110 lines
3.5 KiB
Swift
110 lines
3.5 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Foundation
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import Combine
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class MainNavigationViewModel: ObservableObject {
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@Published private(set) var identity: Identity
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@Published private(set) var recentIdentities = [Identity]()
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@Published var presentingSettings = false
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@Published var alertItem: AlertItem?
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var selectedTab: Tab? = .timelines
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private let environment: AppEnvironment
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private let networkClient: MastodonClient
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private var cancellables = Set<AnyCancellable>()
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init(identityID: String, environment: AppEnvironment) throws {
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self.environment = environment
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networkClient = MastodonClient(configuration: environment.URLSessionConfiguration)
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let observation = environment.identityDatabase.identityObservation(id: identityID).share()
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var initialIdentity: Identity?
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observation.first().sink(
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receiveCompletion: { _ in },
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receiveValue: { initialIdentity = $0 })
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.store(in: &cancellables)
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guard let identity = initialIdentity else { throw IdentityDatabaseError.identityNotFound }
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self.identity = identity
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networkClient.instanceURL = identity.url
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do {
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networkClient.accessToken = try environment.secrets.item(.accessToken, forIdentityID: identity.id)
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} catch {
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alertItem = AlertItem(error: error)
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}
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observation.assignErrorsToAlertItem(to: \.alertItem, on: self).assign(to: &$identity)
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environment.identityDatabase.recentIdentitiesObservation(excluding: identityID)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.assign(to: &$recentIdentities)
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environment.identityDatabase.updateLastUsedAt(identityID: identityID)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.sink(receiveValue: {})
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.store(in: &cancellables)
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}
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}
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extension MainNavigationViewModel {
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func refreshIdentity() {
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let id = identity.id
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if networkClient.accessToken != nil {
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networkClient.request(AccountEndpoint.verifyCredentials)
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.map { ($0, id) }
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.flatMap(environment.identityDatabase.updateAccount)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.sink(receiveValue: {})
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.store(in: &cancellables)
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}
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networkClient.request(InstanceEndpoint.instance)
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.map { ($0, id) }
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.flatMap(environment.identityDatabase.updateInstance)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.sink(receiveValue: {})
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.store(in: &cancellables)
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}
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func settingsViewModel() -> SettingsViewModel {
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SettingsViewModel(identity: _identity, environment: environment)
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}
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}
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extension MainNavigationViewModel {
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enum Tab: CaseIterable {
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case timelines
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case search
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case notifications
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case messages
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}
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}
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extension MainNavigationViewModel.Tab {
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var title: String {
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switch self {
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case .timelines: return "Timelines"
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case .search: return "Search"
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case .notifications: return "Notifications"
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case .messages: return "Messages"
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}
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}
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var systemImageName: String {
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switch self {
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case .timelines: return "house"
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case .search: return "magnifyingglass"
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case .notifications: return "bell"
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case .messages: return "envelope"
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}
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}
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}
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extension MainNavigationViewModel.Tab: Identifiable {
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var id: Self { self }
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}
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