Deep link to iOS Settings from Notifications prefs

Closes #467

NotificationExtension/Info.plist

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>TuskerInfo</key>
+	<dict>
+		<key>PushProxyHost</key>
+		<string>$(TUSKER_PUSH_PROXY_HOST)</string>
+		<key>PushProxyScheme</key>
+		<string>$(TUSKER_PUSH_PROXY_SCHEME)</string>
+		<key>SentryDSN</key>
+		<string>$(SENTRY_DSN)</string>
+	</dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.usernotifications.service</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).NotificationService</string>
+	</dict>
+</dict>
+</plist>

NotificationExtension/NotificationExtension.entitlements

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.$(BUNDLE_ID_PREFIX).Tusker</string>
+	</array>
+	<key>com.apple.security.network.client</key>
+	<true/>
+</dict>
+</plist>

NotificationExtension/NotificationService.swift

@@ -0,0 +1,354 @@
+//
+//  NotificationService.swift
+//  NotificationExtension
+//
+//  Created by Shadowfacts on 4/9/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import UserNotifications
+import UserAccounts
+import PushNotifications
+import CryptoKit
+import OSLog
+import Pachyderm
+import Intents
+import HTMLStreamer
+import WebURL
+
+private let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "NotificationService")
+
+class NotificationService: UNNotificationServiceExtension {
+    
+    private static let textConverter = TextConverter(configuration: .init(insertNewlines: false), callbacks: HTMLCallbacks.self)
+    
+    private var pendingRequest: (UNMutableNotificationContent, (UNNotificationContent) -> Void, Task<Void, Never>)?
+
+    override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
+        guard let mutableContent = request.content.mutableCopy() as? UNMutableNotificationContent else {
+            logger.error("Couldn't get mutable content")
+            contentHandler(request.content)
+            return
+        }
+        
+        guard request.content.userInfo["v"] as? Int == 1,
+              let accountID = (request.content.userInfo["ctx"] as? String).flatMap(\.removingPercentEncoding),
+              let account = UserAccountsManager.shared.getAccount(id: accountID),
+              let subscription = getSubscription(account: account),
+              let encryptedBody = (request.content.userInfo["data"] as? String).flatMap({ Data(base64Encoded: $0) }),
+              let salt = (request.content.userInfo["salt"] as? String).flatMap(decodeBase64URL(_:)),
+              let serverPublicKeyData = (request.content.userInfo["pk"] as? String).flatMap(decodeBase64URL(_:)) else {
+            logger.error("Missing info from push notification")
+            contentHandler(request.content)
+            return
+        }
+        
+        guard let body = decryptNotification(subscription: subscription, serverPublicKeyData: serverPublicKeyData, salt: salt, encryptedBody: encryptedBody) else {
+            contentHandler(request.content)
+            return
+        }
+
+        let withoutPadding = body.dropFirst(2)
+        
+        let notification: PushNotification
+        do {
+            notification = try JSONDecoder().decode(PushNotification.self, from: withoutPadding)
+        } catch {
+            logger.error("Unable to decode push payload: \(String(describing: error))")
+            contentHandler(request.content)
+            return
+        }
+        
+        mutableContent.title = notification.title
+        mutableContent.body = notification.body
+        mutableContent.userInfo["notificationID"] = notification.notificationID
+        mutableContent.userInfo["accountID"] = accountID
+
+        let task = Task {
+            await updateNotificationContent(mutableContent, account: account, push: notification)
+            if !Task.isCancelled {
+                contentHandler(pendingRequest?.0 ?? mutableContent)
+                pendingRequest = nil
+            }
+        }
+        pendingRequest = (mutableContent, contentHandler, task)
+    }
+    
+    override func serviceExtensionTimeWillExpire() {
+        if let pendingRequest {
+            logger.debug("Expiring with pending request")
+            pendingRequest.2.cancel()
+            pendingRequest.1(pendingRequest.0)
+            self.pendingRequest = nil
+        } else {
+            logger.debug("Expiring without pending request")
+        }
+    }
+    
+    private func updateNotificationContent(_ content: UNMutableNotificationContent, account: UserAccountInfo, push: PushNotification) async {
+        let client = Client(baseURL: account.instanceURL, accessToken: account.accessToken)
+        let notification: Pachyderm.Notification
+        do {
+            notification = try await client.run(Client.getNotification(id: push.notificationID)).0
+        } catch {
+            logger.error("Error fetching notification: \(String(describing: error))")
+            return
+        }
+        
+        let kindStr: String?
+        switch notification.kind {
+        case .reblog:
+            kindStr = "🔁 Reblogged"
+        case .favourite:
+            kindStr = "⭐️ Favorited"
+        case .follow:
+            kindStr = "👤 Followed by @\(notification.account.acct)"
+        case .followRequest:
+            kindStr = "👤 Asked to follow by @\(notification.account.acct)"
+        case .poll:
+            kindStr = "📊 Poll finished"
+        case .update:
+            kindStr = "✏️ Edited"
+        default:
+            kindStr = nil
+        }
+        
+        let notificationContent: String?
+        if let status = notification.status {
+            notificationContent = NotificationService.textConverter.convert(html: status.content)
+        } else if notification.kind == .follow || notification.kind == .followRequest {
+            notificationContent = nil
+        } else {
+            notificationContent = push.body
+        }
+        
+        content.body = [kindStr, notificationContent].compactMap { $0 }.joined(separator: "\n")
+        
+        let attachmentDataTask: Task<URL?, Never>?
+        // We deliberately don't include attachments for other types of notifications that have statuses (favs, etc.)
+        // because we risk just fetching the same thing a bunch of times for many senders.
+        if notification.kind == .mention || notification.kind == .status || notification.kind == .update,
+           let attachment = notification.status?.attachments.first {
+            let url = attachment.previewURL ?? attachment.url
+            attachmentDataTask = Task {
+                do {
+                    let data = try await URLSession.shared.data(from: url).0
+                    let localAttachmentURL = FileManager.default.temporaryDirectory.appendingPathComponent("attachment_\(attachment.id)").appendingPathExtension(url.pathExtension)
+                    try data.write(to: localAttachmentURL)
+                    return localAttachmentURL
+                } catch {
+                    logger.error("Error setting notification attachments: \(String(describing: error))")
+                    return nil
+                }
+            }
+        } else {
+            attachmentDataTask = nil
+        }
+        
+        let conversationIdentifier: String?
+        if let status = notification.status {
+            if let context = status.pleromaExtras?.context {
+                conversationIdentifier = "context:\(context)"
+            } else if [Notification.Kind.reblog, .favourite, .poll, .update].contains(notification.kind) {
+                conversationIdentifier = "status:\(status.id)"
+            } else {
+                conversationIdentifier = nil
+            }
+        } else {
+            conversationIdentifier = nil
+        }
+        
+        let account: Account?
+        switch notification.kind {
+        case .mention, .status:
+            account = notification.status?.account
+        default:
+            account = notification.account
+        }
+        let sender: INPerson?
+        if let account {
+            let handle = INPersonHandle(value: "@\(account.acct)", type: .unknown)
+            let image: INImage?
+            if let avatar = account.avatar,
+               let (data, resp) = try? await URLSession.shared.data(from: avatar),
+               let code = (resp as? HTTPURLResponse)?.statusCode,
+               (200...299).contains(code) {
+                image = INImage(imageData: data)
+            } else {
+                image = nil
+            }
+            sender = INPerson(
+                personHandle: handle,
+                nameComponents: nil,
+                displayName: account.displayName,
+                image: image,
+                contactIdentifier: nil,
+                customIdentifier: account.id
+            )
+        } else {
+            sender = nil
+        }
+
+        let intent = INSendMessageIntent(
+            recipients: nil,
+            outgoingMessageType: .outgoingMessageText,
+            content: notificationContent,
+            speakableGroupName: nil,
+            conversationIdentifier: conversationIdentifier,
+            serviceName: nil,
+            sender: sender,
+            attachments: nil
+        )
+        
+        let interaction = INInteraction(intent: intent, response: nil)
+        interaction.direction = .incoming
+        
+        do {
+            try await interaction.donate()
+        } catch {
+            logger.error("Error donating interaction: \(String(describing: error))")
+            return
+        }
+        
+        let updatedContent: UNMutableNotificationContent
+        do {
+            let newContent = try content.updating(from: intent)
+            if let newMutableContent = newContent.mutableCopy() as? UNMutableNotificationContent {
+                pendingRequest?.0 = newMutableContent
+                updatedContent = newMutableContent
+            } else {
+                updatedContent = content
+            }
+        } catch {
+            logger.error("Error updating notification from intent: \(String(describing: error))")
+            updatedContent = content
+        }
+        
+        if let localAttachmentURL = await attachmentDataTask?.value,
+           let attachment = try? UNNotificationAttachment(identifier: localAttachmentURL.lastPathComponent, url: localAttachmentURL) {
+            updatedContent.attachments = [
+                attachment
+            ]
+        }
+    }
+    
+    private func getSubscription(account: UserAccountInfo) -> PushNotifications.PushSubscription? {
+        DispatchQueue.main.sync {
+            // this is necessary because of a swift bug: https://github.com/apple/swift/pull/72507
+            MainActor.runUnsafely {
+                PushManager.shared.pushSubscription(account: account)
+            }
+        }
+    }
+    
+    private func decryptNotification(subscription: PushNotifications.PushSubscription, serverPublicKeyData: Data, salt: Data, encryptedBody: Data) -> Data? {
+        // See https://github.com/ClearlyClaire/webpush/blob/f14a4d52e201128b1b00245d11b6de80d6cfdcd9/lib/webpush/encryption.rb
+        
+        var context = Data()
+        context.append(0)
+        let clientPublicKey = subscription.secretKey.publicKey.x963Representation
+        let clientPublicKeyLength = UInt16(clientPublicKey.count)
+        context.append(UInt8((clientPublicKeyLength >> 8) & 0xFF))
+        context.append(UInt8(clientPublicKeyLength & 0xFF))
+        context.append(clientPublicKey)
+        let serverPublicKeyLength = UInt16(serverPublicKeyData.count)
+        context.append(UInt8((serverPublicKeyLength >> 8) & 0xFF))
+        context.append(UInt8(serverPublicKeyLength & 0xFF))
+        context.append(serverPublicKeyData)
+        
+        func info(encoding: String) -> Data {
+            var info = Data("Content-Encoding: \(encoding)\0P-256".utf8)
+            info.append(context)
+            return info
+        }
+
+        let sharedSecret: SharedSecret
+        do {
+            let serverPublicKey = try P256.KeyAgreement.PublicKey(x963Representation: serverPublicKeyData)
+            sharedSecret = try subscription.secretKey.sharedSecretFromKeyAgreement(with: serverPublicKey)
+        } catch {
+            logger.error("Error getting shared secret: \(String(describing: error))")
+            return nil
+        }
+        
+        let sharedInfo = Data("Content-Encoding: auth\0".utf8)
+        let pseudoRandomKey = sharedSecret.hkdfDerivedSymmetricKey(using: SHA256.self, salt: subscription.authSecret, sharedInfo: sharedInfo, outputByteCount: 32)
+        let contentEncryptionKeyInfo = info(encoding: "aesgcm")
+        let contentEncryptionKey = HKDF<SHA256>.deriveKey(inputKeyMaterial: pseudoRandomKey, salt: salt, info: contentEncryptionKeyInfo, outputByteCount: 16)
+        let nonceInfo = info(encoding: "nonce")
+        let nonce = HKDF<SHA256>.deriveKey(inputKeyMaterial: pseudoRandomKey, salt: salt, info: nonceInfo, outputByteCount: 12)
+        
+        let nonceAndEncryptedBody = nonce.withUnsafeBytes { noncePtr in
+            var data = Data(buffer: noncePtr.bindMemory(to: UInt8.self))
+            data.append(encryptedBody)
+            return data
+        }
+        do {
+            let sealedBox = try AES.GCM.SealedBox(combined: nonceAndEncryptedBody)
+            let decrypted = try AES.GCM.open(sealedBox, using: contentEncryptionKey)
+            return decrypted
+        } catch {
+            logger.error("Error decrypting push: \(String(describing: error))")
+            return nil
+        }
+    }
+
+}
+
+extension MainActor {
+    @_unavailableFromAsync
+    @available(macOS, obsoleted: 14.0)
+    @available(iOS, obsoleted: 17.0)
+    @available(watchOS, obsoleted: 10.0)
+    @available(tvOS, obsoleted: 17.0)
+    static func runUnsafely<T>(_ body: @MainActor () throws -> T) rethrows -> T {
+        if #available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *) {
+            return try MainActor.assumeIsolated(body)
+        }
+        
+        dispatchPrecondition(condition: .onQueue(.main))
+        return try withoutActuallyEscaping(body) { fn in
+            try unsafeBitCast(fn, to: (() throws -> T).self)()
+        }
+    }
+}
+
+private func decodeBase64URL(_ s: String) -> Data? {
+    var str = s.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
+    if str.count % 4 != 0 {
+        str.append(String(repeating: "=", count: 4 - str.count % 4))
+    }
+    return Data(base64Encoded: str)
+}
+
+// copied from HTMLConverter.Callbacks, blergh
+private struct HTMLCallbacks: HTMLConversionCallbacks {
+    static func makeURL(string: String) -> URL? {
+        // Converting WebURL to URL is a small but non-trivial expense (since it works by
+        // serializing the WebURL as a string and then having Foundation parse it again),
+        // so, if available, use the system parser which doesn't require another round trip.
+        if #available(iOS 16.0, macOS 13.0, *),
+           let url = try? URL.ParseStrategy().parse(string) {
+            url
+        } else if let web = WebURL(string),
+                  let url = URL(web) {
+            url
+        } else {
+            URL(string: string)
+        }
+    }
+    
+    static func elementAction(name: String, attributes: [Attribute]) -> ElementAction {
+        guard name == "span" else {
+            return .default
+        }
+        let clazz = attributes.attributeValue(for: "class")
+        if clazz == "invisible" {
+            return .skip
+        } else if clazz == "ellipsis" {
+            return .append("…")
+        } else {
+            return .default
+        }
+    }
+}

Packages/Pachyderm/Sources/Pachyderm/Client.swift

@@ -341,6 +341,10 @@ public struct Client: Sendable {
     }
     
     // MARK: - Notifications
+    public static func getNotification(id: String) -> Request<Notification> {
+        return Request(method: .get, path: "/api/v1/notifications/\(id)")
+    }
+    
     public static func getNotifications(allowedTypes: [Notification.Kind], range: RequestRange = .default) -> Request<[Notification]> {
         var request = Request<[Notification]>(method: .get, path: "/api/v1/notifications", queryParameters:
             "types" => allowedTypes.map { $0.rawValue }

Packages/Pachyderm/Sources/Pachyderm/Model/PushNotification.swift

@@ -0,0 +1,46 @@
+//
+//  PushNotification.swift
+//  Pachyderm
+//
+//  Created by Shadowfacts on 4/9/24.
+//
+
+import Foundation
+import WebURL
+
+public struct PushNotification: Decodable {
+    public let accessToken: String
+    public let preferredLocale: String
+    public let notificationID: String
+    public let notificationType: Notification.Kind
+    public let icon: WebURL
+    public let title: String
+    public let body: String
+    
+    public init(from decoder: any Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.accessToken = try container.decode(String.self, forKey: .accessToken)
+        self.preferredLocale = try container.decode(String.self, forKey: .preferredLocale)
+        // this should be a string, but mastodon encodes it as a json number
+        if let s = try? container.decode(String.self, forKey: .notificationID) {
+            self.notificationID = s
+        } else {
+            let i = try container.decode(Int.self, forKey: .notificationID)
+            self.notificationID = i.description
+        }
+        self.notificationType = try container.decode(Notification.Kind.self, forKey: .notificationType)
+        self.icon = try container.decode(WebURL.self, forKey: .icon)
+        self.title = try container.decode(String.self, forKey: .title)
+        self.body = try container.decode(String.self, forKey: .body)
+    }
+    
+    private enum CodingKeys: String, CodingKey {
+        case accessToken = "access_token"
+        case preferredLocale = "preferred_locale"
+        case notificationID = "notification_id"
+        case notificationType = "notification_type"
+        case icon
+        case title
+        case body
+    }
+}

