<?php
-
/**
- * @file src/Content/Text/Markdown.php
+ * @copyright Copyright (C) 2010-2023, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
*/
namespace Friendica\Content\Text;
-use Friendica\BaseObject;
-use Michelf\MarkdownExtra;
+use Friendica\Core\Logger;
+use Friendica\Core\System;
+use Friendica\DI;
+use Friendica\Model\Contact;
/**
* Friendica-specific usage of Markdown
- *
- * @author Hypolite Petovan <mrpetovan@gmail.com>
*/
-class Markdown extends BaseObject
+class Markdown
{
/**
* Converts a Markdown string into HTML. The hardwrap parameter maximizes
* compatibility with Diaspora in spite of the Markdown standard.
*
- * @brief Converts a Markdown string into HTML
* @param string $text
- * @param bool $hardwrap
+ * @param bool $hardwrap Enables line breaks on \n without two trailing spaces
+ * @param string $baseuri Optional. Prepend anchor links with this URL
* @return string
*/
- public static function convert($text, $hardwrap = true) {
- $stamp1 = microtime(true);
+ public static function convert($text, $hardwrap = true, $baseuri = null) {
+ DI::profiler()->startRecording('rendering');
+
+ $MarkdownParser = new MarkdownParser();
+ $MarkdownParser->code_class_prefix = 'language-';
+ $MarkdownParser->hard_wrap = $hardwrap;
+ $MarkdownParser->hashtag_protection = true;
+ $MarkdownParser->url_filter_func = function ($url) use ($baseuri) {
+ if (!empty($baseuri) && strpos($url, '#') === 0) {
+ $url = ltrim($baseuri, '/') . $url;
+ }
+ return $url;
+ };
+
+ $text = self::convertDiasporaMentionsToHtml($text);
- $MarkdownParser = new MarkdownExtra();
- $MarkdownParser->hard_wrap = $hardwrap;
$html = $MarkdownParser->transform($text);
- self::getApp()->save_timestamp($stamp1, "parser");
+ DI::profiler()->stopRecording();
return $html;
}
+
+ /**
+ * Replace Diaspora-style mentions in a text since they trip the Markdown parser autolinker.
+ *
+ * @param string $text
+ * @return string
+ */
+ private static function convertDiasporaMentionsToHtml(string $text)
+ {
+ return preg_replace_callback(
+ '/([@!]){(?:([^}]+?); ?)?([^} ]+)}/',
+ /*
+ * Matching values for the callback
+ * [1] = mention type (@ or !)
+ * [2] = name (optional)
+ * [3] = profile URL
+ */
+ function ($matches) {
+ if ($matches[3] == '') {
+ return '';
+ }
+
+ $data = Contact::getByURL($matches[3]);
+
+ if (empty($data)) {
+ return '';
+ }
+
+ $name = $matches[2];
+
+ if ($name == '') {
+ $name = $data['name'];
+ }
+
+ return $matches[1] . '<a href="' . $data['url'] . '">' . $name . '</a>';
+ },
+ $text
+ );
+ }
+
+ /*
+ * we don't want to support a bbcode specific markdown interpreter
+ * and the markdown library we have is pretty good, but provides HTML output.
+ * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
+ * and then clean up a few Diaspora specific constructs.
+ */
+ public static function toBBCode($s): string
+ {
+ // @TODO Temporary until we find the source of the null value to finally set the correct type-hint
+ if (is_null($s)) {
+ Logger::warning('Received null value', ['callstack' => System::callstack()]);
+ return '';
+ }
+
+ if (!$s) {
+ return $s;
+ }
+
+ DI::profiler()->startRecording('rendering');
+
+ // The parser cannot handle paragraphs correctly
+ $s = str_replace(['</p>', '<p>', '<p dir="ltr">'], ['<br>', '<br>', '<br>'], $s);
+
+ // Escaping hashtags that could be titles
+ $s = preg_replace('/^\#([^\s\#])/im', '\#$1', $s);
+
+ $s = self::convert($s);
+
+ $s = HTML::toBBCode($s);
+
+ // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
+ $s = str_replace('♲', html_entity_decode('♲', ENT_QUOTES, 'UTF-8'), $s);
+
+ //$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
+ $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
+ $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
+ $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/shorts\/(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
+ $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism' , '[vimeo]$2[/vimeo]' , 'url', $s);
+ $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism' , '[vimeo]$1[/vimeo]' , 'url', $s);
+
+ // remove duplicate adjacent code tags
+ $s = preg_replace('/(\[code\])+(.*?)(\[\/code\])+/ism', '[code]$2[/code]', $s);
+
+ DI::profiler()->stopRecording();
+ return $s;
+ }
}
projects / friendica.git / blobdiff