Scaffolding for push subscription alert types

Packages/PushNotifications/Sources/PushNotifications/PushSubscription.swift

@@ -57,7 +57,7 @@ public struct PushSubscription {
         case all, followed, followers
     }
     
-    public struct Alerts: OptionSet {
+    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)

Tusker/Screens/Preferences/Notifications/NotificationsPrefsView.swift

@@ -32,13 +32,7 @@ struct NotificationsPrefsView: View {
     
     private var enableSection: some View {
         Section {
-            HStack {
-                Text("Push Notifications")
-                
-                Spacer()
-                
-                TriStateToggle(titleKey: "Push Notifications Enabled", mode: $isSetup, onChange: isSetupChanged(newValue:))
-            }
+            TriStateToggle("Push Notifications", mode: $isSetup, onChange: isSetupChanged(newValue:))
         }
         .appGroupedListRowBackground()
         .alertWithData("An Error Occurred", data: $error) { error in

Tusker/Screens/Preferences/Notifications/PushInstanceSettingsView.swift

@@ -32,9 +32,10 @@ struct PushInstanceSettingsView: View {
             HStack {
                 PrefsAccountView(account: account)
                 Spacer()
-                TriStateToggle(titleKey: "\(account.instanceURL.host!) notifications enabled", mode: $mode, onChange: updateNotificationsEnabled(enabled:))
+                TriStateToggle("\(account.instanceURL.host!) notifications enabled", labelHidden: true, mode: $mode, onChange: updateNotificationsEnabled(enabled:))
+                    .labelsHidden()
             }
-            PushSubscriptionView(account: account, subscription: subscription)
+            PushSubscriptionView(account: account, subscription: subscription, updateSubscription: updateSubscription)
         }
         .alertWithData("An Error Occurred", data: $error) { data in
             Button("OK") {}
@@ -90,11 +91,27 @@ struct PushInstanceSettingsView: View {
         subscription = nil
         PushManager.logger.debug("Push subscription removed on \(account.instanceURL)")
     }
+    
+    private func updateSubscription(alerts: PushNotifications.PushSubscription.Alerts, policy: PushNotifications.PushSubscription.Policy) async {
+        try! await Task.sleep(nanoseconds: NSEC_PER_SEC)
+        let req = Pachyderm.PushSubscription.update(alerts: .init(alerts), policy: .init(policy))
+        let mastodonController = await MastodonController.getForAccount(account)
+        do {
+            let (result, _) = try await mastodonController.run(req)
+            PushManager.logger.debug("Push subscription \(result.id) updated on \(account.instanceURL)")
+            subscription?.alerts = alerts
+            subscription?.policy = policy
+        } catch {
+            PushManager.logger.error("Error updating subscription: \(String(describing: error))")
+            self.error = .updating(error)
+        }
+    }
 }
 
 private enum Error: LocalizedError {
     case enabling(any Swift.Error)
     case disabling(any Swift.Error)
+    case updating(any Swift.Error)
 
     var errorDescription: String? {
         switch self {
@@ -102,6 +119,8 @@ private enum Error: LocalizedError {
             "Enabling push: \(error.localizedDescription)"
         case .disabling(let error):
             "Disabling push: \(error.localizedDescription)"
+        case .updating(let error):
+            "Updating settings: \(error.localizedDescription)"
         }
     }
 }

Tusker/Screens/Preferences/Notifications/PushSubscriptionView.swift

@@ -13,10 +13,11 @@ import PushNotifications
 struct PushSubscriptionView: View {
     let account: UserAccountInfo
     let subscription: PushSubscription?
+    let updateSubscription: (PushSubscription.Alerts, PushSubscription.Policy) async -> Void
 
     var body: some View {
         if let subscription {
-            Text("wee")
+            PushSubscriptionSettingsView(account: account, subscription: subscription, updateSubscription: updateSubscription)
         } else {
             Text("No notifications")
                 .foregroundStyle(.secondary)
@@ -24,6 +25,51 @@ struct PushSubscriptionView: View {
     }
 }
 