Packages/Pachyderm/Sources/Pachyderm/Model/PushSubscription.swift

@@ -12,13 +12,108 @@ public struct PushSubscription: Decodable, Sendable {
     public let id: String
     public let endpoint: URL
     public let serverKey: String
-    //    TODO: WTF is this?
-//    public let alerts
+    public let alerts: Alerts
+    public let policy: Policy
+    
+    public init(from decoder: any Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        // id is documented as being a string, but mastodon returns a json number
+        if let s = try? container.decode(String.self, forKey: .id) {
+            self.id = s
+        } else {
+            let i = try container.decode(Int.self, forKey: .id)
+            self.id = i.description
+        }
+        self.endpoint = try container.decode(URL.self, forKey: .endpoint)
+        self.serverKey = try container.decode(String.self, forKey: .serverKey)
+        self.alerts = try container.decode(PushSubscription.Alerts.self, forKey: .alerts)
+        self.policy = try container.decode(PushSubscription.Policy.self, forKey: .policy)
+    }
+    
+    public static func create(endpoint: URL, publicKey: Data, authSecret: Data, alerts: Alerts, policy: Policy) -> Request<PushSubscription> {
+        return Request(method: .post, path: "/api/v1/push/subscription", body: ParametersBody([
+            "subscription[endpoint]" => endpoint.absoluteString,
+            "subscription[keys][p256dh]" => publicKey.base64EncodedString(),
+            "subscription[keys][auth]" => authSecret.base64EncodedString(),
+            "data[alerts][mention]" => alerts.mention,
+            "data[alerts][status]" => alerts.status,
+            "data[alerts][reblog]" => alerts.reblog,
+            "data[alerts][follow]" => alerts.follow,
+            "data[alerts][follow_request]" => alerts.followRequest,
+            "data[alerts][favourite]" => alerts.favourite,
+            "data[alerts][poll]" => alerts.poll,
+            "data[alerts][update]" => alerts.update,
+            "data[policy]" => policy.rawValue,
+        ]))
+    }
+    
+    public static func update(alerts: Alerts, policy: Policy) -> Request<PushSubscription> {
+        return Request(method: .put, path: "/api/v1/push/subscription", body: ParametersBody([
+            "data[alerts][mention]" => alerts.mention,
+            "data[alerts][status]" => alerts.status,
+            "data[alerts][reblog]" => alerts.reblog,
+            "data[alerts][follow]" => alerts.follow,
+            "data[alerts][follow_request]" => alerts.followRequest,
+            "data[alerts][favourite]" => alerts.favourite,
+            "data[alerts][poll]" => alerts.poll,
+            "data[alerts][update]" => alerts.update,
+            "data[policy]" => policy.rawValue,
+        ]))
+    }
+    
+    public static func delete() -> Request<Empty> {
+        return Request(method: .delete, path: "/api/v1/push/subscription")
+    }
     
     private enum CodingKeys: String, CodingKey {
         case id
         case endpoint
         case serverKey = "server_key"
-//        case alerts
+        case alerts
+        case policy
+    }
+}
+
+extension PushSubscription {
+    public struct Alerts: Decodable, Sendable {
+        public let mention: Bool
+        public let status: Bool
+        public let reblog: Bool
+        public let follow: Bool
+        public let followRequest: Bool
+        public let favourite: Bool
+        public let poll: Bool
+        public let update: Bool
+        
+        public init(mention: Bool, status: Bool, reblog: Bool, follow: Bool, followRequest: Bool, favourite: Bool, poll: Bool, update: Bool) {
+            self.mention = mention
+            self.status = status
+            self.reblog = reblog
+            self.follow = follow
+            self.followRequest = followRequest
+            self.favourite = favourite
+            self.poll = poll
+            self.update = update
+        }
+        
+        private enum CodingKeys: String, CodingKey {
+            case mention
+            case status
+            case reblog
+            case follow
+            case followRequest = "follow_request"
+            case favourite
+            case poll
+            case update
+        }
+    }
+}
+
+extension PushSubscription {
+    public enum Policy: String, Decodable, Sendable {
+        case all
+        case followed
+        case followers
+        case none
     }
 }

Packages/Pachyderm/Sources/Pachyderm/Model/Scope.swift

@@ -12,6 +12,7 @@ public enum Scope: String, Sendable {
     case read
     case write
     case follow
+    case push
 }
 
 extension Array where Element == Scope {

Packages/Pachyderm/Sources/Pachyderm/Model/Status.swift

@@ -46,6 +46,8 @@ public final class Status: StatusProtocol, Decodable, Sendable {
     public let localOnly: Bool?
     public let editedAt: Date?
     
+    public let pleromaExtras: PleromaExtras?
+    
     public var applicationName: String? { application?.name }
     
     public init(from decoder: Decoder) throws {
@@ -98,6 +100,8 @@ public final class Status: StatusProtocol, Decodable, Sendable {
         self.card = try container.decodeIfPresent(Card.self, forKey: .card)
         self.poll = try container.decodeIfPresent(Poll.self, forKey: .poll)
         self.editedAt = try container.decodeIfPresent(Date.self, forKey: .editedAt)
+        
+        self.pleromaExtras = try container.decodeIfPresent(PleromaExtras.self, forKey: .pleromaExtras)
     }
     
     public static func getContext(_ statusID: String) -> Request<ConversationContext> {
@@ -212,7 +216,15 @@ public final class Status: StatusProtocol, Decodable, Sendable {
         case poll
         case localOnly = "local_only"
         case editedAt = "edited_at"
+        
+        case pleromaExtras = "pleroma"
     }
 }
 
 extension Status: Identifiable {}
+
+extension Status {
+    public struct PleromaExtras: Decodable, Sendable {
+        public let context: String?
+    }
+}

Packages/PushNotifications/.gitignore

@@ -0,0 +1,8 @@
+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

Packages/PushNotifications/.swiftpm/xcode/xcshareddata/xcschemes/PushNotifications.xcscheme

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1530"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      buildArchitectures = "Automatic">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "PushNotifications"
+               BuildableName = "PushNotifications"
+               BlueprintName = "PushNotifications"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "PushNotifications"
+            BuildableName = "PushNotifications"
+            BlueprintName = "PushNotifications"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Packages/PushNotifications/Package.swift

@@ -0,0 +1,32 @@
+// swift-tools-version: 5.10
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "PushNotifications",
+    platforms: [
+        .iOS(.v15),
+    ],
+    products: [
+        // Products define the executables and libraries a package produces, making them visible to other packages.
+        .library(
+            name: "PushNotifications",
+            targets: ["PushNotifications"]),
+    ],
+    dependencies: [
+        .package(path: "../UserAccounts"),
+        .package(path: "../Pachyderm"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package, defining a module or a test suite.
+        // Targets can depend on other targets in this package and products from dependencies.
+        .target(
+            name: "PushNotifications",
+            dependencies: ["UserAccounts", "Pachyderm"]
+        ),
+        .testTarget(
+            name: "PushNotificationsTests",
+            dependencies: ["PushNotifications"]),
+    ]
+)

Packages/PushNotifications/Sources/PushNotifications/DisabledPushManager.swift

@@ -0,0 +1,47 @@
+//
+//  DisabledPushManager.swift
+//  PushNotifications
+//
+//  Created by Shadowfacts on 4/7/24.
+//
+
+import Foundation
+import UserAccounts
+
+class DisabledPushManager: _PushManager {
+    var enabled: Bool {
+        false
+    }
+    
+    var subscriptions: [PushSubscription] {
+        []
+    }
+    
+    func createSubscription(account: UserAccountInfo) async throws -> PushSubscription {
+        throw Disabled()
+    }
+    
+    func removeSubscription(account: UserAccountInfo) {
+    }
+    
+    func updateSubscription(account: UserAccountInfo, alerts: PushSubscription.Alerts, policy: PushSubscription.Policy) {
+    }
+    
+    func pushSubscription(account: UserAccountInfo) -> PushSubscription? {
+        nil
+    }
+    
+    func updateIfNecessary(updateSubscription: @escaping (PushSubscription) async -> Bool) async {
+    }
+    
+    func didRegisterForRemoteNotifications(deviceToken: Data) {
+    }
+    func didFailToRegisterForRemoteNotifications(error: any Error) {
+    }
+    
+    struct Disabled: LocalizedError {
+        var errorDescription: String? {
+            "Push notifications disabled"
+        }
+    }
+}

Packages/PushNotifications/Sources/PushNotifications/PushManager.swift

@@ -0,0 +1,55 @@
+//
+//  PushManager.swift
+//  PushNotifications
+//
+//  Created by Shadowfacts on 4/7/24.
+//
+
+import Foundation
+import OSLog
+import Pachyderm
+import UserAccounts
+
+public struct PushManager {
+    @MainActor
+    public static let shared = createPushManager()
+    
+    public static let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "PushManager")
+    
+    @MainActor
+    public static var captureError: ((any Error) -> Void)?
+
+    private init() {}
+    
+    @MainActor
+    private static func createPushManager() -> any _PushManager {
+        guard let info = Bundle.main.object(forInfoDictionaryKey: "TuskerInfo") as? [String: Any],
+              let host = info["PushProxyHost"] as? String,
+              !host.isEmpty else {
+            logger.debug("Missing proxy info, push disabled")
+            return DisabledPushManager()
+        }
+        var endpoint = URLComponents()
+        endpoint.scheme = "https"
+        endpoint.host = host
+        let url = endpoint.url!
+        logger.debug("Push notifications enabled with proxy \(url.absoluteString, privacy: .public)")
+        return PushManagerImpl(endpoint: url)
+    }
+}
+
+@MainActor
+public protocol _PushManager {
+    var enabled: Bool { get }
+    
+    var subscriptions: [PushSubscription] { get }
+    func createSubscription(account: UserAccountInfo) async throws -> PushSubscription
+    func removeSubscription(account: UserAccountInfo)
+    func updateSubscription(account: UserAccountInfo, alerts: PushSubscription.Alerts, policy: PushSubscription.Policy)
+    func pushSubscription(account: UserAccountInfo) -> PushSubscription?
+    
+    func updateIfNecessary(updateSubscription: @escaping (PushSubscription) async -> Bool) async
+    
+    func didRegisterForRemoteNotifications(deviceToken: Data)
+    func didFailToRegisterForRemoteNotifications(error: any Error)
+}

Packages/PushNotifications/Sources/PushNotifications/PushManagerImpl.swift

@@ -0,0 +1,202 @@
+//
+//  PushManagerImpl.swift
+//  PushNotifications
+//
+//  Created by Shadowfacts on 4/7/24.
+//
+
+import UIKit
+import UserAccounts
+import CryptoKit
+
+class PushManagerImpl: _PushManager {
+    private let endpoint: URL
+    
+    var enabled: Bool {
+        true
+    }
+    
+    private var apnsEnvironment: String {
+        #if DEBUG
+        "development"
+        #else
+        "production"
+        #endif
+    }
+    
+    private var remoteNotificationsRegistrationContinuation: CheckedContinuation<Data, any Error>?
+    
+    private let defaults = UserDefaults(suiteName: "group.space.vaccor.Tusker")!
+    public private(set) var subscriptions: [PushSubscription] {
+        get {
+            if let array = defaults.array(forKey: "PushSubscriptions") as? [[String: Any]] {
+                return array.compactMap(PushSubscription.init(defaultsDict:))
+            } else {
+                return []
+            }
+        }
+        set {
+            defaults.setValue(newValue.map(\.defaultsDict), forKey: "PushSubscriptions")
+        }
+    }
+    
+    init(endpoint: URL) {
+        self.endpoint = endpoint
+    }
+    
+    func createSubscription(account: UserAccountInfo) async throws -> PushSubscription {
+        if let existing = pushSubscription(account: account) {
+            return existing
+        }
+        let key = P256.KeyAgreement.PrivateKey()
+        var authSecret = Data(count: 16)
+        let res = authSecret.withUnsafeMutableBytes { ptr in
+            SecRandomCopyBytes(kSecRandomDefault, 16, ptr.baseAddress!)
+        }
+        guard res == errSecSuccess else {
+            throw CreateSubscriptionError.generatingAuthSecret(res)
+        }
+        let token = try await getDeviceToken()
+        let subscription = PushSubscription(
+            accountID: account.id,
+            endpoint: endpointURL(deviceToken: token, accountID: account.id),
+            secretKey: key,
+            authSecret: authSecret,
+            alerts: [],
+            policy: .all
+        )
+        subscriptions.append(subscription)
+        return subscription
+    }
+    
+    private func endpointURL(deviceToken: Data, accountID: String) -> URL {
+        var endpoint = URLComponents(url: endpoint, resolvingAgainstBaseURL: false)!
+        let accountID = accountID.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed)!
+        endpoint.path = "/push/v1/\(apnsEnvironment)/\(deviceToken.hexEncodedString())/\(accountID)"
+        return endpoint.url!
+    }
+    
+    func removeSubscription(account: UserAccountInfo) {
+        subscriptions.removeAll { $0.accountID == account.id }
+    }
+    
+    func updateSubscription(account: UserAccountInfo, alerts: PushSubscription.Alerts, policy: PushSubscription.Policy) {
+        guard let index = subscriptions.firstIndex(where: { $0.accountID == account.id }) else {
+            return
+        }
+        var copy = subscriptions[index]
+        copy.alerts = alerts
+        copy.policy = policy
+        subscriptions[index] = copy
+    }
+    
+    func pushSubscription(account: UserAccountInfo) -> PushSubscription? {
+        subscriptions.first { $0.accountID == account.id }
+    }
+    
+    func updateIfNecessary(updateSubscription: @escaping (PushSubscription) async -> Bool) async {
+        let subscriptions = self.subscriptions
+        guard !subscriptions.isEmpty else {
+            return
+        }
+        do {
+            let token = try await getDeviceToken()
+            self.subscriptions = await AsyncSequenceAdaptor(wrapping: subscriptions).map {
+                let newEndpoint = await self.endpointURL(deviceToken: token, accountID: $0.accountID)
+                guard newEndpoint != $0.endpoint else {
+                    return $0
+                }
+                var copy = $0
+                copy.endpoint = newEndpoint
+                if await updateSubscription(copy) {
+                    return copy
+                } else {
+                    return $0
+                }
+            }.reduce(into: [], { partialResult, el in
+                partialResult.append(el)
+            })
+        } catch {
+            PushManager.logger.error("Failed to update push registration: \(String(describing: error), privacy: .public)")
+            PushManager.captureError?(error)
+        }
+    }
+    
+    private func getDeviceToken() async throws -> Data {
+        return try await withCheckedThrowingContinuation { continuation in
+            remoteNotificationsRegistrationContinuation = continuation
+            UIApplication.shared.registerForRemoteNotifications()
+        }
+    }
+    
+    func didRegisterForRemoteNotifications(deviceToken: Data) {
+        remoteNotificationsRegistrationContinuation?.resume(returning: deviceToken)
+        remoteNotificationsRegistrationContinuation = nil
+    }
+    
+    func didFailToRegisterForRemoteNotifications(error: any Error) {
+        remoteNotificationsRegistrationContinuation?.resume(throwing: PushRegistrationError.registeringForRemoteNotifications(error))
+        remoteNotificationsRegistrationContinuation = nil
+    }
+}
+
+enum PushRegistrationError: LocalizedError {
+    case alreadyRegistering
+    case registeringForRemoteNotifications(any Error)
+    
+    var errorDescription: String? {
+        switch self {
+        case .alreadyRegistering:
+            "Already registering"
+        case .registeringForRemoteNotifications(let error):
+            "Remote notifications: \(error.localizedDescription)"
+        }
+    }
+}
+
+enum CreateSubscriptionError: LocalizedError {
+    case generatingAuthSecret(OSStatus)
+    
+    var errorDescription: String? {
+        switch self {
+        case .generatingAuthSecret(let code):
+            "Generating auth secret: \(code)"
+        }
+    }
+}
+
+private extension Data {
+    func hexEncodedString() -> String {
+        String(unsafeUninitializedCapacity: count * 2) { buffer in
+            let chars = Array("0123456789ABCDEF".utf8)
+            for (i, x) in enumerated() {
+                let (upper, lower) = x.quotientAndRemainder(dividingBy: 16)
+                buffer[i * 2] = chars[Int(upper)]
+                buffer[i * 2 + 1] = chars[Int(lower)]
+            }
+            return count * 2
+        }
+    }
+}
+
+private struct AsyncSequenceAdaptor<S: Sequence>: AsyncSequence {
+    typealias Element = S.Element
+    
+    let base: S
+    
+    init(wrapping base: S) {
+        self.base = base
+    }
+    
+    func makeAsyncIterator() -> AsyncIterator {
+        AsyncIterator(base: base.makeIterator())
+    }
+    
+    struct AsyncIterator: AsyncIteratorProtocol {
+        var base: S.Iterator
+        
+        mutating func next() async -> Element? {
+            base.next()
+        }
+    }
+}

