PhabricatorApplicationTransactionEditor.php
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PhabricatorApplicationTransactionEditor.php
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			<?php

			/**
			* @task mail Sending Mail
			* @task feed Publishing Feed Stories
			* @task search Search Index
			*/
			abstract class PhabricatorApplicationTransactionEditor
			extends PhabricatorEditor {

			private $contentSource;
			private $object;
			private $xactions;

			private $isNewObject;
			private $mentionedPHIDs;
			private $continueOnNoEffect;
			private $parentMessageID;
			private $subscribers;

			private $isPreview;

			/**
			* When the editor tries to apply transactions that have no effect, should
			* it raise an exception (default) or drop them and continue?
			*
			* Generally, you will set this flag for edits coming from "Edit" interfaces,
			* and leave it cleared for edits coming from "Comment" interfaces, so the
			* user will get a useful error if they try to submit a comment that does
			* nothing (e.g., empty comment with a status change that has already been
			* performed by another user).
			*
			* @param bool True to drop transactions without effect and continue.
			* @return this
			*/
			public function setContinueOnNoEffect($continue) {
			$this->continueOnNoEffect = $continue;
			return $this;
			}

			public function getContinueOnNoEffect() {
			return $this->continueOnNoEffect;
			}

			/**
			* Not strictly necessary, but reply handlers ideally set this value to
			* make email threading work better.
			*/
			public function setParentMessageID($parent_message_id) {
			$this->parentMessageID = $parent_message_id;
			return $this;
			}
			public function getParentMessageID() {
			return $this->parentMessageID;
			}

			protected function getIsNewObject() {
			return $this->isNewObject;
			}

			protected function getMentionedPHIDs() {
			return $this->mentionedPHIDs;
			}

			public function setIsPreview($is_preview) {
			$this->isPreview = $is_preview;
			return $this;
			}

			public function getIsPreview() {
			return $this->isPreview;
			}

			public function getTransactionTypes() {
			$types = array();

			if ($this->object instanceof PhabricatorSubscribableInterface) {
			$types[] = PhabricatorTransactions::TYPE_SUBSCRIBERS;
			}

			return $types;
			}

			private function adjustTransactionValues(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			$old = $this->getTransactionOldValue($object, $xaction);
			$xaction->setOldValue($old);

			$new = $this->getTransactionNewValue($object, $xaction);
			$xaction->setNewValue($new);
			}

			private function getTransactionOldValue(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_SUBSCRIBERS:
			return array_values($this->subscribers);
			case PhabricatorTransactions::TYPE_VIEW_POLICY:
			return $object->getViewPolicy();
			case PhabricatorTransactions::TYPE_EDIT_POLICY:
			return $object->getEditPolicy();
			case PhabricatorTransactions::TYPE_EDGE:
			$edge_type = $xaction->getMetadataValue('edge:type');
			if (!$edge_type) {
			throw new Exception("Edge transaction has no 'edge:type'!");
			}

			$old_edges = array();
			if ($object->getPHID()) {
			$edge_src = $object->getPHID();

			$old_edges = id(new PhabricatorEdgeQuery())
			->setViewer($this->getActor())
			->withSourcePHIDs(array($edge_src))
			->withEdgeTypes(array($edge_type))
			->needEdgeData(true)
			->execute();

			$old_edges = $old_edges[$edge_src][$edge_type];
			}
			return $old_edges;
			default:
			return $this->getCustomTransactionOldValue($object, $xaction);
			}
			}

			private function getTransactionNewValue(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_SUBSCRIBERS:
			return $this->getPHIDTransactionNewValue($xaction);
			case PhabricatorTransactions::TYPE_VIEW_POLICY:
			case PhabricatorTransactions::TYPE_EDIT_POLICY:
			return $xaction->getNewValue();
			case PhabricatorTransactions::TYPE_EDGE:
			return $this->getEdgeTransactionNewValue($xaction);
			default:
			return $this->getCustomTransactionNewValue($object, $xaction);
			}
			}

			protected function getCustomTransactionOldValue(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			throw new Exception("Capability not supported!");
			}

			protected function getCustomTransactionNewValue(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			throw new Exception("Capability not supported!");
			}

			protected function transactionHasEffect(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {

