about summary refs log tree commit diff
path: root/src/Xanthous/Data.hs
blob: afba273005f83929660a42a503de603aef3cd0ba (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE DeriveFoldable #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE TemplateHaskell #-}
--------------------------------------------------------------------------------
-- | Common data types for Xanthous
--------------------------------------------------------------------------------
module Xanthous.Data
  ( Position(..)
  , x
  , y

  , Positioned(..)
  , _Positioned
  , position
  , positioned
  , loc
  , _Position
  , positionFromPair

    -- *
  , Dimensions'(..)
  , Dimensions
  , HasWidth(..)
  , HasHeight(..)

    -- *
  , Direction(..)
  , opposite
  , move
  , asPosition

    -- *
  , Neighbors(..)
  , edges
  , neighborDirections
  , neighborPositions
  ) where
--------------------------------------------------------------------------------
import           Xanthous.Prelude hiding (Left, Down, Right)
import           Test.QuickCheck (Arbitrary, CoArbitrary, Function)
import           Test.QuickCheck.Arbitrary.Generic
import           Data.Group
import           Brick (Location(Location), Edges(..))
--------------------------------------------------------------------------------
import           Xanthous.Util (EqEqProp(..), EqProp)
import           Xanthous.Orphans ()
--------------------------------------------------------------------------------

data Position where
  Position :: { _x :: Int
             , _y :: Int
             } -> Position
  deriving stock (Show, Eq, Generic, Ord)
  deriving anyclass (Hashable, CoArbitrary, Function)
  deriving EqProp via EqEqProp Position
makeLenses ''Position

instance Arbitrary Position where
  arbitrary = genericArbitrary
  shrink = genericShrink

instance Semigroup Position where
  (Position x₁ y₁) <> (Position x₂ y₂) = Position (x₁ + x₂) (y₁ + y₂)

instance Monoid Position where
  mempty = Position 0 0

instance Group Position where
  invert (Position px py) = Position (-px) (-py)

data Positioned a where
  Positioned :: Position -> a -> Positioned a
  deriving stock (Show, Eq, Ord, Functor, Foldable, Traversable, Generic)
  deriving anyclass (CoArbitrary, Function)

_Positioned :: Iso (Position, a) (Position, b) (Positioned a) (Positioned b)
_Positioned = iso hither yon
  where
    hither (pos, a) = Positioned pos a
    yon (Positioned pos b) = (pos, b)

instance Arbitrary a => Arbitrary (Positioned a) where
  arbitrary = Positioned <$> arbitrary <*> arbitrary

position :: Lens' (Positioned a) Position
position = lens
  (\(Positioned pos _) -> pos)
  (\(Positioned _ a) pos -> Positioned pos a)

positioned :: Lens (Positioned a) (Positioned b) a b
positioned = lens
  (\(Positioned _ x') -> x')
  (\(Positioned pos _) x' -> Positioned pos x')

loc :: Iso' Position Location
loc = iso hither yon
  where
    hither (Position px py) = Location (px, py)
    yon (Location (lx, ly)) = Position lx ly

_Position :: Iso' Position (Int, Int)
_Position = iso hither yon
  where
    hither (Position px py) = (px, py)
    yon (lx, ly) = Position lx ly

positionFromPair :: (Integral i, Integral j) => (i, j) -> Position
positionFromPair (i, j) = Position (fromIntegral i) (fromIntegral j)

--------------------------------------------------------------------------------

data Dimensions' a = Dimensions
  { _width :: a
  , _height :: a
  }
  deriving stock (Show, Eq, Functor, Generic)
  deriving anyclass (CoArbitrary, Function)
makeFieldsNoPrefix ''Dimensions'

instance Arbitrary a => Arbitrary (Dimensions' a) where
  arbitrary = Dimensions <$> arbitrary <*> arbitrary

type Dimensions = Dimensions' Word

--------------------------------------------------------------------------------

data Direction where
  Up        :: Direction
  Down      :: Direction
  Left      :: Direction
  Right     :: Direction
  UpLeft    :: Direction
  UpRight   :: Direction
  DownLeft  :: Direction
  DownRight :: Direction
  Here      :: Direction
  deriving stock (Show, Eq, Generic)

instance Arbitrary Direction where
  arbitrary = genericArbitrary
  shrink = genericShrink

opposite :: Direction -> Direction
opposite Up        = Down
opposite Down      = Up
opposite Left      = Right
opposite Right     = Left
opposite UpLeft    = DownRight
opposite UpRight   = DownLeft
opposite DownLeft  = UpRight
opposite DownRight = UpLeft
opposite Here      = Here

move :: Direction -> Position -> Position
move Up        = y -~ 1
move Down      = y +~ 1
move Left      = x -~ 1
move Right     = x +~ 1
move UpLeft    = move Up . move Left
move UpRight   = move Up . move Right
move DownLeft  = move Down . move Left
move DownRight = move Down . move Right
move Here      = id

asPosition :: Direction -> Position
asPosition dir = move dir mempty

--------------------------------------------------------------------------------

data Neighbors a = Neighbors
  { _topLeft
  , _top
  , _topRight
  , _left
  , _right
  , _bottomLeft
  , _bottom
  , _bottomRight :: a
  }
  deriving stock (Show, Eq, Ord, Functor, Foldable, Traversable, Generic)
  deriving anyclass (NFData)
makeLenses ''Neighbors

instance Applicative Neighbors where
  pure α = Neighbors
    { _topLeft     = α
    , _top         = α
    , _topRight    = α
    , _left        = α
    , _right       = α
    , _bottomLeft  = α
    , _bottom      = α
    , _bottomRight = α
    }
  nf <*> nx = Neighbors
    { _topLeft     = nf ^. topLeft     $ nx ^. topLeft
    , _top         = nf ^. top         $ nx ^. top
    , _topRight    = nf ^. topRight    $ nx ^. topRight
    , _left        = nf ^. left        $ nx ^. left
    , _right       = nf ^. right       $ nx ^. right
    , _bottomLeft  = nf ^. bottomLeft  $ nx ^. bottomLeft
    , _bottom      = nf ^. bottom      $ nx ^. bottom
    , _bottomRight = nf ^. bottomRight $ nx ^. bottomRight
    }

edges :: Neighbors a -> Edges a
edges neighs = Edges
  { eTop = neighs ^. top
  , eBottom = neighs ^. bottom
  , eLeft = neighs ^. left
  , eRight = neighs ^. right
  }

neighborDirections :: Neighbors Direction
neighborDirections = Neighbors
  { _topLeft     = UpLeft
  , _top         = Up
  , _topRight    = UpRight
  , _left        = Left
  , _right       = Right
  , _bottomLeft  = DownLeft
  , _bottom      = Down
  , _bottomRight = DownRight
  }

neighborPositions :: Position -> Neighbors Position
neighborPositions pos = (`move` pos) <$> neighborDirections