testing

DifferentialDependsOnFieldSpecification.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.
			*/

			final class DifferentialDependsOnFieldSpecification
			extends DifferentialFieldSpecification {

			public function shouldAppearOnRevisionView() {
			return true;
			}

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

			public function renderLabelForRevisionView() {
			return 'Depends On:';
			}

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

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

			return implode('<br />', $links);
			}

			private function getDependentRevisionPHIDs() {
			return PhabricatorEdgeQuery::loadDestinationPHIDs(
			$this->getRevision()->getPHID(),
			PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV);
			}

			}