<?php
function oembed_replacecb($matches){
logger('oembedcb');
$embedurl=$matches[1];
$j = oembed_fetch_url($embedurl);
$s = oembed_format_object($j);
return oembed_iframe($s,$j->width,$j->height);
}
function oembed_fetch_url($embedurl){
$txt = Cache::get($embedurl);
if(is_null($txt)){
$txt = "";
// try oembed autodiscovery
$redirects = 0;
$html_text = fetch_url($embedurl, false, $redirects, 15);
if($html_text){
$dom = @DOMDocument::loadHTML($html_text);
if ($dom){
$xpath = new DOMXPath($dom);
$attr = "oembed";
$xattr = oe_build_xpath("class","oembed");
$entries = $xpath->query("//link[@type='application/json+oembed']");
foreach($entries as $e){
$href = $e->getAttributeNode("href")->nodeValue;
$txt = fetch_url($href);
}
}
}
if ($txt==false || $txt==""){
// try oohembed service
$ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);
$txt = fetch_url($ourl);
}
$txt=trim($txt);
if ($txt[0]!="{") $txt='{"type":"error"}';
//save in cache
Cache::set($embedurl,$txt);
}
$j = json_decode($txt);
$j->embedurl = $embedurl;
return $j;
}
function oembed_format_object($j){
$embedurl = $j->embedurl;
$ret="<span class='oembed ".$j->type."'>";
switch ($j->type) {
case "video": {
if (isset($j->thumbnail_url)) {
$tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
$th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;
$tr = $tw/$th;
$th=120; $tw = $th*$tr;
$tpl=get_markup_template('oembed_video.tpl');
$ret.=replace_macros($tpl, array(
'$embedurl'=>$embedurl,
'$escapedhtml'=>urlencode($j->html),
'$tw'=>$tw,
'$th'=>$th,
'$turl'=>$j->thumbnail_url,
));
} else {
$ret=$j->html;
}
$ret.="<br>";
}; break;
case "photo": {
$ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
$ret.="<br>";
}; break;
case "link": {
//$ret = "<a href='".$embedurl."'>".$j->title."</a>";
}; break;
case "rich": {
// not so safe..
$ret.= $j->html;
}; break;
}
// add link to source if not present in "rich" type
if ( $j->type!='rich' || !strpos($ret,$embedurl) ){
$embedlink = (isset($j->title))?$j->title:$embedurl;
$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
if (isset($j->author_name)) $ret.=" by ".$j->author_name;
if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
} else {
// add <a> for html2bbcode conversion
$ret .= "<a href='$embedurl' rel='oembed'/>";
}
$ret.="<br style='clear:left'></span>";
return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
}
function oembed_iframe($src,$width,$height) {
if(! $width || strstr($width,'%'))
$width = '640';
if(! $height || strstr($height,'%'))
$height = '300';
// try and leave some room for the description line.
$height = intval($height) + 80;
$width = intval($width) + 40;
$s = 'data:text/html;base64,' . base64_encode('<html><body>' . $src . '</body></html>');
return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>';
}
function oembed_bbcode2html($text){
$stopoembed = get_config("system","no_oembed");
if ($stopoembed == true){
return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
}
return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
}
function oe_build_xpath($attr, $value){
// http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
return "contains( normalize-space( @$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'";
}
function oe_get_inner_html( $node ) {
$innerHTML= '';
$children = $node->childNodes;
foreach ($children as $child) {
$innerHTML .= $child->ownerDocument->saveXML( $child );
}
return $innerHTML;
}
/**
* Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
* and replace it with [embed]url[/embed]
*/
function oembed_html2bbcode($text) {
// start parser only if 'oembed' is in text
if (strpos($text, "oembed")){
// convert non ascii chars to html entities
$html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
// If it doesn't parse at all, just return the text.
$dom = @DOMDocument::loadHTML($html_text);
if(! $dom)
return $text;
$xpath = new DOMXPath($dom);
$attr = "oembed";
$xattr = oe_build_xpath("class","oembed");
$entries = $xpath->query("//span[$xattr]");
$xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
foreach($entries as $e) {
$href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
}
return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
} else {
return $text;
}
}
