DifferentialReviewersHeraldAction.php
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	<?php

	abstract class DifferentialReviewersHeraldAction
	extends HeraldAction {

	const DO_AUTHORS = 'do.authors';
	const DO_ADD_REVIEWERS = 'do.add-reviewers';
	const DO_ADD_BLOCKING_REVIEWERS = 'do.add-blocking-reviewers';

	public function getActionGroupKey() {
	return HeraldApplicationActionGroup::ACTIONGROUPKEY;
	}

	public function supportsObject($object) {
	return ($object instanceof DifferentialRevision);
	}

	protected function applyReviewers(array $phids, $is_blocking) {
	$adapter = $this->getAdapter();
	$object = $adapter->getObject();

	$phids = array_fuse($phids);

	// Don't try to add revision authors as reviewers.
	$authors = array();
	foreach ($phids as $phid) {
	if ($phid == $object->getAuthorPHID()) {
	$authors[] = $phid;
	unset($phids[$phid]);
	}
	}

	if ($authors) {
	$this->logEffect(self::DO_AUTHORS, $authors);
	if (!$phids) {
	return;
	}
	}

	$reviewers = $object->getReviewers();

	if ($is_blocking) {
	$new_status = DifferentialReviewerStatus::STATUS_BLOCKING;
	} else {
	$new_status = DifferentialReviewerStatus::STATUS_ADDED;
	}

	$new_strength = DifferentialReviewerStatus::getStatusStrength(
	$new_status);

	$current = array();
	foreach ($phids as $phid) {
	if (!isset($reviewers[$phid])) {
	continue;
	}

	// If we're applying a stronger status (usually, upgrading a reviewer
	// into a blocking reviewer), skip this check so we apply the change.
	$old_strength = DifferentialReviewerStatus::getStatusStrength(
	$reviewers[$phid]->getReviewerStatus());
	if ($old_strength <= $new_strength) {
	continue;
	}

	$current[] = $phid;
	}

	$allowed_types = array(
	PhabricatorPeopleUserPHIDType::TYPECONST,
	PhabricatorProjectProjectPHIDType::TYPECONST,
	PhabricatorOwnersPackagePHIDType::TYPECONST,
	);

	$targets = $this->loadStandardTargets($phids, $allowed_types, $current);
	if (!$targets) {
	return;
	}

	$phids = array_fuse(array_keys($targets));

	$value = array();
	foreach ($phids as $phid) {
	if ($is_blocking) {
	$value[] = 'blocking('.$phid.')';
	} else {
	$value[] = $phid;
	}
	}

	$reviewers_type = DifferentialRevisionReviewersTransaction::TRANSACTIONTYPE;

	$xaction = $adapter->newTransaction()
	->setTransactionType($reviewers_type)
	->setNewValue(
	array(
	'+' => $value,
	));

	$adapter->queueTransaction($xaction);

	if ($is_blocking) {
	$this->logEffect(self::DO_ADD_BLOCKING_REVIEWERS, $phids);
	} else {
	$this->logEffect(self::DO_ADD_REVIEWERS, $phids);
	}
	}

	protected function getActionEffectMap() {
	return array(
	self::DO_AUTHORS => array(
	'icon' => 'fa-user',
	'color' => 'grey',
	'name' => pht('Revision Author'),
	),
	self::DO_ADD_REVIEWERS => array(
	'icon' => 'fa-user',
	'color' => 'green',
	'name' => pht('Added Reviewers'),
	),
	self::DO_ADD_BLOCKING_REVIEWERS => array(
	'icon' => 'fa-user',
	'color' => 'green',
	'name' => pht('Added Blocking Reviewers'),
	),
	);
	}

	protected function renderActionEffectDescription($type, $data) {
	switch ($type) {
	case self::DO_AUTHORS:
	return pht(
	'Declined to add revision author as reviewer: %s.',
	$this->renderHandleList($data));
	case self::DO_ADD_REVIEWERS:
	return pht(
	'Added %s reviewer(s): %s.',
	phutil_count($data),
	$this->renderHandleList($data));
	case self::DO_ADD_BLOCKING_REVIEWERS:
	return pht(
	'Added %s blocking reviewer(s): %s.',
	phutil_count($data),
	$this->renderHandleList($data));
	}
	}


	}

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