A simple Events collector for the Toolbar. Fixes #84

application/Config/App.php

@@ -279,6 +279,7 @@ class App extends BaseConfig
 //		'CodeIgniter\Debug\Toolbar\Collectors\Cache',
 		'CodeIgniter\Debug\Toolbar\Collectors\Files',
 		'CodeIgniter\Debug\Toolbar\Collectors\Routes',
+		'CodeIgniter\Debug\Toolbar\Collectors\Events',
 	];
 
 	/*

application/Controllers/Checks.php

@@ -299,5 +299,9 @@ EOF;
 ;
 	}
 
+	public function parser()
+	{
+		$this->parser = Services::parser();
+	}
 
 }

system/Debug/Toolbar/Collectors/Events.php

@@ -0,0 +1,171 @@
+<?php namespace CodeIgniter\Debug\Toolbar\Collectors;
+
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014-2017 British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package      CodeIgniter
+ * @author       CodeIgniter Dev Team
+ * @copyright    2014-2017 British Columbia Institute of Technology (https://bcit.ca/)
+ * @license      https://opensource.org/licenses/MIT	MIT License
+ * @link         https://codeigniter.com
+ * @since        Version 4.0.0
+ * @filesource
+ */
+use CodeIgniter\Services;
+use CodeIgniter\View\RendererInterface;
+
+/**
+ * Views collector
+ */
+class Events extends BaseCollector
+{
+
+	/**
+	 * Whether this collector has data that can
+	 * be displayed in the Timeline.
+	 *
+	 * @var bool
+	 */
+	protected $hasTimeline = false;
+
+	/**
+	 * Whether this collector needs to display
+	 * content in a tab or not.
+	 *
+	 * @var bool
+	 */
+	protected $hasTabContent = true;
+
+	/**
+	 * Whether this collector has data that
+	 * should be shown in the Vars tab.
+	 *
+	 * @var bool
+	 */
+	protected $hasVarData = false;
+
+	/**
+	 * The 'title' of this Collector.
+	 * Used to name things in the toolbar HTML.
+	 *
+	 * @var string
+	 */
+	protected $title = 'Events';
+
+	/**
+	 * Instance of the Renderer service
+	 * @var RendererInterface
+	 */
+	protected $viewer;
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct()
+	{
+		$this->viewer = Services::renderer(null, true);
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Child classes should implement this to return the timeline data
+	 * formatted for correct usage.
+	 *
+	 * @return mixed
+	 */
+	protected function formatTimelineData(): array
+	{
+		$data = [];
+
+		$rows = $this->viewer->getPerformanceData();
+
+		foreach ($rows as $name => $info)
+		{
+			$data[] = [
+				'name'		 => 'View: ' . $info['view'],
+				'component'	 => 'Views',
+				'start'		 => $info['start'],
+				'duration'	 => $info['end'] - $info['start']
+			];
+		}
+
+		return $data;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Returns the HTML to fill the Events tab in the toolbar.
+	 *
+	 * @return string The data formatted for the toolbar.
+	 */
+	public function display(): string
+	{
+		$parser = \Config\Services::parser(BASEPATH . 'Debug/Toolbar/Views/', null,false);
+
+		$data = [
+			'events' => []
+		];
+
+		foreach (\CodeIgniter\Events\Events::getPerformanceLogs() as $row)
+		{
+			$key = $row['event'];
+
+			if (! array_key_exists($key, $data['events']))
+			{
+				$data['events'][$key] = [
+					'event' => $key,
+					'duration' => number_format(($row['end']-$row['start']) * 1000, 2),
+					'count' => 1,
+				];
+
+				continue;
+			}
+
+			$data['events'][$key]['duration'] += number_format(($row['end']-$row['start']) * 1000, 2);
+			$data['events'][$key]['count']++;
+		}
+
+		$output = $parser->setData($data)
+		                 ->render('_events.tpl');
+
+		return $output;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Gets the "badge" value for the button.
+	 */
+	public function getBadgeValue()
+	{
+		return count(\CodeIgniter\Events\Events::getPerformanceLogs());
+	}
+}

system/Debug/Toolbar/Views/_events.tpl.php

@@ -0,0 +1,18 @@
+<table>
+    <thead>
+        <tr>
+            <th style="width: 6rem;">Time</th>
+            <th>Event Name</th>
+            <th>Times Called</th>
+        </tr>
+    </thead>
+    <tbody>
+    {events}
+        <tr>
+            <td class="narrow">{ duration } ms</td>
+            <td>{event}</td>
+            <td>{count}</td>
+        </tr>
+    {/events}
+    </tbody>
+</table>

system/Events/Events.php

@@ -181,9 +181,7 @@ class Events
 				static::$performanceLog[] = [
 					'start' => $start,
 					'end' => microtime(true),
-					'event' => strtolower($eventName),
-					'listener' => $listener,
-					'arguments' => $arguments
+					'event' => strtolower($eventName)
 				];
 			}