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|
module Struct.Direction exposing (Type(..), opposite_of, to_string, decoder)
-- Elm -------------------------------------------------------------------------
import Json.Decode
-- Battlemap -------------------------------------------------------------------
--------------------------------------------------------------------------------
-- TYPES -----------------------------------------------------------------------
--------------------------------------------------------------------------------
type Type =
None
| Left
| Right
| Up
| Down
--------------------------------------------------------------------------------
-- LOCAL -----------------------------------------------------------------------
--------------------------------------------------------------------------------
from_string : String -> Type
from_string str =
case str of
"R" -> Right
"L" -> Left
"U" -> Up
"D" -> Down
_ -> None
--------------------------------------------------------------------------------
-- EXPORTED --------------------------------------------------------------------
--------------------------------------------------------------------------------
opposite_of : Type -> Type
opposite_of d =
case d of
Left -> Right
Right -> Left
Up -> Down
Down -> Up
None -> None
to_string : Type -> String
to_string dir =
case dir of
Right -> "R"
Left -> "L"
Up -> "U"
Down -> "D"
None -> "N"
decoder : (Json.Decode.Decoder Type)
decoder = (Json.Decode.map (from_string) Json.Decode.string)
|
