FALLBACK_EXT = 'BIN'
EXT_REGEX = /\.([\w]+)$/i
angular
  .module 'EssayApp.filters'
  .filter 'extention', ->
    (name) ->
      return FALLBACK_EXT unless name?.length > 0
      EXT_REGEX.exec(name)?[1]?.toUpperCase?() or FALLBACK_EXT