- BC Break: _PHP_ namespaces changed (PSR-4 standard). The _root_ namespace for all _PF_ related scripts is Exodus4D\Pathfinder

- BC Break: Project folder structure changed. Removed `app/main` dir.
- BC Break: Core _PHP_ framework + dependencies moved into `composer.json` and are no longer part of this repo

app/Cron/StatisticsUpdate.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Exodus
+ * Date: 16.10.2016
+ * Time: 21:31
+ */
+
+namespace Exodus4D\Pathfinder\Cron;
+
+class StatisticsUpdate extends AbstractCron {
+
+    /**
+     * log text
+     */
+    const LOG_TEXT_STATISTICS = ', %5s rows deleted';
+
+    /**
+     * delete old statistics
+     * -> older than 1 year
+     * >> php index.php "/cron/deleteStatisticsData"
+     * @param \Base $f3
+     */
+    function deleteStatisticsData(\Base $f3){
+        $this->logStart(__FUNCTION__);
+
+        $currentYear = (int)date('o');
+        $currentWeek = (int)date('W');
+        $expiredYear = $currentYear - 1;
+
+        $pfDB = $f3->DB->getDB('PF');
+
+        $queryData = [
+            'yearWeekEnd' => strval($expiredYear) . str_pad($currentWeek, 2, 0, STR_PAD_LEFT)
+        ];
+
+        $sql = "DELETE FROM
+                   activity_log
+                WHERE
+                  CONCAT(`year`, `week`) < :yearWeekEnd";
+
+        $pfDB->exec($sql, $queryData);
+
+        $deletedLogsCount = $pfDB->count();
+
+        // Log --------------------------------------------------------------------------------------------------------
+        $total = $count = $importCount = $deletedLogsCount;
+
+        $text = sprintf(self::LOG_TEXT_STATISTICS, $deletedLogsCount);
+        $this->logEnd(__FUNCTION__, $total, $count, $importCount, 0, $text);
+    }
+}