Packages/PushNotifications/Sources/PushNotifications/PushSubscription.swift

@@ -0,0 +1,80 @@
+//
+//  PushSubscription.swift
+//  PushNotifications
+//
+//  Created by Shadowfacts on 4/7/24.
+//
+
+import Foundation
+import CryptoKit
+
+public struct PushSubscription {
+    public let accountID: String
+    public internal(set) var endpoint: URL
+    public let secretKey: P256.KeyAgreement.PrivateKey
+    public let authSecret: Data
+    public var alerts: Alerts
+    public var policy: Policy
+    
+    var defaultsDict: [String: Any] {
+        [
+            "accountID": accountID,
+            "endpoint": endpoint.absoluteString,
+            "secretKey": secretKey.rawRepresentation,
+            "authSecret": authSecret,
+            "alerts": alerts.rawValue,
+            "policy": policy.rawValue
+        ]
+    }
+    
+    init?(defaultsDict: [String: Any]) {
+        guard let accountID = defaultsDict["accountID"] as? String,
+              let endpoint = (defaultsDict["endpoint"] as? String).flatMap(URL.init(string:)),
+              let secretKey = (defaultsDict["secretKey"] as? Data).flatMap({ try? P256.KeyAgreement.PrivateKey(rawRepresentation: $0) }),
+              let authSecret = defaultsDict["authSecret"] as? Data,
+              let alerts = defaultsDict["alerts"] as? Int,
+              let policy = (defaultsDict["policy"] as? String).flatMap(Policy.init(rawValue:)) else {
+            return nil
+        }
+        self.accountID = accountID
+        self.endpoint = endpoint
+        self.secretKey = secretKey
+        self.authSecret = authSecret
+        self.alerts = Alerts(rawValue: alerts)
+        self.policy = policy
+    }
+    
+    init(accountID: String, endpoint: URL, secretKey: P256.KeyAgreement.PrivateKey, authSecret: Data, alerts: Alerts, policy: Policy) {
+        self.accountID = accountID
+        self.endpoint = endpoint
+        self.secretKey = secretKey
+        self.authSecret = authSecret
+        self.alerts = alerts
+        self.policy = policy
+    }
+
+    public enum Policy: String, CaseIterable, Identifiable {
+        case all, followed, followers
+        
+        public var id: some Hashable {
+            self
+        }
+    }
+    
+    public struct Alerts: OptionSet, Hashable {
+        public static let mention = Alerts(rawValue: 1 << 0)
+        public static let status = Alerts(rawValue: 1 << 1)
+        public static let reblog = Alerts(rawValue: 1 << 2)
+        public static let follow = Alerts(rawValue: 1 << 3)
+        public static let followRequest = Alerts(rawValue: 1 << 4)
+        public static let favorite = Alerts(rawValue: 1 << 5)
+        public static let poll = Alerts(rawValue: 1 << 6)
+        public static let update = Alerts(rawValue: 1 << 7)
+
+        public let rawValue: Int
+        
+        public init(rawValue: Int) {
+            self.rawValue = rawValue
+        }
+    }
+}

Packages/PushNotifications/Tests/PushNotificationsTests/PushNotificationsTests.swift

@@ -0,0 +1,12 @@
+import XCTest
+@testable import PushNotifications
+
+final class PushNotificationsTests: XCTestCase {
+    func testExample() throws {
+        // XCTest Documentation
+        // https://developer.apple.com/documentation/xctest
+
+        // Defining Test Cases and Test Methods
+        // https://developer.apple.com/documentation/xctest/defining_test_cases_and_test_methods
+    }
+}

Packages/TuskerComponents/Sources/TuskerComponents/AsyncPicker.swift

@@ -0,0 +1,83 @@
+//
+//  AsyncPicker.swift
+//  TuskerComponents
+//
+//  Created by Shadowfacts on 4/9/24.
+//
+
+import SwiftUI
+
+public struct AsyncPicker<V: Hashable, Content: View>: View {
+    let titleKey: LocalizedStringKey
+    @available(iOS, obsoleted: 16.0, message: "Switch to LabeledContent")
+    let labelHidden: Bool
+    let alignment: Alignment
+    @Binding var value: V
+    let onChange: (V) async -> Bool
+    let content: Content
+    @State private var isLoading = false
+    
+    public init(_ titleKey: LocalizedStringKey, labelHidden: Bool = false, alignment: Alignment = .center, value: Binding<V>, onChange: @escaping (V) async -> Bool, @ViewBuilder content: () -> Content) {
+        self.titleKey = titleKey
+        self.labelHidden = labelHidden
+        self.alignment = alignment
+        self._value = value
+        self.onChange = onChange
+        self.content = content()
+    }
+    
+    public var body: some View {
+        if #available(iOS 16.0, *) {
+            LabeledContent(titleKey) {
+                picker
+            }
+        } else if labelHidden {
+            picker
+        } else {
+            HStack {
+                Text(titleKey)
+                Spacer()
+                picker
+            }
+        }
+    }
+    
+    private var picker: some View {
+        ZStack(alignment: alignment) {
+            Picker(titleKey, selection: Binding(get: {
+                value
+            }, set: { newValue in
+                let oldValue = value
+                value = newValue
+                isLoading = true
+                Task {
+                    let operationCompleted = await onChange(newValue)
+                    if !operationCompleted {
+                        value = oldValue
+                    }
+                    isLoading = false
+                }
+            })) {
+                content
+            }
+            .labelsHidden()
+            .opacity(isLoading ? 0 : 1)
+
+            if isLoading {
+                ProgressView()
+            }
+        }
+    }
+}
+
+#Preview {
+    @State var value = 0
+    return AsyncPicker("", value: $value) { _ in
+        try! await Task.sleep(nanoseconds: NSEC_PER_SEC)
+        return true
+    } content: {
+        ForEach(0..<10) {
+            Text("\($0)").tag($0)
+        }
+    }
+}

Packages/TuskerComponents/Sources/TuskerComponents/AsyncToggle.swift

@@ -0,0 +1,79 @@
+//
+//  AsyncToggle.swift
+//  TuskerComponents
+//
+//  Created by Shadowfacts on 4/7/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import SwiftUI
+
+public struct AsyncToggle: View {
+    let titleKey: LocalizedStringKey
+    @available(iOS, obsoleted: 16.0, message: "Switch to LabeledContent")
+    let labelHidden: Bool
+    @Binding var mode: Mode
+    let onChange: (Bool) async -> Bool
+    
+    public init(_ titleKey: LocalizedStringKey, labelHidden: Bool = false, mode: Binding<Mode>, onChange: @escaping (Bool) async -> Bool) {
+        self.titleKey = titleKey
+        self.labelHidden = labelHidden
+        self._mode = mode
+        self.onChange = onChange
+    }
+    
+    public var body: some View {
+        if #available(iOS 16.0, *) {
+            LabeledContent(titleKey) {
+                toggleOrSpinner
+            }
+        } else if labelHidden {
+            toggleOrSpinner
+        } else {
+            HStack {
+                Text(titleKey)
+                Spacer()
+                toggleOrSpinner
+            }
+        }
+    }
+    
+    @ViewBuilder
+    private var toggleOrSpinner: some View {
+        ZStack {
+            Toggle(titleKey, isOn: Binding {
+                mode == .on
+            } set: { newValue in
+                mode = .loading
+                Task {
+                    let operationCompleted = await onChange(newValue)
+                    if operationCompleted {
+                        mode = newValue ? .on : .off
+                    } else {
+                        mode = newValue ? .off : .on
+                    }
+                }
+            })
+            .labelsHidden()
+            .opacity(mode == .loading ? 0 : 1)
+            
+            if mode == .loading {
+                ProgressView()
+            }
+        }
+    }
+    
+    public enum Mode {
+        case off
+        case loading
+        case on
+    }
+}
+
+#Preview {
+    @State var mode = AsyncToggle.Mode.on
+    return AsyncToggle("", mode: $mode) { _ in
+        try! await Task.sleep(nanoseconds: NSEC_PER_SEC)
+        return true
+    }
+}

Packages/UserAccounts/Sources/UserAccounts/UserAccountInfo.swift

@@ -11,10 +11,11 @@ import CryptoKit
 public struct UserAccountInfo: Equatable, Hashable, Identifiable, Sendable {
     public let id: String
     public let instanceURL: URL
-    public let clientID: String
-    public let clientSecret: String
-    public private(set) var username: String!
-    public let accessToken: String
+    public internal(set) var clientID: String
+    public internal(set) var clientSecret: String
+    public let username: String!
+    public internal(set) var accessToken: String
+    public internal(set) var scopes: [String]?
     
     // Sort of hack to be able to access these from the share extension.
     public internal(set) var serverDefaultLanguage: String?
@@ -40,16 +41,19 @@ public struct UserAccountInfo: Equatable, Hashable, Identifiable, Sendable {
         self.instanceURL = instanceURL
         self.clientID = clientID
         self.clientSecret = clientSecret
+        self.username = nil
         self.accessToken = accessToken
+        self.scopes = nil
     }
     
-    init(instanceURL: URL, clientID: String, clientSecret: String, username: String? = nil, accessToken: String) {
+    init(instanceURL: URL, clientID: String, clientSecret: String, username: String? = nil, accessToken: String, scopes: [String]) {
         self.id = UserAccountInfo.id(instanceURL: instanceURL, username: username)
         self.instanceURL = instanceURL
         self.clientID = clientID
         self.clientSecret = clientSecret
         self.username = username
         self.accessToken = accessToken
+        self.scopes = scopes
     }
     
     init?(userDefaultsDict dict: [String: Any]) {
@@ -67,6 +71,7 @@ public struct UserAccountInfo: Equatable, Hashable, Identifiable, Sendable {
         self.clientSecret = secret
         self.username = dict["username"] as? String
         self.accessToken = accessToken
+        self.scopes = dict["scopes"] as? [String]
         self.serverDefaultLanguage = dict["serverDefaultLanguage"] as? String
         self.serverDefaultVisibility = dict["serverDefaultVisibility"] as? String
         self.serverDefaultFederation = dict["serverDefaultFederation"] as? Bool
@@ -83,6 +88,9 @@ public struct UserAccountInfo: Equatable, Hashable, Identifiable, Sendable {
         if let username {
             dict["username"] = username
         }
+        if let scopes {
+            dict["scopes"] = scopes
+        }
         if let serverDefaultLanguage {
             dict["serverDefaultLanguage"] = serverDefaultLanguage
         }
@@ -100,12 +108,4 @@ public struct UserAccountInfo: Equatable, Hashable, Identifiable, Sendable {
         // slashes are not allowed in the persistent store coordinator name
         id.replacingOccurrences(of: "/", with: "_")
     }
-    
-    public func hash(into hasher: inout Hasher) {
-        hasher.combine(id)
-    }
-    
-    public static func ==(lhs: UserAccountInfo, rhs: UserAccountInfo) -> Bool {
-        return lhs.id == rhs.id
-    }
 }

Packages/UserAccounts/Sources/UserAccounts/UserAccountsManager.swift

@@ -25,7 +25,9 @@ public class UserAccountsManager: ObservableObject {
                         clientID: "client_id",
                         clientSecret: "client_secret",
                         username: "admin",
-                        accessToken: "access_token")
+                        accessToken: "access_token",
+                        scopes: []
+                    )
                 ]
             }
         } else {
@@ -38,7 +40,7 @@ public class UserAccountsManager: ObservableObject {
     private let accountsKey = "accounts"
     public private(set) var accounts: [UserAccountInfo] {
         get {
-            if let array = defaults.array(forKey: accountsKey) as? [[String: String]] {
+            if let array = defaults.array(forKey: accountsKey) as? [[String: Any]] {
                 return array.compactMap(UserAccountInfo.init(userDefaultsDict:))
             } else {
                 return []
@@ -101,12 +103,12 @@ public class UserAccountsManager: ObservableObject {
         return !accounts.isEmpty
     }
     
-    public func addAccount(instanceURL url: URL, clientID: String, clientSecret secret: String, username: String?, accessToken: String) -> UserAccountInfo {
+    public func addAccount(instanceURL url: URL, clientID: String, clientSecret secret: String, username: String?, accessToken: String, scopes: [String]) -> UserAccountInfo {
         var accounts = self.accounts
         if let index = accounts.firstIndex(where: { $0.instanceURL == url && $0.username == username }) {
             accounts.remove(at: index)
         }
-        let info = UserAccountInfo(instanceURL: url, clientID: clientID, clientSecret: secret, username: username, accessToken: accessToken)
+        let info = UserAccountInfo(instanceURL: url, clientID: clientID, clientSecret: secret, username: username, accessToken: accessToken, scopes: scopes)
         accounts.append(info)
         self.accounts = accounts
         return info
@@ -145,6 +147,18 @@ public class UserAccountsManager: ObservableObject {
         account.serverDefaultFederation = defaultFederation
         accounts[index] = account
     }
+    
+    public func updateCredentials(_ account: UserAccountInfo, clientID: String, clientSecret: String, accessToken: String, scopes: [String]) {
+        guard let index = accounts.firstIndex(where: { $0.id == account.id }) else {
+            return
+        }
+        var account = account
+        account.clientID = clientID
+        account.clientSecret = clientSecret
+        account.accessToken = accessToken
+        account.scopes = scopes
+        accounts[index] = account
+    }
 
 }
 

ShareExtension/ShareExtension.entitlements

@@ -6,7 +6,7 @@
 	<true/>
 	<key>com.apple.security.application-groups</key>
 	<array>
-		<string>group.space.vaccor.Tusker</string>
+		<string>group.$(BUNDLE_ID_PREFIX).Tusker</string>
 	</array>
 	<key>com.apple.security.network.client</key>
 	<true/>

