199 lines
6.7 KiB
Haskell
199 lines
6.7 KiB
Haskell
-- | Common handler functions.
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module Handler.Common where
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import Data.FileEmbed (embedFile)
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import qualified Data.Text as T
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import qualified Data.List as L
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import qualified Data.Text.Lazy.Encoding as E
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import qualified Data.Text.Read as R
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import Data.Maybe
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import qualified Data.Char as C
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import Yesod.Form.Functions
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import Text.Shakespeare.Text
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import Network.Mail.Mime
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import Import
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-- These handlers embed files in the executable at compile time to avoid a
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-- runtime dependency, and for efficiency.
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getFaviconR :: Handler TypedContent
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getFaviconR = return $ TypedContent "image/x-icon"
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$ toContent $(embedFile "config/favicon.ico")
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getRobotsR :: Handler TypedContent
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getRobotsR = return $ TypedContent typePlain
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$ toContent $(embedFile "config/robots.txt")
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removeItem :: Eq a => a -> [a] -> [a]
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removeItem _ [] = []
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removeItem x (y:ys)
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| x == y = removeItem x ys
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| otherwise = y : (removeItem x ys)
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updateCashier :: Int -> Text -> Handler ()
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updateCashier amount desc = do
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mCashier <- runDB $ selectFirst [] [Desc CashierId]
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trans <- liftIO $ (\time -> return $ Transaction desc amount time) =<< getCurrentTime
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case mCashier of
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Just entCash -> do
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runDB $ update (entityKey entCash) [CashierBalance +=. amount]
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runDB $ insert_ trans
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Nothing -> do
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currentTime <- liftIO getCurrentTime
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runDB $ insert_ $ Cashier amount currentTime
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runDB $ insert_ trans
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getCashierBalance :: Handler Int
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getCashierBalance = do
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mCashier <- runDB $ selectFirst [] [Desc CashierId]
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case mCashier of
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Just cashier -> do
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return $ cashierBalance $ entityVal cashier
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Nothing -> do
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return 0
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currencyField :: (RenderMessage (HandlerSite m) FormMessage, Show a, Monad m, Integral a) => Field m a
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currencyField = Field
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{ fieldParse = parseHelper $ \rawVals ->
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case R.double (prependZero rawVals) of
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Right (a, "") -> Right $ floor $ 100 * a
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_ -> Left $ MsgInvalidNumber rawVals
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, fieldView = \theId name attr val req -> toWidget [hamlet|$newline never
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<input id=#{theId} name=#{name} *{attr} type="number" step=0.01 min=0 :req:required="required" value=#{showVal val}>
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|]
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, fieldEnctype = UrlEncoded
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}
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where
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showVal = either id (pack . showA)
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showA x = show ((fromIntegral x :: Double) / 100)
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volumeField :: (RenderMessage (HandlerSite m) FormMessage, Show a, Monad m, Integral a) => Field m a
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volumeField = Field
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{ fieldParse = parseHelper $ \rawVals ->
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case R.double (prependZero rawVals) of
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Right (a, "") -> Right $ floor $ 1000 * a
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_ -> Left $ MsgInvalidNumber rawVals
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, fieldView = \theId name attr val req -> toWidget [hamlet|$newline never
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<input id=#{theId} name=#{name} *{attr} type="number" step=0.01 min=0 :req:required="required" value=#{showVal val}>
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|]
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, fieldEnctype = UrlEncoded
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}
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where
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showVal = either id (pack . showA)
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showA x = show ((fromIntegral x :: Double) / 1000)
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barcodeField = Field
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{ fieldParse = parseHelper $ Right . removeItem "" . L.nub . T.splitOn ", "
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, fieldView = \theId name attrs val isReq -> toWidget [hamlet|$newline never
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<input type="text" id="#{theId}" name="#{name}" :isReq:required="" *{attrs} value="#{either id (T.intercalate ", ") val}">
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|]
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, fieldEnctype = UrlEncoded
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}
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handleBarcodes :: Either UserId BeverageId -> [Text] -> Handler ()
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handleBarcodes (Left uId) nbs = do
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raws <- runDB $ selectList [BarcodeUser ==. Just uId] []
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obs <- return $ map (barcodeCode . entityVal) raws
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toDel <- return $ obs L.\\ nbs
