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