medium_dispatcher_3.swift

struct HTTPDispatcher: Dispatcher {
    func execute(request: URLRequest, success: (Data) -> Void, failure: (Error) -> Void) {
        // executes HTTP requests using URLSession
        // …
    }
}

struct TestHTTPDispatcher: Dispatcher {
    func execute(request: URLRequest, success: (Data) -> Void, failure: (Error) -> Void) {
        // to be used for unit tests, returns mocked data
        // …
    }
}

struct GraphQLDispatcher: Dispatcher {
    func execute(request: GraphQLQuery, success: (GraphQLQuery.Data) -> Void, error: (Error) -> Void) {
        // Uses graphql lib to load data from server
    }
}