{-# LANGUAGE QuasiQuotes #-}

module Hack.Contrib.Response where

import Hack
import Hack.Contrib.Utils
import Hack.Contrib.Constants

import MPSUTF8
import Prelude hiding ((.), (^), (>), (+))

import Data.Maybe


redirect :: String -> Maybe Int -> Response -> Response
redirect target code = 
    set_status (code.fromMaybe 302)
  > set_header _Location target

finish :: Response -> Response
finish r 
  | r.status.belongs_to [204, 304]
      = r .delete_header _ContentType
          .set_body ""
  | otherwise = r
        

header :: String -> Response -> Maybe String
header s r = r.headers.get s

has_header :: String -> Response -> Bool
has_header s r = r.header s .isJust

set_header :: String -> String -> Response -> Response
set_header k v r = r { headers = r.headers.put k v }

delete_header :: String -> Response -> Response
delete_header k r = r { headers = r.headers.reject (fst > is k) }
  
set_content_type :: String -> Response -> Response
set_content_type s r = r.set_header _ContentType s

set_content_length :: Int -> Response -> Response
set_content_length i r = r.set_header _ContentLength (i.show)

set_body :: String -> Response -> Response
set_body s r = r { body = s }

set_status :: Int -> Response -> Response
set_status i r = r { status = i }

set_last_modified :: String -> Response -> Response
set_last_modified s r = r.set_header _LastModified s