ReSwiftThunk

A thunk middleware for ReSwift.

⚠️ ReSwift now has a first-party version of thunk middelware. I recommend using the new version as it will be more actively maintained.

Installation

Cocoapods

pod 'ReSwiftThunk', '~> 1.0'

Carthage

github "mikecole20/ReSwiftThunk" ~> 1.0

Usage

Include the ThunkMiddleware when you create your ReSwift store.

let mainStore = Store<AppState>(
    reducer: AppReducer(),
    state: nil,
    middleware: [ThunkMiddleware()]
)

Extend ThunkAction to define your asynchronous actions. Usually, they will dispatch regular Actions inside. I like to use functions to create the ThunkAction.

struct ActionResetPassword: Action {
}

struct ActionResetPasswordSuccess: Action {
}

struct ActionResetPasswordFailure: Action {
    var error: Error
}

public func resetPassword(email: String) -> ThunkAction {
    return ThunkAction(
        action: { (dispatch, getState) in
            _ = dispatch(ActionRestPassword())

            let result = self.bellhopsSessionManager.request(Router.resetPassword(email: email)).validate().responseJSON()

            return result.then { resp -> Any in
                _ = dispatch(ActionResetPasswordSuccess())
                return resp
            }.recover { error -> Any in
                _ = dispatch(ActionResetPasswordFailure(error: error))
                throw error
            }
        }
    )
}

Note that in this example, I am using PromiseKit so that the action returns a promise. This makes side effects in your views easy.

Then dispatch the ThunkAction.

let action = resetPassword(email: "[email protected]")
let result = mainStore.dispatch(action)
if let promise = result as? Promise<Any> {
    promise.then { resp -> Void in
        print("success")
    }.catch { error in
        print("failure")
    }
}
mainStore.dispatch

Once again, this example is using promises. You can return anything you want though, because ReSwift only requires a return of Any.