Tusker.xcconfig.example

@@ -3,3 +3,4 @@
 DEVELOPMENT_TEAM = YOUR_TEAM_ID
 BUNDLE_ID_PREFIX = com.example
 
+TUSKER_PUSH_PROXY_HOST = 

Tusker.xcodeproj/project.pbxproj

@@ -92,6 +92,16 @@
 		D62E9985279CA23900C26176 /* URLSession+Development.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62E9984279CA23900C26176 /* URLSession+Development.swift */; };
 		D62E9987279D094F00C26176 /* StatusMetaIndicatorsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62E9986279D094F00C26176 /* StatusMetaIndicatorsView.swift */; };
 		D62FF04823D7CDD700909D6E /* AttributedStringHelperTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D62FF04723D7CDD700909D6E /* AttributedStringHelperTests.swift */; };
+		D630C3C82BC43AFD00208903 /* PushNotifications in Frameworks */ = {isa = PBXBuildFile; productRef = D630C3C72BC43AFD00208903 /* PushNotifications */; };
+		D630C3CA2BC59FF500208903 /* MastodonController+Push.swift in Sources */ = {isa = PBXBuildFile; fileRef = D630C3C92BC59FF500208903 /* MastodonController+Push.swift */; };
+		D630C3CC2BC5FD4600208903 /* GetAuthorizationTokenService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D630C3CB2BC5FD4600208903 /* GetAuthorizationTokenService.swift */; };
+		D630C3D42BC61B6100208903 /* NotificationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D630C3D32BC61B6100208903 /* NotificationService.swift */; };
+		D630C3D82BC61B6100208903 /* NotificationExtension.appex in Embed Foundation Extensions */ = {isa = PBXBuildFile; fileRef = D630C3D12BC61B6000208903 /* NotificationExtension.appex */; platformFilters = (ios, maccatalyst, ); settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
+		D630C3DF2BC61C4900208903 /* PushNotifications in Frameworks */ = {isa = PBXBuildFile; productRef = D630C3DE2BC61C4900208903 /* PushNotifications */; };
+		D630C3E12BC61C6700208903 /* UserAccounts in Frameworks */ = {isa = PBXBuildFile; productRef = D630C3E02BC61C6700208903 /* UserAccounts */; };
+		D630C3E52BC6313400208903 /* Pachyderm in Frameworks */ = {isa = PBXBuildFile; productRef = D630C3E42BC6313400208903 /* Pachyderm */; };
+		D630C4232BC7842C00208903 /* HTMLStreamer in Frameworks */ = {isa = PBXBuildFile; productRef = D630C4222BC7842C00208903 /* HTMLStreamer */; };
+		D630C4252BC7845800208903 /* WebURL in Frameworks */ = {isa = PBXBuildFile; productRef = D630C4242BC7845800208903 /* WebURL */; };
 		D6311C5025B3765B00B27539 /* ImageDataCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6311C4F25B3765B00B27539 /* ImageDataCache.swift */; };
 		D6333B372137838300CE884A /* AttributedString+Helpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6333B362137838300CE884A /* AttributedString+Helpers.swift */; };
 		D6333B792139AEFD00CE884A /* Date+TimeAgo.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6333B782139AEFD00CE884A /* Date+TimeAgo.swift */; };
@@ -121,6 +131,9 @@
 		D64AAE9126C80DC600FC57FB /* ToastView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64AAE9026C80DC600FC57FB /* ToastView.swift */; };
 		D64AAE9526C88C5000FC57FB /* ToastableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64AAE9426C88C5000FC57FB /* ToastableViewController.swift */; };
 		D64AAE9726C88DC400FC57FB /* ToastConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64AAE9626C88DC400FC57FB /* ToastConfiguration.swift */; };
+		D64B967C2BC19C28002C8990 /* NotificationsPrefsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64B967B2BC19C28002C8990 /* NotificationsPrefsView.swift */; };
+		D64B96812BC3279D002C8990 /* PrefsAccountView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64B96802BC3279D002C8990 /* PrefsAccountView.swift */; };
+		D64B96842BC3893C002C8990 /* PushSubscriptionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64B96832BC3893C002C8990 /* PushSubscriptionView.swift */; };
 		D64D0AB12128D9AE005A6F37 /* OnboardingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64D0AB02128D9AE005A6F37 /* OnboardingViewController.swift */; };
 		D64D8CA92463B494006B0BAA /* MultiThreadDictionary.swift in Sources */ = {isa = PBXBuildFile; fileRef = D64D8CA82463B494006B0BAA /* MultiThreadDictionary.swift */; };
 		D651C5B42915B00400236EF6 /* ProfileFieldsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D651C5B32915B00400236EF6 /* ProfileFieldsView.swift */; };
@@ -129,6 +142,7 @@
 		D6552367289870790048A653 /* ScreenCorners in Frameworks */ = {isa = PBXBuildFile; platformFilters = (ios, maccatalyst, ); productRef = D6552366289870790048A653 /* ScreenCorners */; };
 		D659F35E2953A212002D944A /* TTTKit in Frameworks */ = {isa = PBXBuildFile; productRef = D659F35D2953A212002D944A /* TTTKit */; };
 		D659F36229541065002D944A /* TTTView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D659F36129541065002D944A /* TTTView.swift */; };
+		D65A261D2BC39399005EB5D8 /* PushInstanceSettingsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65A261C2BC39399005EB5D8 /* PushInstanceSettingsView.swift */; };
 		D65B4B542971F71D00DABDFB /* EditedReport.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B4B532971F71D00DABDFB /* EditedReport.swift */; };
 		D65B4B562971F98300DABDFB /* ReportView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B4B552971F98300DABDFB /* ReportView.swift */; };
 		D65B4B58297203A700DABDFB /* ReportSelectRulesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B4B57297203A700DABDFB /* ReportSelectRulesView.swift */; };
@@ -160,6 +174,7 @@
 		D681E4D7246E32290053414F /* StatusActivityItemSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = D681E4D6246E32290053414F /* StatusActivityItemSource.swift */; };
 		D681E4D9246E346E0053414F /* AccountActivityItemSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = D681E4D8246E346E0053414F /* AccountActivityItemSource.swift */; };
 		D68232F72464F4FD00325FB8 /* ComposeDrawingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68232F62464F4FD00325FB8 /* ComposeDrawingViewController.swift */; };
+		D68245122BCA1F4000AFB38B /* NotificationLoadingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68245112BCA1F4000AFB38B /* NotificationLoadingViewController.swift */; };
 		D68329EF299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68329EE299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift */; };
 		D686BBE324FBF8110068E6AA /* WrappedProgressView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D686BBE224FBF8110068E6AA /* WrappedProgressView.swift */; };
 		D6895DC228D65274006341DA /* CustomAlertController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6895DC128D65274006341DA /* CustomAlertController.swift */; };
@@ -352,6 +367,13 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		D630C3D62BC61B6100208903 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = D6D4DDC4212518A000E1C4BB /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = D630C3D02BC61B6000208903;
+			remoteInfo = NotificationExtension;
+		};
 		D6A4531B29EF64BA00032932 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = D6D4DDC4212518A000E1C4BB /* Project object */;
@@ -390,6 +412,7 @@
 			dstSubfolderSpec = 13;
 			files = (
 				D6A4531D29EF64BA00032932 /* ShareExtension.appex in Embed Foundation Extensions */,
+				D630C3D82BC61B6100208903 /* NotificationExtension.appex in Embed Foundation Extensions */,
 				D6E343B4265AAD6B00C4AA01 /* OpenInTusker.appex in Embed Foundation Extensions */,
 			);
 			name = "Embed Foundation Extensions";
@@ -492,6 +515,12 @@
 		D62E9984279CA23900C26176 /* URLSession+Development.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "URLSession+Development.swift"; sourceTree = "<group>"; };
 		D62E9986279D094F00C26176 /* StatusMetaIndicatorsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusMetaIndicatorsView.swift; sourceTree = "<group>"; };
 		D62FF04723D7CDD700909D6E /* AttributedStringHelperTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttributedStringHelperTests.swift; sourceTree = "<group>"; };
+		D630C3C92BC59FF500208903 /* MastodonController+Push.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "MastodonController+Push.swift"; sourceTree = "<group>"; };
+		D630C3CB2BC5FD4600208903 /* GetAuthorizationTokenService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GetAuthorizationTokenService.swift; sourceTree = "<group>"; };
+		D630C3D12BC61B6000208903 /* NotificationExtension.appex */ = {isa = PBXFileReference; explicitFileType = "wrapper.app-extension"; includeInIndex = 0; path = NotificationExtension.appex; sourceTree = BUILT_PRODUCTS_DIR; };
+		D630C3D32BC61B6100208903 /* NotificationService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationService.swift; sourceTree = "<group>"; };
+		D630C3D52BC61B6100208903 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		D630C3D92BC61B6100208903 /* NotificationExtension.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = NotificationExtension.entitlements; sourceTree = "<group>"; };
 		D6311C4F25B3765B00B27539 /* ImageDataCache.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ImageDataCache.swift; sourceTree = "<group>"; };
 		D6333B362137838300CE884A /* AttributedString+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AttributedString+Helpers.swift"; sourceTree = "<group>"; };
 		D6333B782139AEFD00CE884A /* Date+TimeAgo.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Date+TimeAgo.swift"; sourceTree = "<group>"; };
@@ -521,12 +550,17 @@
 		D64AAE9026C80DC600FC57FB /* ToastView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ToastView.swift; sourceTree = "<group>"; };
 		D64AAE9426C88C5000FC57FB /* ToastableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ToastableViewController.swift; sourceTree = "<group>"; };
 		D64AAE9626C88DC400FC57FB /* ToastConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ToastConfiguration.swift; sourceTree = "<group>"; };
+		D64B967B2BC19C28002C8990 /* NotificationsPrefsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationsPrefsView.swift; sourceTree = "<group>"; };
+		D64B96802BC3279D002C8990 /* PrefsAccountView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrefsAccountView.swift; sourceTree = "<group>"; };
+		D64B96832BC3893C002C8990 /* PushSubscriptionView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PushSubscriptionView.swift; sourceTree = "<group>"; };
 		D64D0AB02128D9AE005A6F37 /* OnboardingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OnboardingViewController.swift; sourceTree = "<group>"; };
 		D64D8CA82463B494006B0BAA /* MultiThreadDictionary.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MultiThreadDictionary.swift; sourceTree = "<group>"; };
 		D651C5B32915B00400236EF6 /* ProfileFieldsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProfileFieldsView.swift; sourceTree = "<group>"; };
 		D6531DED246B81C9000F9538 /* GifvPlayerView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GifvPlayerView.swift; sourceTree = "<group>"; };
 		D6538944214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TableViewSwipeActionProvider.swift; sourceTree = "<group>"; };
 		D659F36129541065002D944A /* TTTView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TTTView.swift; sourceTree = "<group>"; };
+		D65A261C2BC39399005EB5D8 /* PushInstanceSettingsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PushInstanceSettingsView.swift; sourceTree = "<group>"; };
+		D65A26242BC39A02005EB5D8 /* PushNotifications */ = {isa = PBXFileReference; lastKnownFileType = wrapper; path = PushNotifications; sourceTree = "<group>"; };
 		D65B4B532971F71D00DABDFB /* EditedReport.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditedReport.swift; sourceTree = "<group>"; };
 		D65B4B552971F98300DABDFB /* ReportView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReportView.swift; sourceTree = "<group>"; };
 		D65B4B57297203A700DABDFB /* ReportSelectRulesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReportSelectRulesView.swift; sourceTree = "<group>"; };
@@ -562,6 +596,7 @@
 		D681E4D6246E32290053414F /* StatusActivityItemSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusActivityItemSource.swift; sourceTree = "<group>"; };
 		D681E4D8246E346E0053414F /* AccountActivityItemSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccountActivityItemSource.swift; sourceTree = "<group>"; };
 		D68232F62464F4FD00325FB8 /* ComposeDrawingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComposeDrawingViewController.swift; sourceTree = "<group>"; };
+		D68245112BCA1F4000AFB38B /* NotificationLoadingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationLoadingViewController.swift; sourceTree = "<group>"; };
 		D68329EE299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MoreTrendsFooterCollectionViewCell.swift; sourceTree = "<group>"; };
 		D686BBE224FBF8110068E6AA /* WrappedProgressView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WrappedProgressView.swift; sourceTree = "<group>"; };
 		D6895DC128D65274006341DA /* CustomAlertController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CustomAlertController.swift; sourceTree = "<group>"; };
@@ -764,6 +799,18 @@
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		D630C3CE2BC61B6000208903 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				D630C4252BC7845800208903 /* WebURL in Frameworks */,
+				D630C4232BC7842C00208903 /* HTMLStreamer in Frameworks */,
+				D630C3E52BC6313400208903 /* Pachyderm in Frameworks */,
+				D630C3DF2BC61C4900208903 /* PushNotifications in Frameworks */,
+				D630C3E12BC61C6700208903 /* UserAccounts in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		D6A4531029EF64BA00032932 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -781,6 +828,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				D6BD395929B64426005FFD2B /* ComposeUI in Frameworks */,
+				D630C3C82BC43AFD00208903 /* PushNotifications in Frameworks */,
 				D6FA94E129B52898006AAC51 /* InstanceFeatures in Frameworks */,
 				D635237129B78A7D009ED5E7 /* TuskerComponents in Frameworks */,
 				D674A50927F9128D00BA03AC /* Pachyderm in Frameworks */,
@@ -955,6 +1003,16 @@
 			path = Shortcuts;
 			sourceTree = "<group>";
 		};
+		D630C3D22BC61B6100208903 /* NotificationExtension */ = {
+			isa = PBXGroup;
+			children = (
+				D630C3D92BC61B6100208903 /* NotificationExtension.entitlements */,
+				D630C3D32BC61B6100208903 /* NotificationService.swift */,
+				D630C3D52BC61B6100208903 /* Info.plist */,
+			);
+			path = NotificationExtension;
+			sourceTree = "<group>";
+		};
 		D6370B9924421FE00092A7FF /* CoreData */ = {
 			isa = PBXGroup;
 			children = (
@@ -1089,6 +1147,7 @@
 				D646DCD72A07F3500059ECEB /* FollowRequestNotificationCollectionViewCell.swift */,
 				D646DCD92A081A2C0059ECEB /* PollFinishedNotificationCollectionViewCell.swift */,
 				D646DCDB2A081CF10059ECEB /* StatusUpdatedNotificationCollectionViewCell.swift */,
+				D68245112BCA1F4000AFB38B /* NotificationLoadingViewController.swift */,
 			);
 			path = Notifications;
 			sourceTree = "<group>";
@@ -1108,6 +1167,7 @@
 			children = (
 				D63661BF2381C144004B9E16 /* PreferencesNavigationController.swift */,
 				04586B4022B2FFB10021BD04 /* PreferencesView.swift */,
+				D64B96802BC3279D002C8990 /* PrefsAccountView.swift */,
 				04586B4222B301470021BD04 /* AppearancePrefsView.swift */,
 				D61F75892932E1FC00C0B37F /* SwipeActionsPrefsView.swift */,
 				D6958F3C2AA383D90062FE52 /* WidescreenNavigationPrefsView.swift */,
@@ -1119,6 +1179,7 @@
 				0427033922B31269000D31B6 /* AdvancedPrefsView.swift */,
 				D67895BF246870DE00D4CD9E /* LocalAccountAvatarView.swift */,
 				D68A76ED295369C7001DA1B3 /* AcknowledgementsView.swift */,
+				D64B96822BC3892B002C8990 /* Notifications */,
 				D60089172981FEA4005B4D00 /* Tip Jar */,
 				D68A76EF2953910A001DA1B3 /* About */,
 			);
@@ -1167,6 +1228,7 @@
 				D6CA6ED029EF6060003EC5DF /* TuskerPreferences */,
 				D6A9E04F29F8917500BEDC7E /* MatchedGeometryPresentation */,
 				D642E83D2BA7AD0F004BFD6A /* GalleryVC */,
+				D65A26242BC39A02005EB5D8 /* PushNotifications */,
 			);
 			path = Packages;
 			sourceTree = "<group>";
@@ -1181,6 +1243,16 @@
 			path = Toast;
 			sourceTree = "<group>";
 		};
+		D64B96822BC3892B002C8990 /* Notifications */ = {
+			isa = PBXGroup;
+			children = (
+				D64B967B2BC19C28002C8990 /* NotificationsPrefsView.swift */,
+				D65A261C2BC39399005EB5D8 /* PushInstanceSettingsView.swift */,
+				D64B96832BC3893C002C8990 /* PushSubscriptionView.swift */,
+			);
+			path = Notifications;
+			sourceTree = "<group>";
+		};
 		D65A37F221472F300087646E /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
@@ -1461,6 +1533,7 @@
 				D6D4DDEE212518A200E1C4BB /* TuskerUITests */,
 				D6E343A9265AAD6B00C4AA01 /* OpenInTusker */,
 				D6A4531429EF64BA00032932 /* ShareExtension */,
+				D630C3D22BC61B6100208903 /* NotificationExtension */,
 				D6D4DDCD212518A000E1C4BB /* Products */,
 				D65A37F221472F300087646E /* Frameworks */,
 			);
@@ -1474,6 +1547,7 @@
 				D6D4DDEB212518A200E1C4BB /* TuskerUITests.xctest */,
 				D6E343A8265AAD6B00C4AA01 /* OpenInTusker.appex */,
 				D6A4531329EF64BA00032932 /* ShareExtension.appex */,
+				D630C3D12BC61B6000208903 /* NotificationExtension.appex */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -1627,6 +1701,7 @@
 			isa = PBXGroup;
 			children = (
 				D6F953EF21251A2900CF0F2B /* MastodonController.swift */,
+				D630C3C92BC59FF500208903 /* MastodonController+Push.swift */,
 				D61ABEFD28F1C92600B29151 /* FavoriteService.swift */,
 				D621733228F1D5ED004C7DB1 /* ReblogService.swift */,
 				D6F6A54F291F058600F496A8 /* CreateListService.swift */,
@@ -1641,6 +1716,7 @@
 				D65B4B6529773AE600DABDFB /* DeleteStatusService.swift */,
 				D6DD8FFC298495A8002AD3FD /* LogoutService.swift */,
 				D6D79F252A0C8D2700AB2315 /* FetchStatusSourceService.swift */,
+				D630C3CB2BC5FD4600208903 /* GetAuthorizationTokenService.swift */,
 			);
 			path = API;
 			sourceTree = "<group>";
@@ -1648,6 +1724,30 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		D630C3D02BC61B6000208903 /* NotificationExtension */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = D630C3DA2BC61B6100208903 /* Build configuration list for PBXNativeTarget "NotificationExtension" */;
+			buildPhases = (
+				D630C3CD2BC61B6000208903 /* Sources */,
+				D630C3CE2BC61B6000208903 /* Frameworks */,
+				D630C3CF2BC61B6000208903 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = NotificationExtension;
+			packageProductDependencies = (
+				D630C3DE2BC61C4900208903 /* PushNotifications */,
+				D630C3E02BC61C6700208903 /* UserAccounts */,
+				D630C3E42BC6313400208903 /* Pachyderm */,
+				D630C4222BC7842C00208903 /* HTMLStreamer */,
+				D630C4242BC7845800208903 /* WebURL */,
+			);
+			productName = NotificationExtension;
+			productReference = D630C3D12BC61B6000208903 /* NotificationExtension.appex */;
+			productType = "com.apple.product-type.app-extension";
+		};
 		D6A4531229EF64BA00032932 /* ShareExtension */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = D6A4532229EF64BA00032932 /* Build configuration list for PBXNativeTarget "ShareExtension" */;
@@ -1689,6 +1789,7 @@
 			dependencies = (
 				D6E343B3265AAD6B00C4AA01 /* PBXTargetDependency */,
 				D6A4531C29EF64BA00032932 /* PBXTargetDependency */,
+				D630C3D72BC61B6100208903 /* PBXTargetDependency */,
 			);
 			name = Tusker;
 			packageProductDependencies = (
@@ -1705,6 +1806,7 @@
 				D6CA6ED129EF6091003EC5DF /* TuskerPreferences */,
 				D60BB3932B30076F00DAEA65 /* HTMLStreamer */,
 				D6934F2B2BA7AD32002B1C8D /* GalleryVC */,
+				D630C3C72BC43AFD00208903 /* PushNotifications */,
 			);
 			productName = Tusker;
 			productReference = D6D4DDCC212518A000E1C4BB /* Tusker.app */;
@@ -1773,10 +1875,13 @@
 			isa = PBXProject;
 			attributes = {
 				BuildIndependentTargetsInParallel = YES;
-				LastSwiftUpdateCheck = 1430;
+				LastSwiftUpdateCheck = 1530;
 				LastUpgradeCheck = 1500;
 				ORGANIZATIONNAME = Shadowfacts;
 				TargetAttributes = {
+					D630C3D02BC61B6000208903 = {
+						CreatedOnToolsVersion = 15.3;
+					};
 					D6A4531229EF64BA00032932 = {
 						CreatedOnToolsVersion = 14.3;
 					};
@@ -1829,11 +1934,19 @@
 				D6D4DDEA212518A200E1C4BB /* TuskerUITests */,
 				D6E343A7265AAD6B00C4AA01 /* OpenInTusker */,
 				D6A4531229EF64BA00032932 /* ShareExtension */,
+				D630C3D02BC61B6000208903 /* NotificationExtension */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXResourcesBuildPhase section */
+		D630C3CF2BC61B6000208903 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		D6A4531129EF64BA00032932 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -1934,6 +2047,14 @@
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		D630C3CD2BC61B6000208903 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				D630C3D42BC61B6100208903 /* NotificationService.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		D6A4530F29EF64BA00032932 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -2036,12 +2157,14 @@
 				D667E5F82135C3040057A976 /* Mastodon+Equatable.swift in Sources */,
 				D6B4A4FF2506B81A000C81C1 /* AccountDisplayNameView.swift in Sources */,
 				D63D8DF42850FE7A008D95E1 /* ViewTags.swift in Sources */,
+				D630C3CC2BC5FD4600208903 /* GetAuthorizationTokenService.swift in Sources */,
 				D61DC84B28F4FD2000B82C6E /* ProfileHeaderCollectionViewCell.swift in Sources */,
 				D61A45E828DF477D002BE511 /* LoadingCollectionViewCell.swift in Sources */,
 				D6934F3A2BA8F3D7002B1C8D /* FallbackGalleryContentViewController.swift in Sources */,
 				D67B506D250B291200FAECFB /* BlurHashDecode.swift in Sources */,
 				D68A76EC295369A8001DA1B3 /* AboutView.swift in Sources */,
 				04DACE8E212CC7CC009840C4 /* ImageCache.swift in Sources */,
+				D68245122BCA1F4000AFB38B /* NotificationLoadingViewController.swift in Sources */,
 				D646DCAE2A06C8C90059ECEB /* ProfileFieldVerificationView.swift in Sources */,
 				D61F75AD293AF39000C0B37F /* Filter+Helpers.swift in Sources */,
 				D6531DEE246B81C9000F9538 /* GifvPlayerView.swift in Sources */,
@@ -2065,11 +2188,13 @@
 				D68329EF299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift in Sources */,
 				D623A5412635FB3C0095BD04 /* PollOptionView.swift in Sources */,
 				D61F75B1293BD85300C0B37F /* CreateFilterService.swift in Sources */,
+				D65A261D2BC39399005EB5D8 /* PushInstanceSettingsView.swift in Sources */,
 				D65C6BF525478A9C00A6E89C /* BackgroundableViewController.swift in Sources */,
 				D61DC84D28F500D200B82C6E /* ProfileViewController.swift in Sources */,
 				D600891F29848DE2005B4D00 /* AddInstancePinnedTimelineView.swift in Sources */,
 				D693A72F25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.swift in Sources */,
 				D627943223A5466600D38C68 /* SelectableTableViewCell.swift in Sources */,
+				D64B96812BC3279D002C8990 /* PrefsAccountView.swift in Sources */,
 				D6EAE0DB2550CC8A002DB0AC /* FocusableTextField.swift in Sources */,
 				D646DCD62A07ED970059ECEB /* FollowNotificationGroupCollectionViewCell.swift in Sources */,
 				D623A53D2635F5590095BD04 /* StatusPollView.swift in Sources */,
@@ -2201,10 +2326,12 @@
 				D6BEA247291A0F2D002F4D01 /* Duckable+Root.swift in Sources */,
 				D6C1B2082545D1EC00DAAA66 /* StatusCardView.swift in Sources */,
 				D64D8CA92463B494006B0BAA /* MultiThreadDictionary.swift in Sources */,
+				D630C3CA2BC59FF500208903 /* MastodonController+Push.swift in Sources */,
 				D6F6A554291F0D9600F496A8 /* DeleteListService.swift in Sources */,
 				D68E6F5F253C9B2D001A1B4C /* BaseEmojiLabel.swift in Sources */,
 				D6F0B12B24A3071C001E48C3 /* MainSplitViewController.swift in Sources */,
 				D6AEBB3E2321638100E5038B /* UIActivity+Types.swift in Sources */,
+				D64B967C2BC19C28002C8990 /* NotificationsPrefsView.swift in Sources */,
 				D61AC1D5232E9FA600C54D2D /* InstanceSelectorTableViewController.swift in Sources */,
 				D6CF5B892AC9BA6E00F15D83 /* MastodonSearchController.swift in Sources */,
 				D681E4D9246E346E0053414F /* AccountActivityItemSource.swift in Sources */,
@@ -2219,6 +2346,7 @@
 				D6C3F5172991C1A00009FCFF /* View+AppListStyle.swift in Sources */,
 				D65B4B6A297777D900DABDFB /* StatusNotFoundView.swift in Sources */,
 				D6412B0924B0291E00F5412E /* MyProfileViewController.swift in Sources */,
+				D64B96842BC3893C002C8990 /* PushSubscriptionView.swift in Sources */,
 				D6CF5B832AC65DDF00F15D83 /* NSCollectionLayoutSection+Readable.swift in Sources */,
 				D601FA5D297B2E6F00A8E8B5 /* ConversationCollectionViewController.swift in Sources */,
 				D6D12B56292D57E800D528E1 /* AccountCollectionViewCell.swift in Sources */,
@@ -2275,6 +2403,11 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		D630C3D72BC61B6100208903 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = D630C3D02BC61B6000208903 /* NotificationExtension */;
+			targetProxy = D630C3D62BC61B6100208903 /* PBXContainerItemProxy */;
+		};
 		D6A4531C29EF64BA00032932 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = D6A4531229EF64BA00032932 /* ShareExtension */;
@@ -2333,6 +2466,100 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
+		D630C3DB2BC61B6100208903 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CODE_SIGN_ENTITLEMENTS = NotificationExtension/NotificationExtension.entitlements;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_STYLE = Automatic;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = NotificationExtension/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = space.vaccor.Tusker.NotificationExtension;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SUPPORTS_MACCATALYST = YES;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		D630C3DC2BC61B6100208903 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CODE_SIGN_ENTITLEMENTS = NotificationExtension/NotificationExtension.entitlements;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_STYLE = Automatic;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = NotificationExtension/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = space.vaccor.Tusker.NotificationExtension;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SUPPORTS_MACCATALYST = YES;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Release;
+		};
+		D630C3DD2BC61B6100208903 /* Dist */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CODE_SIGN_ENTITLEMENTS = NotificationExtension/NotificationExtension.entitlements;
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_STYLE = Automatic;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = NotificationExtension/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = NotificationExtension;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "Copyright © 2024 Shadowfacts. All rights reserved.";
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = space.vaccor.Tusker.NotificationExtension;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SUPPORTS_MACCATALYST = YES;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Dist;
+		};
 		D63CC705290ECE77000E19DE /* Dist */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = D63CC703290EC472000E19DE /* Dist.xcconfig */;
@@ -2897,6 +3124,16 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		D630C3DA2BC61B6100208903 /* Build configuration list for PBXNativeTarget "NotificationExtension" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				D630C3DB2BC61B6100208903 /* Debug */,
+				D630C3DC2BC61B6100208903 /* Release */,
+				D630C3DD2BC61B6100208903 /* Dist */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		D6A4532229EF64BA00032932 /* Build configuration list for PBXNativeTarget "ShareExtension" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
@@ -3004,6 +3241,32 @@
 			isa = XCSwiftPackageProductDependency;
 			productName = Pachyderm;
 		};
+		D630C3C72BC43AFD00208903 /* PushNotifications */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = PushNotifications;
+		};
+		D630C3DE2BC61C4900208903 /* PushNotifications */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = PushNotifications;
+		};
+		D630C3E02BC61C6700208903 /* UserAccounts */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = UserAccounts;
+		};
+		D630C3E42BC6313400208903 /* Pachyderm */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = Pachyderm;
+		};
+		D630C4222BC7842C00208903 /* HTMLStreamer */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = D60BB3922B30076F00DAEA65 /* XCRemoteSwiftPackageReference "HTMLStreamer" */;
+			productName = HTMLStreamer;
+		};
+		D630C4242BC7845800208903 /* WebURL */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = D6676CA127A8D0020052936B /* XCRemoteSwiftPackageReference "swift-url" */;
+			productName = WebURL;
+		};
 		D635237029B78A7D009ED5E7 /* TuskerComponents */ = {
 			isa = XCSwiftPackageProductDependency;
 			productName = TuskerComponents;

