added iOS source code

[wl-app.git] / iOS / Pods / Kingfisher / Sources / RequestModifier.swift

diff --git a/iOS/Pods/Kingfisher/Sources/RequestModifier.swift b/iOS/Pods/Kingfisher/Sources/RequestModifier.swift
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+++ b/iOS/Pods/Kingfisher/Sources/RequestModifier.swift
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+//
+//  RequestModifier.swift
+//  Kingfisher
+//
+//  Created by Wei Wang on 2016/09/05.
+//
+//  Copyright (c) 2018 Wei Wang <onevcat@gmail.com>
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+/// Request modifier of image downloader.
+public protocol ImageDownloadRequestModifier {
+    func modified(for request: URLRequest) -> URLRequest?
+}
+
+struct NoModifier: ImageDownloadRequestModifier {
+    static let `default` = NoModifier()
+    private init() {}
+    func modified(for request: URLRequest) -> URLRequest? {
+        return request
+    }
+}
+
+public struct AnyModifier: ImageDownloadRequestModifier {
+    
+    let block: (URLRequest) -> URLRequest?
+    
+    public func modified(for request: URLRequest) -> URLRequest? {
+        return block(request)
+    }
+    
+    public init(modify: @escaping (URLRequest) -> URLRequest? ) {
+        block = modify
+    }
+}