4 * @file src/Content/Text/Markdown.php
7 namespace Friendica\Content\Text;
9 use Friendica\BaseObject;
10 use Friendica\Model\Contact;
11 use Michelf\MarkdownExtra;
12 use Friendica\Content\Text\HTML;
15 * Friendica-specific usage of Markdown
17 * @author Hypolite Petovan <mrpetovan@gmail.com>
19 class Markdown extends BaseObject
22 * Converts a Markdown string into HTML. The hardwrap parameter maximizes
23 * compatibility with Diaspora in spite of the Markdown standard.
25 * @brief Converts a Markdown string into HTML
27 * @param bool $hardwrap
30 public static function convert($text, $hardwrap = true) {
31 $stamp1 = microtime(true);
33 $MarkdownParser = new MarkdownExtra();
34 $MarkdownParser->hard_wrap = $hardwrap;
35 $html = $MarkdownParser->transform($text);
37 self::getApp()->save_timestamp($stamp1, "parser");
43 * @brief Callback function to replace a Diaspora style mention in a mention for Friendica
45 * @param array $match Matching values for the callback
46 * @return string Replaced mention
48 private static function diasporaMention2BBCodeCallback($match)
50 if ($match[2] == '') {
54 $data = Contact::getDetailsByAddr($match[2]);
59 $name = $data['name'];
62 return '@[url=' . $data['url'] . ']' . $name . '[/url]';
66 * we don't want to support a bbcode specific markdown interpreter
67 * and the markdown library we have is pretty good, but provides HTML output.
68 * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
69 * and then clean up a few Diaspora specific constructs.
71 public static function toBBCode($s)
73 $s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');
75 // Handles single newlines
76 $s = str_replace("\r\n", "\n", $s);
77 $s = str_replace("\n", " \n", $s);
78 $s = str_replace("\r", " \n", $s);
80 // Replace lonely stars in lines not starting with it with literal stars
81 $s = preg_replace('/^([^\*]+)\*([^\*]*)$/im', '$1\*$2', $s);
83 // The parser cannot handle paragraphs correctly
84 $s = str_replace(['</p>', '<p>', '<p dir="ltr">'], ['<br>', '<br>', '<br>'], $s);
86 // Escaping the hash tags
87 $s = preg_replace('/\#([^\s\#])/', '#$1', $s);
89 $s = self::convert($s);
91 $regexp = "/@\{(?:([^\}]+?); )?([^\} ]+)\}/";
92 $s = preg_replace_callback($regexp, ['self', 'diasporaMention2BBCodeCallback'], $s);
94 $s = str_replace('#', '#', $s);
96 $s = HTML::toBBCode($s);
98 // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
99 $s = str_replace('♲', html_entity_decode('♲', ENT_QUOTES, 'UTF-8'), $s);
101 // Convert everything that looks like a link to a link
102 $s = preg_replace('/([^\]=]|^)(https?\:\/\/)([a-zA-Z0-9:\/\-?&;.=_~#%$!+,@]+(?<!,))/ism', '$1[url=$2$3]$2$3[/url]', $s);
104 //$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
105 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism', '[youtube]$2[/youtube]', 'url', $s);
106 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
107 $s = BBCode::pregReplaceInTag('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism' , '[vimeo]$2[/vimeo]' , 'url', $s);
108 $s = BBCode::pregReplaceInTag('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism' , '[vimeo]$1[/vimeo]' , 'url', $s);
110 // remove duplicate adjacent code tags
111 $s = preg_replace('/(\[code\])+(.*?)(\[\/code\])+/ism', '[code]$2[/code]', $s);
113 // Don't show link to full picture (until it is fixed)
114 $s = BBCode::scaleExternalImages($s, false);