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DifferentialChangesetListController.php
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			<?php

			final class DifferentialChangesetListController
			extends DifferentialController {

			private $diff;

			public function shouldAllowPublic() {
			return true;
			}

			public function handleRequest(AphrontRequest $request) {
			$viewer = $this->getViewer();

			$diff = id(new DifferentialDiffQuery())
			->setViewer($viewer)
			->withIDs(array($request->getURIData('id')))
			->executeOne();
			if (!$diff) {
			return new Aphront404Response();
			}
			$this->diff = $diff;

			return id(new DifferentialChangesetSearchEngine())
			->setController($this)
			->setDiff($diff)
			->buildResponse();
			}

			protected function buildApplicationCrumbs() {
			$crumbs = parent::buildApplicationCrumbs();

			$diff = $this->diff;
			if ($diff) {
			$revision = $diff->getRevision();
			if ($revision) {
			$crumbs->addTextCrumb(
			$revision->getMonogram(),
			$revision->getURI());
			}

			$crumbs->addTextCrumb(
			pht('Diff %d', $diff->getID()),
			$diff->getURI());
			}

			return $crumbs;
			}


			}