			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_COMMENT:
			return $xaction->hasComment();
			}

			return ($xaction->getOldValue() !== $xaction->getNewValue());
			}

			private function applyInternalEffects(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_VIEW_POLICY:
			$object->setViewPolicy($xaction->getNewValue());
			break;
			case PhabricatorTransactions::TYPE_EDIT_POLICY:
			$object->setEditPolicy($xaction->getNewValue());
			break;
			}
			return $this->applyCustomInternalTransaction($object, $xaction);
			}

			private function applyExternalEffects(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_SUBSCRIBERS:
			$subeditor = id(new PhabricatorSubscriptionsEditor())
			->setObject($object)
			->setActor($this->requireActor());

			$old_map = array_fuse($xaction->getOldValue());
			$new_map = array_fuse($xaction->getNewValue());

			$subeditor->unsubscribe(
			array_keys(
			array_diff_key($old_map, $new_map)));

			$subeditor->subscribeExplicit(
			array_keys(
			array_diff_key($new_map, $old_map)));

			$subeditor->save();
			break;
			case PhabricatorTransactions::TYPE_EDGE:
			$old = $xaction->getOldValue();
			$new = $xaction->getNewValue();
			$src = $object->getPHID();
			$type = $xaction->getMetadataValue('edge:type');

			foreach ($new as $dst_phid => $edge) {
			$new[$dst_phid]['src'] = $src;
			}

			$editor = id(new PhabricatorEdgeEditor())
			->setActor($this->getActor());

			foreach ($old as $dst_phid => $edge) {
			if (!empty($new[$dst_phid])) {
			if ($old[$dst_phid]['data'] === $new[$dst_phid]['data']) {
			continue;
			}
			}
			$editor->removeEdge($src, $type, $dst_phid);
			}

			foreach ($new as $dst_phid => $edge) {
			if (!empty($old[$dst_phid])) {
			if ($old[$dst_phid]['data'] === $new[$dst_phid]['data']) {
			continue;
			}
			}

			$data = array(
			'data' => $edge['data'],
			);

			$editor->addEdge($src, $type, $dst_phid, $data);
			}

			$editor->save();
			break;
			}

			return $this->applyCustomExternalTransaction($object, $xaction);
			}

			protected function applyCustomInternalTransaction(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			throw new Exception("Capability not supported!");
			}

			protected function applyCustomExternalTransaction(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			throw new Exception("Capability not supported!");
			}

			protected function applyFinalEffects(
			PhabricatorLiskDAO $object,
			array $xactions) {
			}

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

			public function setContentSourceFromRequest(AphrontRequest $request) {
			return $this->setContentSource(
			PhabricatorContentSource::newFromRequest($request));
			}

			public function getContentSource() {
			return $this->contentSource;
			}

			final public function applyTransactions(
			PhabricatorLiskDAO $object,
			array $xactions) {

			$this->object = $object;
			$this->xactions = $xactions;
			$this->isNewObject = ($object->getPHID() === null);

			$this->validateEditParameters($object, $xactions);

			$actor = $this->requireActor();

			if ($object->getPHID() &&
			($object instanceof PhabricatorSubscribableInterface)) {
			$subs = PhabricatorSubscribersQuery::loadSubscribersForPHID(
			$object->getPHID());
			$this->subscribers = array_fuse($subs);
			} else {
			$this->subscribers = array();
			}

			$xactions = $this->applyImplicitCC($object, $xactions);

			$mention_xaction = $this->buildMentionTransaction($object, $xactions);
			if ($mention_xaction) {
			$xactions[] = $mention_xaction;
			}

			$xactions = $this->combineTransactions($xactions);

			foreach ($xactions as $xaction) {
			// TODO: This needs to be more sophisticated once we have meta-policies.
			$xaction->setViewPolicy(PhabricatorPolicies::POLICY_PUBLIC);
			$xaction->setEditPolicy($actor->getPHID());

			$xaction->setAuthorPHID($actor->getPHID());
			$xaction->setContentSource($this->getContentSource());
			}

