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|
module Model.Payment
( perPage
, Payments
, Payment
, PaymentId
, paymentsDecoder
, paymentIdDecoder
, deletePayment
, PaymentFrequency(..)
, totalPayments
) where
import Date exposing (..)
import Json.Decode as Json exposing ((:=))
import Model.User exposing (UserId, userIdDecoder)
import Model.Date exposing (dateDecoder)
perPage : Int
perPage = 8
type alias Payments = List Payment
type alias Payment =
{ id : PaymentId
, creation : Date
, name : String
, cost : Int
, userId : UserId
}
type alias PaymentId = Int
type PaymentFrequency = Punctual | Monthly
paymentsDecoder : Json.Decoder Payments
paymentsDecoder = Json.list paymentDecoder
paymentDecoder : Json.Decoder Payment
paymentDecoder =
Json.object5 Payment
("id" := paymentIdDecoder)
("creation" := dateDecoder)
("name" := Json.string)
("cost" := Json.int)
("userId" := userIdDecoder)
paymentIdDecoder : Json.Decoder PaymentId
paymentIdDecoder = Json.int
deletePayment : PaymentId -> Payments -> Payments
deletePayment paymentId = List.filter (((/=) paymentId) << .id)
totalPayments : (Payment -> Bool) -> UserId -> Payments -> Int
totalPayments paymentFilter userId payments =
payments
|> List.filter (\payment -> paymentFilter payment && payment.userId == userId)
|> List.map .cost
|> List.sum
|
