PhutilRemarkupRuleDocumentLink.php
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PhutilRemarkupRuleDocumentLink.php
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			<?php

			/**
			* @group markup
			*/
			final class PhutilRemarkupRuleDocumentLink
			extends PhutilRemarkupRule {

			public function apply($text) {

			$text = preg_replace_callback(
			'@\B\\[\\[([^\|\\]]+)(?:\\\|([^\\]]+))?\\]\\]\B@U',
			array($this, 'markupDocumentLink'),
			$text);

			return $text;
			}

			protected function renderHyperlink($link, $name) {
			return phutil_render_tag(
			'a',
			array(
			'href' => $link,
			'target' => '_blank',
			),
			phutil_escape_html($name));
			}

			public function markupDocumentLink($matches) {
			$uri = trim($matches[1]);
			$name = trim(idx($matches, 2, $uri));

			// If whatever is being linked to begins with "/" or has "://", treat it
			// as a URI instead of a wiki page.
			$is_uri = preg_match('@(^/)\|(://)@', $uri);

			if ($is_uri && strncmp('/', $uri, 1)) {
			$protocols = $this->getEngine()->getConfig(
			'uri.allowed-protocols',
			array());
			$protocol = id(new PhutilURI($uri))->getProtocol();
			if (!idx($protocols, $protocol)) {
			// Don't treat this as a URI if it's not an allowed protocol.
			$is_uri = false;
			}
			}

			if (!$is_uri) {
			return $matches[0];
			}

			return $this->getEngine()->storeText($this->renderHyperlink($uri, $name));
			}

			}