting an empty comment with no action: ".
	"you must act on the revision or post a comment.");
	}
	break;

	case DifferentialAction::ACTION_RESIGN:
	if ($actor_is_author) {
	throw new Exception('You can not resign from your own revision!');
	}
	if (empty($reviewer_phids[$actor_phid])) {
	throw new DifferentialActionHasNoEffectException(
	"You can not resign from this revision because you are not ".
	"a reviewer.");
	}
	DifferentialRevisionEditor::alterReviewers(
	$revision,
	$reviewer_phids,
	$rem = array($actor_phid),
	$add = array(),
	$actor_phid);
	break;

	case DifferentialAction::ACTION_ABANDON:
	if (!$actor_is_author) {
	throw new Exception('You can only abandon your own revisions.');
	}

	if ($revision_status == ArcanistDifferentialRevisionStatus::CLOSED) {
	throw new DifferentialActionHasNoEffectException(
	"You can not abandon this revision because it has already ".
	"been closed.");
	}

	if ($revision_status == ArcanistDifferentialRevisionStatus::ABANDONED) {
	throw new DifferentialActionHasNoEffectException(
	"You can not abandon this revision because it has already ".
	"been abandoned.");
	}

	$revision->setStatus(ArcanistDifferentialRevisionStatus::ABANDONED);
	break;

	case DifferentialAction::ACTION_ACCEPT:
	if ($actor_is_author && !$allow_self_accept) {
	throw new Exception('You can not accept your own revision.');
	}
	if (($revision_status !=
	ArcanistDifferentialRevisionStatus::NEEDS_REVIEW) &&
	($revision_status !=
	ArcanistDifferentialRevisionStatus::NEEDS_REVISION)) {

	switch ($revision_status) {
	case ArcanistDifferentialRevisionStatus::ACCEPTED:
	throw new DifferentialActionHasNoEffectException(
	"You can not accept this revision because someone else ".
	"already accepted it.");
	case ArcanistDifferentialRevisionStatus::ABANDONED:
	throw new DifferentialActionHasNoEffectException(
	"You can not accept this revision because it has been ".
	"abandoned.");
	case ArcanistDifferentialRevisionStatus::CLOSED:
	throw new DifferentialActionHasNoEffectException(
	"You can not accept this revision because it has already ".
	"been closed.");
	default:
	throw new Exception(
	"Unexpected revision state '{$revision_status}'!");
	}
	}

	$revision
	->setStatus(ArcanistDifferentialRevisionStatus::ACCEPTED);

	if (!isset($reviewer_phids[$actor_phid])) {
	DifferentialRevisionEditor::alterReviewers(
	$revision,
	$reviewer_phids,
	$rem = array(),
	$add = array($actor_phid),
	$actor_phid);
	}
	break;

	case DifferentialAction::ACTION_REQUEST:
	if (!$actor_is_author) {
	throw new Exception('You must own a revision to request review.');
	}

	switch ($revision_status) {
	case ArcanistDifferentialRevisionStatus::ACCEPTED:
	case ArcanistDifferentialRevisionStatus::NEEDS_REVISION:
	$revision->setStatus(
	ArcanistDifferentialRevisionStatus::NEEDS_REVIEW);
	break;
	case ArcanistDifferentialRevisionStatus::NEEDS_REVIEW:
	throw new DifferentialActionHasNoEffectException(
	"You can not request review of this revision because it has ".
	"been abandoned.");
	case ArcanistDifferentialRevisionStatus::ABANDONED:
	throw new DifferentialActionHasNoEffectException(
	"You can not request review of this revision because it has ".
	"been abandoned.");
	case ArcanistDifferentialRevisionStatus::CLOSED:
	throw new DifferentialActionHasNoEffectException(
	"You can not request review of this revision because it has ".
	"already been closed.");
	default:
	throw new Exception(
	"Unexpected revision state '{$revision_status}'!");
	}

	list($added_reviewers, $ignored) = $this->alterReviewers();
	if ($added_reviewers) {
	$key = DifferentialComment::METADATA_ADDED_REVIEWERS;
	$metadata[$key] = $added_reviewers;
	}

	break;

	case DifferentialAction::ACTION_REJECT:
	if ($actor_is_author) {
	throw new Exception(
	'You can not request changes to your own revision.');
	}

