DifferentialLandingActionMenuEventListener.php
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DifferentialLandingActionMenuEventListener.php
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	<?php

	/**
	* This class adds a "Land this" button to revision view.
	*/
	final class DifferentialLandingActionMenuEventListener
	extends PhabricatorEventListener {

	public function register() {
	$this->listen(PhabricatorEventType::TYPE_UI_DIDRENDERACTIONS);
	}

	public function handleEvent(PhutilEvent $event) {
	switch ($event->getType()) {
	case PhabricatorEventType::TYPE_UI_DIDRENDERACTIONS:
	$this->handleActionsEvent($event);
	break;
	}
	}

	private function handleActionsEvent(PhutilEvent $event) {
	$object = $event->getValue('object');
	if ($object instanceof DifferentialRevision) {
	$this->renderRevisionAction($event);
	}
	}

	private function renderRevisionAction(PhutilEvent $event) {
	if (!$this->canUseApplication($event->getUser())) {
	return null;
	}

	$revision = $event->getValue('object');

	$repository = $revision->getRepository();
	if ($repository === null) {
	return null;
	}

	$strategies = id(new PhutilSymbolLoader())
	->setAncestorClass('DifferentialLandingStrategy')
	->loadObjects();
	foreach ($strategies as $strategy) {
	$viewer = $event->getUser();
	$action = $strategy->createMenuItem($viewer, $revision, $repository);
	if ($action == null) {
	continue;
	}
	if ($strategy->isActionDisabled($viewer, $revision, $repository)) {
	$action->setDisabled(true);
	}
	$this->addActionMenuItems($event, $action);
	}
	}

	}