Use class based filter.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	app/filters.php
Merge branch '2.2'

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	app/filters.php