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|
{-# LANGUAGE TemplateHaskell #-}
module Xanthous.Messages
( Message(..)
, resolve
, MessageMap(..)
, lookupMessage
-- * Game messages
, messages
, message
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude
import Control.Monad.Random.Class (MonadRandom)
import Data.Aeson (FromJSON, ToJSON, toJSON)
import Data.Aeson.Generic.DerivingVia
import Data.FileEmbed
import Data.List.NonEmpty
import Test.QuickCheck hiding (choose)
import Test.QuickCheck.Arbitrary.Generic
import Test.QuickCheck.Instances.UnorderedContainers ()
import Text.Mustache
import qualified Data.Yaml as Yaml
import Xanthous.Random
import Xanthous.Orphans ()
data Message = Single Template | Choice (NonEmpty Template)
deriving stock (Show, Eq, Ord, Generic)
deriving anyclass (CoArbitrary, Function, NFData)
deriving (ToJSON, FromJSON)
via WithOptions '[ SumEnc UntaggedVal ]
Message
instance Arbitrary Message where
arbitrary = genericArbitrary
shrink = genericShrink
resolve :: MonadRandom m => Message -> m Template
resolve (Single t) = pure t
resolve (Choice ts) = choose ts
data MessageMap = Direct Message | Nested (HashMap Text MessageMap)
deriving stock (Show, Eq, Ord, Generic)
deriving anyclass (CoArbitrary, Function, NFData)
deriving (ToJSON, FromJSON)
via WithOptions '[ SumEnc UntaggedVal ]
MessageMap
instance Arbitrary MessageMap where
arbitrary = frequency [ (10, Direct <$> arbitrary)
, (1, Nested <$> arbitrary)
]
lookupMessage :: [Text] -> MessageMap -> Maybe Message
lookupMessage [] (Direct msg) = Just msg
lookupMessage (k:ks) (Nested m) = lookupMessage ks =<< m ^. at k
lookupMessage _ _ = Nothing
type instance Index MessageMap = [Text]
type instance IxValue MessageMap = Message
instance Ixed MessageMap where
ix [] f (Direct msg) = Direct <$> f msg
ix (k:ks) f (Nested m) = case m ^. at k of
Just m' -> ix ks f m' <&> \m'' ->
Nested $ m & at k ?~ m''
Nothing -> pure $ Nested m
ix _ _ m = pure m
--------------------------------------------------------------------------------
rawMessages :: ByteString
rawMessages = $(embedFile "src/Xanthous/messages.yaml")
messages :: MessageMap
messages
= either (error . Yaml.prettyPrintParseException) id
$ Yaml.decodeEither' rawMessages
message :: (MonadRandom m, ToJSON params) => [Text] -> params -> m Text
message path params = maybe notFound renderMessage $ messages ^? ix path
where
renderMessage msg = do
tpl <- resolve msg
pure . toStrict . renderMustache tpl $ toJSON params
notFound = pure "Message not found"
|