+private struct PushSubscriptionSettingsView: View {
+    let account: UserAccountInfo
+    let subscription: PushSubscription
+    let updateSubscription: (PushSubscription.Alerts, PushSubscription.Policy) async -> Void
+    @State private var isLoading: [PushSubscription.Alerts: Bool] = [:]
+    
+    init(account: UserAccountInfo, subscription: PushSubscription, updateSubscription: @escaping (PushSubscription.Alerts, PushSubscription.Policy) async -> Void) {
+        self.account = account
+        self.subscription = subscription
+        self.updateSubscription = updateSubscription
+    }
+    
+    var body: some View {
+        VStack(alignment: .prefsAvatar) {
+            TriStateToggle("Mentions", mode: alertsBinding(for: .mention)) {
+                await onChange(alert: .mention, value: $0)
+            }
+        }
+        // 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 func alertsBinding(for alert: PushSubscription.Alerts) -> Binding<TriStateToggle.Mode> {
+        return Binding {
+            isLoading[alert] == true ? .loading : subscription.alerts.contains(alert) ? .on : .off
+        } set: { newValue in
+            isLoading[alert] = newValue == .loading
+        }
+    }
+    
+    private func onChange(alert: PushSubscription.Alerts, value: Bool) async {
+        var newAlerts = subscription.alerts
+        if value {
+            newAlerts.insert(alert)
+        } else {
+            newAlerts.remove(alert)
+        }
+        await updateSubscription(newAlerts, subscription.policy)
+    }
+}
+
 //#Preview {
 //    PushSubscriptionView()
 //}

Tusker/Screens/Preferences/Notifications/TriStateToggle.swift

@@ -10,40 +10,45 @@ import SwiftUI
 
 struct TriStateToggle: View {
     let titleKey: LocalizedStringKey
+    @available(iOS, obsoleted: 16.0, message: "Switch to LabeledContent")
+    let labelHidden: Bool
     @Binding var mode: Mode
     let onChange: (Bool) async -> Void
-    @State private var isOn: Bool
     
-    init(titleKey: LocalizedStringKey, mode: Binding<Mode>, onChange: @escaping (Bool) async -> Void) {
+    init(_ titleKey: LocalizedStringKey, labelHidden: Bool = false, mode: Binding<Mode>, onChange: @escaping (Bool) async -> Void) {
         self.titleKey = titleKey
+        self.labelHidden = labelHidden
         self._mode = mode
         self.onChange = onChange
-        self.isOn = mode.wrappedValue == .on
     }
     
     var body: some View {
+        content
+    }
+    
+    @ViewBuilder
+    private var content: some View {
+        if #available(iOS 16.0, *) {
+            LabeledContent(titleKey) {
+                toggleOrSpinner
+            }
+        } else if labelHidden {
+            toggleOrSpinner
+        } else {
+            HStack {
+                Text(titleKey)
+                Spacer()
                 toggleOrSpinner
-            .onChange(of: mode) { newValue in
-                switch newValue {
-                case .off:
-                    isOn = false
-                case .loading:
-                    break
-                case .on:
-                    isOn = true
             }
         }
     }
     
     @ViewBuilder
     private var toggleOrSpinner: some View {
-        if mode == .loading {
-            ProgressView()
-        } else {
+        ZStack {
             Toggle(titleKey, isOn: Binding {
-                isOn
+                mode == .on
             } set: { newValue in
-                isOn = newValue
                 mode = .loading
                 Task {
                     await onChange(newValue)
@@ -51,6 +56,11 @@ struct TriStateToggle: View {
                 }
             })
             .labelsHidden()
+            .opacity(mode == .loading ? 0 : 1)
+            
+            if mode == .loading {
+                ProgressView()
+            }
         }
     }
     
@@ -61,10 +71,9 @@ struct TriStateToggle: View {
     }
 }
 
-
 #Preview {
     @State var mode = TriStateToggle.Mode.on
-    return TriStateToggle(titleKey: "", mode: $mode) { _ in
+    return TriStateToggle("", mode: $mode) { _ in
         try! await Task.sleep(nanoseconds: NSEC_PER_SEC)
     }
 }

Tusker/Screens/Preferences/PrefsAccountView.swift

@@ -14,7 +14,7 @@ struct PrefsAccountView: View {
     let account: UserAccountInfo
     
     var body: some View {
-        HStack {
+        HStack(spacing: 8) {
             LocalAccountAvatarView(localAccountInfo: account)
             VStack(alignment: .prefsAvatar) {
                 Text(verbatim: account.username)
@@ -37,7 +37,7 @@ struct PrefsAccountView: View {
 
 private struct AvatarAlignment: AlignmentID {
     static func defaultValue(in context: ViewDimensions) -> CGFloat {
-        0
+        context[.leading]
     }
 }