			$is_preview = $this->getIsPreview();
			$read_locking = false;

			if (!$is_preview && $object->getID()) {
			foreach ($xactions as $xaction) {

			// If any of the transactions require a read lock, hold one and reload
			// the object. We need to do this fairly early so that the call to
			// `adjustTransactionValues()` (which populates old values) is based
			// on the synchronized state of the object, which may differ from the
			// state when it was originally loaded.

			if ($this->shouldReadLock($object, $xaction)) {
			$object->openTransaction();
			$object->beginReadLocking();
			$read_locking = true;
			$object->reload();
			break;
			}
			}
			}

			foreach ($xactions as $xaction) {
			$this->adjustTransactionValues($object, $xaction);
			}

			$xactions = $this->filterTransactions($object, $xactions);

			if (!$xactions) {
			if ($read_locking) {
			$object->endReadLocking();
			$read_locking = false;
			$object->killTransaction();
			}
			return array();
			}

			$xactions = $this->sortTransactions($xactions);

			if ($is_preview) {
			$this->loadHandles($xactions);
			return $xactions;
			}

			$comment_editor = id(new PhabricatorApplicationTransactionCommentEditor())
			->setActor($actor)
			->setContentSource($this->getContentSource());

			if (!$read_locking) {
			$object->openTransaction();
			}

			foreach ($xactions as $xaction) {
			$this->applyInternalEffects($object, $xaction);
			}

			$object->save();

			foreach ($xactions as $xaction) {
			$xaction->setObjectPHID($object->getPHID());
			if ($xaction->getComment()) {
			$xaction->setPHID($xaction->generatePHID());
			$comment_editor->applyEdit($xaction, $xaction->getComment());
			} else {
			$xaction->save();
			}
			}

			foreach ($xactions as $xaction) {
			$this->applyExternalEffects($object, $xaction);
			}

			$this->applyFinalEffects($object, $xactions);

			if ($read_locking) {
			$object->endReadLocking();
			$read_locking = false;
			}

			$object->saveTransaction();

			$this->loadHandles($xactions);

			$mail = null;
			if ($this->supportsMail()) {
			$mail = $this->sendMail($object, $xactions);
			}

			if ($this->supportsSearch()) {
			id(new PhabricatorSearchIndexer())
			->indexDocumentByPHID($object->getPHID());
			}

			if ($this->supportsFeed()) {
			$mailed = array();
			if ($mail) {
			$mailed = $mail->buildRecipientList();
			}
			$this->publishFeedStory(
			$object,
			$xactions,
			$mailed);
			}

			$this->didApplyTransactions($xactions);

			return $xactions;
			}

			protected function didApplyTransactions(array $xactions) {
			// Hook for subclasses.
			return;
			}


			/**
			* Determine if the editor should hold a read lock on the object while
			* applying a transaction.
			*
			* If the editor does not hold a lock, two editors may read an object at the
			* same time, then apply their changes without any synchronization. For most
			* transactions, this does not matter much. However, it is important for some
			* transactions. For example, if an object has a transaction count on it, both
			* editors may read the object with `count = 23`, then independently update it
			* and save the object with `count = 24` twice. This will produce the wrong
			* state: the object really has 25 transactions, but the count is only 24.
			*
			* Generally, transactions fall into one of four buckets:
			*
			* - Append operations: Actions like adding a comment to an object purely
			* add information to its state, and do not depend on the current object
			* state in any way. These transactions never need to hold locks.
			* - Overwrite operations: Actions like changing the title or description
			* of an object replace the current value with a new value, so the end
			* state is consistent without a lock. We currently do not lock these
			* transactions, although we may in the future.
			* - Edge operations: Edge and subscription operations have internal
			* synchronization which limits the damage race conditions can cause.
			* We do not currently lock these transactions, although we may in the
			* future.
			* - Update operations: Actions like incrementing a count on an object.
			* These operations generally should use locks, unless it is not
			* important that the state remain consistent in the presence of races.
			*
			* @param PhabricatorLiskDAO Object being updated.
			* @param PhabricatorApplicationTransaction Transaction being applied.
			* @return bool True to synchronize the edit with a lock.
			*/
			protected function shouldReadLock(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {
			return false;
			}

