Move analytic logic to separate classes

app/Analytic/TaskDistributionAnalytic.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Kanboard\Analytic;
+
+use Kanboard\Core\Base;
+
+/**
+ * Task Distribution
+ *
+ * @package  analytic
+ * @author   Frederic Guillot
+ */
+class TaskDistributionAnalytic extends Base
+{
+    /**
+     * Build report
+     *
+     * @access public
+     * @param  integer   $project_id    Project id
+     * @return array
+     */
+    public function build($project_id)
+    {
+        $metrics = array();
+        $total = 0;
+        $columns = $this->board->getColumns($project_id);
+
+        foreach ($columns as $column) {
+            $nb_tasks = $this->taskFinder->countByColumnId($project_id, $column['id']);
+            $total += $nb_tasks;
+
+            $metrics[] = array(
+                'column_title' => $column['title'],
+                'nb_tasks' => $nb_tasks,
+            );
+        }
+
+        if ($total === 0) {
+            return array();
+        }
+
+        foreach ($metrics as &$metric) {
+            $metric['percentage'] = round(($metric['nb_tasks'] * 100) / $total, 2);
+        }
+
+        return $metrics;
+    }
+}