rework class system to use subdirectories

add placeholder plugin/hook system

classes/plugins.php

@@ -0,0 +1,44 @@
+<?php
+class Plugins {
+	protected $link;
+	protected $plugins;
+	protected $listeners;
+
+	function __construct($link) {
+		$this->link = $link;
+		$this->listeners = array();
+		$this->load_plugins();
+	}
+
+	function load_plugins() {
+		if (defined('_ENABLE_PLUGINS')) {
+			$plugins = explode(",", _ENABLE_PLUGINS);
+
+			foreach ($plugins as $p) {
+				$plugin_class = "plugin_$p";
+				if (class_exists($plugin_class)) {
+					$plugin = new $plugin_class($this->link, $this);
+				}
+			}
+		}
+	}
+
+	function add_listener($hook_name, $plugin) {
+		if (!is_array($this->listeners[$hook_name]))
+			$this->listeners[$hook_name] = array();
+
+		array_push($this->listeners[$hook_name], $plugin);
+	}
+
+	function hook($hook_name, &$params) {
+		if (is_array($this->listeners[$hook_name])) {
+			foreach ($this->listeners[$hook_name] as $p) {
+				if (method_exists($p, $hook_name)) {
+					$p->$hook_name($params);
+				}
+			}
+		}
+	}
+
+}
+?>