module Handler.Journal where import Import as I import Data.List as L import Handler.Common getJournalR :: Handler Html getJournalR = do master <- getYesod rawEntries <- runDB $ selectList [] [Desc TransactionId, LimitTo 30] entries <- return $ L.reverse rawEntries total <- return $ L.sum $ I.map (transactionAmount . entityVal) entries timeLimit <- return $ transactionTime $ entityVal $ L.last $ entries cashiers <- runDB $ selectList [CashierCreated <=. timeLimit] [Asc CashierId] list <- return $ merge entries cashiers cashBalance <- getCashierBalance defaultLayout $ do $(widgetFile "journal") merge :: [Entity Transaction] -> [Entity Cashier] -> [Either Transaction Cashier] merge [] [] = [] merge (t:ts) [] = (Left $ entityVal t) : merge ts [] merge (t:ts) (c:cs) | transactionTime (entityVal t) < cashierCreated (entityVal c) = (Left $ entityVal t) : merge ts (c:cs) | transactionTime (entityVal t) > cashierCreated (entityVal c) = (Right $ entityVal c) : merge (t:ts) cs