{-# LANGUAGE FlexibleContexts #-}

module Saturn.Unstable.Type.Month where

import qualified Data.Coerce as Coerce
import qualified Data.Set as Set
import qualified Data.Text.Lazy.Builder as Builder
import qualified Data.Word as Word
import qualified Saturn.Unstable.Type.Field as Field
import qualified Text.Parsec as Parsec

newtype Month
  = Month Field.Field
  deriving (Month -> Month -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Month -> Month -> Bool
$c/= :: Month -> Month -> Bool
== :: Month -> Month -> Bool
$c== :: Month -> Month -> Bool
Eq, Int -> Month -> ShowS
[Month] -> ShowS
Month -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Month] -> ShowS
$cshowList :: [Month] -> ShowS
show :: Month -> String
$cshow :: Month -> String
showsPrec :: Int -> Month -> ShowS
$cshowsPrec :: Int -> Month -> ShowS
Show)

bounds :: (Word.Word8, Word.Word8)
bounds :: (Word8, Word8)
bounds = (Word8
1, Word8
12)

fromField :: Field.Field -> Maybe Month
fromField :: Field -> Maybe Month
fromField Field
field =
  if (Word8, Word8) -> Field -> Bool
Field.isValid (Word8, Word8)
bounds Field
field then forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ Field -> Month
Month Field
field else forall a. Maybe a
Nothing

toField :: Month -> Field.Field
toField :: Month -> Field
toField = coerce :: forall a b. Coercible a b => a -> b
Coerce.coerce

parsec :: (Parsec.Stream s m Char) => Parsec.ParsecT s u m Month
parsec :: forall s (m :: * -> *) u. Stream s m Char => ParsecT s u m Month
parsec = do
  Field
field <- forall s (m :: * -> *) u. Stream s m Char => ParsecT s u m Field
Field.parsec
  forall b a. b -> (a -> b) -> Maybe a -> b
maybe (forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"invalid Month") forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a b. (a -> b) -> a -> b
$ Field -> Maybe Month
fromField Field
field

toBuilder :: Month -> Builder.Builder
toBuilder :: Month -> Builder
toBuilder = Field -> Builder
Field.toBuilder forall b c a. (b -> c) -> (a -> b) -> a -> c
. Month -> Field
toField

expand :: Month -> Set.Set Word.Word8
expand :: Month -> Set Word8
expand = (Word8, Word8) -> Field -> Set Word8
Field.expand (Word8, Word8)
bounds forall b c a. (b -> c) -> (a -> b) -> a -> c
. Month -> Field
toField

isMatch :: Word.Word8 -> Month -> Bool
isMatch :: Word8 -> Month -> Bool
isMatch Word8
word8 = forall a. Ord a => a -> Set a -> Bool
Set.member Word8
word8 forall b c a. (b -> c) -> (a -> b) -> a -> c
. Month -> Set Word8
expand