138 lines
3.9 KiB
Haskell
138 lines
3.9 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PackageImports #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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module Control.Buy where
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import Servant
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import Servant.Client
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import Servant.Client.Core.Auth (mkAuthenticatedRequest)
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import qualified Data.Text as T
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import Data.Text.I18n
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import Data.String (fromString)
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import Data.Maybe (fromMaybe)
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import Data.List (sortOn)
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import Control.Monad (void)
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import Control.Monad.Reader (ask, asks)
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import Control.Monad.IO.Class (liftIO)
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-- imports from "mateamt"
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import qualified "mateamt" Types as MT
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-- internal imports
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import Types
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import View
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import Util
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import Client
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import ClientAuth
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import API
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buyControl
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:: Maybe T.Text
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-> Int
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-> [MT.PurchaseDetail]
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-> UserHandler BuyConfirmPage
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buyControl mcookie uid pds =
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if not (null pds)
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then do
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(ReadState l10n backend _) <- ask
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let (token, _) = parseTokenAndUser mcookie
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loc = Locale
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(fromMaybe "en" $ lookup "locale" =<< fmap parseCookieText mcookie)
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pids = map MT.purchaseDetailProduct pds
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epsovs <- liftIO $ runClientM
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(productShortList (Just MT.AllProducts))
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backend
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case epsovs of
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Right psovs -> do
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let currentPsovs = filter
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((`elem` pids) . MT.productShortOverviewId)
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psovs
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ziptup = sortOn (MT.productShortOverviewIdent . snd) (zip
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(sortOn MT.purchaseDetailProduct pds)
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(sortOn MT.productShortOverviewId currentPsovs)
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)
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total = foldl
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(\acc
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( MT.PurchaseDetail _ amount
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, MT.ProductShortOverview _ _ price _ _ _) ->
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acc + (max 0 amount) * price
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)
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0
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ziptup
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return (buyConfirmPage l10n loc uid ziptup total)
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else
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throwError (redirect303 $ userOverviewLink uid Nothing)
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purchaseControl
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:: Maybe T.Text
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-> Int
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-> [MT.PurchaseDetail]
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-> UserHandler UserSelectPage
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purchaseControl mcookie uid pds =
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if not (null pds)
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then do
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backend <- asks rsBackend
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let (token, _) = parseTokenAndUser mcookie
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eresult <- liftIO $ runClientM
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(buy
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(mkAuthenticatedRequest token authenticateReq)
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pds
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)
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backend
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case eresult of
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Right result -> case result of
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(MT.PurchaseResult MT.PurchaseOK []) ->
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logoutAndRedirectHome backend token
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(MT.PurchaseResult MT.PurchaseDebtful []) ->
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logoutAndRedirectHome backend token
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(MT.PurchaseResult (MT.PayAmount price) []) ->
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throwError $ err500
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{ errBody =
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"No messaging system implemented. "
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<> "Purchase was processed, though. "
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<> "Please pay " <> (fromString $ T.unpack $ formatMoney price)
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<> " in cash."
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}
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(MT.PurchaseResult (MT.PayAmount price) miss) ->
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throwError $ err500
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{ errBody =
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"No messaging system implemented. "
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<> "Purchase was processed, though. "
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<> "Please pay " <> (fromString $ T.unpack $ formatMoney price)
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<> " in cash. "
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<> "Stock is lacking following items: "
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<> fromString (show miss)
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}
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(MT.PurchaseResult _ miss) ->
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throwError $ err500
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{ errBody =
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"No messaging system implemented. "
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<> "Purchase was processed, though. "
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<> "Stock is lacking following items: "
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<> fromString (show miss)
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}
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Left err ->
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throwError $ err500
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{ errBody = fromString (show err)
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}
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else
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throwError (redirect303 $ userOverviewLink uid Nothing)
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where
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logoutAndRedirectHome backend token = do
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void $ liftIO $ runClientM
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(authLogout
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(mkAuthenticatedRequest token authenticateReq)
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)
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backend
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throwError $ redirect303 userSelectLink
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