experimental support for per-user plugins (bump schema)

[tt-rss.git] / classes / pluginhost.php

diff --git a/classes/pluginhost.php b/classes/pluginhost.php
index a637a52169773a0ffa520450168bb2179a055f04..d8df6db49a50addaedeae1759344141d55207064 100644 (file)
--- a/classes/pluginhost.php
+++ b/classes/pluginhost.php
@@ -78,32 +78,45 @@ class PluginHost {
                        $class_file = strtolower(basename($class));
                        $file = dirname(__FILE__)."/../plugins/$class_file/$class_file.php";
 
-                       if (file_exists($file)) require_once $file;
+                       if (!isset($this->plugins[$class])) {
+                               if (file_exists($file)) require_once $file;
 
-                       if (class_exists($class) && is_subclass_of($class, "Plugin")) {
-                               $plugin = new $class($this);
+                               if (class_exists($class) && is_subclass_of($class, "Plugin")) {
+                                       $plugin = new $class($this);
 
-                               $this->register_plugin($class, $plugin);
+                                       $this->register_plugin($class, $plugin);
+                               }
                        }
                }
        }
 
+       function is_system($plugin) {
+               $about = $plugin->_about();
+
+               return @$about[3];
+       }
+
+       // only system plugins are allowed to modify routing
        function add_handler($handler, $method, $sender) {
                $handler = str_replace("-", "_", strtolower($handler));
                $method = strtolower($method);
 
-               if (!is_array($this->handlers[$handler])) {
-                       $this->handlers[$handler] = array();
-               }
+               if ($this->is_system($sender)) {
+                       if (!is_array($this->handlers[$handler])) {
+                               $this->handlers[$handler] = array();
+                       }
 
-               $this->handlers[$handler][$method] = $sender;
+                       $this->handlers[$handler][$method] = $sender;
+               }
        }
 
        function del_handler($handler, $method) {
                $handler = str_replace("-", "_", strtolower($handler));
                $method = strtolower($method);
 
-               unset($this->handlers[$handler][$method]);
+               if ($this->is_system($sender)) {
+                       unset($this->handlers[$handler][$method]);
+               }
        }
 
        function lookup_handler($handler, $method) {
@@ -121,17 +134,22 @@ class PluginHost {
                return false;
        }
 
+       // only system plugins are allowed to modify commands
        function add_command($command, $description, $sender) {
                $command = "-" . str_replace("-", "_", strtolower($command));
 
-               $this->commands[$command] = array("description" => $description,
-                       "class" => $sender);
+               if ($this->is_system($sender)) {
+                       $this->commands[$command] = array("description" => $description,
+                               "class" => $sender);
+               }
        }
 
        function del_command($command) {
                $command = "-" . strtolower($command);
 
-               unset($this->commands[$command]);
+               if ($this->is_system($sender)) {
+                       unset($this->commands[$command]);
+               }
        }
 
        function lookup_command($command) {