nip19: generate nip19 data in ellipsis & share menus

In the ellipsis menu, when the user selects the 'Copy user public key',
an nprofile Bech32 entity will be generated which will include TLV data
with the user's public key and entire relay list, if available.
The nprofile will be added to the user's copy clipboard.

When the user presses the share menu on an event and clicks the 'copy
link' button, a damus link with the nevent for the note will be
generated and copied to the user's clipboard.

Closes: https://github.com/damus-io/damus/issues/1844
Changelog-Changed: Generate nprofile/nevent links in share menus
Lightning-url: LNURL1DP68GURN8GHJ7EM9W3SKCCNE9E3K7MF0D3H82UNVWQHKWUN9V4HXGCTHDC6RZVGR8SW3G
Signed-off-by: kernelkind <kernelkind@gmail.com>
Reviewed-by: William Casarin <jb55@jb55.com>
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Models/ProfileModel.swift

@@ -20,6 +20,7 @@ class ProfileModel: ObservableObject, Equatable {
     var seen_event: Set<NoteId> = Set()
     var sub_id = UUID().description
     var prof_subid = UUID().description
+    var findRelay_subid = UUID().description
     
     init(pubkey: Pubkey, damus: DamusState) {
         self.pubkey = pubkey
@@ -139,6 +140,27 @@ class ProfileModel: ObservableObject, Equatable {
             }
         }
     }
+    
+    private func findRelaysHandler(relay_id: String, ev: NostrConnectionEvent) {
+        if case .nostr_event(let resp) = ev, case .event(_, let event) = resp, case .contacts = event.known_kind {
+            self.relays = decode_json_relays(event.content)
+        }
+    }
+    
+    func subscribeToFindRelays() {
+        var profile_filter = NostrFilter(kinds: [.contacts])
+        profile_filter.authors = [pubkey]
+        
+        damus.pool.subscribe(sub_id: findRelay_subid, filters: [profile_filter], handler: findRelaysHandler)
+    }
+    
+    func unsubscribeFindRelays() {
+        damus.pool.unsubscribe(sub_id: findRelay_subid)
+    }
+    
+    func getRelayStrings() -> [String] {
+        return relays?.keys.map {$0} ?? []
+    }
 }
 
 

damus/Views/ActionBar/EventActionBar.swift

@@ -13,6 +13,7 @@ struct EventActionBar: View {
     let damus_state: DamusState
     let event: NostrEvent
     let generator = UIImpactFeedbackGenerator(style: .medium)
+    let userProfile : ProfileModel
     
     // just used for previews
     @State var show_share_sheet: Bool = false
@@ -25,6 +26,7 @@ struct EventActionBar: View {
         self.damus_state = damus_state
         self.event = event
         _bar = ObservedObject(wrappedValue: bar ?? make_actionbar_model(ev: event.id, damus: damus_state))
+        self.userProfile = ProfileModel(pubkey: event.pubkey, damus: damus_state)
     }
     
     var lnurl: String? {
@@ -100,11 +102,11 @@ struct EventActionBar: View {
         }
         .sheet(isPresented: $show_share_action, onDismiss: { self.show_share_action = false }) {
             if #available(iOS 16.0, *) {
-                ShareAction(event: event, bookmarks: damus_state.bookmarks, show_share: $show_share_sheet)
+                ShareAction(event: event, bookmarks: damus_state.bookmarks, show_share: $show_share_sheet, userProfile: userProfile)
                     .presentationDetents([.height(300)])
                     .presentationDragIndicator(.visible)
             } else {
-                ShareAction(event: event, bookmarks: damus_state.bookmarks, show_share: $show_share_sheet)
+                ShareAction(event: event, bookmarks: damus_state.bookmarks, show_share: $show_share_sheet, userProfile: userProfile)
             }
         }
         .sheet(isPresented: $show_share_sheet, onDismiss: { self.show_share_sheet = false }) {

damus/Views/ActionBar/ShareAction.swift

@@ -10,18 +10,20 @@ import SwiftUI
 struct ShareAction: View {
     let event: NostrEvent
     let bookmarks: BookmarksManager
+    let userProfile: ProfileModel
     @State private var isBookmarked: Bool = false
 
     @Binding var show_share: Bool
     
     @Environment(\.dismiss) var dismiss
     
-    init(event: NostrEvent, bookmarks: BookmarksManager, show_share: Binding<Bool>) {
+    init(event: NostrEvent, bookmarks: BookmarksManager, show_share: Binding<Bool>, userProfile: ProfileModel) {
         let bookmarked = bookmarks.isBookmarked(event)
         self._isBookmarked = State(initialValue: bookmarked)
         
         self.bookmarks = bookmarks
         self.event = event
+        self.userProfile = userProfile
         self._show_share = show_share
     }
     
