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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DefaultSignatures #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeOperators #-}
module Server.ControlRoom where
import Control.Monad.IO.Class (MonadIO (liftIO))
import Data.Maybe (maybeToList)
import Data.Swagger (ToSchema (..))
import Data.Text (Text)
import qualified Data.Text as T
import Data.Time (Day)
import GHC.Generics (C1, D1, Generic (Rep), K1,
Meta (..), Rec0, S1, U1,
type (:*:), type (:+:))
import GHC.TypeLits (KnownSymbol, symbolVal)
import GTFS
import Lucid
import Servant
import Servant.API (Capture, Get, JSON, NoContent,
PlainText, Post, QueryParam,
ReqBody, type (:<|>) ((:<|>)))
import Servant.HTML.Lucid (HTML)
import Server.Util
import Web.FormUrlEncoded (ToForm)
import Web.Internal.FormUrlEncoded (Form)
data TripList = TripList
{ tripListHeader :: Text
, tripListType :: Text
, tripListTrips :: [TripID]
}
type ControlRoomAPI =
Get '[HTML] TripList
:<|> "irgendwo" :> ReqBody '[FormUrlEncoded] CalendarDate :> Post '[PlainText] Text
controlRoomServer :: Service ControlRoomAPI
controlRoomServer =
(pure (TripList "hallo" "welt" []))
:<|> (\text -> do
liftIO $ putStrLn (show text)
pure "hello"
)
class GToHtmlFormInput a where
gtoHtmlFormInput :: Text -> Proxy (a p) -> Html ()
instance (KnownSymbol name)
=> GToHtmlFormInput (C1 (MetaCons name f s) U1) where
gtoHtmlFormInput group _ = do
input_ [type_ "radio", id_ name, value_ name, name_ group] -- need a shared name for all options here
label_ [for_ name] (toHtml name)
where name = T.pack (symbolVal (Proxy @name))
instance (GToHtmlFormInput l, GToHtmlFormInput r) => GToHtmlFormInput (l :+: r) where
gtoHtmlFormInput group _ = do
gtoHtmlFormInput group (Proxy @(l _))
gtoHtmlFormInput group (Proxy @(r _))
-- | ignore constructor & type metainfo
instance GToHtmlFormInput a => GToHtmlFormInput (D1 r a) where
gtoHtmlFormInput group _ = gtoHtmlFormInput group (Proxy @(a _))
class ToHtmlFormInput a where
toFormInput :: Text -> Proxy a -> Html ()
default toFormInput :: (GToHtmlFormInput (Rep a)) => Text -> Proxy a -> Html ()
toFormInput group p = gtoHtmlFormInput group (Proxy @(Rep a _))
instance ToHtmlFormInput Text where
toFormInput name _ = input_ [type_ "text", name_ name, placeholder_ name]
instance ToHtmlFormInput Day where
toFormInput name _ = input_ [type_ "text", name_ name]
instance ToHtmlFormInput CalendarExceptionType
-- | generic conversion of record data types to input forms
class GToHtmlForm a where
gtoHtmlForm :: Proxy (a p) -> Html ()
-- | each record field is a form input
instance (KnownSymbol name, ToHtmlFormInput a)
=> GToHtmlForm (S1 (MetaSel (Just name) su ss ds) (Rec0 a)) where
gtoHtmlForm _ = toFormInput (T.pack (symbolVal (Proxy @name))) (Proxy @a)
-- | just chain all fields
instance (GToHtmlForm l, GToHtmlForm r) => GToHtmlForm (l :*: r) where
gtoHtmlForm _ = do
gtoHtmlForm (Proxy @(l _))
gtoHtmlForm (Proxy @(r _))
-- | ignore constructor & type metainfo
instance GToHtmlForm a => GToHtmlForm (D1 r a) where
gtoHtmlForm _ = gtoHtmlForm (Proxy @(a _))
instance GToHtmlForm a => GToHtmlForm (C1 r a) where
gtoHtmlForm _ = gtoHtmlForm (Proxy @(a _))
class ToHtmlForm a where
toHtmlForm :: Proxy a -> Html ()
default toHtmlForm :: (GToHtmlForm (Rep a)) => Proxy a -> Html ()
toHtmlForm = genericToHtmlForm defaultOptions
data HtmlFormOptions = HtmlFormOptions
{ htmlFormAction :: Maybe Text
, htmlFormMethod :: Text
, htmlFormSubmitButtonText :: Text
}
defaultOptions ::HtmlFormOptions
defaultOptions = HtmlFormOptions Nothing "post" "Ok"
genericToHtmlForm :: (GToHtmlForm (Rep a2)) => HtmlFormOptions -> Proxy a2 -> Html ()
genericToHtmlForm HtmlFormOptions{..} (Proxy :: Proxy a) =
form_ ((method_ htmlFormMethod) : maybeToList (fmap action_ htmlFormAction)) $ do
gtoHtmlForm (Proxy @(Rep a _))
input_ [type_ "submit", value_ htmlFormSubmitButtonText]
instance ToHtmlForm CalendarDate
instance ToSchema Form where
declareNamedSchema _ = undefined
instance ToSchema TripList where
declareNamedSchema _ = undefined
instance ToSchema CalendarDate where
declareNamedSchema _ = undefined
|
