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<?php /** @file */
function oembed_replacecb($matches){
$embedurl=$matches[1];
// implements a personal embed white/black list for logged in members
if(local_channel()) {
if(($x = get_pconfig(local_channel(),'system','embed_deny'))) {
$l = explode("\n",$x);
if($l) {
foreach($l as $ll) {
if(trim($ll) && strpos($embedurl,trim($ll)) !== false)
return '<a href="' . $embedurl . '">' . $embedurl . '</a>';
}
}
}
if(($x = get_pconfig(local_channel(),'system','embed_allow'))) {
$found = false;
$l = explode("\n",$x);
if($l) {
foreach($l as $ll) {
if(trim($ll) && strpos($embedurl,trim($ll)) !== false) {
$found = true;
break;
}
}
}
if(! $found) {
return '<a href="' . $embedurl . '">' . $embedurl . '</a>';
}
}
}
$j = oembed_fetch_url($embedurl);
$s = oembed_format_object($j);
return $s;
}
// if the url is embeddable with oembed, return the bbcode link.
function oembed_process($url) {
$j = oembed_fetch_url($url);
logger('oembed_process: ' . print_r($j,true));
if($j && $j->type !== 'error')
return '[embed]' . $url . '[/embed]';
return false;
}
function oembed_fetch_url($embedurl){
$a = get_app();
$txt = Cache::get($a->videowidth . $embedurl);
if(strstr($txt,'youtu') && strstr(z_root(),'https:')) {
$txt = str_replace('http:','https:',$txt);
}
// These media files should now be caught in bbcode.php
// left here as a fallback in case this is called from another source
$noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm","opus");
$ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
if(is_null($txt)){
$txt = "";
if (in_array($ext, $noexts)) {
require_once('include/hubloc.php');
$zrl = is_matrix_url($embedurl);
if($zrl)
$embedurl = zid($embedurl);
}
else {
// try oembed autodiscovery
$redirects = 0;
$result = z_fetch_url($embedurl, false, $redirects, array('timeout' => 15, 'accept_content' => "text/*", 'novalidate' => true ));
if($result['success'])
$html_text = $result['body'];
if($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;
$x = z_fetch_url($href . '&maxwidth=' . $a->videowidth);
$txt = $x['body'];
break;
}
// soundcloud is now using text/json+oembed instead of application/json+oembed,
// others may be also
$entries = $xpath->query("//link[@type='text/json+oembed']");
foreach($entries as $e){
$href = $e->getAttributeNode("href")->nodeValue;
$x = z_fetch_url($href . '&maxwidth=' . $a->videowidth);
$txt = $x['body'];
break;
}
}
}
}
if ($txt==false || $txt=="") {
$x = array('url' => $embedurl,'videowidth' => $a->videowidth);
call_hooks('oembed_probe',$x);
if(array_key_exists('embed',$x))
$txt = $x['embed'];
}
$txt=trim($txt);
if ($txt[0]!="{") $txt='{"type":"error"}';
//save in cache
Cache::set($a->videowidth . $embedurl,$txt);
}
$j = json_decode($txt);
$j->embedurl = $embedurl;
return $j;
}
function oembed_format_object($j){
$a = get_app();
$embedurl = $j->embedurl;
$jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null));
$ret="<span class='oembed ".$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;
$tpl=get_markup_template('oembed_video.tpl');
if(strstr($embedurl,'youtu') && strstr(z_root(),'https:')) {
$embedurl = str_replace('http:','https:',$embedurl);
$j->thumbnail_url = str_replace('http:','https:', $j->thumbnail_url);
$jhtml = str_replace('http:','https:', $jhtml);
$j->html = str_replace('http:','https:', $j->html);
}
$ret.=replace_macros($tpl, array(
'$baseurl' => $a->get_baseurl(),
'$embedurl'=>$embedurl,
'$escapedhtml'=>base64_encode($jhtml),
'$tw'=>$tw,
'$th'=>$th,
'$turl'=>$j->thumbnail_url,
));
} else {
$ret=$jhtml;
}
$ret.="<br>";
}; break;
case "photo": {
$ret.= "<img width='".$j->width."' src='".$j->url."'>";
$ret.="<br>";
}; break;
case "link": {
if($j->thumbnail_url) {
if(is_matrix_url($embedurl)) {
$embedurl = zid($embedurl);
$j->thumbnail_url = zid($j->thumbnail_url);
}
$ret = '<a href="' . $embedurl . '" ><img src="' . $j->thumbnail_url . '" alt="thumbnail" /></a><br /><br />';
}
//$ret = "<a href='".$embedurl."'>".$j->title."</a>";
}; break;
case "rich": {
// not so safe..
$ret.= $jhtml;
}; break;
}
// add link to source if not present in "rich" type
if ( $j->type!='rich' || !strpos($j->html,$embedurl) ){
$embedlink = (isset($j->title))?$j->title:$embedurl;
$ret .= '<span class="bookmark-identifier">#^</span>' . "<a href='$embedurl' rel='oembed'>$embedlink</a>";
$ret .= "<br>";
if (isset($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;
$s = z_root() . '/oembed/' . base64url_encode($src);
// Make sure any children are sandboxed within their own iframe.
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;
}
}
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