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module Model.Payment
( perPage
, Payments
, Payment
, PaymentId
, PaymentWithId
, paymentsDecoder
, removePayment
) where
import Date exposing (..)
import Json.Decode as Json exposing ((:=))
import Dict exposing (..)
import Model.User exposing (UserId, userIdDecoder)
perPage : Int
perPage = 8
type alias Payments = Dict PaymentId Payment
type alias PaymentWithId = (PaymentId, Payment)
type alias Payment =
{ creation : Date
, name : String
, cost : Int
, userId : UserId
}
type alias PaymentId = Int
paymentsDecoder : Json.Decoder Payments
paymentsDecoder = Json.map Dict.fromList (Json.list paymentWithIdDecoder)
paymentWithIdDecoder : Json.Decoder (PaymentId, Payment)
paymentWithIdDecoder =
paymentDecoder `Json.andThen` (\payment -> Json.map (\id -> (id, payment)) ("id" := paymentIdDecoder))
paymentDecoder : Json.Decoder Payment
paymentDecoder =
Json.object4 Payment
("creation" := dateDecoder)
("name" := Json.string)
("cost" := Json.int)
("userId" := userIdDecoder)
paymentIdDecoder : Json.Decoder PaymentId
paymentIdDecoder = Json.int
dateDecoder : Json.Decoder Date
dateDecoder = Json.customDecoder Json.string Date.fromString
removePayment : Payments -> PaymentId -> Payments
removePayment payments paymentId = Dict.remove paymentId payments
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