update SamplePlugin.php also

plugins/Sample/SamplePlugin.php

@@ -1,8 +1,12 @@
 <?php
-/*
+/**
  * StatusNet - the distributed open-source microblogging tool
  * Copyright (C) 2009, StatusNet, Inc.
  *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -15,44 +19,251 @@
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Sample
+ * @package   StatusNet
+ * @author    Brion Vibber <brionv@status.net>
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2009 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
  */
 
-/**
+if (!defined('STATUSNET')) {
- * @package SamplePlugin
- * @maintainer Your Name <you@example.com>
- */
-
-if (!defined('STATUSNET') && !defined('LACONICA')) {
     // This check helps protect against security problems;
     // your code file can't be executed directly from the web.
     exit(1);
 }
 
+/**
+ * Sample plugin main class
+ *
+ * Each plugin requires a main class to interact with the StatusNet system.
+ *
+ * The main class usually extends the Plugin class that comes with StatusNet.
+ *
+ * The class has standard-named methods that will be called when certain events
+ * happen in the code base. These methods have names like 'onX' where X is an
+ * event name (see EVENTS.txt for the list of available events). Event handlers
+ * have pre-defined arguments, based on which event they're handling. A typical
+ * event handler:
+ *
+ *    function onSomeEvent($paramA, &$paramB)
+ *    {
+ *        if ($paramA == 'jed') {
+ *            throw new Exception(sprintf(_m("Invalid parameter %s"), $paramA));
+ *        }
+ *        $paramB = 'spock';
+ *        return true;
+ *    }
+ *
+ * Event handlers must return a boolean value. If they return false, all other
+ * event handlers for this event (in other plugins) will be skipped, and in some
+ * cases the default processing for that event would be skipped. This is great for
+ * replacing the default action of an event.
+ *
+ * If the handler returns true, processing of other event handlers and the default
+ * processing will continue. This is great for extending existing functionality.
+ *
+ * If the handler throws an exception, processing will stop, and the exception's
+ * error will be shown to the user.
+ *
+ * To install a plugin (like this one), site admins add the following code to
+ * their config.php file:
+ *
+ *     addPlugin('Sample');
+ *
+ * Plugins must be installed in one of the following directories:
+ *
+ *     local/plugins/{$pluginclass}.php
+ *     local/plugins/{$name}/{$pluginclass}.php
+ *     local/{$pluginclass}.php
+ *     local/{$name}/{$pluginclass}.php
+ *     plugins/{$pluginclass}.php
+ *     plugins/{$name}/{$pluginclass}.php
+ *
+ * Here, {$name} is the name of the plugin, like 'Sample', and {$pluginclass} is
+ * the name of the main class, like 'SamplePlugin'. Plugins that are part of the
+ * main StatusNet distribution go in 'plugins' and third-party or local ones go
+ * in 'local'.
+ *
+ * Simple plugins can be implemented as a single module. Others are more complex
+ * and require additional modules; these should use their own directory, like
+ * 'local/plugins/{$name}/'. All files related to the plugin, including images,
+ * JavaScript, CSS, external libraries or PHP modules should go in the plugin
+ * directory.
+ *
+ * @category  Sample
+ * @package   StatusNet
+ * @author    Brion Vibber <brionv@status.net>
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2009 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
 class SamplePlugin extends Plugin
 {
-    function onInitializePlugin()
+    /**
+     * Plugins are configured using public instance attributes. To set
+     * their values, site administrators use this syntax:
+     *
+     * addPlugin('Sample', array('attr1' => 'foo', 'attr2' => 'bar'));
+     *
+     * The same plugin class can be initialized multiple times with different
+     * arguments:
+     *
+     * addPlugin('EmailNotify', array('sendTo' => 'evan@status.net'));
+     * addPlugin('EmailNotify', array('sendTo' => 'brionv@status.net'));
+     *
+     */
+
+    public $attr1 = null;
+    public $attr2 = null;
+
+    /**
+     * Initializer for this plugin
+     *
+     * Plugins overload this method to do any initialization they need,
+     * like connecting to remote servers or creating paths or so on.
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     */
+
+    function initialize()
     {
-        // Event handlers normally return true to indicate that all is well.
-        //
-        // Returning false will cancel further processing of any other
-        // plugins or core code hooking the same event.
         return true;
     }
 
