mastodon-ios/Mastodon/Scene/Notification/NotificationViewModel+LoadL...

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//
// NotificationViewModel+LoadLatestState.swift
// Mastodon
//
// Created by sxiaojian on 2021/4/13.
//
import CoreData
import CoreDataStack
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import Foundation
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import GameplayKit
import MastodonSDK
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import os.log
import func QuartzCore.CACurrentMediaTime
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extension NotificationViewModel {
class LoadLatestState: GKState {
weak var viewModel: NotificationViewModel?
init(viewModel: NotificationViewModel) {
self.viewModel = viewModel
}
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, debugDescription, previousState.debugDescription)
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viewModel?.loadLatestStateMachinePublisher.send(self)
}
}
}
extension NotificationViewModel.LoadLatestState {
class Initial: NotificationViewModel.LoadLatestState {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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stateClass == Loading.self
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}
}
class Loading: NotificationViewModel.LoadLatestState {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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stateClass == Fail.self || stateClass == Idle.self
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}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
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guard let activeMastodonAuthenticationBox = viewModel.activeMastodonAuthenticationBox.value else {
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// sign out when loading will enter here
stateMachine.enter(Fail.self)
return
}
let query = Mastodon.API.Notifications.Query(
maxID: nil,
sinceID: nil,
minID: nil,
limit: nil,
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excludeTypes: [.followRequest],
accountID: nil
)
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viewModel.context.apiService.allNotifications(
domain: activeMastodonAuthenticationBox.domain,
query: query,
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mastodonAuthenticationBox: activeMastodonAuthenticationBox
)
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.sink { completion in
switch completion {
case .failure(let error):
viewModel.isFetchingLatestNotification.value = false
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: fetch notification failed. %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
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case .finished:
// handle isFetchingLatestTimeline in fetch controller delegate
break
}
stateMachine.enter(Idle.self)
} receiveValue: { response in
if response.value.isEmpty {
viewModel.isFetchingLatestNotification.value = false
}
}
.store(in: &viewModel.disposeBag)
}
}
class Fail: NotificationViewModel.LoadLatestState {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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stateClass == Loading.self || stateClass == Idle.self
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}
}
class Idle: NotificationViewModel.LoadLatestState {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
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stateClass == Loading.self
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}
}
}