Refactoring

Shared/Databases/IdentityDatabase.swift

@@ -38,7 +38,8 @@ extension IdentityDatabase {
                 lastUsedAt: Date(),
                 preferences: Identity.Preferences(),
                 instanceURI: nil,
-                pushSubscriptionAlerts: nil)
+                lastRegisteredDeviceToken: nil,
+                pushSubscriptionAlerts: .initial)
                 .save)
             .eraseToAnyPublisher()
     }
@@ -202,7 +203,7 @@ private extension IdentityDatabase {
                     .indexed()
                     .references("instance", column: "uri")
                 t.column("preferences", .blob).notNull()
-                t.column("pushSubscriptionAlerts", .blob)
+                t.column("pushSubscriptionAlerts", .blob).notNull()
                 t.column("lastRegisteredDeviceToken", .text)
             }
 
@@ -233,7 +234,8 @@ private struct StoredIdentity: Codable, Hashable, TableRecord, FetchableRecord,
     let lastUsedAt: Date
     let preferences: Identity.Preferences
     let instanceURI: String?
-    let pushSubscriptionAlerts: PushSubscription.Alerts?
+    let lastRegisteredDeviceToken: String?
+    let pushSubscriptionAlerts: PushSubscription.Alerts
 }
 
 extension StoredIdentity {
@@ -253,7 +255,7 @@ private struct IdentityResult: Codable, Hashable, FetchableRecord {
     let identity: StoredIdentity
     let instance: Identity.Instance?
     let account: Identity.Account?
-    let pushSubscriptionAlerts: PushSubscription.Alerts?
+    let pushSubscriptionAlerts: PushSubscription.Alerts
 }
 
 private extension Identity {
@@ -265,6 +267,7 @@ private extension Identity {
             preferences: result.identity.preferences,
             instance: result.instance,
             account: result.account,
+            lastRegisteredDeviceToken: result.identity.lastRegisteredDeviceToken,
             pushSubscriptionAlerts: result.pushSubscriptionAlerts)
     }
 }

Shared/Model/Identity.swift

@@ -9,7 +9,8 @@ struct Identity: Codable, Hashable, Identifiable {
     let preferences: Identity.Preferences
     let instance: Identity.Instance?
     let account: Identity.Account?
-    let pushSubscriptionAlerts: PushSubscription.Alerts?
+    let lastRegisteredDeviceToken: String?
+    let pushSubscriptionAlerts: PushSubscription.Alerts
 }
 
 extension Identity {

Shared/Model/PushSubscription.swift

@@ -15,3 +15,7 @@ struct PushSubscription: Codable {
     let alerts: Alerts
     let serverKey: String
 }
+
+extension PushSubscription.Alerts {
+    static let initial: Self = Self(follow: true, favourite: true, reblog: true, mention: true, poll: true)
+}

Shared/Networking/Mastodon API/Endpoints/PushSubscriptionEndpoint.swift

@@ -7,13 +7,9 @@ enum PushSubscriptionEndpoint {
             endpoint: URL,
             publicKey: String,
             auth: String,
-            follow: Bool,
+            alerts: PushSubscription.Alerts)
-            favourite: Bool,
-            reblog: Bool,
-            mention: Bool,
-            poll: Bool)
     case read
-    case update(follow: Bool, favourite: Bool, reblog: Bool, mention: Bool, poll: Bool)
+    case update(alerts: PushSubscription.Alerts)
     case delete
 }
 
