include/oembed.php

   1 <?php
   2 function oembed_replacecb($matches){
   3   $embedurl=$matches[1];
   4
   5   $r = q("SELECT v FROM `cache` WHERE k='%s'",
   6                 dbesc($embedurl));
   7   if(count($r)){
   8         $txt = $r[0]['v'];
   9   } else {
  10           $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);
  11           $txt = fetch_url($ourl);
  12           //save in cache
  13           q("INSERT INTO `cache` VALUES ('%s','%s','%s')",
  14                 dbesc($embedurl),
  15                 dbesc($txt),
  16                 dbesc(datetime_convert()));
  17   }
  18   $j = json_decode($txt);
  19   $ret="<span class='oembed ".$j->type."'>";
  20   switch ($j->type) {
  21     case "video": {
  22        if (isset($j->thumbnail_url)) {
  23          /*$tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
  24          $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;*/
  25                 $tw=150; $th=120;
  26          $ret = "<a href='".$embedurl."' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' style='float:left; margin: 1em; '>";
  27          $ret.= "<img width='$tw' height='$th' src='".$j->thumbnail_url."'>";
  28          $ret.= "</a>";
  29        } else {
  30          $ret=$j->html;
  31        }
  32        $ret.="<br>";
  33     }; break;
  34     case "photo": {
  35       $ret = "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  36       $ret.="<br>";
  37     }; break;
  38     case "link": {
  39       //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  40     }; break;
  41     case "rich": {
  42       // not so safe..
  43       $ret = "<blockquote>".$j->html."</blockquote>";
  44     }; break;
  45   }
  46
  47   $embedlink = (isset($j->title))?$j->title:$embedurl;
  48   $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
  49   if (isset($j->author_name)) $ret.=" by ".$j->author_name;
  50   if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
  51   $ret.="<br style='clear:left'></span>";
  52   return $ret;
  53 }
  54
  55 function oembed_bbcode2html($text){
  56         $stopoembed = get_config("system","no_oembed");
  57         if ($stopoembed == true){
  58                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
  59         }
  60         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
  61 }
  62
  63
  64 function oe_build_xpath($attr, $value){
  65         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
  66         return "contains( normalize-space( @$attr ), ' $value ' ) or substring( normalize-space( @$attr ), 1, string-length( '$value' ) + 1 ) = '$value ' or substring( normalize-space( @$attr ), string-length( @$attr ) - string-length( '$value' ) ) = ' $value' or @$attr = '$value'";
  67 }
  68
  69 function oe_get_inner_html( $node ) {
  70     $innerHTML= '';
  71     $children = $node->childNodes;
  72     foreach ($children as $child) {
  73         $innerHTML .= $child->ownerDocument->saveXML( $child );
  74     }
  75     return $innerHTML;
  76 }
  77
  78 /**
  79  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
  80  * and replace it with [embed]url[/embed]
  81  */
  82 function oembed_html2bbcode($text) {
  83         // start parser only if 'oembed' is in text
  84         if (strpos($text, "oembed")){
  85
  86                 // convert non ascii chars to html entities
  87                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
  88
  89                 // If it doesn't parse at all, just return the text.
  90                 $dom = @DOMDocument::loadHTML($html_text);
  91                 if(! $dom)
  92                         return $text;
  93                 $xpath = new DOMXPath($dom);
  94                 $attr = "oembed";
  95
  96                 $xattr = oe_build_xpath("class","oembed");
  97                 $entries = $xpath->query("//span[$xattr]");
  98
  99                 $xattr = oe_build_xpath("rel","oembed");
 100                 foreach($entries as $e) {
 101                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 102                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 103                 }
 104                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 105         } else {
 106                 return $text;
 107         }
 108 }
 109
 110 ?>