113 lines
4.8 KiB
Swift
113 lines
4.8 KiB
Swift
//
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// AsyncHomeTimelineViewModel+LoadMiddleState.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-6-21.
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//
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#if ASDK
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import os.log
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import Foundation
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import GameplayKit
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import CoreData
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import CoreDataStack
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extension AsyncHomeTimelineViewModel {
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class LoadMiddleState: GKState {
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weak var viewModel: AsyncHomeTimelineViewModel?
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let upperTimelineIndexObjectID: NSManagedObjectID
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init(viewModel: AsyncHomeTimelineViewModel, upperTimelineIndexObjectID: NSManagedObjectID) {
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self.viewModel = viewModel
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self.upperTimelineIndexObjectID = upperTimelineIndexObjectID
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}
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override func didEnter(from previousState: GKState?) {
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os_log("%{public}s[%{public}ld], %{public}s: enter %s, previous: %s", ((#file as NSString).lastPathComponent), #line, #function, self.debugDescription, previousState.debugDescription)
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guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
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var dict = viewModel.loadMiddleSateMachineList.value
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dict[upperTimelineIndexObjectID] = stateMachine
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viewModel.loadMiddleSateMachineList.value = dict // trigger value change
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}
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}
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}
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extension AsyncHomeTimelineViewModel.LoadMiddleState {
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class Initial: AsyncHomeTimelineViewModel.LoadMiddleState {
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override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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return stateClass == Loading.self
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}
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}
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class Loading: AsyncHomeTimelineViewModel.LoadMiddleState {
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override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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// guard let viewModel = viewModel else { return false }
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return stateClass == Success.self || stateClass == Fail.self
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}
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override func didEnter(from previousState: GKState?) {
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super.didEnter(from: previousState)
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guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
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guard let activeMastodonAuthenticationBox = viewModel.context.authenticationService.activeMastodonAuthenticationBox.value else {
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stateMachine.enter(Fail.self)
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return
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}
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guard let timelineIndex = (viewModel.fetchedResultsController.fetchedObjects ?? []).first(where: { $0.objectID == upperTimelineIndexObjectID }) else {
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stateMachine.enter(Fail.self)
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return
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}
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let statusIDs = (viewModel.fetchedResultsController.fetchedObjects ?? []).compactMap { timelineIndex in
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timelineIndex.status.id
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}
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// TODO: only set large count when using Wi-Fi
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let maxID = timelineIndex.status.id
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viewModel.context.apiService.homeTimeline(domain: activeMastodonAuthenticationBox.domain,maxID: maxID, authorizationBox: activeMastodonAuthenticationBox)
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.delay(for: .seconds(1), scheduler: DispatchQueue.main)
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.receive(on: DispatchQueue.main)
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.sink { completion in
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viewModel.homeTimelineNavigationBarTitleViewModel.receiveLoadingStateCompletion(completion)
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switch completion {
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case .failure(let error):
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// TODO: handle error
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os_log("%{public}s[%{public}ld], %{public}s: fetch statuses failed. %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
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stateMachine.enter(Fail.self)
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case .finished:
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break
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}
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} receiveValue: { response in
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let statuses = response.value
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let newStatuses = statuses.filter { !statusIDs.contains($0.id) }
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os_log("%{public}s[%{public}ld], %{public}s: load %{public}ld statuses, %{public}%ld new statuses", ((#file as NSString).lastPathComponent), #line, #function, statuses.count, newStatuses.count)
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if newStatuses.isEmpty {
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stateMachine.enter(Fail.self)
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} else {
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stateMachine.enter(Success.self)
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}
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}
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.store(in: &viewModel.disposeBag)
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}
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}
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class Fail: AsyncHomeTimelineViewModel.LoadMiddleState {
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override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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// guard let viewModel = viewModel else { return false }
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return stateClass == Loading.self
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}
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}
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class Success: AsyncHomeTimelineViewModel.LoadMiddleState {
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override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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// guard let viewModel = viewModel else { return false }
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return false
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}
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}
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}
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#endif
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