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DiffusionSourceHyperlinkEngineExtension.php
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			<?php

			final class DiffusionSourceHyperlinkEngineExtension
			extends PhabricatorRemarkupHyperlinkEngineExtension {

			const LINKENGINEKEY = 'diffusion-src';

			public function processHyperlinks(array $hyperlinks) {
			$engine = $this->getEngine();
			$viewer = $engine->getConfig('viewer');

			if (!$viewer) {
			return;
			}

			$hyperlinks = $this->getSelfLinks($hyperlinks);

			$links = array();
			foreach ($hyperlinks as $link) {
			$uri = $link->getURI();
			$uri = new PhutilURI($uri);

			$path = $uri->getPath();

			$pattern =
			'(^'.
			'/(?:diffusion\|source)'.
			'/(?P<identifier>[^/]+)'.
			'/browse'.
			'/(?P<blob>.*)'.
			'\z)';
			$matches = null;
			if (!preg_match($pattern, $path, $matches)) {
			continue;
			}

			$links[] = array(
			'ref' => $link,
			'identifier' => $matches['identifier'],
			'blob' => $matches['blob'],
			);
			}

			if (!$links) {
			return;
			}

			$identifiers = ipull($links, 'identifier');

			$query = id(new PhabricatorRepositoryQuery())
			->setViewer($viewer)
			->withIdentifiers($identifiers);

			$query->execute();

			$repository_map = $query->getIdentifierMap();

			foreach ($links as $link) {
			$identifier = $link['identifier'];

			$repository = idx($repository_map, $identifier);
			if (!$repository) {
			continue;
			}

			$ref = $link['ref'];
			$uri = $ref->getURI();


			$tag = id(new DiffusionSourceLinkView())
			->setViewer($viewer)
			->setRepository($repository)
			->setURI($uri)
			->setBlob($link['blob']);

			if (!$ref->isEmbed()) {
			$tag->setText($uri);
			}

			$ref->setResult($tag);
			}
			}

			}