From 3903835cb497e9d9826d728837caa8490066d89c Mon Sep 17 00:00:00 2001
From: Grischa Brockhaus <github@brockha.us>
Date: Wed, 14 Dec 2011 03:10:36 +0100
Subject: [PATCH] Initial: OEmbed Plugin

---
 serendipity_event_oembed/lang_de.inc.php      |  9 +++
 serendipity_event_oembed/lang_en.inc.php      | 10 +++
 .../oembed/EmbedProvider.class.php            | 12 +++
 .../oembed/Exception404.class.php             |  3 +
 .../oembed/LinkEmbed.class.php                |  4 +
 .../oembed/OEmbed.class.php                   | 23 ++++++
 .../oembed/OEmbedProvider.class.php           | 74 +++++++++++++++++
 .../oembed/PhotoEmbed.class.php               |  6 ++
 .../oembed/ProviderManager.class.php          | 45 +++++++++++
 .../oembed/RichEmbed.class.php                |  6 ++
 .../oembed/VideoEmbed.class.php               |  7 ++
 .../oembed/YouTubeProvider.class.php          | 80 +++++++++++++++++++
 serendipity_event_oembed/oembed/config.php    | 10 +++
 serendipity_event_oembed/oembed/providers.xml | 24 ++++++
 .../oembed/tests/OEmbedTest.php               | 24 ++++++
 .../oembed/tests/ProviderManagerTest.php      | 24 ++++++
 .../oembed/tests/ProviderXmlTest.php          |  8 ++
 .../oembed/tests/YouTubeTest.php              | 12 +++
 .../serendipity_event_oembed.php              | 66 +++++++++++++++
 19 files changed, 447 insertions(+)
 create mode 100755 serendipity_event_oembed/lang_de.inc.php
 create mode 100755 serendipity_event_oembed/lang_en.inc.php
 create mode 100644 serendipity_event_oembed/oembed/EmbedProvider.class.php
 create mode 100644 serendipity_event_oembed/oembed/Exception404.class.php
 create mode 100644 serendipity_event_oembed/oembed/LinkEmbed.class.php
 create mode 100644 serendipity_event_oembed/oembed/OEmbed.class.php
 create mode 100644 serendipity_event_oembed/oembed/OEmbedProvider.class.php
 create mode 100644 serendipity_event_oembed/oembed/PhotoEmbed.class.php
 create mode 100644 serendipity_event_oembed/oembed/ProviderManager.class.php
 create mode 100644 serendipity_event_oembed/oembed/RichEmbed.class.php
 create mode 100644 serendipity_event_oembed/oembed/VideoEmbed.class.php
 create mode 100644 serendipity_event_oembed/oembed/YouTubeProvider.class.php
 create mode 100644 serendipity_event_oembed/oembed/config.php
 create mode 100644 serendipity_event_oembed/oembed/providers.xml
 create mode 100644 serendipity_event_oembed/oembed/tests/OEmbedTest.php
 create mode 100644 serendipity_event_oembed/oembed/tests/ProviderManagerTest.php
 create mode 100644 serendipity_event_oembed/oembed/tests/ProviderXmlTest.php
 create mode 100644 serendipity_event_oembed/oembed/tests/YouTubeTest.php
 create mode 100644 serendipity_event_oembed/serendipity_event_oembed.php

diff --git a/serendipity_event_oembed/lang_de.inc.php b/serendipity_event_oembed/lang_de.inc.php
new file mode 100755
index 00000000..3896913c
--- /dev/null
+++ b/serendipity_event_oembed/lang_de.inc.php
@@ -0,0 +1,9 @@
+<?php # $Id: lang_en.inc.php,v 1.1 2006/08/16 04:49:12 elf2000 Exp $
+
+/**
+ *  @version $Revision: 1.1 $
+ *  @author Translator Name <yourmail@example.com>
+ *  EN-Revision: Revision of lang_en.inc.php
+ */
+
+@define('PLUGIN_EVENT_OEMBED_NAME',      'oEmbed Plugin');
diff --git a/serendipity_event_oembed/lang_en.inc.php b/serendipity_event_oembed/lang_en.inc.php
new file mode 100755
index 00000000..e76e12a8
--- /dev/null
+++ b/serendipity_event_oembed/lang_en.inc.php
@@ -0,0 +1,10 @@
+<?php # $Id: lang_en.inc.php,v 1.1 2006/08/16 04:49:12 elf2000 Exp $
+
+/**
+ *  @version $Revision: 1.1 $
+ *  @author Translator Name <yourmail@example.com>
+ *  EN-Revision: Revision of lang_en.inc.php
+ */
+
+@define('PLUGIN_EVENT_OEMBED_NAME',      'oEmbed Plugin');