@@ -37,7 +33,7 @@ extension PushSubscriptionEndpoint: MastodonEndpoint {
 
     var parameters: [String: Any]? {
         switch self {
-        case let .create(endpoint, publicKey, auth, follow, favourite, reblog, mention, poll):
+        case let .create(endpoint, publicKey, auth, alerts):
             return ["subscription":
                         ["endpoint": endpoint.absoluteString,
                          "keys": [
@@ -45,20 +41,20 @@ extension PushSubscriptionEndpoint: MastodonEndpoint {
                             "auth": auth]],
                     "data": [
                         "alerts": [
-                            "follow": follow,
+                            "follow": alerts.follow,
-                            "favourite": favourite,
+                            "favourite": alerts.favourite,
-                            "reblog": reblog,
+                            "reblog": alerts.reblog,
-                            "mention": mention,
+                            "mention": alerts.mention,
-                            "poll": poll
+                            "poll": alerts.poll
                         ]]]
-        case let .update(follow, favourite, reblog, mention, poll):
+        case let .update(alerts):
             return ["data":
                         ["alerts":
-                            ["follow": follow,
+                            ["follow": alerts.follow,
-                             "favourite": favourite,
+                             "favourite": alerts.favourite,
-                             "reblog": reblog,
+                             "reblog": alerts.reblog,
-                             "mention": mention,
+                             "mention": alerts.mention,
-                             "poll": poll]]]
+                             "poll": alerts.poll]]]
         default: return nil
         }
     }

Shared/Services/IdentitiesService.swift

@@ -65,82 +65,20 @@ extension IdentitiesService {
             .eraseToAnyPublisher()
     }
 
-    func updatePushSubscription(
-        identityID: UUID,
-        instanceURL: URL,
-        deviceToken: String,
-        alerts: PushSubscription.Alerts?) -> AnyPublisher<Void, Error> {
-        let secretsService = SecretsService(
-            identityID: identityID,
-            keychainServiceType: environment.keychainServiceType)
-        let accessTokenOptional: String?
-
-        do {
-            accessTokenOptional = try secretsService.item(.accessToken) as String?
-        } catch {
-            return Fail(error: error).eraseToAnyPublisher()
-        }
-
-        guard let accessToken: String = accessTokenOptional
-        else { return Empty().eraseToAnyPublisher() }
-
-        let publicKey: String
-        let auth: String
-
-        do {
-            publicKey = try secretsService.generatePushKeyAndReturnPublicKey().base64EncodedString()
-            auth = try secretsService.generatePushAuth().base64EncodedString()
-        } catch {
-            return Fail(error: error).eraseToAnyPublisher()
-        }
-
-        let networkClient = MastodonClient(session: environment.session)
-        networkClient.instanceURL = instanceURL
-        networkClient.accessToken = accessToken
-
-        let endpoint = Self.pushSubscriptionEndpointURL
-            .appendingPathComponent(deviceToken)
-            .appendingPathComponent(identityID.uuidString)
-
-        return networkClient.request(
-            PushSubscriptionEndpoint.create(
-                endpoint: endpoint,
-                publicKey: publicKey,
-                auth: auth,
-                follow: alerts?.follow ?? true,
-                favourite: alerts?.favourite ?? true,
-                reblog: alerts?.reblog ?? true,
-                mention: alerts?.mention ?? true,
-                poll: alerts?.poll ?? true))
-            .map { (deviceToken, $0.alerts, identityID) }
-            .flatMap(identityDatabase.updatePushSubscription(deviceToken:alerts:forIdentityID:))
-            .eraseToAnyPublisher()
-    }
-
     func updatePushSubscriptions(deviceToken: String) -> AnyPublisher<Void, Error> {
         identityDatabase.identitiesWithOutdatedDeviceTokens(deviceToken: deviceToken)
-            .flatMap { identities -> Publishers.MergeMany<AnyPublisher<Void, Never>> in
+            .tryMap { [weak self] identities -> [AnyPublisher<Void, Never>] in
-                Publishers.MergeMany(
+                guard let self = self else { return [Empty().eraseToAnyPublisher()] }
-                    identities.map { [weak self] in
-                        guard let self = self else { return Empty().eraseToAnyPublisher() }
 
