proper handling of pure whitespace barcodes.

Handler/Common.hs

@@ -7,6 +7,7 @@ import qualified Data.List as L
 import qualified Data.Text.Lazy.Encoding as E
 import qualified Data.Text.Read as R
 import Data.Maybe
+import qualified Data.Char as C
 import Yesod.Form.Functions
 import Text.Shakespeare.Text
 import Network.Mail.Mime
@@ -93,53 +94,52 @@ handleBarcodes :: Either UserId BeverageId -> [Text] -> Handler ()
 handleBarcodes (Left uId) nbs = do
   raws <- runDB $ selectList [BarcodeUser ==. Just uId] []
   obs <- return $ map (barcodeCode . entityVal) raws
-  case length nbs > length obs of
-    True -> do
-      sect <- return $ nbs L.\\ obs
-      _ <- mapM (\b -> runDB $ insert $ Barcode
+  toDel <- return $ obs L.\\ nbs
+  toAdd <- return $ nbs L.\\ obs
+  _ <- mapM (\b -> runDB $ insert_ $ Barcode
     b
     True
     (Just uId)
     Nothing
-        ) sect
-      return ()
-    False -> do
-      sect <- return $ obs L.\\ nbs
-      ents <- mapM (runDB . getBy . UniqueBarcode) sect
+    ) toAdd
+  ents <- mapM (runDB . getBy . UniqueBarcode) toDel
   mapM_ (runDB . delete . entityKey . fromJust) ents
 handleBarcodes (Right bId) nbs = do
   raws <- runDB $ selectList [BarcodeBev ==. Just bId] []
   obs <- return $ map (barcodeCode . entityVal) raws
-  case length nbs > length obs of
-    True -> do
-      sect <- return $ nbs L.\\ obs
+  toDel <- return $ obs L.\\ nbs
+  toAdd <- return $ nbs L.\\ obs
   _ <- mapM (\b -> runDB $ insert $ Barcode
     b
     False
     Nothing
     (Just bId)
-        ) sect
-      return ()
-    False -> do
-      sect <- return $ obs L.\\ nbs
-      ents <- mapM (runDB . getBy . UniqueBarcode) sect
+    ) toAdd
+  ents <- mapM (runDB . getBy . UniqueBarcode) toDel
   mapM_ (runDB . delete . entityKey . fromJust) ents
 
 handleGetParam :: Maybe Text -> Either UserId BeverageId -> Handler ()
 handleGetParam Nothing _ =
   return ()
 handleGetParam (Just b) eub = do
-  e <- runDB $ getBy $ UniqueBarcode b
+  f <- return $ T.filter C.isAlphaNum b
+  case (T.length f) > 0 of
+    True -> do
+      e <- runDB $ getBy $ UniqueBarcode f
       case e of
         Nothing -> do
           _ <- case eub of
             Left uId -> do
+              -- should usernames containing, among other, spaces cause problems, replace b for f here
               runDB $ insert_ $ Barcode b True (Just uId) Nothing
             Right bId -> do
+              -- and here
               runDB $ insert_ $ Barcode b False Nothing (Just bId)
           setMessageI MsgBarcodeAdded
         Just _ ->
           setMessageI MsgBarcodeDuplicate
+    False -> do
+      setMessageI MsgProvideBarcode
 
 amountField :: (RenderMessage (HandlerSite m) FormMessage, Show a, Monad m, Integral a) => Field m a
 amountField = Field

messages/cz.msg

@@ -102,7 +102,7 @@ AvatarInUseError: Avatar nelze smazat dokud je v užitku
 Volume: Objem v l
 CorrectedAmount: Stráta
 BarcodeNotUser: Tento kód není pro uživatele, ale pro produkt
-ProvideBarcode: Prosím zadej kód
+ProvideBarcode: Prosím zadej správný kód
 BarcodeNotBev: Tento kód není pro produkt, ale pro uživatele
 BarcodeUnknown: Tento kód je neznámý
 BarcodeField: Čárový kódy

messages/de.msg

@@ -102,7 +102,7 @@ AvatarInUseError: Avatare können nicht gelöscht werden, solange sie in Benutzu
 Volume: Volumen in l
 CorrectedAmount: Schwund
 BarcodeNotUser: Dieser Barcode ist keinem Benutzer zugeordnet, sondern einem Produkt
-ProvideBarcode: Bitte Barcode angeben
+ProvideBarcode: Bitte korrekten Barcode angeben
 BarcodeNotBev: Dieser Barcode ist keinem Produkt zugeordnet, sondern einem Benutzer
 BarcodeUnknown: Dieser Barcode ist unbekannt
 BarcodeField: Barcodes

messages/en.msg

@@ -102,7 +102,7 @@ AvatarInUseError: You can not delete avatars that are currently in use
 Volume: Volume in l
 CorrectedAmount: Loss
 BarcodeNotUser: This barcode is no user, but a product
-ProvideBarcode: Please provide a barcode
+ProvideBarcode: Please provide a correct barcode
 BarcodeNotBev: This barcode is no product, but a user
 BarcodeUnknown: This barcode is unknown
 BarcodeField: Barcodes