PhabricatorEditEngineQuery.php
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	<?php

	final class PhabricatorEditEngineQuery
	extends PhabricatorCursorPagedPolicyAwareQuery {

	private $engineKeys;

	public function withEngineKeys(array $keys) {
	$this->engineKeys = $keys;
	return $this;
	}

	protected function loadPage() {
	$engines = PhabricatorEditEngine::getAllEditEngines();

	if ($this->engineKeys !== null) {
	$engines = array_select_keys($engines, $this->engineKeys);
	}

	return $engines;
	}

	protected function willFilterPage(array $engines) {
	$viewer = $this->getViewer();

	foreach ($engines as $key => $engine) {
	$app_class = $engine->getEngineApplicationClass();
	if ($app_class === null) {
	continue;
	}

	$can_see = PhabricatorApplication::isClassInstalledForViewer(
	$app_class,
	$viewer);
	if (!$can_see) {
	$this->didRejectResult($engine);
	unset($engines[$key]);
	continue;
	}
	}

	return $engines;
	}

	public function getQueryApplicationClass() {
	return 'PhabricatorTransactionsApplication';
	}

	protected function getResultCursor($object) {
	return null;
	}

	}