Tusker/API/GetAuthorizationTokenService.swift

@@ -0,0 +1,63 @@
+//
+//  GetAuthorizationTokenService.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/9/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+import AuthenticationServices
+
+class GetAuthorizationTokenService {
+    let instanceURL: URL
+    let clientID: String
+    let presentationContextProvider: ASWebAuthenticationPresentationContextProviding
+    
+    init(instanceURL: URL, clientID: String, presentationContextProvider: ASWebAuthenticationPresentationContextProviding) {
+        self.instanceURL = instanceURL
+        self.clientID = clientID
+        self.presentationContextProvider = presentationContextProvider
+    }
+    
+    @MainActor
+    func run() async throws -> String {
+        var components = URLComponents(url: instanceURL, resolvingAgainstBaseURL: false)!
+        components.path = "/oauth/authorize"
+        components.queryItems = [
+            URLQueryItem(name: "client_id", value: clientID),
+            URLQueryItem(name: "response_type", value: "code"),
+            URLQueryItem(name: "scope", value: MastodonController.oauthScopes.map(\.rawValue).joined(separator: " ")),
+            URLQueryItem(name: "redirect_uri", value: "tusker://oauth")
+        ]
+        let authorizeURL = components.url!
+        
+        return try await withCheckedThrowingContinuation({ continuation in
+            let authenticationSession = ASWebAuthenticationSession(url: authorizeURL, callbackURLScheme: "tusker", completionHandler: { url, error in
+                if let error = error {
+                    if (error as? ASWebAuthenticationSessionError)?.code == .canceledLogin {
+                        continuation.resume(throwing: Error.cancelled)
+                    } else {
+                        continuation.resume(throwing: error)
+                    }
+                } else if let url = url,
+                          let components = URLComponents(url: url, resolvingAgainstBaseURL: true),
+                          let item = components.queryItems?.first(where: { $0.name == "code" }),
+                          let code = item.value {
+                    continuation.resume(returning: code)
+                } else {
+                    continuation.resume(throwing: Error.noAuthorizationCode)
+                }
+            })
+            // Prefer ephemeral sessions to make it easier to sign into multiple accounts on the same instance.
+            authenticationSession.prefersEphemeralWebBrowserSession = true
+            authenticationSession.presentationContextProvider = presentationContextProvider
+            authenticationSession.start()
+        })
+    }
+    
+    enum Error: Swift.Error {
+        case cancelled
+        case noAuthorizationCode
+    }
+}

Tusker/API/LogoutService.swift

@@ -8,6 +8,8 @@
 
 import Foundation
 import UserAccounts
+import PushNotifications
+import Pachyderm
 
 @MainActor
 class LogoutService {
@@ -20,7 +22,12 @@ class LogoutService {
     }
     
     func run() {
+        let accountInfo = self.accountInfo
         Task.detached {
+            if await PushManager.shared.pushSubscription(account: accountInfo) != nil {
+                _ = try? await self.mastodonController.run(Pachyderm.PushSubscription.delete())
+                await PushManager.shared.removeSubscription(account: accountInfo)
+            }
             try? await self.mastodonController.client.revokeAccessToken()
         }
         MastodonController.removeForAccount(accountInfo)