+@define('PLUGIN_EVENT_OEMBED_DESC',      'oEmbed is a format for allowing an embedded representation of a URL on your blog. It allows blog articles to display embedded content (such as tweets, photos or videos) when a user posts a link to that resource, without having to parse the resource directly.');
diff --git a/serendipity_event_oembed/oembed/EmbedProvider.class.php b/serendipity_event_oembed/oembed/EmbedProvider.class.php
new file mode 100644
index 00000000..ad94760c
--- /dev/null
+++ b/serendipity_event_oembed/oembed/EmbedProvider.class.php
@@ -0,0 +1,12 @@
+<?php
+abstract class EmbedProvider {
+  public $url;
+  public $endpoint;
+  public abstract function match($url);
+  public abstract function provide($url,$format="json");
+//  public abstract function register();
+  public function __construct($url,$endpoint){
+    $this->url = $url;
+    $this->endpoint = $endpoint;
+  }
+}
diff --git a/serendipity_event_oembed/oembed/Exception404.class.php b/serendipity_event_oembed/oembed/Exception404.class.php
new file mode 100644
index 00000000..4e93adf4
--- /dev/null
+++ b/serendipity_event_oembed/oembed/Exception404.class.php
@@ -0,0 +1,3 @@
+<?php
+class Exception404 extends Exception{
+}
diff --git a/serendipity_event_oembed/oembed/LinkEmbed.class.php b/serendipity_event_oembed/oembed/LinkEmbed.class.php
new file mode 100644
index 00000000..ddb7a2d6
--- /dev/null
+++ b/serendipity_event_oembed/oembed/LinkEmbed.class.php
@@ -0,0 +1,4 @@
+<?
+class LinkEmbed extends OEmbed{
+
+}
diff --git a/serendipity_event_oembed/oembed/OEmbed.class.php b/serendipity_event_oembed/oembed/OEmbed.class.php
new file mode 100644
index 00000000..d0ffcdf9
--- /dev/null
+++ b/serendipity_event_oembed/oembed/OEmbed.class.php
@@ -0,0 +1,23 @@
+<?php
+abstract class OEmbed{// extends LazyTemplateEngine{
+  public $type;
+  public $version;
+  public $title;
+  public $author_name;
+  public $author_url;
+  public $provider_name;
+  public $provider_url;
+  public $cache_age;
+  public $description; // added by me, not part of OEmbed
+  public $resource_url; // added by me, not part of OEmbed
+  public $thumbnail_url;
+  public $thumbnail_width;
+  public $thumbnail_height;
+  
+  public function cloneObj($object){
+  foreach($object as $key=>$value){
+    $this->$key=(string)$value;
+  }
+  }
+}
+
diff --git a/serendipity_event_oembed/oembed/OEmbedProvider.class.php b/serendipity_event_oembed/oembed/OEmbedProvider.class.php
new file mode 100644
index 00000000..94345e82
--- /dev/null
+++ b/serendipity_event_oembed/oembed/OEmbedProvider.class.php
@@ -0,0 +1,74 @@
+<?php
+class OEmbedProvider extends EmbedProvider{
+    private $urlRegExp;
+    private $jsonEndpoint;
+    private $xmlEndpoint;
+    public function __construct($url,$endpoint){
+        parent::__construct($url,$endpoint);
+        $this->urlRegExp=preg_replace(array("/\*/","/\//","/\.\*\./"),array(".*","\/",".*"),$url);
+        $this->urlRegExp="/".$this->urlRegExp."/";
+        if (preg_match("/\{format\}/",$endpoint)){
+            $this->jsonEndpoint=preg_replace("/\{format\}/","json",$endpoint);
+            $this->jsonEndpoint.="?url={url}";
+            $this->xmlEndpoint=preg_replace("/\{format\}/","xml",$endpoint);
+            $this->xmlEndpoint.="?url={url}";
+        } else {
+            $this->jsonEndpoint=$endpoint."?url={url}&format=json";
+            $this->xmlEndpoint=$endpoint."?url={url}&format=xml";
+        }
+    }
+
+    public function getUrlRegExp(){   return $this->urlRegExp; }
+    public function getJsonEndpoint(){ return $this->jsonEndpoint; }
+    public function getXmlEndpoint(){ return $this->xmlEndpoint; }
+
+    public function match($url){
+        return preg_match($this->urlRegExp,$url);
+    }
+    private function provideXML($url){
+        return file_get_contents(preg_replace("/\{url\}/",urlencode($url),$this->xmlEndpoint));
+    }
+    private function getTypeObj($type){
