PhabricatorYoutubeRemarkupRule.php
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PhabricatorYoutubeRemarkupRule.php
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	<?php

	final class PhabricatorYoutubeRemarkupRule extends PhutilRemarkupRule {

	public function getPriority() {
	return 350.0;
	}

	public function apply($text) {
	try {
	$uri = new PhutilURI($text);
	} catch (Exception $ex) {
	return $text;
	}

	$domain = $uri->getDomain();
	if (!preg_match('/(^\|\.)youtube\.com\z/', $domain)) {
	return $text;
	}

	$v_params = array();

	$params = $uri->getQueryParamsAsPairList();
	foreach ($params as $pair) {
	list($k, $v) = $pair;
	if ($k === 'v') {
	$v_params[] = $v;
	}
	}

	if (count($v_params) !== 1) {
	return $text;
	}

	$v_param = head($v_params);

	$text_mode = $this->getEngine()->isTextMode();
	$mail_mode = $this->getEngine()->isHTMLMailMode();

	if ($text_mode \|\| $mail_mode) {
	return $text;
	}

	$youtube_src = 'https://www.youtube.com/embed/'.$v_param;

	$iframe = $this->newTag(
	'div',
	array(
	'class' => 'embedded-youtube-video',
	),
	$this->newTag(
	'iframe',
	array(
	'width' => '650',
	'height' => '400',
	'style' => 'margin: 1em auto; border: 0px;',
	'src' => $youtube_src,
	'frameborder' => 0,
	),
	''));

	return $this->getEngine()->storeText($iframe);
	}

	public function didMarkupText() {
	CelerityAPI::getStaticResourceResponse()
	->addContentSecurityPolicyURI('frame-src', 'https://www.youtube.com/');
	}

	}