DifferentialManiphestTasksFieldSpecification.php
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	<?php

	final class DifferentialManiphestTasksFieldSpecification
	extends DifferentialFieldSpecification {

	private $oldManiphestTasks = array();
	private $maniphestTasks = array();

	public function shouldAppearOnRevisionView() {
	return PhabricatorEnv::getEnvConfig('maniphest.enabled');
	}

	public function getRequiredHandlePHIDsForRevisionView() {
	return $this->getManiphestTaskPHIDs();
	}

	public function renderLabelForRevisionView() {
	return 'Maniphest Tasks:';
	}

	public function renderValueForRevisionView() {
	$task_phids = $this->getManiphestTaskPHIDs();
	if (!$task_phids) {
	return null;
	}

	$links = array();
	foreach ($task_phids as $task_phid) {
	$links[] = $this->getHandle($task_phid)->renderLink();
	}

	return phutil_implode_html(phutil_tag('br'), $links);
	}

	private function getManiphestTaskPHIDs() {
	$revision = $this->getRevision();
	if (!$revision->getPHID()) {
	return array();
	}
	return PhabricatorEdgeQuery::loadDestinationPHIDs(
	$revision->getPHID(),
	PhabricatorEdgeConfig::TYPE_DREV_HAS_RELATED_TASK);
	}

	/**
	* Attach the revision to the task(s) and the task(s) to the revision.
	*
	* @return void
	*/
	public function didWriteRevision(DifferentialRevisionEditor $editor) {
	$revision = $editor->getRevision();
	$revision_phid = $revision->getPHID();
	$edge_type = PhabricatorEdgeConfig::TYPE_DREV_HAS_RELATED_TASK;

	$old_phids = $this->oldManiphestTasks;
	$add_phids = $this->maniphestTasks;
	$rem_phids = array_diff($old_phids, $add_phids);

	$edge_editor = id(new PhabricatorEdgeEditor())
	->setActor($this->getUser());

	foreach ($add_phids as $phid) {
	$edge_editor->addEdge($revision_phid, $edge_type, $phid);
	}

	foreach ($rem_phids as $phid) {
	$edge_editor->removeEdge($revision_phid, $edge_type, $phid);
	}

	$edge_editor->save();
	}

	protected function didSetRevision() {
	$this->maniphestTasks = $this->getManiphestTaskPHIDs();
	$this->oldManiphestTasks = $this->maniphestTasks;
	}

	public function getRequiredHandlePHIDsForCommitMessage() {
	return $this->maniphestTasks;
	}

	public function shouldAppearOnCommitMessageTemplate() {
	return PhabricatorEnv::getEnvConfig('maniphest.enabled');
	}

	public function shouldAppearOnCommitMessage() {
	return PhabricatorEnv::getEnvConfig('maniphest.enabled');
	}

	public function getCommitMessageKey() {
	return 'maniphestTaskPHIDs';
	}

	public function setValueFromParsedCommitMessage($value) {
	$this->maniphestTasks = nonempty($value, array());
	return $this;
	}

	public function renderLabelForCommitMessage() {
	return 'Maniphest Tasks';
	}

	public function getSupportedCommitMessageLabels() {
	return array(
	'Maniphest Task',
	'Maniphest Tasks',
	);
	}

	public function renderValueForCommitMessage($is_edit) {
	if (!$this->maniphestTasks) {
	return null;
	}

	$names = array();
	foreach ($this->maniphestTasks as $phid) {
	$handle = $this->getHandle($phid);
	$names[] = 'T'.$handle->getAlternateID();
	}
	return implode(', ', $names);
	}

	public function parseValueFromCommitMessage($value) {
	$matches = null;
	preg_match_all('/T(\d+)/', $value, $matches);
	if (empty($matches[0])) {
	return array();
	}


	$task_ids = $matches[1];
	$tasks = id(new ManiphestTask())
	->loadAllWhere('id in (%Ld)', $task_ids);

	$task_phids = array();
	$invalid = array();
	foreach ($task_ids as $task_id) {
	$task = idx($tasks, $task_id);
	if (empty($task)) {
	$invalid[] = 'T'.$task_id;
	} else {
	$task_phids[] = $task->getPHID();
	}
	}

	if ($invalid) {
	$what = pht('Maniphest Task(s)', count($invalid));
	$invalid = implode(', ', $invalid);
	throw new DifferentialFieldParseException(
	"Commit message references nonexistent {$what}: {$invalid}.");
	}

	return $task_phids;
	}

	public function renderValueForMail($phase) {
	if ($phase == DifferentialMailPhase::COMMENT) {
	return null;
	}

	if (!$this->maniphestTasks) {
	return null;
	}

	$handles = id(new PhabricatorObjectHandleData($this->maniphestTasks))
	->loadHandles();
	$body = array();
	$body[] = 'MANIPHEST TASKS';
	foreach ($handles as $handle) {
	$body[] = ' '.PhabricatorEnv::getProductionURI($handle->getURI());
	}
	return implode("\n", $body);
	}

	}

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