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{-# LANGUAGE CPP #-}
-- | Module holding localized error messages to be presented as a response.
--
-- To localize error messages provided by HURL, provide your translations between
-- "BEGIN LOCALIZATION" & "END LOCALIZATION" in this file.
--
-- The lines are formatted:
--    trans ("LANG":_) (KEY) = "TRANSLATION"
-- with uppercase indicating the bits you fill in.
--
-- Translations between #if WITH_HTTP_URI & #endif are specific to HTTP error handling.
module Network.URI.Messages (trans, Errors(..)) where

import Data.List (stripPrefix)
import Data.Maybe (fromMaybe)

#if WITH_HTTP_URI
import Network.HTTP.Client (HttpException(..), HttpExceptionContent(..))
import Control.Exception (displayException)
#endif

trans _ (RawXML markup) = markup
--- BEGIN LOCALIZATION
trans ("en":_) (UnsupportedScheme scheme) = "Unsupported protocol " ++ scheme
trans ("en":_) (UnsupportedMIME mime) = "Unsupported filetype " ++ mime
trans ("en":_) (RequiresInstall mime appsMarkup) =
    "<h1>Please install a compatible app to open <code>" ++ linkType ++ "</code> links</h1>\n" ++ appsMarkup
  where linkType = fromMaybe mime $ stripPrefix "x-scheme-handler/" mime
trans ("en":_) (OpenedWith app) = "Opened in " ++ app
trans ("en":_) (ReadFailed msg) = "Failed to read file: " ++ msg
trans ("en":_) MalformedResponse = "Invalid response!"
#if WITH_HTTP_URI
trans ("en":_) (Http (InvalidUrlException url msg)) = "Invalid URL " ++ url ++ ": " ++ msg
trans ("en":_) (Http (HttpExceptionRequest _ (TooManyRedirects _))) = "Too many redirects!"
trans ("en":_) (Http (HttpExceptionRequest _ ResponseTimeout)) = "The site took too long to respond!"
trans ("en":_) (Http (HttpExceptionRequest _ ConnectionTimeout)) = "The site took too long to connect!"
trans ("en":_) (Http (HttpExceptionRequest _ (ConnectionFailure err))) = "Could not connect: " ++ displayException err
trans ("en":_) (Http (HttpExceptionRequest _ _)) = "The site doesn't appear to speak the same language as me!"
#endif
--- END LOCALIZATION

trans (_:locales) err = trans locales err
trans [] err = trans ["en"] err

data Errors = UnsupportedScheme String | UnsupportedMIME String | RequiresInstall String String
    | OpenedWith String | ReadFailed String | RawXML String | MalformedResponse
#if WITH_HTTP_URI
    | Http HttpException
#endif