start to add a plugin management framework

1 files changed, 90 insertions, 0 deletions

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;
+	}
+}