DifferentialDependsOnFieldSpecification.php
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	<?php

	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 array_interleave(phutil_tag('br'), $links);
	}

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

	}