3 * @copyright Copyright (C) 2020, Friendica
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Content\Text;
24 use Friendica\Core\System;
26 use Friendica\Model\Contact;
29 * Friendica-specific usage of Markdown
34 * Converts a Markdown string into HTML. The hardwrap parameter maximizes
35 * compatibility with Diaspora in spite of the Markdown standard.
38 * @param bool $hardwrap
42 public static function convert($text, $hardwrap = true) {
43 $stamp1 = microtime(true);
45 $MarkdownParser = new MarkdownParser();
46 $MarkdownParser->code_class_prefix = 'language-';
47 $MarkdownParser->hard_wrap = $hardwrap;
48 $MarkdownParser->hashtag_protection = true;
49 $MarkdownParser->url_filter_func = function ($url) {
50 if (strpos($url, '#') === 0) {
51 $url = ltrim($_SERVER['REQUEST_URI'], '/') . $url;
56 $html = $MarkdownParser->transform($text);
58 DI::profiler()->saveTimestamp($stamp1, "parser", System::callstack());
64 * Callback function to replace a Diaspora style mention in a mention for Friendica
66 * @param array $match Matching values for the callback
67 * [1] = mention type (@ or !)
68 * [2] = name (optional)
70 * @return string Replaced mention
71 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
72 * @throws \ImagickException
74 private static function diasporaMention2BBCodeCallback($match)
76 if ($match[3] == '') {
80 $data = Contact::getDetailsByAddr($match[3]);
89 $name = $data['name'];
92 return $match[1] . '[url=' . $data['url'] . ']' . $name . '[/url]';
96 * we don't want to support a bbcode specific markdown interpreter
97 * and the markdown library we have is pretty good, but provides HTML output.
98 * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
99 * and then clean up a few Diaspora specific constructs.
101 public static function toBBCode($s)
103 $s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');
105 // The parser cannot handle paragraphs correctly
106 $s = str_replace(['</p>', '<p>', '<p dir="ltr">'], ['<br>', '<br>', '<br>'], $s);
108 // Escaping hashtags that could be titles
109 $s = preg_replace('/^\#([^\s\#])/im', '\#$1', $s);
111 $s = self::convert($s);
113 $regexp = "/([@!])\{(?:([^\}]+?); ?)?([^\} ]+)\}/";
114 $s = preg_replace_callback($regexp, ['self', 'diasporaMention2BBCodeCallback'], $s);
116 $s = HTML::toBBCode($s);
118 // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
119 $s = str_replace('♲', html_entity_decode('♲', ENT_QUOTES, 'UTF-8'), $s);
121 // Convert everything that looks like a link to a link
122 $s = preg_replace('/([^\]=]|^)(https?\:\/\/)([a-zA-Z0-9:\/\-?&;.=_~#%$!+,@]+(?<!,))/ism', '$1[url=$2$3]$2$3[/url]', $s);
124 //$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
125 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
126 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
127 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism' , '[vimeo]$2[/vimeo]' , 'url', $s);
128 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism' , '[vimeo]$1[/vimeo]' , 'url', $s);
130 // remove duplicate adjacent code tags
131 $s = preg_replace('/(\[code\])+(.*?)(\[\/code\])+/ism', '[code]$2[/code]', $s);
133 // Don't show link to full picture (until it is fixed)
134 $s = BBCode::scaleExternalImages($s);