+        switch($type){
+            case "photo":
+                return new PhotoEmbed();
+                break;
+            case "video":
+                return new VideoEmbed();
+                break;
+            case "link":
+                return new LinkEmbed();
+                break;
+            case "rich":
+                return new RichEmbed();
+                break;
+            default:
+                return new OEmbed();
+        }
+    }
+    private function provideObject($url){
+        $xml=simplexml_load_string($this->provideXML($url));
+        //TODO $xml->type alapjan assigner
+        $obj = $this->getTypeObj((string)$xml->type);
+        $obj->cloneObj($xml);
+        $obj->resource_url=$url;
+        return $obj;
+    }
+    private function provideSerialized($url){
+        $serialized=serialize($this->provideObject($url));
+        return $serialized;
+    }
+    public function provide($url,$format="json"){
+        if($format=="xml"){
+            return $this->provideXML($url);
+        } else if ($format=="object"){
+            return $this->provideObject($url);
+        } else if ($format=="serialized"){
+            return $this->provideSerialized($url);
+        } else {
+            return file_get_contents(preg_replace("/\{url\}/",urlencode($url),$this->jsonEndpoint));
+        }
+    }
+    public function register(){}
+}
+
diff --git a/serendipity_event_oembed/oembed/PhotoEmbed.class.php b/serendipity_event_oembed/oembed/PhotoEmbed.class.php
new file mode 100644
index 00000000..da482ff5
--- /dev/null
+++ b/serendipity_event_oembed/oembed/PhotoEmbed.class.php
@@ -0,0 +1,6 @@
+<?
+class PhotoEmbed extends OEmbed{
+    public $url;
+    public $width;
+    public $height;
+}
diff --git a/serendipity_event_oembed/oembed/ProviderManager.class.php b/serendipity_event_oembed/oembed/ProviderManager.class.php
new file mode 100644
index 00000000..a938fdd2
--- /dev/null
+++ b/serendipity_event_oembed/oembed/ProviderManager.class.php
@@ -0,0 +1,45 @@
+<?php
+/*
+ * PHP OEmbed provider/proxy - for details, visit
+ *
+ * http://code.google.com/p/php-oembed/
+ *
+ * Copyright(C) by Adam Nemeth. Licensed under New BSD license.
+ *
+ * I would love to hear every feedback on aadaam at googlesmailservice
+ *
+ */
+class ProviderManager{
+    private $providers;
+    private static $_instance;
+    private function __construct(){
+        $this->providers=array();
+        $xml = simplexml_load_file(PROVIDER_XML);// PROVIDER_XML comes from config.php
+        foreach($xml->provider as $provider){
+            if(!isset($provider->class) && isset($provider->endpoint)){
+                $this->register(new OEmbedProvider($provider->url,$provider->endpoint));
+            } else {
+                $classname="".$provider->class; // force to be string :)
+                $reflection = new ReflectionClass($classname);
+                $this->register($reflection->newInstance($provider));//so we could pass config vars
+            }
+        }
+    }
+    static function getInstance(){
+        if(!isset($_instance) || $_instance==null){
+            $_instance = new ProviderManager();
+        }
+        return $_instance;
+    }
+    public function register($provider){
+        $this->providers[]=$provider;
+    }
+    public function provide($url,$format){
+        foreach ($this->providers as $provider){
+            if ($provider->match($url)){
+                return $provider->provide($url,$format);
+            }
+        }
+        return null;
+    }
+}
diff --git a/serendipity_event_oembed/oembed/RichEmbed.class.php b/serendipity_event_oembed/oembed/RichEmbed.class.php
new file mode 100644
index 00000000..18274118
--- /dev/null
+++ b/serendipity_event_oembed/oembed/RichEmbed.class.php
@@ -0,0 +1,6 @@
+<?
