Add 3 new fields for tasks: start date, time estimated and time spent

app/Model/TimeTracking.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Model;
+
+/**
+ * Time tracking model
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class TimeTracking extends Base
+{
+    /**
+     * Calculate time metrics for a task
+     *
+     * Use subtasks time metrics if not empty otherwise return task time metrics
+     *
+     * @access public
+     * @param  array    $task        Task properties
+     * @param  array    $subtasks    Subtasks list
+     * @return array
+     */
+    public function getTaskTimesheet(array $task, array $subtasks)
+    {
+        $timesheet = array(
+            'time_spent' => 0,
+            'time_estimated' => 0,
+            'time_remaining' => 0,
+        );
+
+        foreach ($subtasks as &$subtask) {
+            $timesheet['time_estimated'] += $subtask['time_estimated'];
+            $timesheet['time_spent'] += $subtask['time_spent'];
+        }
+
+        if ($timesheet['time_estimated'] == 0 && $timesheet['time_spent'] == 0) {
+            $timesheet['time_estimated'] = $task['time_estimated'];
+            $timesheet['time_spent'] = $task['time_spent'];
+        }
+
+        $timesheet['time_remaining'] = $timesheet['time_estimated'] - $timesheet['time_spent'];
+
+        return $timesheet;
+    }
+}