95 lines
2.7 KiB
Haskell
95 lines
2.7 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.Barcode where
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import Import
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getHomeBarcodeR :: Handler Html
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getHomeBarcodeR = do
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eub <- handleSelectParam
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case eub of
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Just (Left uId) ->
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redirect $ SelectR uId
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Just (Right _) -> do
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setMessageI MsgBarcodeNotUser
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redirect HomeR
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Nothing ->
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redirect HomeR
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getSelectBarcodeR :: UserId -> Handler Html
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getSelectBarcodeR uId = do
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eub <- handleSelectParam
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case eub of
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Just (Right bId) ->
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redirect $ BuyR uId bId
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Just (Left _) -> do
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setMessageI MsgBarcodeNotBev
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redirect $ SelectR uId
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Nothing ->
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redirect $ SelectR uId
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getSelectCashBarcodeR :: Handler Html
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getSelectCashBarcodeR = do
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eub <- handleSelectParam
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case eub of
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Just (Right bId) ->
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redirect $ BuyCashR bId
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Just (Left _) -> do
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setMessageI MsgBarcodeNotBev
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redirect SelectCashR
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Nothing ->
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redirect SelectCashR
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getRestockBarcodeR :: Handler Html
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getRestockBarcodeR = do
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eub <- handleSelectParam
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case eub of
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Just (Right bId) ->
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redirect $ UpstockR bId
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Just (Left _) -> do
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setMessageI MsgBarcodeNotBev
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redirect RestockR
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Nothing ->
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redirect RestockR
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handleSelectParam :: Handler (Maybe (Either UserId BeverageId))
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handleSelectParam = do
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c <- lookupGetParam "barcode"
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case c of
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Just code -> do
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be <- runDB $ getBy $ UniqueBarcode code
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case be of
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Just (Entity _ bar) ->
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if barcodeIsUser bar
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then
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case (barcodeUser bar, barcodeBev bar) of
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(Just uId, Nothing) ->
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return $ Just $ Left uId
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_ ->
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error "Malformed barcode"
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else
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case (barcodeBev bar, barcodeUser bar) of
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(Just bId, Nothing) ->
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return $ Just $ Right bId
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_ ->
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error "Malformed barcode"
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Nothing -> do
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setMessageI MsgBarcodeUnknown
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return Nothing
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Nothing -> do
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setMessageI MsgProvideBarcode
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return Nothing
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