@@ -38,7 +40,7 @@ struct ShareAction: View {
                 
                 ShareActionButton(img: "link", text: NSLocalizedString("Copy Link", comment: "Button to copy link to note")) {
                     dismiss()
-                    UIPasteboard.general.string = "https://damus.io/" + event.id.bech32
+                    UIPasteboard.general.string = "https://damus.io/" + Bech32Object.encode(.nevent(NEvent(noteid: event.id, relays: userProfile.getRelayStrings())))
                 }
                 
                 let bookmarkImg = isBookmarked ? "bookmark.fill" : "bookmark"
@@ -69,6 +71,12 @@ struct ShareAction: View {
                 }
             }
         }
+        .onAppear() {
+            userProfile.subscribeToFindRelays()
+        }
+        .onDisappear() {
+            userProfile.unsubscribeFindRelays()
+        }
     }
 }
 

damus/Views/DMChatView.swift

@@ -22,7 +22,7 @@ struct DMChatView: View, KeyboardReadable {
                 LazyVStack(alignment: .leading) {
                     ForEach(Array(zip(dms.events, dms.events.indices)), id: \.0.id) { (ev, ind) in
                         DMView(event: dms.events[ind], damus_state: damus_state)
-                            .contextMenu{MenuItems(event: ev, keypair: damus_state.keypair, target_pubkey: ev.pubkey, bookmarks: damus_state.bookmarks, muted_threads: damus_state.muted_threads, settings: damus_state.settings)}
+                            .contextMenu{MenuItems(event: ev, keypair: damus_state.keypair, target_pubkey: ev.pubkey, bookmarks: damus_state.bookmarks, muted_threads: damus_state.muted_threads, settings: damus_state.settings, profileModel: ProfileModel(pubkey: ev.pubkey, damus: damus_state))}
                     }
                     EndBlock(height: 1)
                 }

damus/Views/Events/EventMenu.swift

@@ -13,6 +13,7 @@ struct EventMenuContext: View {
     let target_pubkey: Pubkey
     let bookmarks: BookmarksManager
     let muted_threads: MutedThreadsManager
+    let profileModel : ProfileModel
     @ObservedObject var settings: UserSettingsStore
     
     init(damus: DamusState, event: NostrEvent) {
@@ -22,6 +23,7 @@ struct EventMenuContext: View {
         self.bookmarks = damus.bookmarks
         self.muted_threads = damus.muted_threads
         self._settings = ObservedObject(wrappedValue: damus.settings)
+        self.profileModel = ProfileModel(pubkey: target_pubkey, damus: damus)
     }
     
     var body: some View {
@@ -32,7 +34,7 @@ struct EventMenuContext: View {
                 // Add our Menu button inside an overlay modifier to avoid affecting the rest of the layout around us.
                 .overlay(
                     Menu {
-                        MenuItems(event: event, keypair: keypair, target_pubkey: target_pubkey, bookmarks: bookmarks, muted_threads: muted_threads, settings: settings)
+                        MenuItems(event: event, keypair: keypair, target_pubkey: target_pubkey, bookmarks: bookmarks, muted_threads: muted_threads, settings: settings, profileModel: profileModel)
                     } label: {
                         Color.clear
                     }
@@ -52,13 +54,14 @@ struct MenuItems: View {
     let target_pubkey: Pubkey
     let bookmarks: BookmarksManager
     let muted_threads: MutedThreadsManager
+    let profileModel: ProfileModel
 
     @ObservedObject var settings: UserSettingsStore
 
     @State private var isBookmarked: Bool = false
     @State private var isMutedThread: Bool = false
     
-    init(event: NostrEvent, keypair: Keypair, target_pubkey: Pubkey, bookmarks: BookmarksManager, muted_threads: MutedThreadsManager, settings: UserSettingsStore) {
+    init(event: NostrEvent, keypair: Keypair, target_pubkey: Pubkey, bookmarks: BookmarksManager, muted_threads: MutedThreadsManager, settings: UserSettingsStore, profileModel: ProfileModel) {
         let bookmarked = bookmarks.isBookmarked(event)
         self._isBookmarked = State(initialValue: bookmarked)
 
@@ -71,6 +74,7 @@ struct MenuItems: View {
         self.keypair = keypair
         self.target_pubkey = target_pubkey
         self.settings = settings
+        self.profileModel = profileModel
     }
     
     var body: some View {
@@ -82,7 +86,7 @@ struct MenuItems: View {
             }
 
             Button {
-                UIPasteboard.general.string = target_pubkey.npub
+                UIPasteboard.general.string = Bech32Object.encode(.nprofile(NProfile(author: target_pubkey, relays: profileModel.getRelayStrings())))
             } label: {
                 Label(NSLocalizedString("Copy user public key", comment: "Context menu option for copying the ID of the user who created the note."), image: "user")
             }
@@ -144,6 +148,12 @@ struct MenuItems: View {
                 }
             }
         }
+        .onAppear() {
+            profileModel.subscribeToFindRelays()
+        }
+        .onDisappear() {
+            profileModel.unsubscribeFindRelays()
+        }
     }
 }