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|
module ServerCommunication
( Communication(..)
, sendRequest
, serverCommunications
) where
import Signal
import Task as Task exposing (Task)
import Http
import Json.Decode exposing (..)
import Date
import Model.Message exposing (messageDecoder)
import Model.User exposing (UserId)
import Model.Payment exposing (..)
import Model.View.LoggedIn.Add exposing (Frequency(..))
import Update as U
import Update.SignIn exposing (..)
import Update.LoggedIn as UL
import Update.LoggedIn.Monthly as UM
type Communication =
NoCommunication
| SignIn String
| AddPayment UserId String Int
| AddMonthlyPayment String Int
| DeletePayment PaymentId UserId Int Int
| DeleteMonthlyPayment PaymentId
| UpdatePage Int
| SignOut
serverCommunications : Signal.Mailbox Communication
serverCommunications = Signal.mailbox NoCommunication
sendRequest : Communication -> Task Http.RawError U.Action
sendRequest communication =
case getRequest communication of
Nothing ->
Task.succeed U.NoOp
Just request ->
Http.send Http.defaultSettings request
|> flip Task.andThen (serverResult communication)
getRequest : Communication -> Maybe Http.Request
getRequest communication =
case communication of
NoCommunication -> Nothing
SignIn login -> Just (simple "post" ("/signIn?login=" ++ login))
AddPayment userId name cost -> Just (addPaymentRequest name cost Punctual)
AddMonthlyPayment name cost -> Just (addPaymentRequest name cost Monthly)
DeletePayment paymentId _ _ _ -> Just (deletePaymentRequest paymentId)
DeleteMonthlyPayment paymentId -> Just (deletePaymentRequest paymentId)
UpdatePage page -> Just (updatePageRequest page)
SignOut -> Just (simple "post" "/signOut")
addPaymentRequest : String -> Int -> Frequency -> Http.Request
addPaymentRequest name cost frequency =
simple "post" ("/payment/add?name=" ++ name ++ "&cost=" ++ (toString cost) ++ "&frequency=" ++ (toString frequency))
deletePaymentRequest : PaymentId -> Http.Request
deletePaymentRequest id =
simple "post" ("payment/delete?id=" ++ (toString id))
updatePageRequest : Int -> Http.Request
updatePageRequest page =
simple "get" ("payments?page=" ++ toString page ++ "&perPage=" ++ toString perPage)
simple : String -> String -> Http.Request
simple method url =
{ verb = method
, headers = []
, url = url
, body = Http.empty
}
serverResult : Communication -> Http.Response -> Task Http.RawError U.Action
serverResult communication response =
case response.status of
200 ->
case communication of
NoCommunication ->
Task.succeed U.NoOp
SignIn login ->
Task.succeed << U.UpdateSignIn <| ValidLogin login
AddPayment userId name cost ->
Http.send Http.defaultSettings (updatePageRequest 1)
|> flip Task.andThen (decodeOkResponse paymentsDecoder (\payments ->
Task.succeed <| U.UpdateLoggedIn (UL.AddPayment userId name cost payments)
))
AddMonthlyPayment name cost ->
decodeOkResponse
("id" := paymentIdDecoder)
(\id -> Task.succeed <| U.UpdateLoggedIn (UL.AddMonthlyPayment id name cost))
response
DeletePayment id userId cost currentPage ->
Http.send Http.defaultSettings (updatePageRequest currentPage)
|> flip Task.andThen (decodeOkResponse paymentsDecoder (\payments ->
Task.succeed <| U.UpdateLoggedIn (UL.DeletePayment userId cost payments)
))
DeleteMonthlyPayment id ->
Task.succeed <| U.UpdateLoggedIn (UL.UpdateMonthly (UM.DeletePayment id))
UpdatePage page ->
decodeOkResponse
paymentsDecoder
(\payments -> Task.succeed <| U.UpdateLoggedIn (UL.UpdatePage page payments))
response
SignOut ->
Task.succeed (U.GoSignInView)
errorStatus ->
decodeResponse
messageDecoder
(\error ->
case communication of
SignIn _ ->
Task.succeed <| U.UpdateSignIn (ErrorLogin error)
_ ->
Task.succeed <| U.NoOp
)
response
decodeOkResponse : Decoder a -> (a -> Task b U.Action) -> Http.Response -> Task b U.Action
decodeOkResponse decoder responseToAction response =
if response.status == 200
then decodeResponse decoder responseToAction response
else Task.succeed U.NoOp
decodeResponse : Decoder a -> (a -> Task b U.Action) -> Http.Response -> Task b U.Action
decodeResponse decoder responseToAction response =
case response.value of
Http.Text text ->
case decodeString decoder text of
Ok x ->
responseToAction x
Err _ ->
Task.succeed U.NoOp
Http.Blob _ ->
Task.succeed U.NoOp
|
