X-Git-Url: http://gitweb.michael.orlitzky.com/?p=dead%2Fhalcyon.git;a=blobdiff_plain;f=src%2FOptionalConfiguration.hs;h=77b3a06d2c42bef78908bdc09827cad73e91988d;hp=3018e9ecdae56bc913b319a843804b0ef2f810b8;hb=dd4abc21674b98bc55a3775291a8667dffec2863;hpb=90c763c607d9eceb718b2229bb420134c9931544 diff --git a/src/OptionalConfiguration.hs b/src/OptionalConfiguration.hs index 3018e9e..77b3a06 100644 --- a/src/OptionalConfiguration.hs +++ b/src/OptionalConfiguration.hs @@ -16,12 +16,15 @@ module OptionalConfiguration ( where import qualified Data.Configurator as DC -import qualified Data.Configurator.Types as DCT + import Data.Data (Data) import Data.Maybe (fromMaybe) import Data.Monoid (Monoid(..)) import Data.Typeable (Typeable) +import Usernames + + -- | The same as Cfg, except everything is optional. It's easy to -- merge two of these by simply dropping the Nothings in favor of -- the Justs. The 'usernames' are left un-maybed so that cmdargs @@ -39,7 +42,7 @@ data OptionalCfg = from_address :: Maybe String, to_address :: Maybe String, verbose :: Maybe Bool, - usernames :: [String] } + usernames :: Usernames } deriving (Show, Data, Typeable) instance Monoid OptionalCfg where @@ -55,7 +58,7 @@ instance Monoid OptionalCfg where Nothing Nothing Nothing - [] + (Usernames []) cfg1 `mappend` cfg2 = OptionalCfg @@ -79,18 +82,10 @@ instance Monoid OptionalCfg where merge (Just _) (Just y) = Just y -- Use only the latter usernames if there are any. - all_usernames = if (null (usernames cfg2)) - then (usernames cfg1) - else (usernames cfg2) - -instance DCT.Configured [String] where - convert (DCT.List xs) = - mapM convert_string xs - where - convert_string :: DCT.Value -> Maybe String - convert_string = DCT.convert - - convert _ = Nothing + all_usernames = + usernames $ if (null (get_usernames (usernames cfg2))) + then cfg1 + else cfg2 from_rc :: IO OptionalCfg from_rc = do @@ -120,4 +115,4 @@ from_rc = do cfg_from_address cfg_to_address cfg_verbose - (fromMaybe [] cfg_usernames) + (fromMaybe (Usernames []) cfg_usernames)