mirror of
https://github.com/metabolist/metatext.git
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204 lines
8.3 KiB
Swift
204 lines
8.3 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import Combine
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import Foundation
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import Mastodon
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import ServiceLayer
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public final class RootViewModel: ObservableObject {
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@Published public private(set) var navigationViewModel: NavigationViewModel?
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@Published private var mostRecentlyUsedIdentityId: Identity.Id?
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private let environment: AppEnvironment
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private let registerForRemoteNotifications: () -> AnyPublisher<Data, Error>
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private let allIdentitiesService: AllIdentitiesService
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private let userNotificationService: UserNotificationService
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private var cancellables = Set<AnyCancellable>()
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public init(environment: AppEnvironment,
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registerForRemoteNotifications: @escaping () -> AnyPublisher<Data, Error>) throws {
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self.environment = environment
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self.registerForRemoteNotifications = registerForRemoteNotifications
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allIdentitiesService = try AllIdentitiesService(environment: environment)
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userNotificationService = UserNotificationService(environment: environment)
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allIdentitiesService.immediateMostRecentlyUsedIdentityIdPublisher()
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.replaceError(with: nil)
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.assign(to: &$mostRecentlyUsedIdentityId)
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identitySelected(id: mostRecentlyUsedIdentityId, immediate: true, notify: false)
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allIdentitiesService.identitiesCreated
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.sink { [weak self] in self?.identitySelected(id: $0) }
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.store(in: &cancellables)
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userNotificationService.isAuthorized(request: false)
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.filter { $0 }
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.zip(registerForRemoteNotifications())
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.map { $1 }
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.flatMap(allIdentitiesService.updatePushSubscriptions(deviceToken:))
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.sink { _ in } receiveValue: { _ in }
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.store(in: &cancellables)
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userNotificationService.events
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.sink { [weak self] in self?.handle(event: $0) }
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.store(in: &cancellables)
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}
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}
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public extension RootViewModel {
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func identitySelected(id: Identity.Id?) {
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identitySelected(id: id, immediate: false, notify: false)
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}
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func deleteIdentity(id: Identity.Id) {
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allIdentitiesService.deleteIdentity(id: id)
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.sink { _ in } receiveValue: { _ in }
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.store(in: &cancellables)
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}
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func addIdentityViewModel() -> AddIdentityViewModel {
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AddIdentityViewModel(
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allIdentitiesService: allIdentitiesService,
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instanceURLService: InstanceURLService(environment: environment))
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}
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func newStatusViewModel(
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identityContext: IdentityContext,
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identity: Identity? = nil,
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inReplyTo: StatusViewModel? = nil,
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redraft: Status? = nil,
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directMessageTo: AccountViewModel? = nil) -> NewStatusViewModel {
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NewStatusViewModel(
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allIdentitiesService: allIdentitiesService,
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identityContext: identityContext,
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environment: environment,
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identity: identity,
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inReplyTo: inReplyTo,
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redraft: redraft,
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directMessageTo: directMessageTo,
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extensionContext: nil)
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}
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}
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private extension RootViewModel {
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static let identityChangeNotificationUserInfoKey =
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"com.metabolist.metatext.identity-change-notification-user-info-key"
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static let removeIdentityChangeNotificationAfter = DispatchTimeInterval.seconds(10)
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// swiftlint:disable:next function_body_length
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func identitySelected(id: Identity.Id?, immediate: Bool, notify: Bool) {
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navigationViewModel?.presentingSecondaryNavigation = false
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guard
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let id = id,
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let identityService = try? allIdentitiesService.identityService(id: id) else {
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navigationViewModel = nil
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return
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}
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let identityPublisher = identityService.identityPublisher(immediate: immediate)
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.catch { [weak self] _ -> Empty<Identity, Never> in
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DispatchQueue.main.async {
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if self?.navigationViewModel?.identityContext.identity.id == id {
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self?.identitySelected(id: self?.mostRecentlyUsedIdentityId,
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immediate: false,
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notify: true)
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}
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}
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return Empty()
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}
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.share()
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identityPublisher
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.first()
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.map { [weak self] in
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guard let self = self else { return nil }
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let identityContext = IdentityContext(
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identity: $0,
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publisher: identityPublisher.eraseToAnyPublisher(),
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service: identityService,
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environment: self.environment)
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identityContext.service.updateLastUse()
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.sink { _ in } receiveValue: { _ in }
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.store(in: &self.cancellables)
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if identityContext.identity.authenticated,
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!identityContext.identity.pending {
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self.userNotificationService.isAuthorized(request: true)
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.filter { $0 }
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.zip(self.registerForRemoteNotifications())
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.filter { identityContext.identity.lastRegisteredDeviceToken != $1 }
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.map { ($1, identityContext.identity.pushSubscriptionAlerts) }
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.flatMap(identityContext.service.createPushSubscription(deviceToken:alerts:))
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.sink { _ in } receiveValue: { _ in }
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.store(in: &self.cancellables)
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}
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if notify {
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self.notifyIdentityChange(identityContext: identityContext)
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}
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return NavigationViewModel(identityContext: identityContext)
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}
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.assign(to: &$navigationViewModel)
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}
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func handle(event: UserNotificationService.Event) {
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switch event {
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case let .willPresentNotification(notification, completionHandler):
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completionHandler(.banner)
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if notification.request.content.userInfo[Self.identityChangeNotificationUserInfoKey] as? Bool == true {
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DispatchQueue.main.asyncAfter(deadline: .now() + Self.removeIdentityChangeNotificationAfter) {
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self.userNotificationService.removeDeliveredNotifications(
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withIdentifiers: [notification.request.identifier])
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}
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}
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case let .didReceiveResponse(response, completionHandler):
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let userInfo = response.notification.request.content.userInfo
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if let identityIdString = userInfo[PushNotificationParsingService.identityIdUserInfoKey] as? String,
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let identityId = Identity.Id(uuidString: identityIdString),
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let pushNotificationJSON = userInfo[PushNotificationParsingService.pushNotificationUserInfoKey] as? Data,
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let pushNotification = try? MastodonDecoder().decode(PushNotification.self, from: pushNotificationJSON) {
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handle(pushNotification: pushNotification, identityId: identityId)
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}
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completionHandler()
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default:
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break
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}
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}
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func handle(pushNotification: PushNotification, identityId: Identity.Id) {
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if identityId != navigationViewModel?.identityContext.identity.id {
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identitySelected(id: identityId, immediate: false, notify: true)
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}
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$navigationViewModel.first { $0?.identityContext.identity.id == identityId }
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// Ensure views are set up if switching accounts
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.delay(for: .milliseconds(1), scheduler: DispatchQueue.main)
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.sink { $0?.navigate(pushNotification: pushNotification) }
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.store(in: &cancellables)
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}
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func notifyIdentityChange(identityContext: IdentityContext) {
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let content = UserNotificationService.MutableContent()
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content.body = String.localizedStringWithFormat(
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NSLocalizedString("notification.signed-in-as-%@", comment: ""),
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identityContext.identity.handle)
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content.userInfo[Self.identityChangeNotificationUserInfoKey] = true
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let request = UserNotificationService.Request(identifier: UUID().uuidString, content: content, trigger: nil)
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userNotificationService.add(request: request)
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.sink { _ in } receiveValue: { _ in }
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.store(in: &cancellables)
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}
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}
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