Automatically update the start date when a task move away from a column

app/Action/TaskUpdateStartDateOnMoveColumn.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace Kanboard\Action;
+
+use Kanboard\Model\TaskModel;
+
+/**
+ * Set the start date when task move away from certain column
+ *
+ * @package Kanboard\Action
+ */
+class TaskUpdateStartDateOnMoveColumn extends Base
+{
+    /**
+     * Get automatic action description
+     *
+     * @access public
+     * @return string
+     */
+    public function getDescription()
+    {
+        return t('Automatically update the start date when task move away from certain column');
+    }
+
+    /**
+     * Get the list of compatible events
+     *
+     * @access public
+     * @return array
+     */
+    public function getCompatibleEvents()
+    {
+        return array(
+            TaskModel::EVENT_MOVE_COLUMN,
+        );
+    }
+
+    /**
+     * Get the required parameter for the action (defined by the user)
+     *
+     * @access public
+     * @return array
+     */
+    public function getActionRequiredParameters()
+    {
+        return array(
+            'column_id' => t('Column'),
+        );
+    }
+
+    /**
+     * Get the required parameter for the event
+     *
+     * @access public
+     * @return string[]
+     */
+    public function getEventRequiredParameters()
+    {
+        return array(
+            'task_id',
+            'task' => array(
+                'project_id',
+                'column_id',
+            ),
+        );
+    }
+
+    /**
+     * Execute the action (set the task date_started)
+     *
+     * @access public
+     * @param  array   $data   Event data dictionary
+     * @return bool            True if the action was executed or false when not executed
+     */
+    public function doAction(array $data)
+    {
+        $values = array(
+            'id' => $data['task_id'],
+            'date_started' => time(),
+        );
+
+        return $this->taskModificationModel->update($values, false);
+    }
+
+    /**
+     * Check if the event data meet the action condition
+     *
+     * @access public
+     * @param  array   $data   Event data dictionary
+     * @return bool
+     */
+    public function hasRequiredCondition(array $data)
+    {
+        return empty($data['task']['date_started']) && $data['task']['column_id'] != $this->getParam('column_id');
+    }
+}