	switch ($revision_status) {
	case ArcanistDifferentialRevisionStatus::ACCEPTED:
	case ArcanistDifferentialRevisionStatus::NEEDS_REVISION:
	case ArcanistDifferentialRevisionStatus::NEEDS_REVIEW:
	// NOTE: We allow you to reject an already-rejected revision
	// because it doesn't create any ambiguity and avoids a rather
	// needless dialog.
	break;
	case ArcanistDifferentialRevisionStatus::ABANDONED:
	throw new DifferentialActionHasNoEffectException(
	"You can not request changes to this revision because it has ".
	"been abandoned.");
	case ArcanistDifferentialRevisionStatus::CLOSED:
	throw new DifferentialActionHasNoEffectException(
	"You can not request changes to this revision because it has ".
	"already been closed.");
	default:
	throw new Exception(
	"Unexpected revision state '{$revision_status}'!");
	}

	if (!isset($reviewer_phids[$actor_phid])) {
	DifferentialRevisionEditor::alterReviewers(
	$revision,
	$reviewer_phids,
	$rem = array(),
	$add = array($actor_phid),
	$actor_phid);
	}

	$revision
	->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVISION);
	break;

	case DifferentialAction::ACTION_RETHINK:
	if (!$actor_is_author) {
	throw new Exception(
	"You can not plan changes to somebody else's revision");
	}

	switch ($revision_status) {
	case ArcanistDifferentialRevisionStatus::ACCEPTED:
	case ArcanistDifferentialRevisionStatus::NEEDS_REVISION:
	case ArcanistDifferentialRevisionStatus::NEEDS_REVIEW:
	break;
	case ArcanistDifferentialRevisionStatus::ABANDONED:
	throw new DifferentialActionHasNoEffectException(
	"You can not plan changes to this revision because it has ".
	"been abandoned.");
	case ArcanistDifferentialRevisionStatus::CLOSED:
	throw new DifferentialActionHasNoEffectException(
	"You can not plan changes to this revision because it has ".
	"already been closed.");
	default:
	throw new Exception(
	"Unexpected revision state '{$revision_status}'!");
	}

	$revision
	->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVISION);
	break;

	case DifferentialAction::ACTION_RECLAIM:
	if (!$actor_is_author) {
	throw new Exception('You can not reclaim a revision you do not own.');
	}


	if ($revision_status != ArcanistDifferentialRevisionStatus::ABANDONED) {
	throw new DifferentialActionHasNoEffectException(
	"You can not reclaim this revision because it is not abandoned.");
	}

	$revision
	->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVIEW);
	break;

	case DifferentialAction::ACTION_CLOSE:

	// NOTE: The daemons can mark things closed from any state. We treat
	// them as completely authoritative.

	if (!$this->isDaemonWorkflow) {
	if (!$actor_is_author && !$always_allow_close) {
	throw new Exception(
	"You can not mark a revision you don't own as closed.");
	}

	$status_closed = ArcanistDifferentialRevisionStatus::CLOSED;
	$status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;

	if ($revision_status == $status_closed) {
	throw new DifferentialActionHasNoEffectException(
	"You can not mark this revision as closed because it has ".
	"already been marked as closed.");
	}

	if ($revision_status != $status_accepted) {
	throw new DifferentialActionHasNoEffectException(
	"You can not mark this revision as closed because it is ".
	"has not been accepted.");
	}
	}

	if (!$revision->getDateCommitted()) {
	$revision->setDateCommitted(time());
	}

	$revision->setStatus(ArcanistDifferentialRevisionStatus::CLOSED);
	break;

	case DifferentialAction::ACTION_ADDREVIEWERS:
	list($added_reviewers, $ignored) = $this->alterReviewers();

	if ($added_reviewers) {
	$key = DifferentialComment::METADATA_ADDED_REVIEWERS;
	$metadata[$key] = $added_reviewers;
	} else {
	$user_tried_to_add = count($this->getAddedReviewers());
	if ($user_tried_to_add == 0) {
	throw new DifferentialActionHasNoEffectException(
	"You can not add reviewers, because you did not specify any ".
	"reviewers.");
	} else if ($user_tried_to_add == 1) {
	throw new DifferentialActionHasNoEffectException(
	"You can not add that reviewer, because they are already an ".
	"author or reviewer.");
	} else {
	throw new DifferentialActionHasNoEffectException(
	"You can not add those reviewers, because they are all already ".
	"authors or reviewers.");
	}
	}

	break;
	case DifferentialAction::ACTION_ADDCCS:
	$added_ccs = $this->getAddedCCs();
	$user_tried_to_add = count($added_ccs);

