2021-11-23 08:35:32 +00:00
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// File created from SimpleUserProfileExample
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// $ createScreen.sh Spaces/SpaceCreation/SpaceCreationPostProcess SpaceCreationPostProcess
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//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import SwiftUI
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import Combine
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@available(iOS 14, *)
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typealias SpaceCreationPostProcessViewModelType = StateStoreViewModel<SpaceCreationPostProcessViewState,
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SpaceCreationPostProcessStateAction,
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SpaceCreationPostProcessViewAction>
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@available(iOS 14, *)
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class SpaceCreationPostProcessViewModel: SpaceCreationPostProcessViewModelType, SpaceCreationPostProcessViewModelProtocol {
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// MARK: - Properties
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// MARK: Private
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private let spaceCreationPostProcessService: SpaceCreationPostProcessServiceProtocol
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private var updateNotificationObserver: Any?
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// MARK: Public
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var completion: ((SpaceCreationPostProcessViewModelResult) -> Void)?
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// MARK: - Setup
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static func makeSpaceCreationPostProcessViewModel(spaceCreationPostProcessService: SpaceCreationPostProcessServiceProtocol) -> SpaceCreationPostProcessViewModelProtocol {
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return SpaceCreationPostProcessViewModel(spaceCreationPostProcessService: spaceCreationPostProcessService)
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}
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private init(spaceCreationPostProcessService: SpaceCreationPostProcessServiceProtocol) {
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self.spaceCreationPostProcessService = spaceCreationPostProcessService
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super.init(initialViewState: Self.defaultState(spaceCreationPostProcessService: spaceCreationPostProcessService))
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setupTasksObserving()
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}
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private static func defaultState(spaceCreationPostProcessService: SpaceCreationPostProcessServiceProtocol) -> SpaceCreationPostProcessViewState {
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let tasks = spaceCreationPostProcessService.tasksSubject.value
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return SpaceCreationPostProcessViewState(
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2021-12-01 22:56:59 +00:00
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avatar: spaceCreationPostProcessService.avatar,
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avatarImage: spaceCreationPostProcessService.avatarImage,
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2021-11-23 08:35:32 +00:00
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tasks: tasks,
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isFinished: tasks.first?.state == .failure || tasks.reduce(true, { result, task in result && task.isFinished }),
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errorCount: tasks.reduce(0, { result, task in result + (task.state == .failure ? 1 : 0) })
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)
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}
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private func setupTasksObserving() {
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let tasksUpdatePublisher = spaceCreationPostProcessService.tasksSubject
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.map(SpaceCreationPostProcessStateAction.updateTasks)
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.eraseToAnyPublisher()
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dispatch(actionPublisher: tasksUpdatePublisher)
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updateNotificationObserver = NotificationCenter.default.addObserver(forName: SpaceCreationPostProcessViewModel.didUpdate, object: nil, queue: OperationQueue.main) { [weak self] notification in
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guard let self = self else {
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return
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}
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guard let state = notification.userInfo?[SpaceCreationPostProcessViewModel.newStateKey] as? SpaceCreationPostProcessViewState else {
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return
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}
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if state.isFinished && state.errorCount == 0 {
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guard let spaceId = self.spaceCreationPostProcessService.createdSpaceId else {
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self.cancel()
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return
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}
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self.done(spaceId: spaceId)
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}
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}
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}
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deinit {
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if let updateNotificationObserver = self.updateNotificationObserver {
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NotificationCenter.default.removeObserver(updateNotificationObserver)
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}
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}
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// MARK: - Public
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override func process(viewAction: SpaceCreationPostProcessViewAction) {
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switch viewAction {
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case .cancel:
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cancel()
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case .runTasks:
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runTasks()
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case .retry:
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runTasks()
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}
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}
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override class func reducer(state: inout SpaceCreationPostProcessViewState, action: SpaceCreationPostProcessStateAction) {
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switch action {
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case .updateTasks(let tasks):
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state.tasks = tasks
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state.isFinished = tasks.first?.state == .failure || tasks.reduce(true, { result, task in result && task.isFinished })
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state.errorCount = tasks.reduce(0, { result, task in result + (task.state == .failure ? 1 : 0) })
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}
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NotificationCenter.default.post(name: SpaceCreationPostProcessViewModel.didUpdate, object: nil, userInfo: [SpaceCreationPostProcessViewModel.newStateKey : state])
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UILog.debug("[SpaceCreationPostProcessViewModel] reducer with action \(action) produced state: \(state)")
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}
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private func done(spaceId: String) {
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completion?(.done(spaceId))
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}
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private func cancel() {
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completion?(.cancel)
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}
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private func runTasks() {
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spaceCreationPostProcessService.run()
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}
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}
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// MARK: - MXSpaceService notification constants
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@available(iOS 14, *)
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extension SpaceCreationPostProcessViewModel {
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/// Posted once the process is finished
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public static let didUpdate = Notification.Name("SpaceCreationPostProcessViewModelDidUpdate")
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public static let newStateKey = "newState"
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}
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