Plugins engine :)

classes/configuration.class.php

@@ -12,9 +12,7 @@ if(!defined('entry') || !entry) die('Not a valid page');
   =========================== */
 ?>
 <?php
-require_once("lang.functions.php");
-require_once('mysql_connection.class.php');
-class configuration extends Conexion_Mysql {
+class configuration {
 	
 	var $urlGelato;
 	var $tablePrefix;
@@ -31,14 +29,14 @@ class configuration extends Conexion_Mysql {
 	var $shorten_links;
 	var $rssImportFrec;
 	var $check_version;
+	var $plugins = array();	
 		
 	function configuration() {		
-		parent::Conexion_Mysql(DB_name, DB_Server, DB_User, DB_Password);
-		
 		global $isFeed;
+		global $db;
 		
-		if ($this->ejecutarConsulta("SELECT * FROM ".Table_prefix."config")) {
-			$row=$this->obtenerRegistro();
+		if ($db->ejecutarConsulta("SELECT * FROM ".Table_prefix."config")) {
+			$row=$db->obtenerRegistro();
 			$this->tablePrefix = Table_prefix;
 			$this->urlGelato = $row['url_installation'];				
 			$this->postLimit = $row['posts_limit'];
@@ -58,6 +56,16 @@ class configuration extends Conexion_Mysql {
 			$this->rssImportFrec = $this->get_option("rss_import_frec");
 			$this->check_version = $this->get_option("check_version");
 			
+			//TODO: Soporte de los plugins desde BD activar/desactivar
+			if ($handle = opendir("plugins")) {				
+				while (false !== ($file = readdir($handle))) { 
+					if (substr($file, strlen($file)-3, 3) == "php") {
+						require_once("plugins/{$file}");
+						$this->plugins[] = substr($file, 0, strlen($file)-4);						
+					} 
+				} 
+				closedir($handle); 
+			}			
 		} else {
 			if($isFeed) {
 				header("HTTP/1.0 503 Service Unavailable"); 
@@ -73,10 +81,11 @@ class configuration extends Conexion_Mysql {
 	}
 	
 	function get_option($name){
+		global $db;
 		$sql = "SELECT * FROM ".Table_prefix."options WHERE name='".$name."' LIMIT 1";
-		$this->ejecutarConsulta($sql);
-		if ($this->contarRegistros()>0) {
-			$row=$this->obtenerRegistro();
+		$db->ejecutarConsulta($sql);
+		if ($db->contarRegistros()>0) {
+			$row=$db->obtenerRegistro();
 			return $row['val'];
 		} else {
 			return "0";

classes/functions.php

@@ -646,4 +646,32 @@ if(!defined('entry') || !entry) die('Not a valid page');
 		}
 		return $out;
 	}
+
+	function init_plugins() {        
+		global $conf;
+        
+        foreach ($conf->plugins as $index => $plugin) {
+			//echo "[".$index."] => ".$plugin."<br />";
+            if (!file_exists("plugins/".$plugin.".php")) {
+				//echo "\tNo existe el archivo<br />";
+                unset($config->plugins[$index]);
+                continue;
+            }
+			//echo "\tSi existe el archivo<br />";
+            
+            if (!class_exists($plugin)) {
+				//echo "\tNo existe la clase<br />";
+                continue;
+			}
+			//echo "\tSi existe la clase<br />";
+
+            plugins::$instances[$plugin] = new $plugin;
+			/*print_r(plugins::$instances[$plugin]);
+			echo "<br />";*/
+        }
+		/*echo "<br /><br />";
+		print_r(plugins::$instances);
+		echo "<br />";
+		die();*/
+	}
 	?>