	$added_ccs = $this->filterAddedCCs($added_ccs);

	if ($added_ccs) {
	foreach ($added_ccs as $cc) {
	DifferentialRevisionEditor::addCC(
	$revision,
	$cc,
	$actor_phid);
	}

	$key = DifferentialComment::METADATA_ADDED_CCS;
	$metadata[$key] = $added_ccs;

	} else {
	if ($user_tried_to_add == 0) {
	throw new DifferentialActionHasNoEffectException(
	"You can not add CCs, because you did not specify any ".
	"CCs.");
	} else if ($user_tried_to_add == 1) {
	throw new DifferentialActionHasNoEffectException(
	"You can not add that CC, because they are already an ".
	"author, reviewer or CC.");
	} else {
	throw new DifferentialActionHasNoEffectException(
	"You can not add those CCs, because they are all already ".
	"authors, reviewers or CCs.");
	}
	}
	break;
	case DifferentialAction::ACTION_CLAIM:
	if ($actor_is_author) {
	throw new Exception("You can not commandeer your own revision.");
	}

	switch ($revision_status) {
	case ArcanistDifferentialRevisionStatus::CLOSED:
	throw new DifferentialActionHasNoEffectException(
	"You can not commandeer this revision because it has ".
	"already been closed.");
	break;
	}

	$this->setAddedReviewers(array($revision->getAuthorPHID()));
	$this->setRemovedReviewers(array($actor_phid));

	// NOTE: Set the new author PHID before calling addReviewers(), since it
	// doesn't permit the author to become a reviewer.
	$revision->setAuthorPHID($actor_phid);

	list($added_reviewers, $removed_reviewers) = $this->alterReviewers();
	if ($added_reviewers) {
	$key = DifferentialComment::METADATA_ADDED_REVIEWERS;
	$metadata[$key] = $added_reviewers;
	}

	if ($removed_reviewers) {
	$key = DifferentialComment::METADATA_REMOVED_REVIEWERS;
	$metadata[$key] = $removed_reviewers;
	}

	break;
	default:
	throw new Exception('Unsupported action.');
	}

	// Update information about reviewer in charge.
	if ($action == DifferentialAction::ACTION_ACCEPT \|\|
	$action == DifferentialAction::ACTION_REJECT) {
	$revision->setLastReviewerPHID($actor_phid);
	}

	// TODO: Call beginReadLocking() prior to loading the revision.
	$revision->openTransaction();

	// Always save the revision (even if we didn't actually change any of its
	// properties) so that it jumps to the top of the revision list when sorted
	// by "updated". Notably, this allows "ping" comments to push it to the
	// top of the action list.
	$revision->save();

	if ($action != DifferentialAction::ACTION_RESIGN) {
	DifferentialRevisionEditor::addCC(
	$revision,
	$actor_phid,
	$actor_phid);
	}

	$comment = id(new DifferentialComment())
	->setAuthorPHID($actor_phid)
	->setRevisionID($revision->getID())
	->setAction($action)
	->setContent((string)$this->message)
	->setMetadata($metadata);

	if ($this->contentSource) {
	$comment->setContentSource($this->contentSource);
	}

	$comment->save();

	$changesets = array();
	if ($inline_comments) {
	$load_ids = mpull($inline_comments, 'getChangesetID');
	if ($load_ids) {
	$load_ids = array_unique($load_ids);
	$changesets = id(new DifferentialChangeset())->loadAllWhere(
	'id in (%Ld)',
	$load_ids);
	}
	foreach ($inline_comments as $inline) {
	$inline->setCommentID($comment->getID());
	$inline->save();
	}
	}

	// Find any "@mentions" in the comment blocks.
	$content_blocks = array($comment->getContent());
	foreach ($inline_comments as $inline) {
	$content_blocks[] = $inline->getContent();
	}
	$mention_ccs = PhabricatorMarkupEngine::extractPHIDsFromMentions(
	$content_blocks);
	if ($mention_ccs) {
	$mention_ccs = $this->filterAddedCCs($mention_ccs);
	if ($mention_ccs) {
	$metadata = $comment->getMetadata();
	$metacc = idx(
	$metadata,
	DifferentialComment::METADATA_ADDED_CCS,
	array());
	foreach ($mention_ccs as $cc_phid) {
	DifferentialRevisionEditor::addCC(
	$revision,
	$cc_phid,
	$actor_phid);
	$metacc[] = $cc_phid;
	}
	$metadata[DifferentialComment::METADATA_ADDED_CCS] = $metacc;

