1 files changed, 112 insertions, 0 deletions
diff --git a/app/Analytic/AverageLeadCycleTimeAnalytic.php b/app/Analytic/AverageLeadCycleTimeAnalytic.php
new file mode 100644
index 00000000..96c803cc
--- /dev/null
+++ b/app/Analytic/AverageLeadCycleTimeAnalytic.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace Kanboard\Analytic;
+
+use Kanboard\Core\Base;
+use Kanboard\Model\Task;
+
+/**
+ * Average Lead and Cycle Time
+ *
+ * @package  analytic
+ * @author   Frederic Guillot
+ */
+class AverageLeadCycleTimeAnalytic extends Base
+{
+    /**
+     * Build report
+     *
+     * @access public
+     * @param  integer   $project_id    Project id
+     * @return array
+     */
+    public function build($project_id)
+    {
+        $stats = array(
+            'count' => 0,
+            'total_lead_time' => 0,
+            'total_cycle_time' => 0,
+            'avg_lead_time' => 0,
+            'avg_cycle_time' => 0,
+        );
+
+        foreach ($this->getTasks($project_id) as &$task) {
+            $stats['count']++;
+            $stats['total_lead_time'] += $this->calculateLeadTime($task);
+            $stats['total_cycle_time'] += $this->calculateCycleTime($task);
+        }
+
+        $stats['avg_lead_time'] = $this->calculateAverage($stats, 'total_lead_time');
+        $stats['avg_cycle_time'] = $this->calculateAverage($stats, 'total_cycle_time');
+
+        return $stats;
+    }
+
+    /**
+     * Calculate average
+     *
+     * @access private
+     * @param  array  &$stats
+     * @param  string $field
+     * @return float
+     */
+    private function calculateAverage(array &$stats, $field)
+    {
+        if ($stats['count'] > 0) {
+            return (int) ($stats[$field] / $stats['count']);
+        }
+
+        return 0;
+    }
+
+    /**
+     * Calculate lead time
+     *
+     * @access private
+     * @param  array  &$task
+     * @return integer
+     */
+    private function calculateLeadTime(array &$task)
+    {
+        $end = $task['date_completed'] ?: time();
+        $start = $task['date_creation'];
+
+        return $end - $start;
+    }
+
+    /**
+     * Calculate cycle time
+     *
+     * @access private
+     * @param  array  &$task
+     * @return integer
+     */
+    private function calculateCycleTime(array &$task)
+    {
+        if (empty($task['date_started'])) {
+            return 0;
+        }
+
+        $end = $task['date_completed'] ?: time();
+        $start = $task['date_started'];
+
+        return $end - $start;
+    }
+
+    /**
+     * Get the 1000 last created tasks
+     *
+     * @access private
+     * @return array
+     */
+    private function getTasks($project_id)
+    {
+        return $this->db
+            ->table(Task::TABLE)
+            ->columns('date_completed', 'date_creation', 'date_started')
+            ->eq('project_id', $project_id)
+            ->desc('id')
+            ->limit(1000)
+            ->findAll();
+    }
+}