Porter

Port message manager to emulate a request-response style communication through ports, a'la Http.send ResponseHandler request.

Configuration

type alias Config req res msg =

Config req res msg

Porter configuration, containing:

type Model req res msg

Porter model, used to keep track of response handlers.

type alias Msg req res msg =

Msg req res msg

Module messages.

init : Model req res msg

Initialize model.

Config req res msg

-> Msg req res msg

-> Model req res msg

-> ( Model req res msg, Cmd msg )

Update port model based on local messages. Returns a new port model and a local command that must be mapped to the parent message.

subscriptions : Config req res msg -> Sub msg

Subscribe to messages from ports.

type alias Request req res =

Request req res

Opaque type of a 'request'. Use the request function to create one, chain them using andThen and finally send it using send.

request : req -> Request req res

Starts a request that can be sent at a later time using send, and that can be combined using andThen.

andThen : (res -> Request req res) -> Request req res -> Request req res

Chains two Porter requests together: Run a second one right away when the first returns using its result in the request.

send : Config req res msg -> (res -> msg) -> Request req res -> Cmd msg

Sends a request earlier started using request.