89 lines
2.5 KiB
Swift
89 lines
2.5 KiB
Swift
//
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// NotificationViewModel.swift
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// Mastodon
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//
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// Created by sxiaojian on 2021/4/12.
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//
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import UIKit
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import Combine
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import Pageboy
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import MastodonAsset
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import MastodonCore
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import MastodonLocalization
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final class NotificationViewModel {
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var disposeBag = Set<AnyCancellable>()
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// input
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let context: AppContext
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let authContext: AuthContext
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let viewDidLoad = PassthroughSubject<Void, Never>()
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// output
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let scopes = NotificationTimelineViewModel.Scope.allCases
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@Published var viewControllers: [UIViewController] = []
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@Published var currentPageIndex = 0 {
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didSet {
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lastPageIndex = currentPageIndex
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}
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}
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private var lastPageIndex: Int {
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get {
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UserDefaults.shared.getLastSelectedNotificationsTab(
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accessToken: authContext.mastodonAuthenticationBox.userAuthorization.accessToken
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)
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}
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set {
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UserDefaults.shared.setLastSelectedNotificationsTab(
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accessToken: authContext.mastodonAuthenticationBox.userAuthorization.accessToken,
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value: newValue
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)
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}
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}
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init(context: AppContext, authContext: AuthContext) {
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self.context = context
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self.authContext = authContext
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// end init
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}
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}
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extension NotificationTimelineViewModel.Scope {
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var title: String {
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switch self {
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case .everything:
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return L10n.Scene.Notification.Title.everything
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case .mentions:
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return L10n.Scene.Notification.Title.mentions
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}
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}
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}
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// MARK: - PageboyViewControllerDataSource
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extension NotificationViewModel: PageboyViewControllerDataSource {
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func numberOfViewControllers(in pageboyViewController: PageboyViewController) -> Int {
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return viewControllers.count
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}
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func viewController(for pageboyViewController: PageboyViewController, at index: PageboyViewController.PageIndex) -> UIViewController? {
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return viewControllers[index]
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}
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func defaultPage(for pageboyViewController: PageboyViewController) -> PageboyViewController.Page? {
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guard
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let pageCount = pageboyViewController.pageCount,
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pageCount > 1,
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(0...(pageCount - 1)).contains(lastPageIndex)
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else {
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return .first /// this should never happen, but in case we somehow manage to acquire invalid data in `lastPageIndex` let's make sure not to crash the app.
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}
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return .at(index: lastPageIndex)
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}
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}
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