4 * @file src/Content/Text/Markdown.php
7 namespace Friendica\Content\Text;
9 use Friendica\Core\System;
11 use Friendica\Model\Contact;
14 * Friendica-specific usage of Markdown
16 * @author Hypolite Petovan <hypolite@mrpetovan.com>
21 * Converts a Markdown string into HTML. The hardwrap parameter maximizes
22 * compatibility with Diaspora in spite of the Markdown standard.
25 * @param bool $hardwrap
29 public static function convert($text, $hardwrap = true) {
30 $stamp1 = microtime(true);
32 $MarkdownParser = new MarkdownParser();
33 $MarkdownParser->code_class_prefix = 'language-';
34 $MarkdownParser->hard_wrap = $hardwrap;
35 $MarkdownParser->hashtag_protection = true;
36 $MarkdownParser->url_filter_func = function ($url) {
37 if (strpos($url, '#') === 0) {
38 $url = ltrim($_SERVER['REQUEST_URI'], '/') . $url;
43 $html = $MarkdownParser->transform($text);
45 DI::profiler()->saveTimestamp($stamp1, "parser", System::callstack());
51 * Callback function to replace a Diaspora style mention in a mention for Friendica
53 * @param array $match Matching values for the callback
54 * [1] = mention type (@ or !)
55 * [2] = name (optional)
57 * @return string Replaced mention
58 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
59 * @throws \ImagickException
61 private static function diasporaMention2BBCodeCallback($match)
63 if ($match[3] == '') {
67 $data = Contact::getDetailsByAddr($match[3]);
76 $name = $data['name'];
79 return $match[1] . '[url=' . $data['url'] . ']' . $name . '[/url]';
83 * we don't want to support a bbcode specific markdown interpreter
84 * and the markdown library we have is pretty good, but provides HTML output.
85 * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
86 * and then clean up a few Diaspora specific constructs.
88 public static function toBBCode($s)
90 $s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');
92 // The parser cannot handle paragraphs correctly
93 $s = str_replace(['</p>', '<p>', '<p dir="ltr">'], ['<br>', '<br>', '<br>'], $s);
95 // Escaping hashtags that could be titles
96 $s = preg_replace('/^\#([^\s\#])/im', '\#$1', $s);
98 $s = self::convert($s);
100 $regexp = "/([@!])\{(?:([^\}]+?); ?)?([^\} ]+)\}/";
101 $s = preg_replace_callback($regexp, ['self', 'diasporaMention2BBCodeCallback'], $s);
103 $s = HTML::toBBCode($s);
105 // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
106 $s = str_replace('♲', html_entity_decode('♲', ENT_QUOTES, 'UTF-8'), $s);
108 // Convert everything that looks like a link to a link
109 $s = preg_replace('/([^\]=]|^)(https?\:\/\/)([a-zA-Z0-9:\/\-?&;.=_~#%$!+,@]+(?<!,))/ism', '$1[url=$2$3]$2$3[/url]', $s);
111 //$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
112 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
113 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
114 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism' , '[vimeo]$2[/vimeo]' , 'url', $s);
115 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism' , '[vimeo]$1[/vimeo]' , 'url', $s);
117 // remove duplicate adjacent code tags
118 $s = preg_replace('/(\[code\])+(.*?)(\[\/code\])+/ism', '[code]$2[/code]', $s);
120 // Don't show link to full picture (until it is fixed)
121 $s = BBCode::scaleExternalImages($s);