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   $ret="<span class='oembed'>";
  20   switch ($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          $ret = "<a href='".$embedurl."' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' >";
  26          $ret.= "<img width='$tw' height='$th' src='".$j->thumbnail_url."'>";
  27          $ret.= "</a>";
  28        } else {
  29          $ret=$j->html;
  30        }
  31        $ret.="<br>";
  32     }; break;
  33     case "photo": {
  34       $ret = "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  35       $ret.="<br>";
  36     }; break;
  37     case "link": {
  38       //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  39     }; break;
  40     case "rich": {
  41       // not so safe..
  42       $ret = "<blockquote>".$j->html."</blockquote>";
  43     }; break;
  44   }
  45
  46   $embedlink = (isset($j->title))?$j->title:$embedurl;
  47   $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
  48   if (isset($j->author_name)) $ret.=" by ".$j->author_name;
  49   if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
  50   $ret.="</span>";
  51   return $ret;
  52 }
  53
  54 function oembed_bbcode2html($text){
  55         $stopoembed = get_config("system","no_oembed");
  56         if ($stopoembed == true){
  57                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
  58         }
  59         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", oembed_replacecb ,$text);
  60 }
  61
  62
  63 function oe_build_xpath($attr, $value){
  64         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
  65         return "contains( normalize-space( @$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'";
  66 }
  67
  68 function oe_get_inner_html( $node ) {
  69     $innerHTML= '';
  70     $children = $node->childNodes;
  71     foreach ($children as $child) {
  72         $innerHTML .= $child->ownerDocument->saveXML( $child );
  73     }
  74     return $innerHTML;
  75 }
  76
  77 /**
  78  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
  79  * and replace it with [embed]url[/embed]
  80  */
  81 function oembed_html2bbcode($text) {
  82         $dom = DOMDocument::loadHTML($text);
  83         $xpath = new DOMXPath($dom);
  84         $attr = "oembed";
  85
  86         $xattr = oe_build_xpath("class","oembed");
  87         $entries = $xpath->query("//span[$xattr]");
  88
  89         $xattr = oe_build_xpath("rel","oembed");
  90         foreach($entries as $e) {
  91                 $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
  92                 if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[embed]"), $e);
  93         }
  94         return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
  95 }
  96
  97 ?>