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//
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// RouteComposer
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// GlobalInterceptorRouter.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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import UIKit
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/// The `DefaultRouter` searches for the view controller as a starting point before it starts to run interceptors.
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/// Sometimes if interceptor can change the entire stack of view controllers it is handy to run a global interceptor
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/// any starting point is found. `GlobalInterceptorRouter` proxy allows to add such a global interceptor that will be
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/// executed before any work that `DefaultRouter` will do.
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public struct GlobalInterceptorRouter<R>: Router where R: Router {
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// MARK: Properties
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var router: R
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private var interceptors: [AnyRoutingInterceptor] = []
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// MARK: Methods
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/// Constructor
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///
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/// - Parameters:
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/// - router: `Router` instance to proxy.
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public init(router: R) {
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self.router = router
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}
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public func navigate<Context>(to step: DestinationStep<some UIViewController, Context>,
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with context: Context,
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animated: Bool,
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completion: ((RoutingResult) -> Void)?) throws {
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do {
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let interceptorRunner = try DefaultRouter.InterceptorRunner(interceptors: interceptors, with: AnyContextBox(context))
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interceptorRunner.perform(completion: { result in
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do {
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switch result {
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case .success:
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try router.navigate(to: step, with: context, animated: animated, completion: { result in
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completion?(result)
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})
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case let .failure(error):
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throw error
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}
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} catch {
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completion?(.failure(error))
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}
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})
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} catch {
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throw error
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}
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}
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/// Adds `RoutingInterceptor` instance to the `GlobalInterceptorRouter`
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///
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/// - Parameter interceptor: The `RoutingInterceptor` instance to be executed by `Router` before routing to this step.
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public mutating func addGlobal<RI: RoutingInterceptor>(_ interceptor: RI) where RI.Context == Any? {
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interceptors.append(RoutingInterceptorBox(interceptor))
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}
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}
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extension GlobalInterceptorRouter: InterceptableRouter where R: InterceptableRouter {
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public mutating func add<RI: RoutingInterceptor>(_ interceptor: RI) where RI.Context == Any? {
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router.add(interceptor)
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}
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public mutating func add<CT: ContextTask>(_ contextTask: CT) where CT.ViewController == UIViewController, CT.Context == Any? {
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router.add(contextTask)
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}
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public mutating func add<PT: PostRoutingTask>(_ postTask: PT) where PT.Context == Any? {
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router.add(postTask)
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}
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}
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