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//
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// RouteComposer
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// InterceptorMultiplexer.swift
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// https://github.com/ekazaev/route-composer
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//
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// Created by Eugene Kazaev in 2018-2022.
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// Distributed under the MIT license.
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//
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// Become a sponsor:
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// https://github.com/sponsors/ekazaev
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//
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import Foundation
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struct InterceptorMultiplexer: AnyRoutingInterceptor, MainThreadChecking, CustomStringConvertible {
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private var interceptors: [AnyRoutingInterceptor]
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init(_ interceptors: [AnyRoutingInterceptor]) {
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self.interceptors = interceptors
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}
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mutating func prepare(with context: AnyContext) throws {
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interceptors = try interceptors.map {
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var interceptor = $0
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try interceptor.prepare(with: context)
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return interceptor
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}
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}
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func perform(with context: AnyContext, completion: @escaping (RoutingResult) -> Void) {
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guard !self.interceptors.isEmpty else {
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completion(.success)
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return
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}
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var interceptors = interceptors
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func runInterceptor(interceptor: AnyRoutingInterceptor) {
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assertIfNotMainThread()
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interceptor.perform(with: context) { result in
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self.assertIfNotMainThread()
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if case .failure = result {
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completion(result)
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} else if interceptors.isEmpty {
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completion(result)
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} else {
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runInterceptor(interceptor: interceptors.removeFirst())
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}
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}
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}
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runInterceptor(interceptor: interceptors.removeFirst())
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}
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var description: String {
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String(describing: interceptors)
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}
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}
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