			private function loadHandles(array $xactions) {
			$phids = array();
			foreach ($xactions as $key => $xaction) {
			$phids[$key] = $xaction->getRequiredHandlePHIDs();
			}
			$handles = array();
			$merged = array_mergev($phids);
			if ($merged) {
			$handles = id(new PhabricatorObjectHandleData($merged))
			->setViewer($this->requireActor())
			->loadHandles();
			}
			foreach ($xactions as $key => $xaction) {
			$xaction->setHandles(array_select_keys($handles, $phids[$key]));
			}
			}

			private function validateEditParameters(
			PhabricatorLiskDAO $object,
			array $xactions) {

			if (!$this->getContentSource()) {
			throw new Exception(
			"Call setContentSource() before applyTransactions()!");
			}

			// Do a bunch of sanity checks that the incoming transactions are fresh.
			// They should be unsaved and have only "transactionType" and "newValue"
			// set.

			$types = array_fill_keys($this->getTransactionTypes(), true);

			assert_instances_of($xactions, 'PhabricatorApplicationTransaction');
			foreach ($xactions as $xaction) {
			if ($xaction->getPHID() \|\| $xaction->getID()) {
			throw new Exception(
			"You can not apply transactions which already have IDs/PHIDs!");
			}
			if ($xaction->getObjectPHID()) {
			throw new Exception(
			"You can not apply transactions which already have objectPHIDs!");
			}
			if ($xaction->getAuthorPHID()) {
			throw new Exception(
			"You can not apply transactions which already have authorPHIDs!");
			}
			if ($xaction->getCommentPHID()) {
			throw new Exception(
			"You can not apply transactions which already have commentPHIDs!");
			}
			if ($xaction->getCommentVersion() !== 0) {
			throw new Exception(
			"You can not apply transactions which already have commentVersions!");
			}
			if ($xaction->getOldValue() !== null) {
			throw new Exception(
			"You can not apply transactions which already have oldValue!");
			}

			$type = $xaction->getTransactionType();
			if (empty($types[$type])) {
			throw new Exception("Transaction has unknown type '{$type}'.");
			}
			}

			// The actor must have permission to view and edit the object.

			$actor = $this->requireActor();

			PhabricatorPolicyFilter::requireCapability(
			$actor,
			$xaction,
			PhabricatorPolicyCapability::CAN_VIEW);

			PhabricatorPolicyFilter::requireCapability(
			$actor,
			$xaction,
			PhabricatorPolicyCapability::CAN_EDIT);
			}

			private function buildMentionTransaction(
			PhabricatorLiskDAO $object,
			array $xactions) {

			if (!($object instanceof PhabricatorSubscribableInterface)) {
			return null;
			}

			$texts = array();
			foreach ($xactions as $xaction) {
			$texts[] = $this->getMentionableTextsFromTransaction($xaction);
			}
			$texts = array_mergev($texts);

			$phids = PhabricatorMarkupEngine::extractPHIDsFromMentions($texts);

			$this->mentionedPHIDs = $phids;

			if ($object->getPHID()) {
			// Don't try to subscribe already-subscribed mentions: we want to generate
			// a dialog about an action having no effect if the user explicitly adds
			// existing CCs, but not if they merely mention existing subscribers.
			$phids = array_diff($phids, $this->subscribers);
			}

			foreach ($phids as $key => $phid) {
			if ($object->isAutomaticallySubscribed($phid)) {
			unset($phids[$key]);
			}
			}
			$phids = array_values($phids);

			if (!$phids) {
			return null;
			}

			$xaction = newv(get_class(head($xactions)), array());
			$xaction->setTransactionType(PhabricatorTransactions::TYPE_SUBSCRIBERS);
			$xaction->setNewValue(array('+' => $phids));

			return $xaction;
			}

			protected function getMentionableTextsFromTransaction(
			PhabricatorApplicationTransaction $transaction) {
			$texts = array();
			if ($transaction->getComment()) {
			$texts[] = $transaction->getComment()->getContent();
			}
			return $texts;
			}

			protected function mergeTransactions(
			PhabricatorApplicationTransaction $u,
			PhabricatorApplicationTransaction $v) {