Tusker/API/MastodonController+Push.swift

@@ -0,0 +1,71 @@
+//
+//  MastodonController+Push.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/9/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+import Pachyderm
+import PushNotifications
+import CryptoKit
+
+extension MastodonController {
+    func createPushSubscription(subscription: PushNotifications.PushSubscription) async throws -> Pachyderm.PushSubscription {
+        let req = Pachyderm.PushSubscription.create(
+            endpoint: subscription.endpoint,
+            // mastodon docs just say "Base64 encoded string of a public key from a ECDH keypair using the prime256v1 curve."
+            // other apps use SecKeyCopyExternalRepresentation which is documented to use X9.63 for elliptic curve keys
+            // and that seems to work
+            publicKey: subscription.secretKey.publicKey.x963Representation,
+            authSecret: subscription.authSecret,
+            alerts: .init(subscription.alerts),
+            policy: .init(subscription.policy)
+        )
+        return try await run(req).0
+    }
+    
+    func updatePushSubscription(subscription: PushNotifications.PushSubscription) async throws -> Pachyderm.PushSubscription {
+        // when updating anything other than the alerts/policy, we need to go through the create route
+        return try await createPushSubscription(subscription: subscription)
+    }
+
+    func updatePushSubscription(alerts: PushNotifications.PushSubscription.Alerts, policy: PushNotifications.PushSubscription.Policy) async throws -> Pachyderm.PushSubscription {
+        let req = Pachyderm.PushSubscription.update(alerts: .init(alerts), policy: .init(policy))
+        return try await run(req).0
+    }
+    
+    func deletePushSubscription() async throws {
+        let req = Pachyderm.PushSubscription.delete()
+        _ = try await run(req)
+    }
+}
+
+private extension Pachyderm.PushSubscription.Alerts {
+    init(_ alerts: PushNotifications.PushSubscription.Alerts) {
+        self.init(
+            mention: alerts.contains(.mention),
+            status: alerts.contains(.status),
+            reblog: alerts.contains(.reblog),
+            follow: alerts.contains(.follow),
+            followRequest: alerts.contains(.followRequest),
+            favourite: alerts.contains(.favorite),
+            poll: alerts.contains(.poll),
+            update: alerts.contains(.update)
+        )
+    }
+}
+
+private extension Pachyderm.PushSubscription.Policy {
+    init(_ policy: PushNotifications.PushSubscription.Policy) {
+        switch policy {
+        case .all:
+            self = .all
+        case .followers:
+            self = .followers
+        case .followed:
+            self = .followed
+        }
+    }
+}

Tusker/API/MastodonController.swift

@@ -17,28 +17,29 @@ import Sentry
 import ComposeUI
 import OSLog
 
-private let oauthScopes = [Scope.read, .write, .follow]
 private let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "MastodonController")
 
 final class MastodonController: ObservableObject, Sendable {
+    
+    static let oauthScopes = [Scope.read, .write, .follow, .push]
 
     @MainActor
-    static private(set) var all = [UserAccountInfo: MastodonController]()
+    static private(set) var all = [String: MastodonController]()
     
     @MainActor
     static func getForAccount(_ account: UserAccountInfo) -> MastodonController {
-        if let controller = all[account] {
+        if let controller = all[account.id] {
             return controller
         } else {
             let controller = MastodonController(instanceURL: account.instanceURL, accountInfo: account)
-            all[account] = controller
+            all[account.id] = controller
             return controller
         }
     }
     
     @MainActor
     static func removeForAccount(_ account: UserAccountInfo) {
-        all.removeValue(forKey: account)
+        all.removeValue(forKey: account.id)
     }
     
     @MainActor
@@ -172,13 +173,14 @@ final class MastodonController: ObservableObject, Sendable {
     }
     
     /// - Returns: A tuple of client ID and client secret.
-    func registerApp() async throws -> (String, String) {
-        if let clientID = client.clientID,
+    func registerApp(reregister: Bool = false) async throws -> (String, String) {
+        if !reregister,
+           let clientID = client.clientID,
            let clientSecret = client.clientSecret {
             return (clientID, clientSecret)
         } else {
             let app: RegisteredApplication = try await withCheckedThrowingContinuation({ continuation in
-                client.registerApp(name: "Tusker", redirectURI: "tusker://oauth", scopes: oauthScopes) { response in
+                client.registerApp(name: "Tusker", redirectURI: "tusker://oauth", scopes: MastodonController.oauthScopes) { response in
                     switch response {
                     case .failure(let error):
                         continuation.resume(throwing: error)
@@ -196,7 +198,7 @@ final class MastodonController: ObservableObject, Sendable {
     /// - Returns: The access token
     func authorize(authorizationCode: String) async throws -> String {
         return try await withCheckedThrowingContinuation({ continuation in
-            client.getAccessToken(authorizationCode: authorizationCode, redirectURI: "tusker://oauth", scopes: oauthScopes) { response in
+            client.getAccessToken(authorizationCode: authorizationCode, redirectURI: "tusker://oauth", scopes: MastodonController.oauthScopes) { response in
                 switch response {
                 case .failure(let error):
                     continuation.resume(throwing: error)

Tusker/AppDelegate.swift

@@ -15,6 +15,7 @@ import Sentry
 import UserAccounts
 import ComposeUI
 import TuskerPreferences
+import PushNotifications
 
 typealias Preferences = TuskerPreferences.Preferences
 
@@ -83,12 +84,15 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         
         BackgroundManager.shared.registerHandlers()
         
+        initializePushNotifications()
+        
         return true
     }
     
     #if canImport(Sentry)
     private func configureSentry() {
-        guard let dsn = Bundle.main.object(forInfoDictionaryKey: "SentryDSN") as? String,
+        guard let info = Bundle.main.object(forInfoDictionaryKey: "TuskerInfo") as? [String: Any],
+              let dsn = info["SentryDSN"] as? String,
               !dsn.isEmpty else {
             return
         }
@@ -155,7 +159,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
              .search,
              .bookmarks,
              .myProfile,
-             .showProfile:
+             .showProfile,
+             .showNotification:
             if activity.displaysAuxiliaryScene {
                 stateRestorationLogger.info("Using auxiliary scene for \(type.rawValue, privacy: .public)")
                 return "auxiliary"
@@ -168,6 +173,35 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         }
     }
     
+    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
+        PushManager.shared.didRegisterForRemoteNotifications(deviceToken: deviceToken)
+    }
+    
+    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: any Error) {
+        PushManager.shared.didFailToRegisterForRemoteNotifications(error: error)
+    }
+    
+    private func initializePushNotifications() {
+        UNUserNotificationCenter.current().delegate = self
+        Task {
+            PushManager.captureError = { SentrySDK.capture(error: $0) }
+            await PushManager.shared.updateIfNecessary(updateSubscription: {
+                guard let account = UserAccountsManager.shared.getAccount(id: $0.accountID) else {
+                    return false
+                }
+                let mastodonController = MastodonController.getForAccount(account)
+                do {
+                    let result = try await mastodonController.updatePushSubscription(subscription: $0)
+                    PushManager.logger.debug("Updated push subscription \(result.id) on \(mastodonController.instanceURL)")
+                    return true
+                } catch {
+                    PushManager.logger.error("Error updating push subscription: \(String(describing: error))")
+                    return false
+                }
+            })
+        }
+    }
+    
     #if !os(visionOS)
     private func swizzleStatusBar() {
         let selector = Selector(("handleTapAction:"))
@@ -223,3 +257,52 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     #endif
 
 }
+
+extension AppDelegate: UNUserNotificationCenterDelegate {
+    func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {
+        let mainSceneDelegate: MainSceneDelegate
+        if let delegate = UIApplication.shared.activeScene?.delegate as? MainSceneDelegate {
+            mainSceneDelegate = delegate
+        } else if let scene = UIApplication.shared.connectedScenes.first(where: { $0.delegate is MainSceneDelegate }) {
+            mainSceneDelegate = scene.delegate as! MainSceneDelegate
+        } else if let accountID = UserAccountsManager.shared.mostRecentAccountID {
+            let activity = UserActivityManager.mainSceneActivity(accountID: accountID)
+            activity.addUserInfoEntries(from: ["showNotificationsPreferences": true])
+            UIApplication.shared.requestSceneSessionActivation(nil, userActivity: activity, options: nil)
+            return
+        } else {
+            // without an account, we can't do anything
+            return
+        }
+        mainSceneDelegate.showNotificationsPreferences()
+    }
+    
+    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
+        completionHandler(.banner)
+    }
+    
+    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
+        let userInfo = response.notification.request.content.userInfo
+        guard let notificationID = userInfo["notificationID"] as? String,
+              let accountID = userInfo["accountID"] as? String,
+              let account = UserAccountsManager.shared.getAccount(id: accountID) else {
+            return
+        }
+        if let scene = response.targetScene,
+           let delegate = scene.delegate as? MainSceneDelegate,
+           let rootViewController = delegate.rootViewController {
+            let mastodonController = MastodonController.getForAccount(account)
+            
+            // if the scene is already active, then we animate the account switching if necessary
+            delegate.activateAccount(account, animated: scene.activationState == .foregroundActive)
+            
+            rootViewController.select(route: .notifications, animated: false)
+            let vc = NotificationLoadingViewController(notificationID: notificationID, mastodonController: mastodonController)
+            rootViewController.getNavigationController().pushViewController(vc, animated: false)
+        } else {
+            let activity = UserActivityManager.showNotificationActivity(id: notificationID, accountID: accountID)
+            UIApplication.shared.requestSceneSessionActivation(nil, userActivity: activity, options: nil)
+        }
+        completionHandler()
+    }
+}

Tusker/CoreData/MastodonCachePersistentStore.swift

@@ -377,9 +377,7 @@ class MastodonCachePersistentStore: NSPersistentCloudKitContainer {
     func addAll(notifications: [Pachyderm.Notification], completion: (() -> Void)? = nil) {
         backgroundContext.perform {
             let statuses = notifications.compactMap { $0.status }
-            // filter out mentions, otherwise we would double increment the reference count of those accounts
-            // since the status has the same account as the notification
-            let accounts = notifications.filter { $0.kind != .mention }.map { $0.account }
+            let accounts = notifications.map { $0.account }
             statuses.forEach { self.upsert(status: $0, context: self.backgroundContext) }
             accounts.forEach { self.upsert(account: $0, in: self.backgroundContext) }
             self.save(context: self.backgroundContext)

Tusker/Extensions/MainActor+Unsafe.swift

@@ -47,6 +47,10 @@ public extension MainActor {
     ///
     /// It will crash if run on any non-main thread.
     @_unavailableFromAsync
+    @available(macOS, obsoleted: 14.0)
+    @available(iOS, obsoleted: 17.0)
+    @available(watchOS, obsoleted: 10.0)
+    @available(tvOS, obsoleted: 17.0)
     static func runUnsafely<T>(_ body: @MainActor () throws -> T) rethrows -> T {
         if #available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *) {
             return try MainActor.assumeIsolated(body)

Tusker/HTMLConverter.swift

@@ -36,6 +36,7 @@ class HTMLConverter {
 }
 
 extension HTMLConverter {
+    // note: this is duplicated in NotificationExtension
     struct Callbacks: HTMLConversionCallbacks {
         static func makeURL(string: String) -> URL? {
             // Converting WebURL to URL is a small but non-trivial expense (since it works by

Tusker/Info.plist

@@ -49,13 +49,7 @@
 	<key>NSAppTransportSecurity</key>
 	<dict>
 		<key>NSExceptionDomains</key>
-		<dict>
-			<key>localhost</key>
-			<dict>
-				<key>NSExceptionAllowsInsecureHTTPLoads</key>
-				<true/>
-			</dict>
-		</dict>
+		<dict/>
 	</dict>
 	<key>NSCameraUsageDescription</key>
 	<string>Post photos and videos from the camera.</string>
@@ -67,6 +61,7 @@
 	<string>Post photos from the photo library.</string>
 	<key>NSUserActivityTypes</key>
 	<array>
+		<string>INSendMessageIntent</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.show-conversation</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.show-timeline</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.check-notifications</string>
@@ -76,6 +71,7 @@
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.my-profile</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.show-profile</string>
 		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.main-scene</string>
+		<string>$(PRODUCT_BUNDLE_IDENTIFIER).activity.show-notification</string>
 	</array>
 	<key>OSLogPreferences</key>
 	<dict>
@@ -106,8 +102,13 @@
 			</dict>
 		</dict>
 	</dict>
-	<key>SentryDSN</key>
-	<string>$(SENTRY_DSN)</string>
+	<key>TuskerInfo</key>
+	<dict>
+		<key>PushProxyHost</key>
+		<string>$(TUSKER_PUSH_PROXY_HOST)</string>
+		<key>SentryDSN</key>
+		<string>$(SENTRY_DSN)</string>
+	</dict>
 	<key>UIApplicationSceneManifest</key>
 	<dict>
 		<key>UIApplicationSupportsMultipleScenes</key>

Tusker/Scenes/MainSceneDelegate.swift

@@ -208,6 +208,10 @@ class MainSceneDelegate: UIResponder, UIWindowSceneDelegate, TuskerSceneDelegate
     }
     
     func activateAccount(_ account: UserAccountInfo, animated: Bool) {
+        guard (window?.rootViewController as? AccountSwitchingContainerViewController)?.currentAccountID != account.id else {
+            return
+        }
+        
         let oldMostRecentAccount = UserAccountsManager.shared.mostRecentAccountID
         UserAccountsManager.shared.setMostRecentAccount(account)
         window!.windowScene!.session.mastodonController = MastodonController.getForAccount(account)
@@ -283,6 +287,16 @@ class MainSceneDelegate: UIResponder, UIWindowSceneDelegate, TuskerSceneDelegate
         }
     }
     
+    func showNotificationsPreferences() {
+        let preferencesVC: PreferencesNavigationController?
+        if let presented = rootViewController?.presentedViewController as? PreferencesNavigationController {
+            preferencesVC = presented
+        } else {
+            preferencesVC = rootViewController?.presentPreferences(completion: nil)
+        }
+        preferencesVC?.navigationState.showNotificationPreferences = true
+    }
+    
 }
 
 extension MainSceneDelegate: OnboardingViewControllerDelegate {

Tusker/Screens/Main/AccountSwitchingContainerViewController.swift

@@ -20,7 +20,7 @@ protocol AccountSwitchableViewController: TuskerRootViewController {
 
 class AccountSwitchingContainerViewController: UIViewController {
 
-    private var currentAccountID: String
+    private(set) var currentAccountID: String
     private(set) var root: AccountSwitchableViewController
     
     private var userActivities: [String: NSUserActivity] = [:]
@@ -152,9 +152,9 @@ extension AccountSwitchingContainerViewController: TuskerRootViewController {
         root.performSearch(query: query)
     }
     
-    func presentPreferences(completion: (() -> Void)?) {
+    func presentPreferences(completion: (() -> Void)?) -> PreferencesNavigationController? {
         loadViewIfNeeded()
-        root.presentPreferences(completion: completion)
+        return root.presentPreferences(completion: completion)
     }
     
     func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {

Tusker/Screens/Main/Duckable+Root.swift

@@ -47,7 +47,7 @@ extension DuckableContainerViewController: AccountSwitchableViewController {
         (child as? TuskerRootViewController)?.performSearch(query: query)
     }
     
-    func presentPreferences(completion: (() -> Void)?) {
+    func presentPreferences(completion: (() -> Void)?) -> PreferencesNavigationController? {
         (child as? TuskerRootViewController)?.presentPreferences(completion: completion)
     }
     

Tusker/Screens/Main/MainSplitViewController.swift

@@ -623,8 +623,10 @@ extension MainSplitViewController: TuskerRootViewController {
         searchViewController.resultsController.performSearch(query: query)
     }
     
