Merge pull request #6697 from annando/memory-jsonld

[friendica.git] / src / Content / Text / Markdown.php

diff --git a/src/Content/Text/Markdown.php b/src/Content/Text/Markdown.php
index 1d2f68bc7c4ef2bbc0c930c4c15acdaa01bdcd0d..e3e2cd3ac957750e56f04205179611a3038aac72 100644 (file)
--- a/src/Content/Text/Markdown.php
+++ b/src/Content/Text/Markdown.php
@@ -7,12 +7,14 @@
 namespace Friendica\Content\Text;
 
 use Friendica\BaseObject;
+use Friendica\Core\System;
+use Friendica\Model\Contact;
 use Michelf\MarkdownExtra;
 
 /**
  * Friendica-specific usage of Markdown
  *
- * @author Hypolite Petovan <mrpetovan@gmail.com>
+ * @author Hypolite Petovan <hypolite@mrpetovan.com>
  */
 class Markdown extends BaseObject
 {
@@ -24,16 +26,95 @@ class Markdown extends BaseObject
         * @param string $text
         * @param bool   $hardwrap
         * @return string
+        * @throws \Exception
         */
        public static function convert($text, $hardwrap = true) {
                $stamp1 = microtime(true);
 
                $MarkdownParser = new MarkdownExtra();
                $MarkdownParser->hard_wrap = $hardwrap;
+               $MarkdownParser->code_class_prefix = 'language-';
                $html = $MarkdownParser->transform($text);
+               $html = preg_replace('/<a(.*?)href="#/is', '<a$1href="' . ltrim($_SERVER['REQUEST_URI'], '/') . '#', $html);
 
-               self::getApp()->save_timestamp($stamp1, "parser");
+               self::getApp()->getProfiler()->saveTimestamp($stamp1, "parser", System::callstack());
 
                return $html;
        }
+
+       /**
+        * @brief Callback function to replace a Diaspora style mention in a mention for Friendica
+        *
+        * @param array $match Matching values for the callback
+        *                     [1] = mention type (@ or !)
+        *                     [2] = name (optional)
+        *                     [3] = address
+        * @return string Replaced mention
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        */
+       private static function diasporaMention2BBCodeCallback($match)
+       {
+               if ($match[3] == '') {
+                       return;
+               }
+
+               $data = Contact::getDetailsByAddr($match[3]);
+
+               if (empty($data)) {
+                       return;
+               }
+
+               $name = $match[2];
+
+               if ($name == '') {
+                       $name = $data['name'];
+               }
+
+               return $match[1] . '[url=' . $data['url'] . ']' . $name . '[/url]';
+       }
+
+       /*
+        * we don't want to support a bbcode specific markdown interpreter
+        * and the markdown library we have is pretty good, but provides HTML output.
+        * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
+        * and then clean up a few Diaspora specific constructs.
+        */
+       public static function toBBCode($s)
+       {
+               $s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');
+
+               // 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);
+
+               $regexp = "/([@!])\{(?:([^\}]+?); ?)?([^\} ]+)\}/";
+               $s = preg_replace_callback($regexp, ['self', 'diasporaMention2BBCodeCallback'], $s);
+
+               $s = HTML::toBBCode($s);
+
+               // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
+               $s = str_replace('&#x2672;', html_entity_decode('&#x2672;', ENT_QUOTES, 'UTF-8'), $s);
+
+               // Convert everything that looks like a link to a link
+               $s = preg_replace('/([^\]=]|^)(https?\:\/\/)([a-zA-Z0-9:\/\-?&;.=_~#%$!+,@]+(?<!,))/ism', '$1[url=$2$3]$2$3[/url]', $s);
+
+               //$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?:\/\/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);
+
+               // Don't show link to full picture (until it is fixed)
+               $s = BBCode::scaleExternalImages($s, false);
+
+               return $s;
+       }
 }