- plugins can add now their page to the admin page

- new plugin (event_tracer) that demonstrate it and useful to see all calls 
to trigger_event

git-svn-id: http://piwigo.org/svn/trunk@1580 68402e56-0260-453c-a942-63ccdbb3a9ee

plugins/event_tracer/index.php

@@ -0,0 +1,90 @@
+<?php
+/*
+Plugin Name: Event tracer
+Version: 1.0
+Description: For developers. Shows all calls to trigger_event.
+Plugin URI: http://www.phpwebgallery.net
+*/
+if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');
+
+class EventTracer
+{
+  var $me_working;
+  var $my_config;
+
+  function EventTracer()
+  {
+    $this->me_working=0;
+  }
+
+  function load_config()
+  {
+    $x = @file_get_contents( dirname(__FILE__).'/tracer.dat' );
+    if ($x!==false)
+    {
+      $c = unserialize($x);
+      // do some more tests here
+      $this->my_config = $c;
+    }
+    if ( !isset($this->my_config)
+        or empty($this->my_config['filters']) )
+    {
+      $this->my_config['filters'] = array( '.*' );
+      $this->my_config['show_args'] = false;
+      $this->save_config();
+    }
+  }
+
+  function save_config()
+  {
+    $file = fopen( dirname(__FILE__).'/tracer.dat', 'w' );
+    fwrite($file, serialize($this->my_config) );
+    fclose( $file );
+  }
+
+  function pre_trigger_event($event_info)
+  {
+    if (!$this->me_working)
+    {
+      foreach( $this->my_config['filters'] as $filter)
+      {
+        if ( preg_match( '/'.$filter.'/', $event_info['event'] ) )
+        {
+          if ($this->my_config['show_args'])
+            $s = var_export( $event_info['data'], true );
+          else
+            $s = '';
+          pwg_debug('begin trigger_event "'.$event_info['event'].'" '.htmlspecialchars($s) );
+          break;
+        }
+      }
+    }
+  }
+
+  /*function post_trigger_event($filter_info)
+  {
+    if (!$this->me_working)
+    {
+      $s = var_export( $filter_info['data'], true );
+      pwg_debug('end trigger_event '.$filter_info['event'].' '.$s );
+    }
+  }*/
+
+  function plugin_admin_menu()
+  {
+    add_plugin_admin_menu( "Event Tracer", array(&$this, 'do_admin') );
+  }
+
+  function do_admin($my_url)
+  {
+    include( dirname(__FILE__).'/tracer_admin.php' );
+  }
+
+}
+
+$eventTracer = new EventTracer();
+$eventTracer->load_config();
+
+add_event_handler('plugin_admin_menu', array(&$eventTracer, 'plugin_admin_menu') );
+add_event_handler('pre_trigger_event', array(&$eventTracer, 'pre_trigger_event') );
+?>

plugins/event_tracer/tracer_admin.php

@@ -0,0 +1,23 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');
+
+global $template;
+$template->set_filenames( array('plugin_admin_content' => dirname(__FILE__).'/tracer_admin.tpl') );
+
+if ( isset($_POST['eventTracer_filters']) )
+{
+  $v = $_POST['eventTracer_filters'];
+  $v = str_replace( "\r\n", "\n", $v );
+  $v = str_replace( "\n\n", "\n", $v );
+  $this->my_config['filters'] = explode("\n", $v);
+  $this->my_config['show_args'] = isset($_POST['eventTracer_show_args']);
+  $this->save_config();
+  global $page;
+  array_push($page['infos'], 'event tracer options saved');
+}
+$template->assign_var('EVENT_TRACER_FILTERS', implode("\n", $this->my_config['filters'] ) );
+$template->assign_var('EVENT_TRACER_SHOW_ARGS', $this->my_config['show_args'] ? 'checked="checked"' : '' );
+$template->assign_var('EVENT_TRACER_F_ACTION', $my_url);
+
+$template->assign_var_from_handle( 'PLUGIN_ADMIN_CONTENT', 'plugin_admin_content');
+?>

plugins/event_tracer/tracer_admin.tpl

@@ -0,0 +1,22 @@
+<p>
+The event tracer is a developer tool that logs in the footer of the window all calls to trigger_event method.
+You can use this plugin to see what events is PhpWebGallery calling.
+<b>Note that $conf['show_queries'] must be true.</b>
+</p>
+<form method="post" action="{EVENT_TRACER_F_ACTION}" class="general">
+<fieldset>
+	<legend>Event Tracer</legend>
+
+<label>Show event argument
+	<input type="checkbox" name="eventTracer_show_args" value="{EVENT_TRACER_SHOW_ARGS}" />
+</label>
+<br/>
+<label>Fill below a list of regular expressions (one per line).
+An event will be logged if its name matches at least one expression in the list.
+	<textarea name="eventTracer_filters" id="eventTracer_filters"rows="10" cols="80">{EVENT_TRACER_FILTERS}</textarea>
+</label>
+
+</fieldset>
+
+<p><input type="submit" value="Submit" /></p>
+</form>