Kurdtvs-Live-Kurdish-TV-Kur.../Mastodon/Scene/Profile/Follower/FollowerListViewModel+State...

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//
// FollowerListViewModel+State.swift
// Mastodon
//
// Created by Cirno MainasuK on 2021-11-1.
//
import os.log
import Foundation
import GameplayKit
import MastodonSDK
extension FollowerListViewModel {
class State: GKState {
weak var viewModel: FollowerListViewModel?
init(viewModel: FollowerListViewModel) {
self.viewModel = viewModel
}
override func didEnter(from previousState: GKState?) {
os_log("%{public}s[%{public}ld], %{public}s: enter %s, previous: %s", ((#file as NSString).lastPathComponent), #line, #function, self.debugDescription, previousState.debugDescription)
}
}
}
extension FollowerListViewModel.State {
class Initial: FollowerListViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
guard let viewModel = viewModel else { return false }
switch stateClass {
case is Reloading.Type:
return viewModel.userID.value != nil
default:
return false
}
}
}
class Reloading: FollowerListViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Loading.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
// reset
viewModel.userFetchedResultsController.userIDs.value = []
stateMachine.enter(Loading.self)
}
}
class Fail: FollowerListViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Loading.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
guard let _ = viewModel, let stateMachine = stateMachine else { return }
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: retry loading 3s later…", ((#file as NSString).lastPathComponent), #line, #function)
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: retry loading", ((#file as NSString).lastPathComponent), #line, #function)
stateMachine.enter(Loading.self)
}
}
}
class Idle: FollowerListViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Reloading.Type, is Loading.Type:
return true
default:
return false
}
}
}
class Loading: FollowerListViewModel.State {
var maxID: String?
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Fail.Type:
return true
case is Idle.Type:
return true
case is NoMore.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
if previousState is Reloading {
maxID = nil
}
guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
guard let userID = viewModel.userID.value, !userID.isEmpty else {
stateMachine.enter(Fail.self)
return
}
guard let activeMastodonAuthenticationBox = viewModel.context.authenticationService.activeMastodonAuthenticationBox.value else {
stateMachine.enter(Fail.self)
return
}
viewModel.context.apiService.followers(
userID: userID,
maxID: maxID,
authorizationBox: activeMastodonAuthenticationBox
)
.receive(on: DispatchQueue.main)
.sink { completion in
switch completion {
case .failure(let error):
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: fetch user timeline fail: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
stateMachine.enter(Fail.self)
case .finished:
break
}
} receiveValue: { response in
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
var hasNewAppend = false
var userIDs = viewModel.userFetchedResultsController.userIDs.value
for user in response.value {
guard !userIDs.contains(user.id) else { continue }
userIDs.append(user.id)
hasNewAppend = true
}
let maxID = response.link?.maxID
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if hasNewAppend && maxID != nil {
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stateMachine.enter(Idle.self)
} else {
stateMachine.enter(NoMore.self)
}
self.maxID = maxID
viewModel.userFetchedResultsController.userIDs.value = userIDs
}
.store(in: &viewModel.disposeBag)
} // end func didEnter
}
class NoMore: FollowerListViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Reloading.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
}
}
}