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|
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE NoImplicitPrelude #-}
-- | Hero app frontend
--
-- : exe mmc.js
--
-- : dep aeson
-- : dep clay
-- : dep containers
-- : dep miso
-- : dep protolude
-- : dep servant
-- : dep split
-- : dep string-quote
-- : dep text
-- : dep ghcjs-base
module Hero.Client where
import Hero.App ( Action(..)
, Comic(..)
, ComicReaderState(..)
, ComicReaderView(..)
, Model(..)
, AudioState(..)
, audioId
, chooseExperienceLink
, comicPlayerSpreadLink
, comicPlayerFullLink
, comicVideoLink
, handlers
, initModel
, the404
, routes
)
import qualified Network.RemoteData as Network
import Data.Aeson ( eitherDecodeStrict )
import qualified Data.Set as Set
import qualified GHC.Show as Legacy
import JavaScript.Web.XMLHttpRequest ( Request(..)
, Method(GET)
, RequestData(NoData)
, contents
, xhrByteString
)
import Miso
import Miso.Effect.DOM (scrollIntoView)
import qualified Miso.FFI.Audio as Audio
import qualified Miso.FFI.Document as Document
import qualified Miso.FFI.Fullscreen as Fullscreen
import Miso.String
import Protolude
-- | Entry point for a miso application
main :: IO ()
main = miso $ \currentURI -> App { model = initModel currentURI, .. }
where
update = move
view = see
subs = [ uriSub HandleURI
, keyboardSub keynav
]
events = defaultEvents
initialAction = FetchComics
mountPoint = Nothing
(∈) :: Ord a => a -> Set a -> Bool
(∈) = Set.member
-- | Keyboard navigation - maps keys to actions.
keynav :: Set Int -> Action
keynav ks
| 37 ∈ ks = PrevPage -- ^ left arrow
| 39 ∈ ks = NextPage -- ^ right arrow
| 191 ∈ ks = DumpModel -- ^ ?
| 32 ∈ ks = ToggleAudio audioId -- ^ SPC
| otherwise = NoOp
see :: Model -> View Action
see model =
case runRoute routes handlers uri model of
Left _ -> the404 model
Right v -> v
-- | Console-logging
foreign import javascript unsafe "console.log($1);"
say :: MisoString -> IO ()
-- | Updates model, optionally introduces side effects
move :: Action -> Model -> Effect Action Model
move NoOp model = noEff model
move DumpModel model = model <# do
say $ ms $ Legacy.show model
pure NoOp
move (SelectExperience comic) model = model { cpState = ChooseExperience (comicId comic) 1 }
<# do pure $ ChangeURI $ chooseExperienceLink (comicId comic) 1
move (StartReading comic) model = model { cpState = Reading Spread (comicId comic) 1 }
<# do pure $ ChangeURI $ comicPlayerSpreadLink (comicId comic) 1
move (StartWatching comic) model = model { cpState = Watching (comicId comic) }
<# do pure $ ChangeURI $ comicVideoLink (comicId comic) 1
move NextPage model = case cpState model of
Reading Spread id pg ->
model { cpState = Reading Spread id (pg+2) } <# do
pure $ ChangeURI $ comicPlayerSpreadLink id (pg+2)
Reading Full id pg ->
model { cpState = Reading Full id (pg+1) } <# do
pure $ ChangeURI $ comicPlayerFullLink id (pg+1)
Cover id ->
model { cpState = Reading Spread id 1 } <# do
pure $ ChangeURI $ comicPlayerSpreadLink id 1
_ -> noEff model
move PrevPage model = case cpState model of
Reading Spread id pg ->
model { cpState = Reading Spread id (pg-2) } <# do
pure $ ChangeURI $ comicPlayerSpreadLink id (pg-2)
Reading Full id pg ->
model { cpState = Reading Full id (pg-1) } <# do
pure $ ChangeURI $ comicPlayerFullLink id (pg-1)
Cover _ -> noEff model
_ -> noEff model
move (ToggleZoom c pg) m = m { cpState = newState } <# do pure act
where
goto lnk = ChangeURI $ lnk (comicId c) pg
reading v = Reading v (comicId c) pg
(newState, act) = case cpState m of
Reading Full _ _ -> (reading Spread, goto comicPlayerSpreadLink)
Reading Spread _ _ -> (reading Full, goto comicPlayerFullLink)
x -> (x, NoOp)
move (ToggleInLibrary c) model = model { userLibrary = newLib } <# pure NoOp
where
newLib | c `elem` (userLibrary model) =
Protolude.filter (/= c) $ userLibrary model
| otherwise = c : (userLibrary model)
move (HandleURI u) model = model { uri = u } <# pure NoOp
move (ChangeURI u) model = model <# do
pushURI u
pure NoOp
move FetchComics model = model <# (SetComics <$> fetchComics)
move (SetComics cs) model = noEff model { appComics = cs }
move (ToggleAudio i ) model = model { cpAudioState = newState } <# do
el <- Document.getElementById i
toggle el
pure NoOp
where
(newState, toggle) = case cpAudioState model of
Playing -> (Paused, Audio.pause)
Paused -> (Playing, Audio.play)
move ToggleFullscreen model = model { cpState = newState } <# do
el <- Document.querySelector "body"
-- TODO: check Document.fullscreenEnabled
-- https://developer.mozilla.org/en-US/docs/Web/API/Document/fullscreenEnabled
_ <- toggle el
pure NoOp
where
(toggle, newState) = case cpState model of
Reading Full c n -> (const Fullscreen.exit, Reading Full c n)
Reading Spread c n -> (Fullscreen.request, Reading Spread c n)
-- otherwise, do nothing:
x -> (pure, x)
move (SetMediaInfo x) model = model { dMediaInfo = x } <# do
case x of
Just Comic {comicId = id} ->
pure $ ScrollIntoView $ "comic-" <> ms id
Nothing ->
pure NoOp
move (ScrollIntoView id) model = model <# do
say $ ms $ Legacy.show id
scrollIntoView id
pure NoOp
fetchComics :: IO (Network.RemoteData MisoString [Comic])
fetchComics = do
mjson <- contents <$> xhrByteString req
case mjson of
Nothing ->
pure $ Network.Failure "Could not fetch comics from server."
Just json -> pure $ Network.fromEither
$ either (Left . ms) pure
$ eitherDecodeStrict json
where
req = Request
{ reqMethod = GET
, reqURI = "/api/comic" -- FIXME: can we replace this hardcoding?
, reqLogin = Nothing
, reqHeaders = []
, reqWithCredentials = False
, reqData = NoData
}
|
