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128 lines
3.8 KiB
Swift
128 lines
3.8 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 SceneViewModel: ObservableObject {
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@Published private(set) var identity: Identity? {
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didSet {
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if let identity = identity {
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recentIdentityID = identity.id
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networkClient.instanceURL = identity.url
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do {
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networkClient.accessToken = try 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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}
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}
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}
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@Published var alertItem: AlertItem?
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var selectedTopLevelNavigation: TopLevelNavigation? = .timelines
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private let networkClient: MastodonClient
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private let identityDatabase: IdentityDatabase
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private let secrets: Secrets
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private let userDefaults: UserDefaults
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private var cancellables = Set<AnyCancellable>()
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init(networkClient: MastodonClient,
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identityDatabase: IdentityDatabase,
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secrets: Secrets,
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userDefaults: UserDefaults = .standard) {
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self.networkClient = networkClient
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self.identityDatabase = identityDatabase
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self.secrets = secrets
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self.userDefaults = userDefaults
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if let recentIdentityID = recentIdentityID {
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identity = try? identityDatabase.identity(id: recentIdentityID)
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refreshIdentity()
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}
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}
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}
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extension SceneViewModel {
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func refreshIdentity() {
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guard let identity = identity else { return }
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if networkClient.accessToken != nil {
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networkClient.request(AccountEndpoint.verifyCredentials)
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.map { ($0, identity.id) }
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.flatMap(identityDatabase.updateAccount)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.assign(to: \.identity, on: self)
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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, identity.id) }
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.flatMap(identityDatabase.updateInstance)
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.assignErrorsToAlertItem(to: \.alertItem, on: self)
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.assign(to: \.identity, on: self)
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.store(in: &cancellables)
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}
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func addIdentityViewModel() -> AddIdentityViewModel {
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let addAccountViewModel = AddIdentityViewModel(
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networkClient: networkClient,
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identityDatabase: identityDatabase,
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secrets: secrets)
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addAccountViewModel.addedIdentity
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.sink(receiveValue: addIdentity(_:))
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.store(in: &cancellables)
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return addAccountViewModel
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}
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}
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private extension SceneViewModel {
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private static let recentIdentityIDKey = "recentIdentityID"
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private var recentIdentityID: String? {
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get { userDefaults.value(forKey: Self.recentIdentityIDKey) as? String }
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set { userDefaults.set(newValue, forKey: Self.recentIdentityIDKey) }
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}
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private func addIdentity(_ identity: Identity) {
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self.identity = identity
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refreshIdentity()
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}
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}
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extension SceneViewModel {
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enum TopLevelNavigation: 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 SceneViewModel.TopLevelNavigation {
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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 SceneViewModel.TopLevelNavigation: Identifiable {
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var id: Self { self }
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}
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