-    func presentPreferences(completion: (() -> Void)?) {
-        present(PreferencesNavigationController(mastodonController: mastodonController), animated: true, completion: completion)
+    func presentPreferences(completion: (() -> Void)?) -> PreferencesNavigationController? {
+        let vc = PreferencesNavigationController(mastodonController: mastodonController)
+        present(vc, animated: true, completion: completion)
+        return vc
     }
     
     func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {

Tusker/Screens/Main/MainTabBarViewController.swift

@@ -342,8 +342,10 @@ extension MainTabBarViewController: TuskerRootViewController {
         exploreController.resultsController.performSearch(query: query)
     }
     
-    func presentPreferences(completion: (() -> Void)?) {
-        present(PreferencesNavigationController(mastodonController: mastodonController), animated: true, completion: completion)
+    func presentPreferences(completion: (() -> Void)?) -> PreferencesNavigationController? {
+        let vc = PreferencesNavigationController(mastodonController: mastodonController)
+        present(vc, animated: true, completion: completion)
+        return vc
     }
     
     func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {

Tusker/Screens/Main/TuskerRootViewController.swift

@@ -17,7 +17,8 @@ protocol TuskerRootViewController: UIViewController, StateRestorableViewControll
     func getNavigationDelegate() -> TuskerNavigationDelegate?
     func getNavigationController() -> NavigationControllerProtocol
     func performSearch(query: String)
-    func presentPreferences(completion: (() -> Void)?)
+    @discardableResult
+    func presentPreferences(completion: (() -> Void)?) -> PreferencesNavigationController?
 }
 
 //extension TuskerRootViewController {

Tusker/Screens/Notifications/NotificationLoadingViewController.swift

@@ -0,0 +1,155 @@
+//
+//  NotificationLoadingViewController.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/12/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+import Pachyderm
+
+class NotificationLoadingViewController: UIViewController {
+    
+    private let notificationID: String
+    private let mastodonController: MastodonController
+    
+    init(notificationID: String, mastodonController: MastodonController) {
+        self.notificationID = notificationID
+        self.mastodonController = mastodonController
+        
+        super.init(nibName: nil, bundle: nil)
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        view.backgroundColor = .secondarySystemBackground
+        
+        let indicator = UIActivityIndicatorView(style: .medium)
+        indicator.startAnimating()
+        indicator.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(indicator)
+        NSLayoutConstraint.activate([
+            indicator.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),
+            indicator.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),
+        ])
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        Task {
+            let request = Client.getNotification(id: notificationID)
+            do {
+                let (notification, _) = try await mastodonController.run(request)
+                await withCheckedContinuation { continuation in
+                    mastodonController.persistentContainer.addAll(notifications: [notification]) {
+                        continuation.resume()
+                    }
+                }
+                showNotification(notification)
+            } catch {
+                showLoadingError(error)
+            }
+        }
+    }
+    
+    private func showNotification(_ notification: Pachyderm.Notification) {
+        let vc: UIViewController
+        switch notification.kind {
+        case .mention, .status, .poll, .update:
+            guard let statusID = notification.status?.id else {
+                showLoadingError(Error.missingStatus)
+                return
+            }
+            vc = ConversationViewController(for: statusID, state: .unknown, mastodonController: mastodonController)
+        case .reblog, .favourite:
+            guard let statusID = notification.status?.id else {
+                showLoadingError(Error.missingStatus)
+                return
+            }
+            let actionType = notification.kind == .reblog ? StatusActionAccountListViewController.ActionType.reblog : .favorite
+            vc = StatusActionAccountListViewController(actionType: actionType, statusID: statusID, statusState: .unknown, accountIDs: [notification.account.id], mastodonController: mastodonController)
+        case .follow:
+            vc = ProfileViewController(accountID: notification.account.id, mastodonController: mastodonController)
+        case .followRequest:
+            // todo
+            return
+        case .unknown:
+            showLoadingError(Error.unknownType)
+            return
+        }
+        guard let navigationController else {
+            fatalError("Don't know how to show notification VC outside of navigation controller")
+        }
+        navigationController.viewControllers[navigationController.viewControllers.count - 1] = vc
+    }
+    
+    private func showLoadingError(_ error: any Swift.Error) {
+        let image = UIImageView(image: UIImage(systemName: "exclamationmark.triangle.fill")!)
+        image.tintColor = .secondaryLabel
+        image.contentMode = .scaleAspectFit
+        
+        let title = UILabel()
+        title.textColor = .secondaryLabel
+        title.font = .preferredFont(forTextStyle: .title1).withTraits(.traitBold)!
+        title.adjustsFontForContentSizeCategory = true
+        title.text = "Couldn't Load Notification"
+        
+        let subtitle = UILabel()
+        subtitle.textColor = .secondaryLabel
+        subtitle.font = .preferredFont(forTextStyle: .body)
+        subtitle.adjustsFontForContentSizeCategory = true
+        subtitle.numberOfLines = 0
+        subtitle.textAlignment = .center
+        if let error = error as? Error {
+            subtitle.text = error.localizedDescription
+        } else if let error = error as? Client.Error {
+            subtitle.text = error.localizedDescription
+        } else {
+            subtitle.text = error.localizedDescription
+        }
+        
+        let stack = UIStackView(arrangedSubviews: [
+            image,
+            title,
+            subtitle,
+        ])
+        stack.axis = .vertical
+        stack.alignment = .center
+        stack.spacing = 8
+        stack.isAccessibilityElement = true
+        stack.accessibilityLabel = "\(title.text!). \(subtitle.text!)"
+        
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stack)
+        NSLayoutConstraint.activate([
+            image.widthAnchor.constraint(equalToConstant: 64),
+            image.heightAnchor.constraint(equalToConstant: 64),
+            
+            stack.leadingAnchor.constraint(equalToSystemSpacingAfter: view.safeAreaLayoutGuide.leadingAnchor, multiplier: 1),
+            view.safeAreaLayoutGuide.trailingAnchor.constraint(equalToSystemSpacingAfter: stack.trailingAnchor, multiplier: 1),
+            stack.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),
+        ])
+    }
+
+}
+
+private enum Error: LocalizedError {
+    case missingStatus
+    case unknownType
+    
+    var errorDescription: String? {
+        switch self {
+        case .missingStatus:
+            "Missing status for mention/status notification"
+        case .unknownType:
+            "Unknown notification type"
+        }
+    }
+}

Tusker/Screens/Onboarding/OnboardingViewController.swift

@@ -158,7 +158,14 @@ class OnboardingViewController: UINavigationController {
             throw Error.gettingOwnAccount(error)
         }
         
-        let accountInfo = UserAccountsManager.shared.addAccount(instanceURL: instanceURL, clientID: clientID, clientSecret: clientSecret, username: ownAccount.username, accessToken: accessToken)
+        let accountInfo = UserAccountsManager.shared.addAccount(
+            instanceURL: instanceURL,
+            clientID: clientID,
+            clientSecret: clientSecret,
+            username: ownAccount.username,
+            accessToken: accessToken,
+            scopes: MastodonController.oauthScopes.map(\.rawValue)
+        )
         self.onboardingDelegate?.didFinishOnboarding(account: accountInfo)
     }
     
@@ -177,38 +184,19 @@ class OnboardingViewController: UINavigationController {
     
     @MainActor
     private func getAuthorizationCode(instanceURL: URL, clientID: String) async throws -> String {
-        var components = URLComponents(url: instanceURL, resolvingAgainstBaseURL: false)!
-        components.path = "/oauth/authorize"
-        components.queryItems = [
-            URLQueryItem(name: "client_id", value: clientID),
-            URLQueryItem(name: "response_type", value: "code"),
-            URLQueryItem(name: "scope", value: "read write follow"),
-            URLQueryItem(name: "redirect_uri", value: "tusker://oauth")
-        ]
-        let authorizeURL = components.url!
-        
-        return try await withCheckedThrowingContinuation({ continuation in
-            self.authenticationSession = ASWebAuthenticationSession(url: authorizeURL, callbackURLScheme: "tusker", completionHandler: { url, error in
-                if let error = error {
-                    if (error as? ASWebAuthenticationSessionError)?.code == .canceledLogin {
-                        continuation.resume(throwing: Error.cancelled)
-                    } else {
-                        continuation.resume(throwing: Error.authenticationSessionError(error))
-                    }
-                } else if let url = url,
-                          let components = URLComponents(url: url, resolvingAgainstBaseURL: true),
-                          let item = components.queryItems?.first(where: { $0.name == "code" }),
-                          let code = item.value {
-                    continuation.resume(returning: code)
-                } else {
-                    continuation.resume(throwing: Error.noAuthorizationCode)
-                }
-            })
-            // Prefer ephemeral sessions to make it easier to sign into multiple accounts on the same instance.
-            self.authenticationSession!.prefersEphemeralWebBrowserSession = true
-            self.authenticationSession!.presentationContextProvider = self
-            self.authenticationSession!.start()
-        })
+        do {
+            let service = GetAuthorizationTokenService(instanceURL: instanceURL, clientID: clientID, presentationContextProvider: self)
+            return try await service.run()
+        } catch let error as GetAuthorizationTokenService.Error {
+            switch error {
+            case .cancelled:
+                throw Error.cancelled
+            case .noAuthorizationCode:
+                throw Error.noAuthorizationCode
+            }
+        } catch {
+            throw Error.authenticationSessionError(error)
+        }
     }
 
 }

Tusker/Screens/Preferences/Notifications/NotificationsPrefsView.swift

@@ -0,0 +1,61 @@
+//
+//  NotificationsPrefsView.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/6/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import SwiftUI
+import UserNotifications
+import UserAccounts
+import PushNotifications
+import TuskerComponents
+
+struct NotificationsPrefsView: View {
+    @State private var error: NotificationsSetupError?
+    @ObservedObject private var userAccounts = UserAccountsManager.shared
+    
+    var body: some View {
+        List {
+            Section {
+                ForEach(userAccounts.accounts) { account in
+                    PushInstanceSettingsView(account: account)
+                }
+            }
+            .appGroupedListRowBackground()
+            
+            if #available(iOS 15.4, *) {
+                Section {
+                    Button {
+                        let str = if #available(iOS 16.0, *) {
+                            UIApplication.openNotificationSettingsURLString
+                        } else {
+                            UIApplicationOpenNotificationSettingsURLString
+                        }
+                        if let url = URL(string: str) {
+                            UIApplication.shared.open(url)
+                        }
+                    } label: {
+                        Text("Open Notification Settings…")
+                    }
+                }
+                .appGroupedListRowBackground()
+            }
+        }
+        .listStyle(.insetGrouped)
+        .appGroupedListBackground(container: PreferencesNavigationController.self)
+        .navigationTitle("Notifications")
+    }
+}
+
+private enum NotificationsSetupError: LocalizedError {
+    case requestingAuthorization(any Error)
+    
+    var errorDescription: String? {
+        switch self {
+        case .requestingAuthorization(let error):
+            "Notifications authorization request failed: \(error.localizedDescription)"
+        }
+    }
+}

Tusker/Screens/Preferences/Notifications/PushInstanceSettingsView.swift

@@ -0,0 +1,145 @@
+//
+//  PushInstanceSettingsView.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/7/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import SwiftUI
+import UserAccounts
+import Pachyderm
+import PushNotifications
+import TuskerComponents
+
+struct PushInstanceSettingsView: View {
+    let account: UserAccountInfo
+    @State private var mode: AsyncToggle.Mode
+    @State private var error: Error?
+    @State private var subscription: PushNotifications.PushSubscription?
+    @State private var showReLoginRequiredAlert = false
+    
+    @MainActor
+    init(account: UserAccountInfo) {
+        self.account = account
+        let subscription = PushManager.shared.pushSubscription(account: account)
+        self.subscription = subscription
+        self.mode = subscription == nil ? .off : .on
+    }
+    
+    var body: some View {
+        VStack(alignment: .prefsAvatar) {
+            HStack {
+                PrefsAccountView(account: account)
+                Spacer()
+                AsyncToggle("\(account.instanceURL.host!) notifications enabled", labelHidden: true, mode: $mode, onChange: updateNotificationsEnabled(enabled:))
+                    .labelsHidden()
+            }
+            PushSubscriptionView(account: account, subscription: subscription, updateSubscription: updateSubscription)
+        }
+        .alertWithData("An Error Occurred", data: $error) { data in
+            Button("OK") {}
+        } message: { data in
+            Text(data.localizedDescription)
+        }
+        .alert("Re-Login Required", isPresented: $showReLoginRequiredAlert) {
+            Button("Cancel", role: .cancel) {}
+            Button("Login") {
+                NotificationCenter.default.post(name: .reLogInRequired, object: account)
+            }
+        } message: {
+            Text("You must grant permission on \(account.instanceURL.host!) to turn on push notifications.")
+        }
+    }
+    
+    private func updateNotificationsEnabled(enabled: Bool) async -> Bool {
+        if enabled {
+            do {
+                return try await enableNotifications()
+            } catch {
+                PushManager.logger.error("Error creating instance subscription: \(String(describing: error))")
+                self.error = .enabling(error)
+                return false
+            }
+        } else {
+            do {
+                try await disableNotifications()
+            } catch {
+                PushManager.logger.error("Error removing instance subscription: \(String(describing: error))")
+                self.error = .disabling(error)
+                return false
+            }
+        }
+        return true
+    }
+    
+    private func enableNotifications() async throws -> Bool {
+        guard account.scopes?.contains(Scope.push.rawValue) == true else {
+            showReLoginRequiredAlert = true
+            return false
+        }
+        
+        let authorized = try await UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .providesAppNotificationSettings])
+        guard authorized else {
+            return false
+        }
+        
+        let subscription = try await PushManager.shared.createSubscription(account: account)
+        let mastodonController = await MastodonController.getForAccount(account)
+        do {
+            let result = try await mastodonController.createPushSubscription(subscription: subscription)
+            PushManager.logger.debug("Push subscription \(result.id) created on \(account.instanceURL)")
+            self.subscription = subscription
+            return true
+        } catch {
+            // if creation failed, remove the subscription locally as well
+            await PushManager.shared.removeSubscription(account: account)
+            throw error
+        }
+    }
+    
+    private func disableNotifications() async throws {
+        let mastodonController = await MastodonController.getForAccount(account)
+        try await mastodonController.deletePushSubscription()
+        await PushManager.shared.removeSubscription(account: account)
+        subscription = nil
+        PushManager.logger.debug("Push subscription removed on \(account.instanceURL)")
+    }
+    
+    private func updateSubscription(alerts: PushNotifications.PushSubscription.Alerts, policy: PushNotifications.PushSubscription.Policy) async -> Bool {
+        let mastodonController = await MastodonController.getForAccount(account)
+        do {
+            let result = try await mastodonController.updatePushSubscription(alerts: alerts, policy: policy)
+            PushManager.logger.debug("Push subscription \(result.id) updated on \(account.instanceURL)")
+            await PushManager.shared.updateSubscription(account: account, alerts: alerts, policy: policy)
+            subscription?.alerts = alerts
+            subscription?.policy = policy
+            return true
+        } catch {
+            PushManager.logger.error("Error updating subscription: \(String(describing: error))")
+            self.error = .updating(error)
+            return false
+        }
+    }
+}
+
+private enum Error: LocalizedError {
+    case enabling(any Swift.Error)
+    case disabling(any Swift.Error)
+    case updating(any Swift.Error)
+
+    var errorDescription: String? {
+        switch self {
+        case .enabling(let error):
+            "Enabling push: \(error.localizedDescription)"
+        case .disabling(let error):
+            "Disabling push: \(error.localizedDescription)"
+        case .updating(let error):
+            "Updating settings: \(error.localizedDescription)"
+        }
+    }
+}
+
+//#Preview {
+//    PushInstanceSettingsView()
+//}

