Display client identifiers in notes

CHANGELOG.md

@@ -12,9 +12,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Release Notes
 - Fixed: crash in Event.trackDelete(on:context:).
+- Added: Display which client app was used to post notes with "via [client name]" in the UI
+- Added: Interactive client name that navigates to client publisher's profile when clicked
 
 ### Internal Changes
 - Fixed: Contact Support event fires too often.
+- Added: Implement NIP-89 application metadata support for fetching client details
+- Added: Support extracting client info from event tags with client metadata
 - Performance improvements for RepliesLabel, AuthorLabel, NoteCardHeader, Date+Elapsed
 
 ## [1.2.1] - 2025-02-19Z

Nos.xcodeproj/project.pbxproj

@@ -3031,12 +3031,11 @@
 				ASSETCATALOG_COMPILER_GENERATE_ASSET_SYMBOLS = NO;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = accent;
 				CODE_SIGN_ENTITLEMENTS = Nos/NosStaging.entitlements;
-				CODE_SIGN_IDENTITY = "Apple Distribution: Verse Communications, Inc. (GZCZBKH7MY)";
-				CODE_SIGN_STYLE = Manual;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 224;
 				DEAD_CODE_STRIPPING = YES;
-				DEVELOPMENT_TEAM = "";
-				"DEVELOPMENT_TEAM[sdk=iphoneos*]" = GZCZBKH7MY;
+				DEVELOPMENT_TEAM = GZCZBKH7MY;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
@@ -3069,7 +3068,6 @@
 				PRODUCT_MODULE_NAME = Nos;
 				PRODUCT_NAME = "$(TARGET_NAME) Staging";
 				PROVISIONING_PROFILE_SPECIFIER = "";
-				"PROVISIONING_PROFILE_SPECIFIER[sdk=iphoneos*]" = "match AppStore com.verse.Nos-staging";
 				SCHEME_PREFIX = "nos-staging";
 				SDKROOT = auto;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
@@ -3486,11 +3484,11 @@
 				ASSETCATALOG_COMPILER_GENERATE_ASSET_SYMBOLS = NO;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = accent;
 				CODE_SIGN_ENTITLEMENTS = Nos/Nos.entitlements;
-				CODE_SIGN_STYLE = Manual;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 224;
 				DEAD_CODE_STRIPPING = YES;
-				DEVELOPMENT_TEAM = "";
-				"DEVELOPMENT_TEAM[sdk=iphoneos*]" = GZCZBKH7MY;
+				DEVELOPMENT_TEAM = GZCZBKH7MY;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
@@ -3522,7 +3520,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.verse.Nos;
 				PRODUCT_MODULE_NAME = Nos;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				"PROVISIONING_PROFILE_SPECIFIER[sdk=iphoneos*]" = "match Development com.verse.Nos";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SCHEME_PREFIX = nos;
 				SDKROOT = auto;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
@@ -3543,12 +3541,11 @@
 				ASSETCATALOG_COMPILER_GENERATE_ASSET_SYMBOLS = NO;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = accent;
 				CODE_SIGN_ENTITLEMENTS = Nos/Nos.entitlements;
-				CODE_SIGN_IDENTITY = "Apple Distribution: Verse Communications, Inc. (GZCZBKH7MY)";
-				CODE_SIGN_STYLE = Manual;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 224;
 				DEAD_CODE_STRIPPING = YES;
-				DEVELOPMENT_TEAM = "";
-				"DEVELOPMENT_TEAM[sdk=iphoneos*]" = GZCZBKH7MY;
+				DEVELOPMENT_TEAM = GZCZBKH7MY;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
@@ -3580,7 +3577,6 @@
 				PRODUCT_MODULE_NAME = Nos;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
-				"PROVISIONING_PROFILE_SPECIFIER[sdk=iphoneos*]" = "match AppStore com.verse.Nos";
 				SCHEME_PREFIX = nos;
 				SDKROOT = auto;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";

Nos/Models/CoreData/Event+CoreDataClass.swift

@@ -640,4 +640,86 @@ class Event: NosManagedObject, VerifiableEvent {
         shouldBePublishedTo = Set()
     }
 }
+extension Event {
+    var clientName: String? {
+        guard let tags = allTags as? [[String]] else {
+            return nil
+        }
+
+        for tag in tags where tag.count >= 2 && tag[0] == "client" {
+            return tag[1] // Return the client identifier (e.g., "nos.social")
+        }
+        return nil
+    }
+
+    struct ClientInfo {
+        let name: String // e.g. "nos.social"
+        let identifier: String? // e.g. "31990:0f22c06eac1002684efcc68f568540e8342d1609d508bcd4312c038e6194f8b6:nos-ios"
+        let relayHint: String?
+        var metadataLoaded = false
+        var metadataEvent: Event?
+
+        var displayName: String {
+            name
+        }
+
+        // Parse the identifier to extract key components
+        var parsedIdentifier: (kind: Int?, pubkey: String?)? {
+            guard let identifier = identifier else { return nil }
+
+            let components = identifier.split(separator: ":").map(String.init)
+            guard components.count >= 3 else { return nil }
+
+            return (
+                kind: Int(components[0]),
+                pubkey: components[1]
+            )
+        }
+    }
+
+    var clientInfo: ClientInfo? {
+        guard let tags = allTags as? [[String]] else {
+            return nil
+        }
+
+        for tag in tags where tag.count >= 2 && tag[0] == "client" {
+            return ClientInfo(
+                name: tag[1],
+                identifier: tag.count >= 3 ? tag[2] : nil,
+                relayHint: tag.count >= 4 ? tag[3] : nil,
+                metadataLoaded: false,
+                metadataEvent: nil
+            )
+        }
+        return nil
+    }
+
+    // Load client metadata if available
+    @MainActor func loadClientMetadata() async {
+        guard let clientInfo = clientInfo, 
+            let parsed = clientInfo.parsedIdentifier,
+            let pubkey = parsed.pubkey,
+            let identifier = clientInfo.identifier,
+            let components = identifier.split(separator: ":").map(String.init).last else {
+            return
+        }
+
+        @Dependency(\.relayService) var relayService
+        @Dependency(\.persistenceController) var persistenceController
+
+        let filter = Filter(
+            authorKeys: [pubkey],
+            kinds: [.appMetadata],
+            dTags: [components],
+            limit: 1
+        )
+
+        let cancellable = await relayService.fetchEvents(matching: filter)
+
+        // Give it a moment to fetch
+        try? await Task.sleep(nanoseconds: 2_000_000_000) // 2 seconds
+        cancellable.cancel()
+    }
+}
+
 // swiftlint:enable file_length

