From 716c3a5a3a36206e93431eb5f8df3471546ec4b2 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <LukeShu@sbcglobal.net>
Date: Sun, 4 Sep 2011 20:42:32 -0400
Subject: start to add a plugin management framework

---
 index.php                        |  3 ++
 plugin-conf.php                  |  5 +++
 src/lib/ContactMethod.class.php  | 17 +++-----
 src/lib/MessageManager.class.php |  9 ++++
 src/lib/Plugin.class.php         |  8 +++-
 src/lib/PluginManager.class.php  | 90 ++++++++++++++++++++++++++++++++++++++++
 6 files changed, 120 insertions(+), 12 deletions(-)
 create mode 100644 plugin-conf.php
 create mode 100644 src/lib/PluginManager.class.php

diff --git a/index.php b/index.php
index 3a3a646..ceab3f3 100644
--- a/index.php
+++ b/index.php
@@ -41,6 +41,9 @@ require_once('Model.class.php');
 require_once('Controller.class.php');
 require_once('Router.class.php');
 
+require_once('ContactMethod.class.php');
+require('plugin-conf.php');
+
 global $mm;
 require_once('MessageManager.class.php');
 $mm = new MessageManager(BASEPATH.'/conf.php');
diff --git a/plugin-conf.php b/plugin-conf.php
new file mode 100644
index 0000000..7b397cc
--- /dev/null
+++ b/plugin-conf.php
@@ -0,0 +1,5 @@
+<?php
+new ContactMethod('sms'         , 'phone'        ,
+                  'text message', 'cell number' );
+new ContactMethod('email'       , 'email'        ,
+                  'email'       , 'email address');
diff --git a/src/lib/ContactMethod.class.php b/src/lib/ContactMethod.class.php
index c01374e..b01e7d3 100644
--- a/src/lib/ContactMethod.class.php
+++ b/src/lib/ContactMethod.class.php
@@ -16,20 +16,15 @@ class ContactMethod {
 	public function __construct($verb_slug, $addr_slug,
 	                            $verb_text, $addr_text)
 	{
-		$this->$verb_slug = $verb_slug;
-		$this->$addr_slug = $addr_slug;
-		$this->$verb_text = $verb_text;
-		$this->$addr_Text = $addr_text;
+		$this->verb_slug = $verb_slug;
+		$this->addr_slug = $addr_slug;
+		$this->verb_text = $verb_text;
+		$this->addr_text = $addr_text;
 		
 		global $CONTACT_METHODS;
-		$CONTACT_METHODS[$slug] = $this;
+		$CONTACT_METHODS[$verb_slug] = $this;
 	}
 	public function setHandler($handler) {
-		$this->$handler = $handler;
+		$this->handler = $handler;
 	}
 }
-
-new ContactMethod('sms'         , 'phone'        ,
-                  'text message', 'cell number' );
-new ContactMethod('email'       , 'email'        ,
-                  'email'       , 'email address');
diff --git a/src/lib/MessageManager.class.php b/src/lib/MessageManager.class.php
index d9d9fbc..cfcdac7 100644
--- a/src/lib/MessageManager.class.php
+++ b/src/lib/MessageManager.class.php
@@ -6,6 +6,7 @@ class MessageManager {
 	private $db_prefix;
 	private $pw_hasher;
 	private $template;
+	private $pluginManager;
 	private $base;
 	private $users = array();
 		
@@ -386,6 +387,14 @@ class MessageManager {
 		}
 		return $this->template;
 	}
+
+	public function pluginManager() {
+		if (!isset($this->pluginManager)) {
+			require_once('PluginManager.class.php');
+			$this->pluginManager = new PluginManager();
+		}
+		return $this->pluginManager;
+	}
 	
 	public function login($username, $password) {
 		$uid = $this->getUID($username);
diff --git a/src/lib/Plugin.class.php b/src/lib/Plugin.class.php
index f2251d2..8c7fad8 100644
--- a/src/lib/Plugin.class.php
+++ b/src/lib/Plugin.class.php
@@ -11,6 +11,12 @@ abstract class Plugin {
 			$this->config[$param]=$value;
 		}
 	}
+
+	public function userConfig() { return array(); }
+	protected function addConfigGroup($arr, $group) {
+		if (!isset($arr[$group]))
+			$arr[$group] = array();
+	}
 	
 	public abstract function init();
-}
\ No newline at end of file
+}
diff --git a/src/lib/PluginManager.class.php b/src/lib/PluginManager.class.php
new file mode 100644
index 0000000..22d7b0c
--- /dev/null
+++ b/src/lib/PluginManager.class.php
@@ -0,0 +1,90 @@
+<?php
+
+class PluginManager {
+	public $plugins = array();
+	private $loaded = false;
+	/**
+	 * Return an instance of the plugin with $plugin_name
+	 */
+	public function loadPlugin($plugin_name) {
+		global $mm;
+		
+		require_once("$plugin_name.class.php");
+		$obj = new $plugin_name;
+		$params = call_user_func("$plugin_name::configList");
+		foreach ($params as $param => $type) {
+			$value = $mm->getPluginConf($plugin_name, $param);
+			if ($value!==false) {
+				switch ($type) {
+				case 'text':
+				case 'password':
+					$value = "$value";
+					break;
+				case 'int':
+					$value = (int)$value;
+					break;
+				}
+				$obj->configSet($param, $value);
+			}
+		}
+		return $obj;
+	}
+	
+	/**
+	 * Return an array of available plugin names.
+	 */
+	public function listPlugins() {
+		$plugins = array();
+		
+		$dirs = explode(PATH_SEPARATOR, PLUGINPATH);
+		foreach ($dirs as $dir) {
+			// Find all files in $dir with the ext `.class.php'
+			$files = glob($dir.'/*.class.php');
+			foreach ($files as $file) {
+				$plugins[] = preg_replace('@\.class\.php$@', '$1', basename($file));
+			}
+		}
+
+		return $plugins;
+	}
+	
+	/**
+	 * Return an array of enabled plugin names.
+	 */
+	public function getActivePlugins() {
+		global $mm;
+		$string = $mm->getSysConf('plugins');
+		return $mm->valueToArray($string);
+	}
+
+	/**
+	 * Set the enabled plugins.
+	 */
+	public function setActivePlugins($plugins) {
+		global $mm;
+		$string = $mm->arrayToValue($plugins);
+		return $mm->setSysConf('plugins', $string);
+	}
+	
+	/**
+	 * Load the enabled plugins.
+	 */
+	public function loadPlugins() {
+		if ($this->loaded) return;
+		$plugin_names = $this->getActivePlugins();
+		foreach ($plugin_names as $name) {
+			$this->plugins[$name] = $this->loadPlugin($name);
+		}
+		$this->loaded = true;
+	}
+
+	public function callHook($hook, $arg=null) {
+		$this->loadPlugins();
+		$ret = array();
+		foreach ($this->plugins as $name => $plugin) {
+			$ret[$name] = call_user_func(array($plugin, $hook),
+			                             &$arg);
+		}
+		return $ret;
+	}
+}
-- 
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