149 lines
4.6 KiB
Haskell
149 lines
4.6 KiB
Haskell
-- yammat - Yet Another MateMAT
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-- Copyright (C) 2015 Amedeo Molnár
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU Affero General Public License as published
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-- by the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU Affero General Public License for more details.
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--
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-- You should have received a copy of the GNU Affero General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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module Handler.Buy where
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import Import
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import Handler.Common
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import Text.Shakespeare.Text
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getBuyR :: UserId -> BeverageId -> Handler Html
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getBuyR uId bId = do
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mTup <- checkData uId bId
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case mTup of
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Just (_, bev) -> do
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master <- getYesod
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(buyWidget, enctype) <- generateFormPost
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$ renderBootstrap3 BootstrapBasicForm
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$ buyForm
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defaultLayout $
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$(widgetFile "buy")
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Nothing -> do
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setMessageI MsgUserOrArticleUnknown
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redirect HomeR
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postBuyR :: UserId -> BeverageId -> Handler Html
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postBuyR uId bId = do
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mTup <- checkData uId bId
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case mTup of
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Just (user, bev) -> do
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((res, _), _) <- runFormPost
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$ renderBootstrap3 BootstrapBasicForm
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$ buyForm
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case res of
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FormSuccess quant -> do
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if quant > beverageAmount bev
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then do
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setMessageI MsgNotEnoughItems
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redirect $ BuyR uId bId
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else do
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let price = quant * (beveragePrice bev)
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let sw = price > (userBalance user)
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runDB $ update uId [UserBalance -=. price]
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runDB $ update bId [BeverageAmount -=. quant]
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checkAlert bId
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master <- getYesod
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liftIO $ notifyUser user bev price master
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case sw of
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False -> do
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setMessageI MsgPurchaseSuccess
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redirect HomeR
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True -> do
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setMessageI MsgPurchaseDebtful
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redirect HomeR
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_ -> do
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setMessageI MsgErrorOccured
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redirect HomeR
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Nothing -> do
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setMessageI MsgUserUnknown
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redirect HomeR
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notifyUser :: User -> Beverage -> Int -> App -> IO ()
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notifyUser user bev price master = do
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case userEmail user of
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Just email ->
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liftIO $ sendMail email "Einkauf beim Matematen"
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[stext|
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Hallo #{userIdent user},
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Du hast gerade beim Matematen für #{formatIntCurrency price}#{appCurrency $ appSettings master} #{beverageIdent bev} eingekauft.
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Viele Grüsse,
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Der Matemat
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|]
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Nothing ->
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return ()
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getBuyCashR :: BeverageId -> Handler Html
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getBuyCashR bId = do
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mBev <- runDB $ get bId
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case mBev of
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Just bev -> do
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master <- getYesod
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(buyCashWidget, enctype) <- generateFormPost
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$ renderBootstrap3 BootstrapBasicForm
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$ buyForm
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defaultLayout $
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$(widgetFile "buyCash")
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Nothing -> do
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setMessageI MsgItemUnknown
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redirect HomeR
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postBuyCashR :: BeverageId -> Handler Html
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postBuyCashR bId = do
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mBev <- runDB $ get bId
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case mBev of
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Just bev -> do
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((res, _), _) <- runFormPost
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$ renderBootstrap3 BootstrapBasicForm
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$ buyForm
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case res of
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FormSuccess quant -> do
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if quant > beverageAmount bev
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then do
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setMessageI MsgNotEnoughItems
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redirect $ BuyCashR bId
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else do
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master <- getYesod
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let price = quant * (beveragePrice bev + appCashCharge (appSettings master))
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runDB $ update bId [BeverageAmount -=. quant]
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updateCashier price "Barzahlung"
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checkAlert bId
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let currency = appCurrency $ appSettings master
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setMessageI $ MsgPurchaseSuccessCash price currency
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redirect HomeR
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_ -> do
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setMessageI MsgItemDisappeared
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redirect HomeR
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Nothing -> do
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setMessageI MsgItemUnknown
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redirect HomeR
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checkData :: UserId -> BeverageId -> Handler (Maybe (User, Beverage))
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checkData uId bId = do
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mUser <- runDB $ get uId
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mBev <- runDB $ get bId
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case mUser of
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Just user -> do
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case mBev of
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Just bev -> return $ Just (user, bev)
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Nothing -> return Nothing
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Nothing -> return Nothing
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buyForm :: AForm Handler Int
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buyForm = areq amountField (bfs MsgAmount) (Just 1)
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<* bootstrapSubmit (msgToBSSubmit MsgPurchase)
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