module Gargantext.Hooks.Loader where import Data.Argonaut (class DecodeJson, class EncodeJson, decodeJson, encodeJson, (.:), (:=), (~>), jsonEmptyObject) import Data.Argonaut.Core (stringify) import Data.Argonaut.Parser (jsonParser) import Data.Either (Either(..)) import Data.Maybe (Maybe(..), isJust, maybe) import Data.Tuple (fst) import Data.Tuple.Nested ((/\)) import DOM.Simple.Console (log2) import Effect.Aff (Aff, launchAff_, throwError) import Effect.Class (liftEffect) import Effect.Exception (error) import Milkis as M import Reactix as R import Web.Storage.Storage as WSS import Gargantext.Components.LoadingSpinner (loadingSpinner) import Gargantext.Ends (class ToUrl, toUrl) import Gargantext.Prelude import Gargantext.Utils.Crypto (Hash) import Gargantext.Utils as GU import Gargantext.Utils.CacheAPI as GUC import Gargantext.Utils.Reactix as R2 useLoader :: forall path st. Eq path => path -> (path -> Aff st) -> (st -> R.Element) -> R.Hooks R.Element useLoader path loader render = do state <- R.useState' Nothing useLoaderEffect path state loader pure $ maybe (loadingSpinner {}) render (fst state) useLoaderEffect :: forall st path. Eq path => path -> R.State (Maybe st) -> (path -> Aff st) -> R.Hooks Unit useLoaderEffect path state@(state' /\ setState) loader = do oPath <- R.useRef path R.useEffect' $ do if (R.readRef oPath == path) && (isJust state') then pure $ pure unit else do R.setRef oPath path R2.affEffect "G.H.Loader.useLoaderEffect" $ do l <- loader path liftEffect $ setState $ const $ Just l newtype HashedResponse a = HashedResponse { hash :: Hash , value :: a } instance decodeHashedResponse :: DecodeJson a => DecodeJson (HashedResponse a) where decodeJson json = do obj <- decodeJson json hash <- obj .: "hash" value <- obj .: "value" pure $ HashedResponse { hash, value } instance encodeHashedResponse :: EncodeJson a => EncodeJson (HashedResponse a) where encodeJson (HashedResponse { hash, value }) = do "hash" := encodeJson hash ~> "value" := encodeJson value ~> jsonEmptyObject type LoaderWithCacheAPIProps path res ret = ( cacheEndpoint :: path -> Aff Hash , handleResponse :: HashedResponse res -> ret , mkRequest :: path -> GUC.Request , path :: path , renderer :: ret -> R.Element ) useLoaderWithCacheAPI :: forall path res ret. Eq path => DecodeJson res => Record (LoaderWithCacheAPIProps path res ret) -> R.Hooks R.Element useLoaderWithCacheAPI { cacheEndpoint, handleResponse, mkRequest, path, renderer } = do state <- R.useState' Nothing useCachedAPILoaderEffect { cacheEndpoint , handleResponse , mkRequest , path , state } pure $ maybe (loadingSpinner {}) renderer (fst state) type LoaderWithCacheAPIEffectProps path res ret = ( cacheEndpoint :: path -> Aff Hash , handleResponse :: HashedResponse res -> ret , mkRequest :: path -> GUC.Request , path :: path , state :: R.State (Maybe ret) ) useCachedAPILoaderEffect :: forall path res ret. Eq path => DecodeJson res => Record (LoaderWithCacheAPIEffectProps path res ret) -> R.Hooks Unit useCachedAPILoaderEffect { cacheEndpoint , handleResponse , mkRequest , path , state: state@(state' /\ setState) } = do oPath <- R.useRef path R.useEffect' $ do if (R.readRef oPath == path) && (isJust state') then pure unit else do R.setRef oPath path let cacheName = "cache-api-loader" let req = mkRequest path -- log2 "[useCachedLoader] mState" mState launchAff_ $ do cache <- GUC.openCache $ GUC.CacheName cacheName -- TODO Parallelize? hr@(HashedResponse { hash, value }) <- GUC.cachedJson cache req cacheReal <- cacheEndpoint path val <- if hash == cacheReal then pure hr else do _ <- GUC.delete cache req hr@(HashedResponse { hash, value }) <- GUC.cachedJson cache req if hash == cacheReal then pure hr else throwError $ error $ "Fetched clean cache but hashes don't match" liftEffect $ do setState $ const $ Just $ handleResponse val