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Add {From,To}Dhall instances for DayOfWeek #2413

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Merged
Gabriella439 merged 2 commits into from
Apr 21, 2022
Merged

Add {From,To}Dhall instances for DayOfWeek #2413

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304582c
Add `{From,To}Dhall` instances for `DayOfWeek`
Gabriella439 Apr 21, 2022
9def574
Fix missing haddocks
Gabriella439 Apr 21, 2022
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37 changes: 37 additions & 0 deletions dhall/src/Dhall/Marshal/Decode.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE RankNTypes #-}
Expand Down Expand Up @@ -61,6 +62,7 @@ module Dhall.Marshal.Decode
, localTime
, zonedTime
, utcTime
, dayOfWeek
-- ** Containers
, maybe
, pair
Expand Down Expand Up @@ -151,6 +153,7 @@ import Dhall.Syntax
( Chunks (..)
, DhallDouble (..)
, Expr (..)
, FieldSelection (..)
, FunctionBinding (..)
, Var (..)
)
Expand Down Expand Up @@ -336,6 +339,9 @@ instance FromDhall Time.ZonedTime where
instance FromDhall Time.UTCTime where
autoWith _ = utcTime

instance FromDhall Time.DayOfWeek where
autoWith _ = dayOfWeek

{-| Note that this instance will throw errors in the presence of duplicates in
the list. To ignore duplicates, use `setIgnoringDuplicates`.
-}
Expand Down Expand Up @@ -999,6 +1005,37 @@ zonedTime = record $
utcTime :: Decoder Time.UTCTime
utcTime = Time.zonedTimeToUTC <$> zonedTime

dayOfWeek :: Decoder Time.DayOfWeek
dayOfWeek = Decoder{..}
where
extract expr@(Field _ FieldSelection{ fieldSelectionLabel }) =
case fieldSelectionLabel of
"Sunday" -> pure Time.Sunday
"Monday" -> pure Time.Monday
"Tuesday" -> pure Time.Tuesday
"Wednesday" -> pure Time.Wednesday
"Thursday" -> pure Time.Thursday
"Friday" -> pure Time.Friday
"Saturday" -> pure Time.Saturday
_ -> typeError expected expr
extract expr =
typeError expected expr

expected =
pure
(Union
(Dhall.Map.fromList
[ ("Sunday", Nothing)
, ("Monday", Nothing)
, ("Tuesday", Nothing)
, ("Wednesday", Nothing)
, ("Thursday", Nothing)
, ("Friday", Nothing)
, ("Saturday", Nothing)
]
)
)

{-| Decode a `Maybe`.

>>> input (maybe natural) "Some 1"
Expand Down
31 changes: 31 additions & 0 deletions dhall/src/Dhall/Marshal/Encode.hs
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Expand Up @@ -382,6 +382,37 @@ instance ToDhall Time.ZonedTime where
instance ToDhall Time.UTCTime where
injectWith = contramap (Time.utcToZonedTime Time.utc) . injectWith

instance ToDhall Time.DayOfWeek where
injectWith _ = Encoder{..}
where
embed Time.Sunday =
Field declared (Core.makeFieldSelection "Sunday")
embed Time.Monday =
Field declared (Core.makeFieldSelection "Monday" )
embed Time.Tuesday =
Field declared (Core.makeFieldSelection "Tuesday")
embed Time.Wednesday =
Field declared (Core.makeFieldSelection "Wednesday")
embed Time.Thursday =
Field declared (Core.makeFieldSelection "Thursday")
embed Time.Friday =
Field declared (Core.makeFieldSelection "Friday")
embed Time.Saturday =
Field declared (Core.makeFieldSelection "Saturday")

declared =
Union
(Dhall.Map.fromList
[ ("Sunday", Nothing)
, ("Monday", Nothing)
, ("Tuesday", Nothing)
, ("Wednesday", Nothing)
, ("Thursday", Nothing)
, ("Friday", Nothing)
, ("Saturday", Nothing)
]
)

{-| Note that the output list will be sorted.

>>> let x = Data.Set.fromList ["mom", "hi" :: Text]
Expand Down