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protocol RequestType {
associatedtype ResponseType
var baseURL: String { get }
var method: HTTPMethod { get }
var path: String { get }
var parameters: [String: AnyObject] { get }
var headers: [String: String] { get }
/* HTTPのResponse Bodyからオブジェクトを返す */
func responseFromObject(_ object: Data) -> ResponseType?
}
extension RequestType {
var baseURL: String { return "https://..." }
var headers: [String: String] { return [:] }
var parameters: [String: AnyObject] { return [:] }
var URL: String { return self.baseURL + self.path }
}
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class APIClient {
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
Alamofire.request(request.URL,
method: request.method,
parameters: request.parameters,
headers: request.headers).responseData { response in
switch response.result {
case .success(let value):
guard let responseData = request.responseFromObject(value) else {
return completion(Result.failure(/* fail to parse error */))
}
return completion(Result.success(responseData))
case .failure(let error):
return completion(Result.failure(error))
}
}
}
}
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class APIClient {
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
Alamofire.request(request.URL,
method: request.method,
parameters: request.parameters,
headers: request.headers).responseData { response in
switch response.result {
case .success(let value):
guard let responseData = request.responseFromObject(value) else {
return completion(Result.failure(/* fail to parse error */))
}
return completion(Result.success(responseData))
case .failure(let error):
return completion(Result.failure(error))
}
}
}
}
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struct GetUserRequest: RequestType {
typealias ResponseType = User
let id: String
var path: String {
return "/v1/user/\(self.id)"
}
var method: HTTPMethod {
return .get
}
func responseFromObject(_ object: Data) -> User? {
return User(object)
}
}
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APIClient().sendRequest(GetUserRequest(id: "id")) { result in
switch result {
case .success(let user):
/* success handler */
break
case .failure(let error):
/* error handler */
break
}
}
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protocol RequestCacheable {
associatedtype ResponseType
/**
* キャッシュ有効フラグ
*/
var cacheEnabled: Bool { get }
/**
* キャッシュが存在する場合、ResponseTypeを返す
*/
func cache() -> ResponseType?
}
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struct GetUserRequest: RequestType, RequestCacheable {
typealias ResponseType = User
let id: String
var cacheEnabled = true
var path: String {
return "/v1/user/\(self.id)"
}
var method: HTTPMethod {
return .get
}
func responseFromObject(_ object: Data) -> User? {
return User(object)
}
func cache() -> User? {
/* Realmなどを利用する */
return CacheManger.shared.fetch(self.id) as? User
}
}
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class APIClient {
private func performRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* Alamofireでリクエストを送る */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
self.performRequest(request, completion: completion)
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
if request.cacheEnabled {
if let data = request.cache() {
return completion(Result.success(data))
}
}
self.performRequest(request, completion: completion)
}
}
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class APIClient {
private func performRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* Alamofireでリクエストを送る */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
self.performRequest(request, completion: completion)
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
if request.cacheEnabled {
if let data = request.cache() {
return completion(Result.success(data))
}
}
self.performRequest(request, completion: completion)
}
}
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class APIClient {
private func performRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* Alamofireでリクエストを送る */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
self.performRequest(request, completion: completion)
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
if request.cacheEnabled {
if let data = request.cache() {
return completion(Result.success(data))
}
}
self.performRequest(request, completion: completion)
}
}
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APIClient().sendRequest(GetUserRequest(id: "id", cacheEnabled: true)) { result in
switch result {
case .success(let user):
/* success handler */
break
case .failure(let error):
/* error handler */
break
}
}
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protocol RequestRetryable {
/**
* リトライする回数
*/
var retryCount: Int { get }
/**
* リトライするかどうかを判定する
*/
func canRetry(error: Error) -> Bool
}
extension RequestRetryable {
var retryCount: Int { return 3 }
}
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struct GetKeywordListRequest: RequestType, RequestCacheable, RequestRetryable {
typealias ResponseType = KeywordList
var cacheEnabled: Bool = false
var retryCount: Int {
return 4
}
var path: String {
return "/v1/keywords"
}
var method: HTTPMethod {
return .get
}
func responseFromObject(_ object: Data) -> KeywordList? {
return KeywordList(object)
}
func canRetry(error: Error) -> Bool {
return /* conditions of retry */ ? true : false
}
func cache() -> KeywordList? {
return CacheManger.shared.fetch("keywords") as? KeywordList
}
}
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class APIClient {
private func performRetryableRequest(
_ request: T, retryCounter: Int = 0,
completion: @escaping (Result) -> Void) {
Alamofire.request(request.URL, method: request.method,
parameters: request.parameters,
headers: request.headers).responseData { response in
switch response.result {
case .success(let value):
guard let responseData = request.responseFromObject(value) else {
return completion(Result.failure(/* fail to parse error */))
}
return completion(Result.success(responseData))
case .failure(let error):
if request.retryCount > retryCounter && request.canRetry(error: error) {
return self.performRetryableRequest(request,
retryCounter: retryCounter + 1,
completion: completion)
}
return completion(Result.failure(error))
}
}
}
...
,BCV[J;B5FDITXJGU
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class APIClient {
private func performRetryableRequest(
_ request: T, retryCounter: Int = 0,
completion: @escaping (Result) -> Void) {
Alamofire.request(request.URL, method: request.method,
parameters: request.parameters,
headers: request.headers).responseData { response in
switch response.result {
case .success(let value):
guard let responseData = request.responseFromObject(value) else {
return completion(Result.failure(/* fail to parse error */))
}
return completion(Result.success(responseData))
case .failure(let error):
if request.retryCount > retryCounter && request.canRetry(error: error) {
return self.performRetryableRequest(request,
retryCounter: retryCounter + 1,
completion: completion)
}
return completion(Result.failure(error))
}
}
}
...
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class APIClient {
...
private func performCachedRequest(
_ request: T) -> T.ResponseType? {
guard request.cacheEnabled else {
return nil
}
return request.cache()
}
...
,BCV[J;B5FDITXJGU
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class APIClient {
...
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* performRequest */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* performCachedRequest & performRequest */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* performRetryableRequest */
}
func sendRequest(_ request: T,
completion: @escaping (Result) -> Void) {
/* performCachedRequest & performRetryableRequest */
}
}
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APIClient().sendRequest(GetKeywordListRequest()) { result in
switch result {
case .success(let keywordList):
/* success handler */
break
case .failure(let error):
/* error handler */
break
}
}
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