			$type = $u->getTransactionType();

			switch ($type) {
			case PhabricatorTransactions::TYPE_SUBSCRIBERS:
			return $this->mergePHIDOrEdgeTransactions($u, $v);
			case PhabricatorTransactions::TYPE_EDGE:
			$u_type = $u->getMetadataValue('edge:type');
			$v_type = $v->getMetadataValue('edge:type');
			if ($u_type == $v_type) {
			return $this->mergePHIDOrEdgeTransactions($u, $v);
			}
			return null;
			}

			// By default, do not merge the transactions.
			return null;
			}


			/**
			* Attempt to combine similar transactions into a smaller number of total
			* transactions. For example, two transactions which edit the title of an
			* object can be merged into a single edit.
			*/
			private function combineTransactions(array $xactions) {
			$stray_comments = array();

			$result = array();
			$types = array();
			foreach ($xactions as $key => $xaction) {
			$type = $xaction->getTransactionType();
			if (isset($types[$type])) {
			foreach ($types[$type] as $other_key) {
			$merged = $this->mergeTransactions($result[$other_key], $xaction);
			if ($merged) {
			$result[$other_key] = $merged;

			if ($xaction->getComment() &&
			($xaction->getComment() !== $merged->getComment())) {
			$stray_comments[] = $xaction->getComment();
			}

			if ($result[$other_key]->getComment() &&
			($result[$other_key]->getComment() !== $merged->getComment())) {
			$stray_comments[] = $result[$other_key]->getComment();
			}

			// Move on to the next transaction.
			continue 2;
			}
			}
			}
			$result[$key] = $xaction;
			$types[$type][] = $key;
			}

			// If we merged any comments away, restore them.
			foreach ($stray_comments as $comment) {
			$xaction = newv(get_class(head($result)), array());
			$xaction->setTransactionType(PhabricatorTransactions::TYPE_COMMENT);
			$xaction->setComment($comment);
			$result[] = $xaction;
			}

			return array_values($result);
			}

			protected function mergePHIDOrEdgeTransactions(
			PhabricatorApplicationTransaction $u,
			PhabricatorApplicationTransaction $v) {

			$result = $u->getNewValue();
			foreach ($v->getNewValue() as $key => $value) {
			$result[$key] = array_merge($value, idx($result, $key, array()));
			}
			$u->setNewValue($result);

			return $u;
			}

			protected function getPHIDTransactionNewValue(
			PhabricatorApplicationTransaction $xaction) {

			$old = array_fuse($xaction->getOldValue());

			$new = $xaction->getNewValue();
			$new_add = idx($new, '+', array());
			unset($new['+']);
			$new_rem = idx($new, '-', array());
			unset($new['-']);
			$new_set = idx($new, '=', null);
			if ($new_set !== null) {
			$new_set = array_fuse($new_set);
			}
			unset($new['=']);

			if ($new) {
			throw new Exception(
			"Invalid 'new' value for PHID transaction. Value should contain only ".
			"keys '+' (add PHIDs), '-' (remove PHIDs) and '=' (set PHIDS).");
			}

			$result = array();

			foreach ($old as $phid) {
			if ($new_set !== null && empty($new_set[$phid])) {
			continue;
			}
			$result[$phid] = $phid;
			}

			if ($new_set !== null) {
			foreach ($new_set as $phid) {
			$result[$phid] = $phid;
			}
			}

			foreach ($new_add as $phid) {
			$result[$phid] = $phid;
			}

			foreach ($new_rem as $phid) {
			unset($result[$phid]);
			}

			return array_values($result);
			}

			protected function getEdgeTransactionNewValue(
			PhabricatorApplicationTransaction $xaction) {

			$new = $xaction->getNewValue();
			$new_add = idx($new, '+', array());
			unset($new['+']);
			$new_rem = idx($new, '-', array());
			unset($new['-']);
			$new_set = idx($new, '=', null);
			unset($new['=']);

			if ($new) {
			throw new Exception(
			"Invalid 'new' value for Edge transaction. Value should contain only ".
			"keys '+' (add edges), '-' (remove edges) and '=' (set edges).");
			}