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toAdd <- return $ nbs L.\\ obs
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_ <- mapM (\b -> runDB $ insert_ $ Barcode
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b
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True
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(Just uId)
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Nothing
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) toAdd
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ents <- mapM (runDB . getBy . UniqueBarcode) toDel
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mapM_ (runDB . delete . entityKey . fromJust) ents
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handleBarcodes (Right bId) nbs = do
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raws <- runDB $ selectList [BarcodeBev ==. Just bId] []
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obs <- return $ map (barcodeCode . entityVal) raws
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toDel <- return $ obs L.\\ nbs
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toAdd <- return $ nbs L.\\ obs
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_ <- mapM (\b -> runDB $ insert $ Barcode
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b
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False
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Nothing
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(Just bId)
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) toAdd
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ents <- mapM (runDB . getBy . UniqueBarcode) toDel
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mapM_ (runDB . delete . entityKey . fromJust) ents
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handleGetParam :: Maybe Text -> Either UserId BeverageId -> Handler ()
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handleGetParam Nothing _ =
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return ()
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handleGetParam (Just b) eub = do
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f <- return $ T.filter C.isAlphaNum b
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case (T.length f) > 0 of
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True -> do
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e <- runDB $ getBy $ UniqueBarcode f
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case e of
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Nothing -> do
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_ <- case eub of
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Left uId -> do
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-- should usernames containing, among other, spaces cause problems, replace b for f here
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runDB $ insert_ $ Barcode b True (Just uId) Nothing
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Right bId -> do
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-- and here
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runDB $ insert_ $ Barcode b False Nothing (Just bId)
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setMessageI MsgBarcodeAdded
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Just _ ->
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setMessageI MsgBarcodeDuplicate
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False -> do
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setMessageI MsgProvideBarcode
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amountField :: (RenderMessage (HandlerSite m) FormMessage, Show a, Monad m, Integral a) => Field m a
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amountField = Field
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{ fieldParse = parseHelper $ \s ->
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case R.decimal s of
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Right (a, "") -> Right a
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_ -> Left $ MsgInvalidInteger s
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, fieldView = \theId name attr val req -> toWidget [hamlet|$newline never
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<input id="crement" id=#{theId} name=#{name} *{attr} type="number" step=1 min=0 :req:required="required" value="#{showVal val}">
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|]
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, fieldEnctype = UrlEncoded
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}
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where
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showVal = either id (pack . showI)
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showI x = show (fromIntegral x :: Integer)
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checkAlert :: BeverageId -> Handler ()
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checkAlert bId = do
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bev <- runDB $ getJust bId
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case beverageAmount bev < beverageAlertAmount bev of
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True -> do
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master <- getYesod
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to <- return $ appEmail $ appSettings master
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liftIO $ sendMail to "Niedriger Bestand"
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[stext|
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Hallo,
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Der Bestand an #{beverageIdent bev} ist unterhalb der Warnschwelle von #{beverageAlertAmount bev}.
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Der momentane Bestand ist bei #{beverageAmount bev} Artikeln.
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Viele Grüße,
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der Matemat
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|]
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False -> return () -- do nothing
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--sendMail :: MonadIO m => Text -> Text -> Text -> m ()
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sendMail to subject body =
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renderSendMail
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Mail
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{ mailFrom = Address Nothing "noreply"
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, mailTo = [Address Nothing to]
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, mailCc = []
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, mailBcc = []
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, mailHeaders = [("Subject", subject),
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("List-Id", "\"Matemat\" <matemat@matemat.hq.c3d2.de>")]
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, mailParts =[[Part
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{ partType = "text/plain; charset=utf-8"
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, partEncoding = None
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, partFilename = Nothing
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, partHeaders = []
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, partContent = E.encodeUtf8 body
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}]]
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}
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formatIntVolume :: Int -> Text
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formatIntVolume x = formatFloat $ ((fromIntegral x) / 1000)
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