testing

PhabricatorFactLastUpdatedEngine.php
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			<?php

			/*
			* Copyright 2012 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			/**
			* Engine that records the time facts were last updated.
			*/
			final class PhabricatorFactLastUpdatedEngine extends PhabricatorFactEngine {

			public function getFactSpecs(array $fact_types) {
			$results = array();
			foreach ($fact_types as $type) {
			if ($type == 'updated') {
			$results[] = id(new PhabricatorFactSimpleSpec($type))
			->setName('Facts Last Updated')
			->setUnit(PhabricatorFactSimpleSpec::UNIT_EPOCH);
			}
			}
			return $results;
			}

			public function shouldComputeAggregateFacts() {
			return true;
			}

			public function computeAggregateFacts() {
			$facts = array();

			$facts[] = id(new PhabricatorFactAggregate())
			->setFactType('updated')
			->setValueX(time());

			return $facts;
			}

			}