Configuration.hs

{-  
 *  Programmer:	Piotr Borek
 *  E-mail:     piotrborek@op.pl
 *  Copyright 2014 Piotr Borek
 *
 *  Distributed under the terms of the GPL (GNU Public License)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-}

module Mp.Configuration.Configuration (
    configDirFilePath,
    playlistDirFilePath,
    readConfiguration,
    getConfiguration,
    getMusicDirectory,
    getConfigurationColor,
    makeDefaultConfiguration
) where

import Control.Monad
import System.Environment
import System.Directory
import Data.Either.Utils
import Data.ConfigFile hiding (content)
import Graphics.Vty
import System.FilePath.Posix

import Mp.Utils.Utils
import Mp.Configuration.ConfigurationFile

configDir :: String
configDir  = ".config/mp"

configFile :: String
configFile = "mp.config"

configDirFilePath :: IO FilePath
configDirFilePath = do
    homeDir <- getEnv "HOME"
    return $ homeDir </> configDir

playlistDirFilePath :: IO FilePath
playlistDirFilePath = do
    cfg <- configDirFilePath
    return $ cfg </> "playlists"

readConfiguration :: IO ConfigParser
readConfiguration = do
    confDir <- configDirFilePath
    let file = confDir </> configFile
    conf <- readfile emptyCP file
    return $ forceEither conf

getConfiguration :: ConfigParser -> SectionSpec -> OptionSpec -> String
getConfiguration parser section option =
    forceEither $ get parser section option

getMusicDirectory :: ConfigParser -> String
getMusicDirectory conf = getConfiguration conf "general" "music_dir"

getConfigurationColor :: ConfigParser -> OptionSpec -> (Color, Style)
getConfigurationColor parser option  = toVtyColor $ getConfiguration parser "colors" option

makeDefaultConfiguration :: IO ()
makeDefaultConfiguration = do
    confDir <- configDirFilePath
    playlistDir <- playlistDirFilePath
    createDirectoryIfMissing True confDir
    createDirectoryIfMissing True playlistDir
    makeDefaultConfigurationFile confDir

makeDefaultConfigurationFile :: String -> IO ()
makeDefaultConfigurationFile confDir = do
    homeDir <- getEnv "HOME"
    exist <- doesFileExist file
    unless exist $ writeFile file $ defaultConfiguration homeDir
    where
        file = confDir </> configFile