Create ObjectCountCollector for count class/objects (#571)

* Create ObjectCountCollector for count class/objects

* Added ObjectCountCollector demo

demo/index.php

@@ -16,6 +16,12 @@ $debugbar['messages']->addMessage('world', 'warning');
 $debugbar['messages']->addMessage(array('toto' => array('titi', 'tata')));
 $debugbar['messages']->addMessage('oups', 'error');
 
+$classDemo = array('FirstClass', 'SecondClass', 'ThirdClass');
+$debugbar->addCollector(new \DebugBar\DataCollector\ObjectCountCollector());
+for ($i = 0; $i <=20; $i++) {
+    $debugbar['counter']->countClass($classDemo[rand(0, 2)]);
+}
+
 $debugbar['time']->startMeasure('render');
 
 render_demo_page(function() {

src/DebugBar/DataCollector/ObjectCountCollector.php

@@ -0,0 +1,99 @@
+<?php
+
+namespace DebugBar\DataCollector;
+
+use DebugBar\DataCollector\DataCollector;
+use DebugBar\DataCollector\DataCollectorInterface;
+use DebugBar\DataCollector\Renderable;
+
+/**
+ * Collector for hit counts.
+ */
+class ObjectCountCollector extends DataCollector implements DataCollectorInterface, Renderable
+{
+    /** @var string */
+    private $name;
+    /** @var string */
+    private $icon;
+    /** @var int */
+    protected $classCount = 0;
+    /** @var array */
+    protected $classList = [];
+
+    /**
+     * @param string $name
+     * @param string $icon
+     */
+    public function __construct($name = 'counter', $icon = 'cubes')
+    {
+        $this->name = $name;
+        $this->icon = $icon;
+    }
+
+    /**
+     * @param string|mixed $class
+     * @param int $count
+     */
+    public function countClass($class, $count = 1) {
+        if (! is_string($class)) {
+            $class = get_class($class);
+        }
+
+        $this->classList[$class] = ($this->classList[$class] ?? 0) + $count;
+        $this->classCount += $count;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function collect()
+    {
+        arsort($this->classList, SORT_NUMERIC);
+
+        if (! $this->getXdebugLinkTemplate()) {
+            return ['data' => $this->classList, 'count' => $this->classCount, 'is_counter' => true];
+        }
+
+        $data = [];
+        foreach ($this->classList as $class => $count) {
+            $reflector = class_exists($class) ? new \ReflectionClass($class) : null;
+
+            if ($reflector && $link = $this->getXdebugLink($reflector->getFileName())) {
+                $data[$class . '<a href="' . $link['url'] . '" class="phpdebugbar-widgets-editor-link"></a>'] = $count;
+            } else {
+                $data[$class] = $count;
+            }
+        }
+
+        return ['data' => $data, 'count' => $this->classCount, 'is_counter' => true];
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getWidgets()
+    {
+        $name = $this->getName();
+
+        return [
+            "$name" => [
+                'icon' => $this->icon,
+                'widget' => 'PhpDebugBar.Widgets.HtmlVariableListWidget',
+                'map' => "$name.data",
+                'default' => '{}'
+            ],
+            "$name:badge" => [
+                'map' => "$name.count",
+                'default' => 0
+            ]
+        ];
+    }
+}

src/DebugBar/Resources/widgets.css

@@ -146,6 +146,17 @@ dl.phpdebugbar-widgets-kvlist {
     cursor: pointer;
     min-height: 17px;
   }
+  .phpdebugbar-widgets-kvlist .phpdebugbar-widgets-editor-link {
+    margin-left: 8px;
+    color: #888;
+  }
+  .phpdebugbar-widgets-kvlist .phpdebugbar-widgets-editor-link:before {
+    content: "\f08e";
+    font-family: PhpDebugbarFontAwesome;
+    margin-left: 4px;
+    margin-right: 4px;
+    font-size: 12px;
+  }
 
 /* -------------------------------------- */