Nos/Models/EventKind.swift

@@ -70,6 +70,9 @@ public enum EventKind: Int64, CaseIterable, Hashable {
 
     /// Long-form Content
     case longFormContent = 30023
+
+    /// Application Metadata (NIP-89)
+    case appMetadata = 31990
 
     // swiftlint:enable number_separator
 }

Nos/Views/Note/NoteCard.swift

@@ -83,7 +83,9 @@ struct NoteCard: View {
                                         authorSafeName: author.safeName,
                                         authorProfilePhotoURL: author.profilePhotoURL,
                                         noteExpirationDate: note.expirationDate,
-                                        noteCreatedDate: note.createdAt
+                                        noteCreatedDate: note.createdAt,
+                                        clientName: note.clientName,
+                                        note: note
                                     )
                                 }
                             }

Nos/Views/Note/NoteCardHeader.swift

@@ -7,18 +7,24 @@ struct NoteCardHeader: View {
     let authorProfilePhotoURL: URL?
     let noteExpirationDate: Date?
     let noteCreatedDate: Date?
+    let clientName: String?
+    let note: Event?
 
     @State private var currentTime = Date.now
     @State private var expirationDateDistanceString: String?
     @State private var createdDateDistanceString: String?
+    @State private var isLoadingClientInfo = false
 
     /// A timer used to cause a periodic refresh of the date strings.
     @State private var timer: Timer.TimerPublisher?
     @State private var timerCancellable: AnyCancellable?
 
+    @EnvironmentObject private var router: Router
+
     var body: some View {
         HStack(alignment: .center, spacing: 8) {
             AuthorLabel(name: authorSafeName, profilePhotoURL: authorProfilePhotoURL)
+
             if let expirationDateDistanceString {
                 Image.disappearingMessages
                     .resizable()
@@ -29,10 +35,44 @@ struct NoteCardHeader: View {
                     .font(.clarity(.medium))
                     .foregroundColor(.secondaryTxt)
             } else if let createdDateDistanceString {
-                Text(createdDateDistanceString)
-                    .lineLimit(1)
-                    .font(.clarity(.medium))
-                    .foregroundColor(.secondaryTxt)
+                HStack(spacing: 4) {
+                    Text(createdDateDistanceString)
+                        .lineLimit(1)
+                        .font(.clarity(.medium))
+                        .foregroundColor(.secondaryTxt)
+
+                    // Display client name if available
+                    if let clientName = clientName {
+                        Button {
+                            Task {
+                                isLoadingClientInfo = true
+                                await note?.loadClientMetadata()
+                                isLoadingClientInfo = false
+
+                                // If we find a client app in author's profile, go to their profile
+                                if let clientInfo = note?.clientInfo,
+                                    let parsed = clientInfo.parsedIdentifier,
+                                    let pubkey = parsed.pubkey {
+                                    Task { @MainActor in
+                                        router.push(.author(pubkey))
+                                    }
+                                }
+                            }
+                        } label: {
+                            HStack(spacing: 2) {
+                                Text("• via \(clientName)")
+                                    .lineLimit(1)
+                                    .font(.clarity(.medium, size: 12, textStyle: .caption))
+                                    .foregroundColor(.secondaryTxt)
+
+                                if isLoadingClientInfo {
+                                    ProgressView()
+                                        .scaleEffect(0.5)
+                                }
+                            }
+                        }
+                    }
+                }
             }
 
             Spacer()
@@ -79,16 +119,22 @@ struct NoteCardHeader_Previews: PreviewProvider {
             authorSafeName: previewData.previewAuthor.safeName,
             authorProfilePhotoURL: previewData.previewAuthor.profilePhotoURL,
             noteExpirationDate: previewData.imageNote.expirationDate,
-            noteCreatedDate: previewData.imageNote.createdAt
+            noteCreatedDate: previewData.imageNote.createdAt,
+            clientName: "nos.social",
+            note: previewData.imageNote
         )
         .inject(previewData: previewData)
+        .environmentObject(previewData.router)
 
         NoteCardHeader(
             authorSafeName: previewData.previewAuthor.safeName,
             authorProfilePhotoURL: previewData.previewAuthor.profilePhotoURL,
             noteExpirationDate: previewData.expiringNote.expirationDate,
-            noteCreatedDate: previewData.expiringNote.createdAt
+            noteCreatedDate: previewData.expiringNote.createdAt,
+            clientName: nil,
+            note: nil
         )
         .inject(previewData: previewData)
+        .environmentObject(previewData.router)
     }
 }