Split Task model into smaller classes

app/Model/DateParser.php

@@ -0,0 +1,85 @@
+<?php
+
+namespace Model;
+
+use DateTime;
+
+/**
+ * Date parser model
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class DateParser extends Base
+{
+    /**
+     * Return a timestamp if the given date format is correct otherwise return 0
+     *
+     * @access public
+     * @param  string   $value  Date to parse
+     * @param  string   $format Date format
+     * @return integer
+     */
+    public function getValidDate($value, $format)
+    {
+        $date = DateTime::createFromFormat($format, $value);
+
+        if ($date !== false) {
+            $errors = DateTime::getLastErrors();
+            if ($errors['error_count'] === 0 && $errors['warning_count'] === 0) {
+                $timestamp = $date->getTimestamp();
+                return $timestamp > 0 ? $timestamp : 0;
+            }
+        }
+
+        return 0;
+    }
+
+    /**
+     * Parse a date ad return a unix timestamp, try different date formats
+     *
+     * @access public
+     * @param  string   $value   Date to parse
+     * @return integer
+     */
+    public function getTimestamp($value)
+    {
+        foreach ($this->getDateFormats() as $format) {
+
+            $timestamp = $this->getValidDate($value, $format);
+
+            if ($timestamp !== 0) {
+                return $timestamp;
+            }
+        }
+
+        return 0;
+    }
+
+    /**
+     * Return the list of supported date formats
+     *
+     * @access public
+     * @return array
+     */
+    public function getDateFormats()
+    {
+        return array(
+            t('m/d/Y'),
+            'Y-m-d',
+            'Y_m_d',
+        );
+    }
+
+    /**
+     * For a given timestamp, reset the date to midnight
+     *
+     * @access public
+     * @param  integer    $timestamp    Timestamp
+     * @return integer
+     */
+    public function resetDateToMidnight($timestamp)
+    {
+        return mktime(0, 0, 0, date('m', $timestamp), date('d', $timestamp), date('Y', $timestamp));
+    }
+}