Add TimeSince view helper

refs #4301

application/views/helpers/TimeSince.php

@@ -0,0 +1,36 @@
+<?php
+
+class Zend_View_Helper_TimeSince extends Zend_View_Helper_Abstract
+{
+    public function timeSince($timestamp)
+    {
+        if (! $timestamp) return '-';
+        $duration = time() - $timestamp;
+        $prefix = '';
+        if ($duration < 0) {
+            $prefix = '-';
+            $duration *= -1;
+        }
+        if ($duration > 3600 * 24 * 3) {
+            if (date('Y') === date('Y', $timestamp)) {
+                return date('d.m.', $timestamp);
+            }
+            return date('m.Y', $timestamp);
+        }
+        return $prefix . $this->showHourMin($duration);
+    }
+
+    public static function showHourMin($sec)
+    {
+        $min = floor($sec / 60);
+        if ($min < 60) {
+            return $min . 'm ' . ($sec % 60) . 's';
+        }
+        $hour = floor($min / 60);
+        if ($hour < 24) {
+            return date('H:i', time() - $sec);
+        }
+        return floor($hour / 24) . 'd ' . ($hour % 24) . 'h';
+    }
+}
+