+class RichEmbed extends OEmbed {
+    public $html;
+    public $width;
+    public $height;
+}
diff --git a/serendipity_event_oembed/oembed/VideoEmbed.class.php b/serendipity_event_oembed/oembed/VideoEmbed.class.php
new file mode 100644
index 00000000..1a7c6a57
--- /dev/null
+++ b/serendipity_event_oembed/oembed/VideoEmbed.class.php
@@ -0,0 +1,7 @@
+<?
+class VideoEmbed extends OEmbed {
+    public $html;
+    public $width;
+    public $height;
+    public $duration; // added by me, not part of OEmbed
+}
diff --git a/serendipity_event_oembed/oembed/YouTubeProvider.class.php b/serendipity_event_oembed/oembed/YouTubeProvider.class.php
new file mode 100644
index 00000000..2bf03ec4
--- /dev/null
+++ b/serendipity_event_oembed/oembed/YouTubeProvider.class.php
@@ -0,0 +1,80 @@
+<?php
+class YouTubeProvider extends EmbedProvider {
+    public function match($url){
+        return preg_match('/youtube.com\/watch\?v=([\w-]+)/',$url) || preg_match('/youtu.be\/([\w-]+)/',$url); // http://youtu.be/8UVNT4wvIGY
+    }
+    public function getEmbed($url){
+        $urlArray=array();
+        if(preg_match("/(www.)?youtube.com\/watch\?v=([\w-]+)/",$url,$matches)){
+            $video_id=$matches[2];
+        }
+        else if(preg_match("/(www.)?youtu.be\/([\w-]+)/",$url,$matches)){
+            $video_id=$matches[2];
+        }
+
+        $myEmbed = new VideoEmbed();
+        $myEmbed->type='video';
+        $myEmbed->version='1.0';
+        $myEmbed->provider_name="Youtube";
+        $myEmbed->provider_url="http://youtube.com";
+        $myEmbed->resource_url=$url;
+        $xml = new DOMDocument;
+        if(@($xml->load('http://gdata.youtube.com/feeds/api/videos/'.$video_id))) {
+            @$guid = $xml->getElementsByTagName("guid")->item(0)->nodeValue;
+            $link = str_replace("http://www.youtube.com/watch?v=","http://bergengocia.net/indavideobombyoutubemashup/view.php?id=",$guid);
+            $myEmbed->title =$xml->getElementsByTagName("title")->item(0)->nodeValue;
+            $myEmbed->description =$xml->getElementsByTagNameNS("*","description")->item(0)->nodeValue;
+            $myEmbed->author_name =$xml->getElementsByTagName("author")->item(0)->getElementsByTagName("name")->item(0)->nodeValue;
+            $myEmbed->author_url =$xml->getElementsByTagName("author")->item(0)->getElementsByTagName("uri")->item(0)->nodeValue;
+            $myEmbed->thumbnail_url =$xml->getElementsByTagNameNS("*","thumbnail")->item(0)->getAttribute("url");
+            $myEmbed->thumbnail_width =$xml->getElementsByTagNameNS("*","thumbnail")->item(0)->getAttribute("width");
+            $myEmbed->thumbnail_height =$xml->getElementsByTagNameNS("*","thumbnail")->item(0)->getAttribute("height");
+            $med_content_url=$xml->getElementsByTagNameNS("http://search.yahoo.com/mrss/","content")->item(0)->getAttribute("url");
+            $myEmbed->html=
+                                  '<object width="425" height="350">'."\n".
+                                  ' <param name="movie" value="'.$med_content_url.'"></param>'."\n".
+                                  ' <embed src="'.$med_content_url.'"'. 
+                                  '  type="application/x-shockwave-flash" width="425" height="350">'."\n".
+                                  ' </embed>'."\n".
