record single task states transition and add them in timeline

Event/TaskEvent.php

@@ -0,0 +1,55 @@
+<?php
+/*
+ * Copyright (C) 2018 Champs Libres Cooperative <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+namespace Chill\TaskBundle\Event;
+
+use Chill\TaskBundle\Entity\AbstractTask;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * 
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class TaskEvent extends Event
+{
+    const PERSIST = 'chill_task.task_persist';
+    
+    /**
+     *
+     * @var AbstractTask
+     */
+    protected $task;
+    
+    public function __construct(AbstractTask $task)
+    {
+        $this->task = $task;
+    }
+    
+    public function getTask(): AbstractTask
+    {
+        return $this->task;
+    }
+
+    public function setTask(AbstractTask $task)
+    {
+        $this->task = $task;
+        
+        return $this;
+    }
+}
+