users weekly stats as bar-chart in dashboard (#847)

src/Widget/WidgetRendererInterface.php

@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Widget;
+
+interface WidgetRendererInterface
+{
+    /**
+     * Checks if the given widget can be rendered.
+     *
+     * Most renderer check something like:
+     * return $widget instanceof MyWidgetType;
+     *
+     * @param WidgetInterface $widget
+     * @return bool
+     */
+    public function supports(WidgetInterface $widget): bool;
+
+    /**
+     * Renders the given widget.
+     *
+     * The given $options array overwrites the widgets internal options for this call.
+     *
+     * @param WidgetInterface $widget
+     * @param array $options
+     * @return string
+     */
+    public function render(WidgetInterface $widget, array $options = []): string;
+}