-                        return self.updatePushSubscription(
+                return try identities.map {
-                            identityID: $0.id,
+                    try self.identityService(id: $0.id)
-                            instanceURL: $0.url,
+                        .createPushSubscription(deviceToken: deviceToken, alerts: $0.pushSubscriptionAlerts)
-                            deviceToken: deviceToken,
+                        .catch { _ in Empty() } // don't want to disrupt pipeline, consider future telemetry
-                            alerts: $0.pushSubscriptionAlerts)
+                        .eraseToAnyPublisher()
-                            .catch { _ in Empty() } // can't let one failure stop the pipeline
+                }
-                            .eraseToAnyPublisher()
-                    })
             }
+            .map(Publishers.MergeMany.init)
+            .map { _ in () }
             .eraseToAnyPublisher()
     }
 }
-
-private extension IdentitiesService {
-    #if DEBUG
-    static let pushSubscriptionEndpointURL = URL(string: "https://metatext-apns.metabolist.com/push?sandbox=true")!
-    #else
-    static let pushSubscriptionEndpointURL = URL(string: "https://metatext-apns.metabolist.com/push")!
-    #endif
-}

Shared/Services/IdentityService.swift

@@ -10,6 +10,7 @@ class IdentityService {
     private let identityDatabase: IdentityDatabase
     private let environment: AppEnvironment
     private let networkClient: MastodonClient
+    private let secretsService: SecretsService
     private let observationErrorsInput = PassthroughSubject<Error, Never>()
 
     init(identityID: UUID,
@@ -29,12 +30,12 @@ class IdentityService {
         guard let identity = initialIdentity else { throw IdentityDatabaseError.identityNotFound }
 
         self.identity = identity
-        networkClient = MastodonClient(session: environment.session)
+        secretsService = SecretsService(
-        networkClient.instanceURL = identity.url
-        networkClient.accessToken = try SecretsService(
             identityID: identityID,
             keychainServiceType: environment.keychainServiceType)
-            .item(.accessToken)
+        networkClient = MastodonClient(session: environment.session)
+        networkClient.instanceURL = identity.url
+        networkClient.accessToken = try secretsService.item(.accessToken)
 
         observation.catch { [weak self] error -> Empty<Identity, Never> in
             self?.observationErrorsInput.send(error)
@@ -85,4 +86,39 @@ extension IdentityService {
     func updatePreferences(_ preferences: Identity.Preferences) -> AnyPublisher<Void, Error> {
         identityDatabase.updatePreferences(preferences, forIdentityID: identity.id)
     }
+
+    func createPushSubscription(deviceToken: String, alerts: PushSubscription.Alerts) -> AnyPublisher<Void, Error> {
+        let publicKey: String
+        let auth: String
+
+        do {
+            publicKey = try secretsService.generatePushKeyAndReturnPublicKey().base64EncodedString()
+            auth = try secretsService.generatePushAuth().base64EncodedString()
+        } catch {
+            return Fail(error: error).eraseToAnyPublisher()
+        }
+
+        let identityID = identity.id
+        let endpoint = Self.pushSubscriptionEndpointURL
+            .appendingPathComponent(deviceToken)
+            .appendingPathComponent(identityID.uuidString)
+
+        return networkClient.request(
+            PushSubscriptionEndpoint.create(
+                endpoint: endpoint,
+                publicKey: publicKey,
+                auth: auth,
+                alerts: alerts))
+            .map { (deviceToken, $0.alerts, identityID) }
+            .flatMap(identityDatabase.updatePushSubscription(deviceToken:alerts:forIdentityID:))
+            .eraseToAnyPublisher()
+    }
+}
+
+private extension IdentityService {
+    #if DEBUG
+    static let pushSubscriptionEndpointURL = URL(string: "https://metatext-apns.metabolist.com/push?sandbox=true")!
+    #else
+    static let pushSubscriptionEndpointURL = URL(string: "https://metatext-apns.metabolist.com/push")!
+    #endif
 }

Shared/View Models/AddIdentityViewModel.swift

@@ -7,15 +7,15 @@ class AddIdentityViewModel: ObservableObject {
     @Published var urlFieldText = ""
     @Published var alertItem: AlertItem?
     @Published private(set) var loading = false
-    let addedIdentityIDAndURL: AnyPublisher<(UUID, URL), Never>
+    let addedIdentityID: AnyPublisher<UUID, Never>
 
     private let identitiesService: IdentitiesService
-    private let addedIdentityIDAndURLInput = PassthroughSubject<(UUID, URL), Never>()
+    private let addedIdentityIDInput = PassthroughSubject<UUID, Never>()
     private var cancellables = Set<AnyCancellable>()
 