+                                  '</object>'; // according to http://code.google.com/apis/youtube/developers_guide_protocol.html#Displaying_information_about_a_video
+            $myEmbed->width="425";
+            $myEmbed->height="350"; // same as in the html
+            //$myEmbed->duration=$xml->getElementsByTagNameNS($xml->lookupNamespaceURI("*"),"content")->item(0)->getAttribute("duration");
+            //$time = floor($duration / 60) . ":" . $duration % 60;
+            return $myEmbed;
+        } else throw new Exception404("xxx");
+    }
+    private function provideXML($url){
+        $string="";
+        foreach($this->getEmbed($url) as $key=>$value){
+            if(isset($value)&& $value!="") $string.="  <".$key.">".$value."</".$key.">\n";
+        }
+        $string="<oembed>\n".$string."</oembed>";
+        return $string;
+    }
+    private function provideObject($url){
+        return $this->getEmbed($url);
+    }
+    private function provideJSON($url){
+        return json_encode($this->getEmbed($url));
+    }
+    private function provideSerialized($url){
+        return serialize($this->getEmbed($url));
+    }
+    public function provide($url,$format="json"){
+        if($format=="xml"){
+            return $this->provideXML($url);
+        } else if ($format=="object"){
+            return $this->provideObject($url);
+        } else if ($format=="serialized"){
+            return $this->provideSerialized($url);
+        } else {
+            return $this->provideJSON($url);;
+        }
+    }
+
+
+    public function __construct($config){
+        parent::__construct("http://youtube.com","");
+    }
+}
diff --git a/serendipity_event_oembed/oembed/config.php b/serendipity_event_oembed/oembed/config.php
new file mode 100644
index 00000000..2a1bc740
--- /dev/null
+++ b/serendipity_event_oembed/oembed/config.php
@@ -0,0 +1,10 @@
+<?php
+define("PROVIDER_XML",    dirname(__FILE__) . '/' . "providers.xml");
+define("TEMPLATE_PATH",   dirname(__FILE__) . '/' . "templates/");
+
+function __autoload($classname){
+  if(file_exists($x=$classname.".class.php")) {
+    require_once($x);
+  }
+}
+?>
diff --git a/serendipity_event_oembed/oembed/providers.xml b/serendipity_event_oembed/oembed/providers.xml
new file mode 100644
index 00000000..f4ccfcca
--- /dev/null
+++ b/serendipity_event_oembed/oembed/providers.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<providers>
+  <provider>
+    <url>http://*.flickr.com/*</url>
+    <endpoint>http://www.flickr.com/services/oembed/</endpoint>
+  </provider>
+  <provider>
+    <url>http://*.pownce.com/*</url>
+    <endpoint>http://api.pownce.com/2.1/oembed.{format}</endpoint>
+  </provider>
+  <provider>
+    <url>https://*.twitter.com/*</url>
+    <endpoint>https://api.twitter.com/1/statuses/oembed.{format}</endpoint>
+  </provider>
+  <provider>
+    <url>http://*.vimeo.com/*</url>
+    <endpoint>http://vimeo.com/api/oembed.{format}</endpoint>
+  </provider>
+  <provider>
+    <url>http://*.youtube.*/*</url>
+    <class>YouTubeProvider</class>
+  </provider>
+</providers>
+
diff --git a/serendipity_event_oembed/oembed/tests/OEmbedTest.php b/serendipity_event_oembed/oembed/tests/OEmbedTest.php
new file mode 100644
index 00000000..40f0ab61
--- /dev/null
+++ b/serendipity_event_oembed/oembed/tests/OEmbedTest.php
@@ -0,0 +1,24 @@
+<?
+/*
+ * PHP OEmbed provider/proxy - for details, visit
+ *
+ * http://code.google.com/p/php-oembed/
+ *
+ * Copyright(C) by Adam Nemeth. Licensed under New BSD license.
+ *
+ * I would love to hear every feedback on aadaam at googlesmailservice
+ *
+ */
+require_once(dirname(__FILE__) . '/../' . "config.php");
+$xml = simplexml_load_file(dirname(__FILE__) . '/../' . "providers.xml");
+foreach($xml->provider as $provider){
+ // $x = new OEmbedProvider("http://*.flickr.com/*","http://www.flickr.com/services/oembed/");
+ $x = new OEmbedProvider($provider->url,$provider->endpoint);
+  echo $x->url.":\n";
+  if ($x->match("http://www.flickr.com/photos/bees/2341623661/")){
+    print_r($x->provide("http://www.flickr.com/photos/bees/2341623661/","object"));
+  }
+  echo " ".$x->getUrlRegExp()."\n";
+  echo " ".$x->getJsonEndpoint()."\n";
+  echo " ".$x->getXmlEndpoint()."\n";
+}
diff --git a/serendipity_event_oembed/oembed/tests/ProviderManagerTest.php b/serendipity_event_oembed/oembed/tests/ProviderManagerTest.php
new file mode 100644
index 00000000..9ad199cd
--- /dev/null
+++ b/serendipity_event_oembed/oembed/tests/ProviderManagerTest.php
@@ -0,0 +1,24 @@
+<?
