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//
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// RouteComposer
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// ChildCoordinator.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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/// Helps to build a child view controller stack
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public struct ChildCoordinator {
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// MARK: Properties
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var childFactories: [(factory: PostponedIntegrationFactory, context: AnyContext)]
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/// Returns `true` if the coordinator contains child factories to build
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public var isEmpty: Bool {
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childFactories.isEmpty
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}
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// MARK: Methods
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init(childFactories: [(factory: PostponedIntegrationFactory, context: AnyContext)]) {
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self.childFactories = childFactories
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}
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/// Builds child view controller stack with the context instance provided.
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///
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/// - Parameters:
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/// - existingViewControllers: Current view controller stack of the container.
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/// - Returns: Built child view controller stack
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public func build(integrating existingViewControllers: [UIViewController] = []) throws -> [UIViewController] {
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var childrenViewControllers = existingViewControllers
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for factory in childFactories {
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try factory.factory.build(with: factory.context, in: &childrenViewControllers)
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}
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return childrenViewControllers
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}
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}
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