     /**
-     * Hook for RouterInitialized event.
+     * Cleanup for this plugin
      *
-     * @param Net_URL_Mapper $m path-to-action mapper
+     * Plugins overload this method to do any cleanup they need,
-     * @return boolean hook return
+     * like disconnecting from remote servers or deleting temp files or so on.
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
      */
 
-    function onRouterInitialized($m)
+    function cleanup()
     {
-        $m->connect(':nickname/samples',
+        return true;
-                    array('action' => 'showsamples'),
+    }
-                    array('feed' => '[A-Za-z0-9_-]+'));
+
-        $m->connect('settings/sample',
+    /**
-                    array('action' => 'samplesettings'));
+     * Database schema setup
+     *
+     * Plugins can add their own tables to the StatusNet database. Plugins
+     * should use StatusNet's schema interface to add or delete tables. The
+     * ensureTable() method provides an easy way to ensure a table's structure
+     * and availability.
+     *
+     * By default, the schema is checked every time StatusNet is run (say, when
+     * a Web page is hit). Admins can configure their systems to only check the
+     * schema when the checkschema.php script is run, greatly improving performance.
+     * However, they need to remember to run that script after installing or
+     * upgrading a plugin!
+     *
+     * @see Schema
+     * @see ColumnDef
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     */
+
+    function onCheckSchema()
+    {
+        $schema = Schema::get();
+
+        // For storing user-submitted flags on profiles
+
+        $schema->ensureTable('user_greeting_count',
+                             array(new ColumnDef('user_id', 'integer', null,
+                                                 true, 'PRI'),
+                                   new ColumnDef('greeting_count', 'integer')));
+
+        return true;
+    }
+
+    /**
+     * Load related modules when needed
+     *
+     * Most non-trivial plugins will require extra modules to do their work. Typically
+     * these include data classes, action classes, widget classes, or external libraries.
+     *
+     * This method receives a class name and loads the PHP file related to that class. By
+     * tradition, action classes typically have files named for the action, all lower-case.
+     * Data classes are in files with the data class name, initial letter capitalized.
+     *
+     * Note that this method will be called for *all* overloaded classes, not just ones
+     * in this plugin! So, make sure to return true by default to let other plugins, and
+     * the core code, get a chance.
+     *
+     * @param string $cls Name of the class to be loaded
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     */
+
+    function onAutoload($cls)
+    {
+        $dir = dirname(__FILE__);
+
+        switch ($cls)
+        {
+        case 'HelloAction':
+            include_once $dir . '/' . strtolower(mb_substr($cls, 0, -6)) . '.php';
+            return false;
+        case 'User_greeting_count':
+            include_once $dir . '/'.$cls.'.php';
+            return false;
+        default:
+            return true;
+        }
+    }
+
+    /**
+     * Map URLs to actions
+     *
+     * This event handler lets the plugin map URLs on the site to actions (and
+     * thus an action handler class). Note that the action handler class for an
+     * action will be named 'FoobarAction', where action = 'foobar'. The class
+     * must be loaded in the onAutoload() method.
+     *
+     * @param Net_URL_Mapper $m path-to-action mapper
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     */
+
+    function onRouterInitialized($m)
+    {
+        $m->connect('main/hello',
+                    array('action' => 'hello'));
+        return true;
+    }
+
+    /**
+     * Modify the default menu to link to our custom action
+     *
+     * Using event handlers, it's possible to modify the default UI for pages
+     * almost without limit. In this method, we add a menu item to the default
+     * primary menu for the interface to link to our action.
+     *
+     * The Action class provides a rich set of events to hook, as well as output
+     * methods.
+     *
+     * @param Action $action The current action handler. Use this to
+     *                       do any output.
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     *
+     * @see Action
+     */
+
+    function onEndPrimaryNav($action)
+    {
+        // common_local_url() gets the correct URL for the action name
+        // we provide
+
+        $action->menuItem(common_local_url('hello'),
+                          _m('Hello'), _m('A warm greeting'), false, 'nav_hello');
         return true;
     }
 }