Tusker/Screens/Preferences/Notifications/PushSubscriptionView.swift

@@ -0,0 +1,115 @@
+//
+//  PushSubscriptionView.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/7/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import SwiftUI
+import UserAccounts
+import PushNotifications
+import TuskerComponents
+
+struct PushSubscriptionView: View {
+    let account: UserAccountInfo
+    let subscription: PushSubscription?
+    let updateSubscription: (PushSubscription.Alerts, PushSubscription.Policy) async -> Bool
+
+    var body: some View {
+        if let subscription {
+            PushSubscriptionSettingsView(account: account, subscription: subscription, updateSubscription: updateSubscription)
+        } else {
+            Text("No notifications")
+                .font(.callout)
+                .foregroundStyle(.secondary)
+        }
+    }
+}
+
+private struct PushSubscriptionSettingsView: View {
+    let account: UserAccountInfo
+    let subscription: PushSubscription
+    let updateSubscription: (PushSubscription.Alerts, PushSubscription.Policy) async -> Bool
+    @State private var isLoading: [PushSubscription.Alerts: Bool] = [:]
+    
+    init(account: UserAccountInfo, subscription: PushSubscription, updateSubscription: @escaping (PushSubscription.Alerts, PushSubscription.Policy) async -> Bool) {
+        self.account = account
+        self.subscription = subscription
+        self.updateSubscription = updateSubscription
+    }
+    
+    var body: some View {
+        VStack {
+            alertsToggles
+            
+            AsyncPicker("From", alignment: .trailing, value: .constant(subscription.policy)) { newPolicy in
+                await updateSubscription(subscription.alerts, newPolicy)
+            } content: {
+                ForEach(PushSubscription.Policy.allCases) {
+                    Text($0.displayName).tag($0)
+                }
+            }
+            .pickerStyle(.menu)
+        }
+        // this is the default value of the alignment guide, but this modifier is loading bearing
+        .alignmentGuide(.prefsAvatar, computeValue: { dimension in
+            dimension[.leading]
+        })
+        // otherwise the flexible view makes the containing stack extend under the edge of the list row
+        .padding(.leading, 38)
+    }
+    
+    private var alertsToggles: some View {
+        GroupBox("Get notifications for") {
+            VStack {
+                toggle("All", alert: [.mention, .favorite, .reblog, .follow, .followRequest, .poll, .update])
+                toggle("Mentions", alert: .mention)
+                toggle("Favorites", alert: .favorite)
+                toggle("Reblogs", alert: .reblog)
+                toggle("Follows", alert: [.follow, .followRequest])
+                toggle("Polls finishing", alert: .poll)
+                toggle("Edits", alert: .update)
+                // status notifications not supported until we can enable/disable them in the app
+            }
+        }
+    }
+    
+    private func toggle(_ titleKey: LocalizedStringKey, alert: PushSubscription.Alerts) -> some View {
+        let binding: Binding<AsyncToggle.Mode> = Binding {
+            isLoading[alert] == true ? .loading : subscription.alerts.contains(alert) ? .on : .off
+        } set: { newValue in
+            isLoading[alert] = newValue == .loading
+        }
+        return AsyncToggle(titleKey, mode: binding) {
+            return await updateAlert(alert, isOn: $0)
+        }
+    }
+    
+    private func updateAlert(_ alert: PushSubscription.Alerts, isOn: Bool) async -> Bool {
+        var newAlerts = subscription.alerts
+        if isOn {
+            newAlerts.insert(alert)
+        } else {
+            newAlerts.remove(alert)
+        }
+        return await updateSubscription(newAlerts, subscription.policy)
+    }
+}
+
+private extension PushSubscription.Policy {
+    var displayName: String {
+        switch self {
+        case .all:
+            "Anyone"
+        case .followed:
+            "Accounts you follow"
+        case .followers:
+            "Your followers"
+        }
+    }
+}
+
+//#Preview {
+//    PushSubscriptionView()
+//}

Tusker/Screens/Preferences/PreferencesNavigationController.swift

@@ -10,17 +10,27 @@ import UIKit
 import SwiftUI
 import UserAccounts
 import SafariServices
+import AuthenticationServices
+import Pachyderm
+
+// TODO: replace this with NavigationStack and path once we target iOS 16
+class PreferencesNavigationState: ObservableObject {
+    @Published var showNotificationPreferences = false
+}
 
 class PreferencesNavigationController: UINavigationController {
     
     private let mastodonController: MastodonController
+    let navigationState: PreferencesNavigationState
     
     private var isSwitchingAccounts = false
 
     init(mastodonController: MastodonController) {
         self.mastodonController = mastodonController
+        let navigationState = PreferencesNavigationState()
+        self.navigationState = navigationState
         
-        let view = PreferencesView(mastodonController: mastodonController)
+        let view = PreferencesView(mastodonController: mastodonController, navigationState: navigationState)
         let hostingController = UIHostingController(rootView: view)
         super.init(rootViewController: hostingController)
         hostingController.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(donePressed))
@@ -37,6 +47,7 @@ class PreferencesNavigationController: UINavigationController {
         NotificationCenter.default.addObserver(self, selector: #selector(activateAccount(_:)), name: .activateAccount, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(userLoggedOut), name: .userLoggedOut, object: nil)
         NotificationCenter.default.addObserver(self, selector: #selector(showMastodonSettings), name: .showMastodonSettings, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(reLogInToAccount), name: .reLogInRequired, object: nil)
     }
 
     override func viewWillDisappear(_ animated: Bool) {
@@ -63,7 +74,7 @@ class PreferencesNavigationController: UINavigationController {
         dismiss(animated: true) // dismisses instance selector
     }
     
-    @objc func activateAccount(_ notification: Notification) {
+    @objc func activateAccount(_ notification: Foundation.Notification) {
         // TODO: this is a temporary measure
         // when switching accounts shortly after adding a new one, there is an old instance of PreferncesNavigationController still around
         // which tries to handle the notification but is unable to because it no longer is in a window (and therefore doesn't have a scene delegate)
@@ -105,6 +116,70 @@ class PreferencesNavigationController: UINavigationController {
         let vc = SFSafariViewController(url: components.url!)
         present(vc, animated: true)
     }
+    
+    @objc private func reLogInToAccount(_ notification: Foundation.Notification) {
+        guard let account = notification.object as? UserAccountInfo else {
+            return
+        }
+        
+        let dimmingView = UIView()
+        dimmingView.translatesAutoresizingMaskIntoConstraints = false
+        dimmingView.backgroundColor = .black.withAlphaComponent(0.1)
+        
+        let blur = UIBlurEffect(style: .prominent)
+        let blurView = UIVisualEffectView(effect: blur)
+        blurView.translatesAutoresizingMaskIntoConstraints = false
+        blurView.layer.cornerRadius = 15
+        blurView.layer.masksToBounds = true
+        
+        let spinner = UIActivityIndicatorView(style: .large)
+        spinner.translatesAutoresizingMaskIntoConstraints = false
+        spinner.startAnimating()
+
+        blurView.contentView.addSubview(spinner)
+        dimmingView.addSubview(blurView)
+        view.addSubview(dimmingView)
+        NSLayoutConstraint.activate([
+            dimmingView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            dimmingView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            dimmingView.topAnchor.constraint(equalTo: view.topAnchor),
+            dimmingView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+            
+            blurView.widthAnchor.constraint(equalToConstant: 100),
+            blurView.heightAnchor.constraint(equalToConstant: 100),
+            blurView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),
+            blurView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),
+            
+            spinner.centerXAnchor.constraint(equalTo: blurView.contentView.centerXAnchor),
+            spinner.centerYAnchor.constraint(equalTo: blurView.contentView.centerYAnchor),
+        ])
+        dimmingView.layer.opacity = 0
+        blurView.transform = CGAffineTransform(scaleX: 1.2, y: 1.2)
+        UIView.animate(withDuration: 0.2, delay: 0, options: .curveEaseInOut) {
+            dimmingView.layer.opacity = 1
+            blurView.transform = .identity
+        }
+        
+        Task {
+            do {
+                let mastodonController = MastodonController.getForAccount(account)
+                let (clientID, clientSecret) = try await mastodonController.registerApp(reregister: true)
+                
+                let service = GetAuthorizationTokenService(instanceURL: account.instanceURL, clientID: clientID, presentationContextProvider: self)
+                let code = try await service.run()
+                let token = try await mastodonController.authorize(authorizationCode: code)
+                UserAccountsManager.shared.updateCredentials(account, clientID: clientID, clientSecret: clientSecret, accessToken: token, scopes: MastodonController.oauthScopes.map(\.rawValue))
+                // try to revoke the old token
+                try? await Client(baseURL: account.instanceURL, accessToken: account.accessToken, clientID: account.clientID, clientSecret: account.clientSecret).revokeAccessToken()
+            } catch {
+                let alert = UIAlertController(title: "Error Updating Permissions", message: error.localizedDescription, preferredStyle: .alert)
+                alert.addAction(UIAlertAction(title: "OK", style: .default))
+                self.present(alert, animated: true)
+            }
+            
+            dimmingView.removeFromSuperview()
+        }
+    }
 
 }
 
@@ -124,3 +199,14 @@ extension PreferencesNavigationController: OnboardingViewControllerDelegate {
         }
     }
 }
+
+extension PreferencesNavigationController: ASWebAuthenticationPresentationContextProviding {
+    func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {
+        view.window!
+    }
+}
+
+extension Foundation.Notification.Name {
+    static let showMastodonSettings = Notification.Name("Tusker.showMastodonSettings")
+    static let reLogInRequired = Notification.Name("Tusker.reLogInRequired")
+}

Tusker/Screens/Preferences/PreferencesView.swift

@@ -7,21 +7,23 @@
 
 import SwiftUI
 import UserAccounts
-import WebURL
 
 struct PreferencesView: View {
     let mastodonController: MastodonController
+    @ObservedObject var navigationState: PreferencesNavigationState
     
     @ObservedObject private var userAccounts = UserAccountsManager.shared
     @State private var showingLogoutConfirmation = false
     
-    init(mastodonController: MastodonController) {
+    init(mastodonController: MastodonController, navigationState: PreferencesNavigationState) {
         self.mastodonController = mastodonController
+        self.navigationState = navigationState
     }
 
     var body: some View {
         List {
             accountsSection
+            notificationsSection
             preferencesSection
             aboutSection
         }
@@ -33,24 +35,12 @@ struct PreferencesView: View {
     
     private var accountsSection: some View {
         Section {
-            ForEach(userAccounts.accounts, id: \.accessToken) { (account) in
+            ForEach(userAccounts.accounts) { (account) in
                 Button(action: {
                     NotificationCenter.default.post(name: .activateAccount, object: nil, userInfo: ["account": account])
                 }) {
                     HStack {
-                        LocalAccountAvatarView(localAccountInfo: account)
-                        VStack(alignment: .leading) {
-                            Text(verbatim: account.username)
-                                .foregroundColor(.primary)
-                            let instance = if let domain = WebURL.Domain(account.instanceURL.host!) {
-                                domain.render(.uncheckedUnicodeString)
-                            } else {
-                                account.instanceURL.host!
-                            }
-                            Text(verbatim: instance)
-                                .font(.caption)
-                                .foregroundColor(.primary)
-                        }
+                        PrefsAccountView(account: account)
                         Spacer()
                         if account == mastodonController.accountInfo! {
                             Image(systemName: "checkmark")
@@ -102,6 +92,17 @@ struct PreferencesView: View {
         .appGroupedListRowBackground()
     }
     
+    private var notificationsSection: some View {
+        Section {
+            NavigationLink(isActive: $navigationState.showNotificationPreferences) {
+                NotificationsPrefsView()
+            } label: {
+                Text("Notifications")
+            }
+        }
+        .appGroupedListRowBackground()
+    }
+    
     private var preferencesSection: some View {
         Section {
             NavigationLink(destination: AppearancePrefsView()) {
@@ -146,10 +147,6 @@ struct PreferencesView: View {
     }
 }
 
-extension Notification.Name {
-    static let showMastodonSettings = Notification.Name("Tusker.showMastodonSettings")
-}
-
 //#if DEBUG
 //struct PreferencesView_Previews : PreviewProvider {
 //    static var previews: some View {

Tusker/Screens/Preferences/PrefsAccountView.swift

@@ -0,0 +1,50 @@
+//
+//  PrefsAccountView.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 4/7/24.
+//  Copyright © 2024 Shadowfacts. All rights reserved.
+//
+
+import SwiftUI
+import UserAccounts
+import WebURL
+
+struct PrefsAccountView: View {
+    let account: UserAccountInfo
+    
+    var body: some View {
+        HStack(spacing: 8) {
+            LocalAccountAvatarView(localAccountInfo: account)
+            VStack(alignment: .prefsAvatar) {
+                Text(verbatim: account.username)
+                    .foregroundColor(.primary)
+                let instance = if let domain = WebURL.Domain(account.instanceURL.host!) {
+                    domain.render(.uncheckedUnicodeString)
+                } else {
+                    account.instanceURL.host!
+                }
+                Text(verbatim: instance)
+                    .font(.caption)
+                    .foregroundColor(.primary)
+            }
+            .alignmentGuide(.prefsAvatar, computeValue: { dimension in
+                dimension[.leading]
+            })
+        }
+    }
+}
+
+private struct AvatarAlignment: AlignmentID {
+    static func defaultValue(in context: ViewDimensions) -> CGFloat {
+        context[.leading]
+    }
+}
+
+extension HorizontalAlignment {
+    static let prefsAvatar = HorizontalAlignment(AvatarAlignment.self)
+}
+
+//#Preview {
+//    PrefsAccountView()
+//}

Tusker/Shortcuts/UserActivityManager.swift

@@ -352,4 +352,21 @@ class UserActivityManager {
         context.push(ProfileViewController(accountID: accountID, mastodonController: mastodonController))
     }
     
+    // MARK: - Show Notification
+    static func showNotificationActivity(id notificationID: String, accountID: String) -> NSUserActivity {
+        let activity = NSUserActivity(type: .showNotification, accountID: accountID)
+        activity.addUserInfoEntries(from: [
+            "notificationID": notificationID,
+        ])
+        return activity
+    }
+    
+    func handleShowNotification(activity: NSUserActivity) {
+        guard let notificationID = activity.userInfo?["notificationID"] as? String else {
+            return
+        }
+        context.select(route: .notifications)
+        context.push(NotificationLoadingViewController(notificationID: notificationID, mastodonController: mastodonController))
+    }
+    
 }

Tusker/Shortcuts/UserActivityType.swift

@@ -18,6 +18,7 @@ enum UserActivityType: String {
     case showConversation = "space.vaccor.Tusker.activity.show-conversation"
     case myProfile = "space.vaccor.Tusker.activity.my-profile"
     case showProfile = "space.vaccor.Tusker.activity.show-profile"
+    case showNotification = "space.vaccor.Tusker.activity.show-notification"
 }
 
 extension UserActivityType {
@@ -42,6 +43,8 @@ extension UserActivityType {
             return UserActivityManager.handleMyProfile
         case .showProfile:
             return UserActivityManager.handleShowProfile
+        case .showNotification:
+            return UserActivityManager.handleShowNotification
         }
     }
 }

Tusker/Tusker.entitlements

@@ -18,6 +18,8 @@
 	</array>
 	<key>com.apple.developer.ubiquity-kvstore-identifier</key>
 	<string>$(TeamIdentifierPrefix)$(CFBundleIdentifier)</string>
+	<key>com.apple.developer.usernotifications.communication</key>
+	<true/>
 	<key>com.apple.security.app-sandbox</key>
 	<true/>
 	<key>com.apple.security.application-groups</key>

Tusker/en.lproj/Localizable.stringsdict

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>apns_enc</key>
+	<string>Encrypted Notification</string>
 	<key>poll votes count</key>
 	<dict>
 		<key>NSStringLocalizedFormatKey</key>