			$old = $xaction->getOldValue();

			$lists = array($new_set, $new_add, $new_rem);
			foreach ($lists as $list) {
			$this->checkEdgeList($list);
			}

			$result = array();
			foreach ($old as $dst_phid => $edge) {
			if ($new_set !== null && empty($new_set[$dst_phid])) {
			continue;
			}
			$result[$dst_phid] = $this->normalizeEdgeTransactionValue(
			$xaction,
			$edge);
			}

			if ($new_set !== null) {
			foreach ($new_set as $dst_phid => $edge) {
			$result[$dst_phid] = $this->normalizeEdgeTransactionValue(
			$xaction,
			$edge);
			}
			}

			foreach ($new_add as $dst_phid => $edge) {
			$result[$dst_phid] = $this->normalizeEdgeTransactionValue(
			$xaction,
			$edge);
			}

			foreach ($new_rem as $dst_phid => $edge) {
			unset($result[$dst_phid]);
			}

			return $result;
			}

			private function checkEdgeList($list) {
			if (!$list) {
			return;
			}
			foreach ($list as $key => $item) {
			if (phid_get_type($key) === PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN) {
			throw new Exception(
			"Edge transactions must have destination PHIDs as in edge ".
			"lists (found key '{$key}').");
			}
			if (!is_array($item) && $item !== $key) {
			throw new Exception(
			"Edge transactions must have PHIDs or edge specs as values ".
			"(found value '{$item}').");
			}
			}
			}

			protected function normalizeEdgeTransactionValue(
			PhabricatorApplicationTransaction $xaction,
			$edge) {

			if (!is_array($edge)) {
			$edge = array(
			'dst' => $edge,
			);
			}

			$edge_type = $xaction->getMetadataValue('edge:type');

			if (empty($edge['type'])) {
			$edge['type'] = $edge_type;
			} else {
			if ($edge['type'] != $edge_type) {
			$this_type = $edge['type'];
			throw new Exception(
			"Edge transaction includes edge of type '{$this_type}', but ".
			"transaction is of type '{$edge_type}'. Each edge transaction must ".
			"alter edges of only one type.");
			}
			}

			if (!isset($edge['data'])) {
			$edge['data'] = null;
			}

			return $edge;
			}

			protected function sortTransactions(array $xactions) {
			$head = array();
			$tail = array();

			// Move bare comments to the end, so the actions precede them.
			foreach ($xactions as $xaction) {
			$type = $xaction->getTransactionType();
			if ($type == PhabricatorTransactions::TYPE_COMMENT) {
			$tail[] = $xaction;
			} else {
			$head[] = $xaction;
			}
			}

			return array_values(array_merge($head, $tail));
			}


			protected function filterTransactions(
			PhabricatorLiskDAO $object,
			array $xactions) {

			$type_comment = PhabricatorTransactions::TYPE_COMMENT;

			$no_effect = array();
			$has_comment = false;
			$any_effect = false;
			foreach ($xactions as $key => $xaction) {
			if ($this->transactionHasEffect($object, $xaction)) {
			if ($xaction->getTransactionType() != $type_comment) {
			$any_effect = true;
			}
			} else {
			$no_effect[$key] = $xaction;
			}
			if ($xaction->hasComment()) {
			$has_comment = true;
			}
			}

			if (!$no_effect) {
			return $xactions;
			}

			if (!$this->getContinueOnNoEffect() && !$this->getIsPreview()) {
			throw new PhabricatorApplicationTransactionNoEffectException(
			$no_effect,
			$any_effect,
			$has_comment);
			}

			if (!$any_effect && !$has_comment) {
			// If we only have empty comment transactions, just drop them all.
			return array();
			}

			foreach ($no_effect as $key => $xaction) {
			if ($xaction->getComment()) {
			$xaction->setTransactionType($type_comment);
			$xaction->setOldValue(null);
			$xaction->setNewValue(null);
			} else {
			unset($xactions[$key]);
			}
			}

			return $xactions;
			}


			/* -( Implicit CCs )------------------------------------------------------- */


			/**
			* When a user interacts with an object, we might want to add them to CC.
			*/
			final public function applyImplicitCC(
			PhabricatorLiskDAO $object,
			array $xactions) {

			if (!($object instanceof PhabricatorSubscribableInterface)) {
			// If the object isn't subscribable, we can't CC them.
			return $xactions;
			}

