PhabricatorPhurlLinkRemarkupRule.php
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	<?php

	final class PhabricatorPhurlLinkRemarkupRule extends PhutilRemarkupRule {

	public function getPriority() {
	return 200.0;
	}

	public function apply($text) {
	// `((U123))` remarkup link to `/u/123`
	// `((alias))` remarkup link to `/u/alias`
	return preg_replace_callback(
	'/$\(([^ )]+)$\)/',
	array($this, 'markupLink'),
	$text);
	}

	public function markupLink(array $matches) {
	$engine = $this->getEngine();
	$viewer = $engine->getConfig('viewer');
	$text_mode = $engine->isTextMode();

	if (!$this->isFlatText($matches[0])) {
	return $matches[0];
	}

	$ref = $matches[1];

	if (ctype_digit($ref)) {
	$phurls = id(new PhabricatorPhurlURLQuery())
	->setViewer($viewer)
	->withIDs(array($ref))
	->execute();
	} else {
	$phurls = id(new PhabricatorPhurlURLQuery())
	->setViewer($viewer)
	->withAliases(array($ref))
	->execute();
	}

	$phurl = head($phurls);

	if ($phurl) {
	if ($text_mode) {
	return $phurl->getName().' <'.$phurl->getLongURL().'>';
	}

	$link = phutil_tag(
	'a',
	array(
	'href' => $phurl->getLongURL(),
	'target' => '_blank',
	),
	$phurl->getName());

	return $this->getEngine()->storeText($link);
	} else {
	return $matches[0];
	}
	}


	}