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 return;
  11         $r = q("SELECT v FROM `cache` WHERE k='%s'",
  12                                 dbesc($embedurl));
  13
  14         if(count($r)){
  15                 $txt = $r[0]['v'];
  16         } else {
  17                 $txt = "";
  18
  19                 // try oembed autodiscovery
  20                 $html_text = fetch_url($embedurl);
  21                 if(! $html_text)
  22                         return;
  23                 $dom = @DOMDocument::loadHTML($html_text);
  24                 if ($dom){
  25                         $xpath = new DOMXPath($dom);
  26                         $attr = "oembed";
  27
  28                         $xattr = oe_build_xpath("class","oembed");
  29                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  30                         foreach($entries as $e){
  31                                 $href = $e->getAttributeNode("href")->nodeValue;
  32                                 $txt = fetch_url($href);
  33                         }
  34                 }
  35
  36                 if ($txt==false || $txt==""){
  37                         // try oohembed service
  38                         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);
  39                         $txt = fetch_url($ourl);
  40                 }
  41
  42                 $txt=trim($txt);
  43                 if ($txt[0]!="{") $txt='{"type":"error"}';
  44
  45                 //save in cache
  46                 /*q("INSERT INTO `cache` VALUES ('%s','%s','%s')",
  47                         dbesc($embedurl),
  48                         dbesc($txt),
  49                         dbesc(datetime_convert()));*/
  50         }
  51
  52         $j = json_decode($txt);
  53         $j->embedurl = $embedurl;
  54         return $j;
  55 }
  56
  57 function oembed_format_object($j){
  58         $embedurl = $j->embedurl;
  59         $ret="<span class='oembed ".$j->type."'>";
  60         switch ($j->type) {
  61                 case "video": {
  62                         if (isset($j->thumbnail_url)) {
  63                                 /*$tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
  64                                 $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;*/
  65                                 $tw=150; $th=120;
  66                                 $ret.= "<a href='".$embedurl."' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' style='float:left; margin: 1em; '>";
  67                                 $ret.= "<img width='$tw' height='$th' src='".$j->thumbnail_url."'>";
  68                                 $ret.= "</a>";
  69                         } else {
  70                                 $ret=$j->html;
  71                         }
  72                         $ret.="<br>";
  73                 }; break;
  74                 case "photo": {
  75                         $ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  76                         $ret.="<br>";
  77                 }; break;
  78                 case "link": {
  79                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  80                 }; break;
  81                 case "rich": {
  82                         // not so safe..
  83                         $ret.= "<blockquote>".$j->html."</blockquote>";
  84                 }; break;
  85         }
  86
  87         $embedlink = (isset($j->title))?$j->title:$embedurl;
  88         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
  89         if (isset($j->author_name)) $ret.=" by ".$j->author_name;
  90         if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
  91         $ret.="<br style='clear:left'></span>";
  92         return $ret;
  93 }
  94
  95 function oembed_bbcode2html($text){
  96         $stopoembed = get_config("system","no_oembed");
  97         if ($stopoembed == true){
  98                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
  99         }
 100         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 101 }
 102
 103
 104 function oe_build_xpath($attr, $value){
 105         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 106         return "contains( normalize-space( @$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'";
 107 }
 108
 109 function oe_get_inner_html( $node ) {
 110     $innerHTML= '';
 111     $children = $node->childNodes;
 112     foreach ($children as $child) {
 113         $innerHTML .= $child->ownerDocument->saveXML( $child );
 114     }
 115     return $innerHTML;
 116 }
 117
 118 /**
 119  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 120  * and replace it with [embed]url[/embed]
 121  */
 122 function oembed_html2bbcode($text) {
 123         // start parser only if 'oembed' is in text
 124         if (strpos($text, "oembed")){
 125
 126                 // convert non ascii chars to html entities
 127                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 128
 129                 // If it doesn't parse at all, just return the text.
 130                 $dom = @DOMDocument::loadHTML($html_text);
 131                 if(! $dom)
 132                         return $text;
 133                 $xpath = new DOMXPath($dom);
 134                 $attr = "oembed";
 135
 136                 $xattr = oe_build_xpath("class","oembed");
 137                 $entries = $xpath->query("//span[$xattr]");
 138
 139                 $xattr = oe_build_xpath("rel","oembed");
 140                 foreach($entries as $e) {
 141                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 142                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 143                 }
 144                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 145         } else {
 146                 return $text;
 147         }
 148 }
 149
 150 ?>