classes/plugin.class.php

@@ -0,0 +1,74 @@
+<?php
+if(!defined('entry') || !entry) die('Not a valid page');
+/* ===========================
+
+  gelato CMS - A PHP based tumblelog CMS
+  development version
+  http://www.gelatocms.com/
+
+  gelato CMS is a free software licensed under the GPL 2.0
+  Copyright (C) 2007 by Pedro Santana <pecesama at gmail dot com>
+
+  =========================== */
+?>
+<?php
+	class plugin {	
+		
+		var $actions = array();
+		var $exists = array();
+	
+		function call($name) {            
+
+            if (!$this->exists($name)) {
+                return false;
+			}            
+            
+            /*echo "<br />==========<br />";
+			echo $name;
+			echo "<br />";*/
+			
+			$index = 0;
+            foreach (plugins::$instances as $plugin) {				
+				$action = $this->actions[$name][$index][1];                
+				if (is_callable(array($plugin, $action))) {                    
+					$plugin->$action();
+				}
+				$index++;
+			}
+        }
+        
+		function exists($name) {
+            if (isset($this->exists[$name])) {
+                return $this->exists[$name];
+			}
+
+            foreach (plugins::$instances as $plugin) {
+				/*print_r(plugins::$instances);
+				echo "<br />";
+				print_r($plugin);
+				echo "<br />";
+				print_r($this->actions[$name]);
+				echo "<br />";
+				echo $this->actions[$name][0][1];
+				echo "<br />";*/                
+				if (is_callable(array($plugin, $this->actions[$name][0][1]))) {
+                    return $this->exists[$name] = true;
+				}
+			}
+
+            return $this->exists[$name] = false;
+        }		
+        
+		function & instance()
+        {
+            static $instance;
+
+            if( !isset($instance) ) {
+                $instance = new self();
+            }
+
+            return $instance;
+        }
+		
+	}
+?>

classes/plugins.class.php

@@ -0,0 +1,25 @@
+<?php
+if(!defined('entry') || !entry) die('Not a valid page');
+/* ===========================
+
+  gelato CMS - A PHP based tumblelog CMS
+  development version
+  http://www.gelatocms.com/
+
+  gelato CMS is a free software licensed under the GPL 2.0
+  Copyright (C) 2007 by Pedro Santana <pecesama at gmail dot com>
+
+  =========================== */
+?>
+<?php	
+	class plugins {
+		
+		static $instances = array();
+		
+		function addAction($name, $function) {
+	    	$plugEngine = plugin::instance();
+	    	$plugEngine->actions[$name][] = array($this, $function);	    	
+	    }
+		
+	}
+?>

entry.php

@@ -3,10 +3,11 @@ ob_start();
 if(!defined('entry') || !entry) die('Not a valid page');
 /*
  * Created on Sep 15, 2007
- * Modified on Sep 22, 2007
+ * Modified on Oct 30, 2008
  *
  * Known Entry Points
  * api.php
+ * archive.php
  * install.php
  * index.php
  * login.php
@@ -56,6 +57,7 @@ if($installed) {
 }
 
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'configuration.class.php');
+require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'functions.php');
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'gelato.class.php');
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'templates.class.php');
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'themes.class.php');
@@ -67,17 +69,36 @@ require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'mysql_connection.class
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'streams.class.php');
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'gettext.class.php');
 require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'lang.functions.php');
+require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'plugin.class.php');
+require_once(Absolute_Path.'classes'.DIRECTORY_SEPARATOR.'plugins.class.php');
 
 if($installed){
 
 	// Globals to be used throughout the application
+	$db = new Conexion_Mysql(DB_name, DB_Server, DB_User, DB_Password);
 	$user = new user();
 	$tumble = new gelato();
 	$conf = new configuration();	
-	$db = new Conexion_Mysql(DB_name, DB_Server, DB_User, DB_Password);
 
 	session_start();
 	
+	//print_r($conf->plugins);
+	//die();
+	init_plugins();
+	$trigger = plugin::instance();
+	
+	//echo "plugins.instances: ";
+	//print_r(plugins::$instances);
+	//echo "<br />";
+	//die();
+	
+	//echo "plugin.actions: ";
+	//$plugEngine = plugin::instance();
+	//print_r($plugEngine->actions);
+	//die();
+	
+	$trigger->call('add_post');	
+
 	$feeds = new feeds();
 	$feeds->updateFeeds();
 	unset($feeds);

plugins/cinco.php

@@ -0,0 +1,15 @@
+<?php
+
+class cinco extends plugins {
+	
+	function cinco() {
+		$this->addAction('add_post', 'dameCinco');
+	}
+	
+	function dameCinco() {
+		echo "Este es el plugin 5<br />";
+	}
+	
+}
+
+?>

plugins/hola.php

@@ -0,0 +1,15 @@
+<?php
+
+class hola extends plugins {
+	
+	function hola() {
+		$this->addAction('add_post', 'saluda');		
+	}
+	
+	function saluda() {
+		echo "Hola mundo desde plugin en gelato<br />";
+	}
+	
+}
+
+?>