feat: add Time::toDatabase()

Author: kenjis

system/I18n/Time.php

@@ -1179,4 +1179,12 @@ public function __wakeup(): void
         $this->timezone = new DateTimeZone($timezone);
         parent::__construct($this->date, $this->timezone);
     }
+
+    /**
+     * Returns the datetime string ('Y-m-d H:i:s') that is safe to databases regardless of locale.
+     */
+    public function toDatabase(): string
+    {
+        return $this->format('Y-m-d H:i:s');
+    }
 }

tests/system/I18n/TimeTest.php

@@ -1128,4 +1128,17 @@ public function testSetTestNowWithFaLocale()
 
         Locale::setDefault($currentLocale);
     }
+
+    public function testToDatabase()
+    {
+        $currentLocale = Locale::getDefault();
+        Locale::setDefault('fa');
+
+        $time = Time::parse('2017-01-12 00:00', 'America/Chicago');
+
+        $this->assertSame('۲۰۱۷-۰۱-۱۲ ۰۰:۰۰:۰۰', (string) $time);
+        $this->assertSame('2017-01-12 00:00:00', $time->toDatabase());
+
+        Locale::setDefault($currentLocale);
+    }
 }