     init(identitiesService: IdentitiesService) {
         self.identitiesService = identitiesService
-        addedIdentityIDAndURL = addedIdentityIDAndURLInput.eraseToAnyPublisher()
+        addedIdentityID = addedIdentityIDInput.eraseToAnyPublisher()
     }
 
     func logInTapped() {
@@ -33,13 +33,13 @@ class AddIdentityViewModel: ObservableObject {
         identitiesService.authorizeIdentity(id: identityID, instanceURL: instanceURL)
             .map { (identityID, instanceURL) }
             .flatMap(identitiesService.createIdentity(id:instanceURL:))
-            .map { (identityID, instanceURL) }
+            .map { identityID }
             .assignErrorsToAlertItem(to: \.alertItem, on: self)
             .receive(on: RunLoop.main)
             .handleEvents(
                 receiveSubscription: { [weak self] _ in self?.loading = true },
                 receiveCompletion: { [weak self] _ in self?.loading = false  })
-            .sink(receiveValue: addedIdentityIDAndURLInput.send)
+            .sink(receiveValue: addedIdentityIDInput.send)
             .store(in: &cancellables)
     }
 
@@ -57,9 +57,9 @@ class AddIdentityViewModel: ObservableObject {
 
         // TODO: Ensure instance has not disabled public preview
         identitiesService.createIdentity(id: identityID, instanceURL: instanceURL)
-            .map { (identityID, instanceURL) }
+            .map { identityID }
             .assignErrorsToAlertItem(to: \.alertItem, on: self)
-            .sink(receiveValue: addedIdentityIDAndURLInput.send)
+            .sink(receiveValue: addedIdentityIDInput.send)
             .store(in: &cancellables)
     }
 }

Shared/View Models/RootViewModel.swift

@@ -55,22 +55,19 @@ extension RootViewModel {
             .store(in: &cancellables)
 
         identityService.updateLastUse()
-            .sink(receiveCompletion: { _ in }, receiveValue: {})
+            .sink { _ in } receiveValue: { _ in }
             .store(in: &cancellables)
 
-        mainNavigationViewModel = MainNavigationViewModel(identityService: identityService)
-    }
-
-    func newIdentityCreated(id: UUID, instanceURL: URL) {
-        newIdentitySelected(id: id)
-
         userNotificationService.isAuthorized()
             .filter { $0 }
             .zip(appDelegate.registerForRemoteNotifications())
-            .map { (id, instanceURL, $1, nil) }
+            .filter { identityService.identity.lastRegisteredDeviceToken != $1 }
-            .flatMap(identitiesService.updatePushSubscription(identityID:instanceURL:deviceToken:alerts:))
+            .map { ($1, identityService.identity.pushSubscriptionAlerts) }
+            .flatMap(identityService.createPushSubscription(deviceToken:alerts:))
             .sink { _ in } receiveValue: { _ in }
             .store(in: &cancellables)
+
+        mainNavigationViewModel = MainNavigationViewModel(identityService: identityService)
     }
 
     func deleteIdentity(id: UUID) {

Shared/Views/AddIdentityView.swift

@@ -34,9 +34,9 @@ struct AddIdentityView: View {
         }
         .paddingIfMac()
         .alertItem($viewModel.alertItem)
-        .onReceive(viewModel.addedIdentityIDAndURL) { id, url in
+        .onReceive(viewModel.addedIdentityID) { id in
             withAnimation {
-                rootViewModel.newIdentityCreated(id: id, instanceURL: url)
+                rootViewModel.newIdentitySelected(id: id)
             }
         }
     }

Tests/View Models/RootViewModelTests.swift

@@ -13,7 +13,7 @@ class RootViewModelTests: XCTestCase {
                                 identitiesService: IdentitiesService(
                                     identityDatabase: .fresh(),
                                     environment: .development),
-                                notificationService: NotificationService())
+                                userNotificationService: UserNotificationService())
         let recorder = sut.$mainNavigationViewModel.record()
 
         XCTAssertNil(try wait(for: recorder.next(), timeout: 1))