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{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE RecordWildCards #-}
--------------------------------------------------------------------------------
module Xanthous.Data.Entities
( -- * Collisions
Collision(..)
, _Stop
, _Combat
-- * Entity Attributes
, EntityAttributes(..)
, blocksVision
, blocksObject
, collision
, defaultEntityAttributes
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude
--------------------------------------------------------------------------------
import Data.Aeson (ToJSON(..), FromJSON(..), (.:?), (.!=), withObject)
import Data.Aeson.Generic.DerivingVia
import Xanthous.Util.QuickCheck (GenericArbitrary(..))
import Test.QuickCheck
--------------------------------------------------------------------------------
data Collision
= Stop -- ^ Can't move through this
| Combat -- ^ Moving into this equates to hitting it with a stick
deriving stock (Show, Eq, Ord, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving Arbitrary via GenericArbitrary Collision
deriving (ToJSON, FromJSON)
via WithOptions '[ AllNullaryToStringTag 'True ]
Collision
makePrisms ''Collision
-- | Attributes of an entity
data EntityAttributes = EntityAttributes
{ _blocksVision :: Bool
-- | Does this entity block a large object from being put in the same tile as
-- it - eg a a door being closed on it
, _blocksObject :: Bool
-- | What type of collision happens when moving into this entity?
, _collision :: Collision
}
deriving stock (Show, Eq, Ord, Generic)
deriving anyclass (NFData, CoArbitrary, Function)
deriving Arbitrary via GenericArbitrary EntityAttributes
deriving (ToJSON)
via WithOptions '[ FieldLabelModifier '[Drop 1] ]
EntityAttributes
makeLenses ''EntityAttributes
instance FromJSON EntityAttributes where
parseJSON = withObject "EntityAttributes" $ \o -> do
_blocksVision <- o .:? "blocksVision"
.!= _blocksVision defaultEntityAttributes
_blocksObject <- o .:? "blocksObject"
.!= _blocksObject defaultEntityAttributes
_collision <- o .:? "collision"
.!= _collision defaultEntityAttributes
pure EntityAttributes {..}
defaultEntityAttributes :: EntityAttributes
defaultEntityAttributes = EntityAttributes
{ _blocksVision = False
, _blocksObject = False
, _collision = Stop
}
|
