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//
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// RouteComposer
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// StepChainAssembly.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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/// Helper class to build a chain of steps. Can not be used directly.
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public struct StepChainAssembly<ViewController: UIViewController, Context> {
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// MARK: Properties
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let previousSteps: [RoutingStep]
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// MARK: Methods
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init(previousSteps: [RoutingStep]) {
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self.previousSteps = previousSteps
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}
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/// Adds a single step to the chain
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///
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/// - Parameter previousStep: The instance of `StepWithActionAssemblable`
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public func from(_ step: ActionToStepIntegrator<some UIViewController, Context>) -> ActionConnectingAssembly<ViewController, Context> {
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ActionConnectingAssembly<ViewController, Context>(stepToFullFill: step, previousSteps: previousSteps)
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}
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/// Adds a `DestinationStep` to the chain. This step will be the last one in the chain.
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///
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/// - Parameter previousStep: The instance of `DestinationStep`
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public func from(_ step: DestinationStep<some UIViewController, Context>) -> LastStepInChainAssembly<ViewController, Context> {
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var previousSteps = previousSteps
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previousSteps.append(step)
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return LastStepInChainAssembly<ViewController, Context>(previousSteps: previousSteps)
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}
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/// Assembles all the provided settings.
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///
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/// - Parameter step: An instance of `DestinationStep` to start to build a current step from.
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/// - Returns: An instance of `DestinationStep` with all the provided settings inside.
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public func assemble(from step: DestinationStep<some UIViewController, Context>) -> DestinationStep<ViewController, Context> {
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var previousSteps = previousSteps
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previousSteps.append(step)
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return LastStepInChainAssembly<ViewController, Context>(previousSteps: previousSteps).assemble()
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}
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}
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