Improve notification classes and move interface to core

app/Notification/WebNotification.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Kanboard\Notification;
+
+use Kanboard\Core\Base;
+use Kanboard\Core\Notification\NotificationInterface;
+
+/**
+ * Web Notification
+ *
+ * @package  Kanboard\Notification
+ * @author   Frederic Guillot
+ */
+class WebNotification extends Base implements NotificationInterface
+{
+    /**
+     * Notification type
+     *
+     * @var string
+     */
+    const TYPE = 'web';
+
+    /**
+     * Send notification to a user
+     *
+     * @access public
+     * @param  array     $user
+     * @param  string    $event_name
+     * @param  array     $event_data
+     */
+    public function notifyUser(array $user, $event_name, array $event_data)
+    {
+        $this->userUnreadNotification->create($user['id'], $event_name, $event_data);
+    }
+
+    /**
+     * Send notification to a project
+     *
+     * @access public
+     * @param  array     $project
+     * @param  string    $event_name
+     * @param  array     $event_data
+     */
+    public function notifyProject(array $project, $event_name, array $event_data)
+    {
+    }
+}