			$actor_phid = $this->requireActor()->getPHID();
			if ($object->isAutomaticallySubscribed($actor_phid)) {
			// If they're auto-subscribed, don't CC them.
			return $xactions;
			}

			$should_cc = false;
			foreach ($xactions as $xaction) {
			if ($this->shouldImplyCC($object, $xaction)) {
			$should_cc = true;
			break;
			}
			}

			if (!$should_cc) {
			// Only some types of actions imply a CC (like adding a comment).
			return $xactions;
			}

			if ($object->getPHID()) {
			if (isset($this->subscribers[$actor_phid])) {
			// If the user is already subscribed, don't implicitly CC them.
			return $xactions;
			}

			$unsub = PhabricatorEdgeQuery::loadDestinationPHIDs(
			$object->getPHID(),
			PhabricatorEdgeConfig::TYPE_OBJECT_HAS_UNSUBSCRIBER);
			$unsub = array_fuse($unsub);
			if (isset($unsub[$actor_phid])) {
			// If the user has previously unsubscribed from this object explicitly,
			// don't implicitly CC them.
			return $xactions;
			}
			}

			$xaction = newv(get_class(head($xactions)), array());
			$xaction->setTransactionType(PhabricatorTransactions::TYPE_SUBSCRIBERS);
			$xaction->setNewValue(array('+' => array($actor_phid)));

			array_unshift($xactions, $xaction);

			return $xactions;
			}

			protected function shouldImplyCC(
			PhabricatorLiskDAO $object,
			PhabricatorApplicationTransaction $xaction) {

			switch ($xaction->getTransactionType()) {
			case PhabricatorTransactions::TYPE_COMMENT:
			return true;
			default:
			return false;
			}
			}


			/* -( Sending Mail )------------------------------------------------------- */


			/**
			* @task mail
			*/
			protected function supportsMail() {
			return false;
			}


			/**
			* @task mail
			*/
			protected function sendMail(
			PhabricatorLiskDAO $object,
			array $xactions) {

			$email_to = $this->getMailTo($object);
			$email_cc = $this->getMailCC($object);

			$phids = array_merge($email_to, $email_cc);
			$handles = id(new PhabricatorObjectHandleData($phids))
			->setViewer($this->requireActor())
			->loadHandles();

			$template = $this->buildMailTemplate($object);
			$body = $this->buildMailBody($object, $xactions);

			$mail_tags = $this->getMailTags($object, $xactions);

			$action = $this->getStrongestAction($object, $xactions)->getActionName();

			$template
			->setFrom($this->requireActor()->getPHID())
			->setSubjectPrefix($this->getMailSubjectPrefix())
			->setVarySubjectPrefix('['.$action.']')
			->setThreadID($object->getPHID(), $this->getIsNewObject())
			->setRelatedPHID($object->getPHID())
			->setExcludeMailRecipientPHIDs($this->getExcludeMailRecipientPHIDs())
			->setMailTags($mail_tags)
			->setIsBulk(true)
			->setBody($body->render());

			if ($this->getParentMessageID()) {
			$template->setParentMessageID($this->getParentMessageID());
			}

			$mails = $this
			->buildReplyHandler($object)
			->multiplexMail(
			$template,
			array_select_keys($handles, $email_to),
			array_select_keys($handles, $email_cc));

			foreach ($mails as $mail) {
			$mail->saveAndSend();
			}

			$template->addTos($email_to);
			$template->addCCs($email_cc);

			return $template;
			}


			/**
			* @task mail
			*/
			protected function getStrongestAction(
			PhabricatorLiskDAO $object,
			array $xactions) {
			return last(msort($xactions, 'getActionStrength'));
			}


			/**
			* @task mail
			*/
			protected function buildReplyHandler(PhabricatorLiskDAO $object) {
			throw new Exception("Capability not supported.");
			}