	$comment->setMetadata($metadata);
	$comment->save();
	}
	}

	$revision->saveTransaction();

	$phids = array($actor_phid);
	$handles = id(new PhabricatorObjectHandleData($phids))
	->loadHandles();
	$actor_handle = $handles[$actor_phid];

	$xherald_header = HeraldTranscript::loadXHeraldRulesHeader(
	$revision->getPHID());

	if (!$this->noEmail) {
	id(new DifferentialCommentMail(
	$revision,
	$actor_handle,
	$comment,
	$changesets,
	$inline_comments))
	->setExcludeMailRecipientPHIDs($this->getExcludeMailRecipientPHIDs())
	->setToPHIDs(
	array_merge(
	$revision->getReviewers(),
	array($revision->getAuthorPHID())))
	->setCCPHIDs($revision->getCCPHIDs())
	->setChangedByCommit($this->getChangedByCommit())
	->setXHeraldRulesHeader($xherald_header)
	->setParentMessageID($this->parentMessageID)
	->send();
	}

	$event_data = array(
	'revision_id' => $revision->getID(),
	'revision_phid' => $revision->getPHID(),
	'revision_name' => $revision->getTitle(),
	'revision_author_phid' => $revision->getAuthorPHID(),
	'action' => $comment->getAction(),
	'feedback_content' => $comment->getContent(),
	'actor_phid' => $actor_phid,
	);
	id(new PhabricatorTimelineEvent('difx', $event_data))
	->recordEvent();

	// TODO: Move to a daemon?
	id(new PhabricatorFeedStoryPublisher())
	->setStoryType(PhabricatorFeedStoryTypeConstants::STORY_DIFFERENTIAL)
	->setStoryData($event_data)
	->setStoryTime(time())
	->setStoryAuthorPHID($actor_phid)
	->setRelatedPHIDs(
	array(
	$revision->getPHID(),
	$actor_phid,
	$revision->getAuthorPHID(),
	))
	->setPrimaryObjectPHID($revision->getPHID())
	->setSubscribedPHIDs(
	array_merge(
	array($revision->getAuthorPHID()),
	$revision->getReviewers(),
	$revision->getCCPHIDs()))
	->publish();

	// TODO: Move to a daemon?
	PhabricatorSearchDifferentialIndexer::indexRevision($revision);

	return $comment;
	}

	private function filterAddedCCs(array $ccs) {
	$revision = $this->revision;

	$current_ccs = $revision->getCCPHIDs();
	$current_ccs = array_fill_keys($current_ccs, true);

	$reviewer_phids = $revision->getReviewers();
	$reviewer_phids = array_fill_keys($reviewer_phids, true);

	foreach ($ccs as $key => $cc) {
	if (isset($current_ccs[$cc])) {
	unset($ccs[$key]);
	}
	if (isset($reviewer_phids[$cc])) {
	unset($ccs[$key]);
	}
	if ($cc == $revision->getAuthorPHID()) {
	unset($ccs[$key]);
	}
	}

	return $ccs;
	}

	private function alterReviewers() {
	$actor_phid = $this->getActor()->getPHID();
	$revision = $this->revision;
	$added_reviewers = $this->getAddedReviewers();
	$removed_reviewers = $this->getRemovedReviewers();
	$reviewer_phids = $revision->getReviewers();
	+ $allow_self_accept = PhabricatorEnv::getEnvConfig(
	+ 'differential.allow-self-accept', false);

	$reviewer_phids_map = array_fill_keys($reviewer_phids, true);
	foreach ($added_reviewers as $k => $user_phid) {
	- if ($user_phid == $revision->getAuthorPHID()) {
	+ if (!$allow_self_accept && $user_phid == $revision->getAuthorPHID()) {
	unset($added_reviewers[$k]);
	}
	if (isset($reviewer_phids_map[$user_phid])) {
	unset($added_reviewers[$k]);
	}
	}

	foreach ($removed_reviewers as $k => $user_phid) {
	if (!isset($reviewer_phids_map[$user_phid])) {
	unset($removed_reviewers[$k]);
	}
	}

	$added_reviewers = array_unique($added_reviewers);
	$removed_reviewers = array_unique($removed_reviewers);

	if ($added_reviewers) {
	DifferentialRevisionEditor::alterReviewers(
	$revision,
	$reviewer_phids,
	$removed_reviewers,
	$added_reviewers,
	$actor_phid);
	}

	return array($added_reviewers, $removed_reviewers);
	}

	}

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