include/oembed.php

   1 <?php
   2 function oembed_replacecb($matches){
   3         $embedurl=$matches[1];
   4         $j = oembed_fetch_url($embedurl);
   5         return oembed_format_object($j);
   6 }
   7
   8
   9 function oembed_fetch_url($embedurl){
  10         $r = q("SELECT v FROM `cache` WHERE k='%s'",
  11                                 dbesc($embedurl));
  12
  13         if(count($r)){
  14                 $txt = $r[0]['v'];
  15         } else {
  16                 $txt = "";
  17
  18                 // try oembed autodiscovery
  19                 $html_text = fetch_url($embedurl);
  20                 $dom = @DOMDocument::loadHTML($html_text);
  21                 if ($dom){
  22                         $xpath = new DOMXPath($dom);
  23                         $attr = "oembed";
  24
  25                         $xattr = oe_build_xpath("class","oembed");
  26                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  27                         foreach($entries as $e){
  28                                 $href = $e->getAttributeNode("href")->nodeValue;
  29                                 $txt = fetch_url($href);
  30                         }
  31                 }
  32
  33                 if ($txt==false || $txt==""){
  34                         // try oohembed service
  35                         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);
  36                         $txt = fetch_url($ourl);
  37                 }
  38
  39                 $txt=trim($txt);
  40                 if ($txt[0]!="{") $txt='{"type":"error"}';
  41
  42                 //save in cache
  43                 /*q("INSERT INTO `cache` VALUES ('%s','%s','%s')",
  44                         dbesc($embedurl),
  45                         dbesc($txt),
  46                         dbesc(datetime_convert()));*/
  47         }
  48
  49         $j = json_decode($txt);
  50         $j->embedurl = $embedurl;
  51         return $j;
  52 }
  53
  54 function oembed_format_object($j){
  55         $embedurl = $j->embedurl;
  56         $ret="<span class='oembed ".$j->type."'>";
  57         switch ($j->type) {
  58                 case "video": {
  59                         if (isset($j->thumbnail_url)) {
  60                                 /*$tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
  61                                 $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;*/
  62                                 $tw=150; $th=120;
  63                                 $ret.= "<a href='".$embedurl."' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' style='float:left; margin: 1em; '>";
  64                                 $ret.= "<img width='$tw' height='$th' src='".$j->thumbnail_url."'>";
  65                                 $ret.= "</a>";
  66                         } else {
  67                                 $ret=$j->html;
  68                         }
  69                         $ret.="<br>";
  70                 }; break;
  71                 case "photo": {
  72                         $ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  73                         $ret.="<br>";
  74                 }; break;
  75                 case "link": {
  76                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  77                 }; break;
  78                 case "rich": {
  79                         // not so safe..
  80                         $ret.= "<blockquote>".$j->html."</blockquote>";
  81                 }; break;
  82         }
  83
  84         $embedlink = (isset($j->title))?$j->title:$embedurl;
  85         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
  86         if (isset($j->author_name)) $ret.=" by ".$j->author_name;
  87         if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
  88         $ret.="<br style='clear:left'></span>";
  89         return $ret;
  90 }
  91
  92 function oembed_bbcode2html($text){
  93         $stopoembed = get_config("system","no_oembed");
  94         if ($stopoembed == true){
  95                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
  96         }
  97         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
  98 }
  99
 100
 101 function oe_build_xpath($attr, $value){
 102         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 103         return "contains( normalize-space( @$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'";
 104 }
 105
 106 function oe_get_inner_html( $node ) {
 107     $innerHTML= '';
 108     $children = $node->childNodes;
 109     foreach ($children as $child) {
 110         $innerHTML .= $child->ownerDocument->saveXML( $child );
 111     }
 112     return $innerHTML;
 113 }
 114
 115 /**
 116  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 117  * and replace it with [embed]url[/embed]
 118  */
 119 function oembed_html2bbcode($text) {
 120         // start parser only if 'oembed' is in text
 121         if (strpos($text, "oembed")){
 122
 123                 // convert non ascii chars to html entities
 124                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 125
 126                 // If it doesn't parse at all, just return the text.
 127                 $dom = @DOMDocument::loadHTML($html_text);
 128                 if(! $dom)
 129                         return $text;
 130                 $xpath = new DOMXPath($dom);
 131                 $attr = "oembed";
 132
 133                 $xattr = oe_build_xpath("class","oembed");
 134                 $entries = $xpath->query("//span[$xattr]");
 135
 136                 $xattr = oe_build_xpath("rel","oembed");
 137                 foreach($entries as $e) {
 138                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 139                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 140                 }
 141                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 142         } else {
 143                 return $text;
 144         }
 145 }
 146
 147 ?>