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module Daffm.Configuration where
import Control.Applicative ((<|>))
import Control.Arrow (ArrowChoice (left))
import Control.Exception (throwIO)
import qualified Control.Exception as IO
import Daffm.Action.Commands (parseCommand)
import Daffm.Keymap (parseKeySequence)
import Daffm.Types
import Data.Bifunctor (Bifunctor (first))
import qualified Data.Map as Map
import Data.Maybe (fromMaybe)
import qualified Data.Text as Text
import qualified Data.Text.IO as Text
import System.Directory (XdgDirectory (XdgConfig), getXdgDirectory)
import System.FilePath (joinPath)
import Toml ((.=))
import qualified Toml
getConfigDir :: IO FilePath
getConfigDir = getXdgDirectory XdgConfig "daffm"
getDefaultConfigFilePath :: String -> IO FilePath
getDefaultConfigFilePath "" = do
dir <- getConfigDir
pure $ joinPath [dir, "config.toml"]
getDefaultConfigFilePath name = do
dir <- getConfigDir
pure $ joinPath [dir, "config." <> name <> ".toml"]
resolveConfigPath :: Maybe String -> IO FilePath
resolveConfigPath Nothing = getDefaultConfigFilePath ""
resolveConfigPath (Just ('@' : name)) = getDefaultConfigFilePath name
resolveConfigPath (Just path) = pure path
loadConfigFile :: Maybe String -> IO Configuration
loadConfigFile pathM = do
resolveConfigPath pathM >>= (IO.try . Text.readFile) >>= foobar
where
foobar :: Either IOError Text.Text -> IO Configuration
foobar rawE = case rawE of
Left _ -> pure defaultConfiguration
Right txt -> parse txt
parse txt = case parseConfig txt of
Left e -> throwIO $ userError $ show e
Right c -> pure c
parseConfig :: Text.Text -> Either Text.Text Configuration
parseConfig = left Toml.prettyTomlDecodeErrors . Toml.decode configurationCodec
configurationCodec :: Toml.TomlCodec Configuration
configurationCodec =
Configuration
<$> (keymapCodec "keymap" .= configKeymap)
<*> (openerCodec "opener" .= configOpener)
<*> pure Map.empty .= configTheme
where
openerCodec = Toml.dioptional . Toml.text
keymapCodec :: Toml.Key -> Toml.TomlCodec Keymap
keymapCodec = Toml.dimap (const Map.empty) toKeymap . keymapRawCodec
where
keymapRawCodec = Toml.tableMap Toml._KeyText commandCodec
toKeymap = Map.fromList . map (first toKeys) . Map.toList
toKeys = fromMaybe [] . parseKeySequence . stripQuotes
toCmd = fromMaybe CmdNoop . parseCommand
stripQuotes txt = fromMaybe txt (Text.stripPrefix "\"" txt >>= Text.stripSuffix "\"")
commandCodec k = cmdCodec k <|> cmdChainCodec k
cmdCodec = Toml.dimap (const "") toCmd . Toml.text
cmdChainCodec = Toml.dimap (const []) (CmdChain . map toCmd) . Toml.arrayOf Toml._Text
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