+/** Testfile für die Provider Konfiguration
+ * @author: Grischa Brockhaus
+ */
+
+require_once(dirname(__FILE__) . '/../' . "config.php");
+
+function test($manager, $url) {
+	$obj=$manager->provide($url,"object");
+	if (!empty($obj)) print_r($obj);
+}
+
+$manager = ProviderManager::getInstance();
+// Youtube long link
+test($manager,"http://www.youtube.com/watch?v=8UVNT4wvIGY");
+ // Youtube Kurze URL
+test($manager,"http://youtu.be/8UVNT4wvIGY");
+// Twitter
+test($manager,"https://twitter.com/#!/tagesschau/status/146562892454572032");
+// flickr
+test($manager,"http://www.flickr.com/photos/gbrockhaus/2052855443/in/set-72157603214268227/");
+// vimeo
+test($manager,"http://vimeo.com/33510073");
+
diff --git a/serendipity_event_oembed/oembed/tests/ProviderXmlTest.php b/serendipity_event_oembed/oembed/tests/ProviderXmlTest.php
new file mode 100644
index 00000000..64aaaffc
--- /dev/null
+++ b/serendipity_event_oembed/oembed/tests/ProviderXmlTest.php
@@ -0,0 +1,8 @@
+<?php
+$xml = simplexml_load_file(dirname(__FILE__) . '/../' . "providers.xml");
+
+foreach($xml->provider as $provider){
+    echo $provider->url;
+    echo $provider->endpoint;
+}
+
diff --git a/serendipity_event_oembed/oembed/tests/YouTubeTest.php b/serendipity_event_oembed/oembed/tests/YouTubeTest.php
new file mode 100644
index 00000000..654c8315
--- /dev/null
+++ b/serendipity_event_oembed/oembed/tests/YouTubeTest.php
@@ -0,0 +1,12 @@
+<?
+require_once(dirname(__FILE__) . '/../' . "config.php");
+
+function testYoutubeProvider() {
+	$x = new YouTubeProvider('');
+	$obj = $x->provide("","object");
+	//print_r($obj);
+	print_r($obj->html);
+}
+
+testYoutubeProvider();
+
diff --git a/serendipity_event_oembed/serendipity_event_oembed.php b/serendipity_event_oembed/serendipity_event_oembed.php
new file mode 100644
index 00000000..ac8b8c24
--- /dev/null
+++ b/serendipity_event_oembed/serendipity_event_oembed.php
@@ -0,0 +1,66 @@
+<?php
+
+if (IN_serendipity !== true) {
+    die ("Don't hack!");
+}
+
+// Probe for a language include with constants. Still include defines later on, if some constants were missing
+$probelang = dirname(__FILE__) . '/' . $serendipity['charset'] . 'lang_' . $serendipity['lang'] . '.inc.php';
+if (file_exists($probelang)) {
+    include $probelang;
+}
+
+include dirname(__FILE__) . '/lang_en.inc.php';
+   
+class serendipity_event_oembed extends serendipity_event
+{
+    var $title = PLUGIN_EVENT_OEMBED_NAME;
+
+    function introspect(&$propbag)
+    {
+        global $serendipity;
+
+        $propbag->add('name',          PLUGIN_EVENT_OEMBED_NAME);
+        $propbag->add('description',   PLUGIN_EVENT_OEMBED_DESC);
+        $propbag->add('stackable',     false);
+        $propbag->add('author',        'Grischa Brockhaus');
+        $propbag->add('version',       '0.01');
+        $propbag->add('requirements',  array(
+            'serendipity' => '0.8',
+            'smarty'      => '2.6.7',
+            'php'         => '5.1.0'
+        ));
+        $propbag->add('groups', array('FRONTEND_EXTERNAL_SERVICES'));
+        $propbag->add('event_hooks',    array(
+            'backend_publish'   => true,    // An entry was puplished (was draft before or saved from the scratch).
+        ));
+
+        //$propbag->add('configuration', array('max_items','ext_vis_stat','stat_all','banned_bots'));
+    }
+
+    function introspect_config_item($name, &$propbag)
+    {
+    }
+
+    function event_hook($event, &$bag, &$eventData) {
+        global $serendipity;
+
+        $hooks = &$bag->get('event_hooks');
+
+        if (isset($hooks[$event])) {
+            switch($event) {
+                case 'backend_publish':
+                    $this->update_entry($eventData);
+                    return true;
+            }
+        }
+        
+        return true;
+        
+    }
+
+    function update_entry($eventData) {
+        
+    }
+
+}
\ No newline at end of file