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|
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TemplateHaskell #-}
--------------------------------------------------------------------------------
module Xanthous.Entities.Creature
( Creature(..)
, creatureType
, hitpoints
, newWithType
, damage
, isDead
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude
--------------------------------------------------------------------------------
import Test.QuickCheck.Arbitrary.Generic
import Data.Aeson.Generic.DerivingVia
import Data.Aeson (ToJSON, FromJSON)
--------------------------------------------------------------------------------
import Xanthous.Entities.RawTypes hiding (Creature, description)
import qualified Xanthous.Entities.RawTypes as Raw
import Xanthous.Entities (Draw(..), Entity(..), DrawRawChar(..))
--------------------------------------------------------------------------------
data Creature = Creature
{ _creatureType :: CreatureType
, _hitpoints :: Word
}
deriving stock (Eq, Show, Generic)
deriving Draw via DrawRawChar "_creatureType" Creature
deriving (ToJSON, FromJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
Creature
makeLenses ''Creature
instance Arbitrary Creature where
arbitrary = genericArbitrary
instance Entity Creature where
blocksVision _ = False
description = view $ creatureType . Raw.description
newWithType :: CreatureType -> Creature
newWithType _creatureType =
let _hitpoints = _creatureType ^. maxHitpoints
in Creature {..}
damage :: Word -> Creature -> Creature
damage amount = hitpoints %~ \hp ->
if hp <= amount
then 0
else hp - amount
isDead :: Creature -> Bool
isDead = views hitpoints (== 0)
|
