diohsc-0.1.9: Request.hs

-- This file is part of Diohsc
-- Copyright (C) 2020 Martin Bays <mbays@sdf.org>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of version 3 of the GNU General Public License as
-- published by the Free Software Foundation, or any later version.
--
-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see http://www.gnu.org/licenses/.

{-# LANGUAGE Safe #-}

module Request where

import           Data.List  (elemIndices)
import           Data.Maybe (fromMaybe)
import           Safe       (lastMay, readMay)

import           URI        (URI, escapePathString, nullUri, parseAbsoluteUri)

data Host = Host {hostName :: String, hostPort :: Int}
    deriving (Eq,Ord,Show)

showHost :: Host -> String
showHost (Host name port) = name ++ ":" ++ show port

parseHost :: String -> Maybe Host
parseHost s = do
    i <- lastMay $ elemIndices ':' s
    (hostname, ':':portStr) <- return $ splitAt i s
    Host hostname <$> readMay portStr


data Request
    = NetworkRequest {requestHost :: Host, networkRequestUri :: URI}
    | LocalFileRequest {requestPath :: FilePath}
    deriving (Eq,Ord,Show)

requestUri :: Request -> URI
requestUri (NetworkRequest _ uri) = uri
requestUri (LocalFileRequest abspath) =
    fromMaybe nullUri . parseAbsoluteUri $ "file://" <> escapePathString abspath