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|
{- git-annex trust levels
-
- Copyright 2010 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE FlexibleInstances #-}
module Types.TrustLevel (
TrustLevel(..),
TrustMap,
readTrustLevel,
showTrustLevel,
prop_read_show_TrustLevel
) where
import qualified Data.Map as M
import Data.Default
import Data.Ord
import Types.UUID
data TrustLevel = DeadTrusted | UnTrusted | SemiTrusted | Trusted
deriving (Eq, Enum, Ord, Bounded, Show)
instance Default TrustLevel where
def = SemiTrusted
instance Default (Down TrustLevel) where
def = Down def
type TrustMap = M.Map UUID TrustLevel
readTrustLevel :: String -> Maybe TrustLevel
readTrustLevel "trusted" = Just Trusted
readTrustLevel "untrusted" = Just UnTrusted
readTrustLevel "semitrusted" = Just SemiTrusted
readTrustLevel "dead" = Just DeadTrusted
readTrustLevel _ = Nothing
showTrustLevel :: TrustLevel -> String
showTrustLevel Trusted = "trusted"
showTrustLevel UnTrusted = "untrusted"
showTrustLevel SemiTrusted = "semitrusted"
showTrustLevel DeadTrusted = "dead"
prop_read_show_TrustLevel :: Bool
prop_read_show_TrustLevel = all check [minBound .. maxBound]
where
check l = readTrustLevel (showTrustLevel l) == Just l
|