			/**
			* @task mail
			*/
			protected function getMailSubjectPrefix() {
			throw new Exception("Capability not supported.");
			}


			/**
			* @task mail
			*/
			protected function getMailTags(
			PhabricatorLiskDAO $object,
			array $xactions) {
			$tags = array();

			foreach ($xactions as $xaction) {
			$tags[] = $xaction->getMailTags();
			}

			return array_mergev($tags);
			}


			/**
			* @task mail
			*/
			protected function buildMailTemplate(PhabricatorLiskDAO $object) {
			throw new Exception("Capability not supported.");
			}


			/**
			* @task mail
			*/
			protected function getMailTo(PhabricatorLiskDAO $object) {
			throw new Exception("Capability not supported.");
			}


			/**
			* @task mail
			*/
			protected function getMailCC(PhabricatorLiskDAO $object) {
			if ($object instanceof PhabricatorSubscribableInterface) {
			return $this->subscribers;
			}
			throw new Exception("Capability not supported.");
			}


			/**
			* @task mail
			*/
			protected function buildMailBody(
			PhabricatorLiskDAO $object,
			array $xactions) {

			$headers = array();
			$comments = array();

			foreach ($xactions as $xaction) {
			$headers[] = id(clone $xaction)->setRenderingTarget('text')->getTitle();
			$comment = $xaction->getComment();
			if ($comment && strlen($comment->getContent())) {
			$comments[] = $comment->getContent();
			}
			}

			$body = new PhabricatorMetaMTAMailBody();
			$body->addRawSection(implode("\n", $headers));

			foreach ($comments as $comment) {
			$body->addRawSection($comment);
			}

			return $body;
			}


			/* -( Publishing Feed Stories )-------------------------------------------- */


			/**
			* @task feed
			*/
			protected function supportsFeed() {
			return false;
			}


			/**
			* @task feed
			*/
			protected function getFeedStoryType() {
			return 'PhabricatorApplicationTransactionFeedStory';
			}


			/**
			* @task feed
			*/
			protected function getFeedRelatedPHIDs(
			PhabricatorLiskDAO $object,
			array $xactions) {

			return array(
			$object->getPHID(),
			$this->requireActor()->getPHID(),
			);
			}


			/**
			* @task feed
			*/
			protected function getFeedNotifyPHIDs(
			PhabricatorLiskDAO $object,
			array $xactions) {

			return array_merge(
			$this->getMailTo($object),
			$this->getMailCC($object));
			}


			/**
			* @task feed
			*/
			protected function getFeedStoryData(
			PhabricatorLiskDAO $object,
			array $xactions) {

			$xactions = msort($xactions, 'getActionStrength');
			$xactions = array_reverse($xactions);

			return array(
			'objectPHID' => $object->getPHID(),
			'transactionPHIDs' => mpull($xactions, 'getPHID'),
			);
			}


			/**
			* @task feed
			*/
			protected function publishFeedStory(
			PhabricatorLiskDAO $object,
			array $xactions,
			array $mailed_phids) {

			$related_phids = $this->getFeedRelatedPHIDs($object, $xactions);
			$subscribed_phids = $this->getFeedNotifyPHIDs($object, $xactions);

			$story_type = $this->getFeedStoryType();
			$story_data = $this->getFeedStoryData($object, $xactions);

			id(new PhabricatorFeedStoryPublisher())
			->setStoryType($story_type)
			->setStoryData($story_data)
			->setStoryTime(time())
			->setStoryAuthorPHID($this->requireActor()->getPHID())
			->setRelatedPHIDs($related_phids)
			->setPrimaryObjectPHID($object->getPHID())
			->setSubscribedPHIDs($subscribed_phids)
			->setMailRecipientPHIDs($mailed_phids)
			->publish();
			}


			/* -( Search Index )------------------------------------------------------- */


			/**
			* @task search
			*/
			protected function supportsSearch() {
			return false;
			}

			}

phab/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php5d1f94ac8a2cstable

PhabricatorApplicationTransactionEditor.phpView Options

phab/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
5d1f94ac8a2cstable

PhabricatorApplicationTransactionEditor.php
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