Promises+Moya+Codable.swift

public extension MoyaProvider {
	public func request(_ target: Target,
						  callbackQueue: DispatchQueue? = nil,
						  progress: ProgressBlock? = nil) -> Promise<Moya.Response> {
		return Promise { [weak self] fulfill, reject in
			self?.request(
				target,
				callbackQueue: callbackQueue,
				progress: progress,
				completion: self?.completion(for: fulfill, reject: reject) ?? {_ in }
			)
		}
	}


	private func completion(for fulfill: @escaping (Moya.Response) -> Void,
							reject: @escaping (Swift.Error) -> Void) -> Moya.Completion {
		return { result in
			switch result {
			case let .success(response):
				fulfill(response)
			case let .failure(error):
				reject(error)
			}
		}
	}
}


public extension Promise where Value: Moya.Response {
	public func map<T: Decodable>(to: T.Type) -> Promise<T> {
		return self.then({ response in
			return try JSONDecoder().decode(T.self, from: response.data)
		})
	}
}