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|
{-# LANGUAGE OverloadedStrings #-}
module Model.Payment
( getPayments
, getMonthlyPayments
, createPayment
, deleteOwnPayment
) where
import Data.Text (Text)
import Data.Time.Clock (getCurrentTime)
import Data.Either (lefts)
import Control.Monad.IO.Class (liftIO)
import Database.Persist
import qualified Validation
import Model.Database
import Model.Frequency
import qualified Model.Json.Payment as P
import qualified Model.Message.Key as K
getPayments :: Persist [P.Payment]
getPayments =
map getJsonPayment <$> selectList
[ PaymentDeletedAt ==. Nothing ]
[ Desc PaymentCreation ]
getMonthlyPayments :: Persist [Entity Payment]
getMonthlyPayments =
selectList
[ PaymentDeletedAt ==. Nothing
, PaymentFrequency ==. Monthly
]
[ Desc PaymentName ]
getJsonPayment :: Entity Payment -> P.Payment
getJsonPayment paymentEntity =
let payment = entityVal paymentEntity
in P.Payment
{ P.id = entityKey paymentEntity
, P.creation = paymentCreation payment
, P.name = paymentName payment
, P.cost = paymentCost payment
, P.userId = paymentUserId payment
, P.frequency = paymentFrequency payment
}
createPayment :: UserId -> Text -> Text -> Frequency -> Persist (Either [(Text, K.Key)] PaymentId)
createPayment userId name cost frequency =
case validatePayment name cost of
Left err ->
return . Left $ err
Right (validatedName, validatedCost) -> do
now <- liftIO getCurrentTime
Right <$> insert (Payment userId now validatedName validatedCost Nothing frequency)
validatePayment :: Text -> Text -> Either [(Text, K.Key)] (Text, Int)
validatePayment name cost =
let eitherName = Validation.nonEmpty K.CategoryRequired name
eitherCost = Validation.nonEmpty K.CostRequired cost >>= Validation.number K.CostRequired (/= 0)
in case (eitherName, eitherCost) of
(Right validatedName, Right validatedCost) ->
Right (validatedName, validatedCost)
_ ->
let nameErrors = map (\x -> ("name", x)) $ lefts [eitherName]
costErrors = map (\x -> ("cost", x)) $ lefts [eitherCost]
in Left (nameErrors ++ costErrors)
deleteOwnPayment :: Entity User -> PaymentId -> Persist Bool
deleteOwnPayment user paymentId = do
mbPayment <- get paymentId
case mbPayment of
Just payment ->
if paymentUserId payment == entityKey user
then do
now <- liftIO getCurrentTime
update paymentId [PaymentDeletedAt =. Just now]
return True
else
return False
Nothing ->
return False
|
