contact: update contact event on follow/unfollow

Signed-off-by: William Casarin <jb55@jb55.com>

damus/ContentView.swift

@@ -248,12 +248,14 @@ struct ContentView: View {
             let target = notif.object as! FollowTarget
             let pk = target.pubkey
             
-            if unfollow_user(pool: damus.pool,
+            if let ev = unfollow_user(pool: damus.pool,
                              our_contacts: damus.contacts.event,
                              pubkey: damus.pubkey,
                              privkey: privkey,
                              unfollow: pk) {
                 notify(.unfollowed, pk)
+                
+                damus.contacts.event = ev
                 damus.contacts.remove_friend(pk)
                 //friend_events = friend_events.filter { $0.pubkey != pk }
             }
@@ -268,13 +270,15 @@ struct ContentView: View {
                 return
             }
             
-            if follow_user(pool: damus.pool,
+            if let ev = follow_user(pool: damus.pool,
                            our_contacts: damus.contacts.event,
                            pubkey: damus.pubkey,
                            privkey: privkey,
                            follow: ReferencedId(ref_id: fnotify.pubkey, relay_id: nil, key: "p")) {
                 notify(.followed, fnotify.pubkey)
                 
+                damus_state?.contacts.event = ev
+                
                 switch fnotify {
                 case .pubkey(let pk):
                     damus.contacts.add_friend_pubkey(pk)

damus/Models/Contacts.swift

@@ -79,22 +79,23 @@ func create_contacts_content(_ relays: [RelayDescriptor]) -> String? {
 }
 
 
-func follow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, privkey: String, follow: ReferencedId) -> Bool {
+func follow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, privkey: String, follow: ReferencedId) -> NostrEvent? {
     guard let ev = follow_user_event(our_contacts: our_contacts, our_pubkey: pubkey, follow: follow) else {
-        return false
+        return nil
     }
     
     ev.calculate_id()
     ev.sign(privkey: privkey)
     
+    
     pool.send(.event(ev))
     
-    return true
+    return ev
 }
 
-func unfollow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, privkey: String, unfollow: String) -> Bool {
+func unfollow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, privkey: String, unfollow: String) -> NostrEvent? {
     guard let cs = our_contacts else {
-        return false
+        return nil
     }
     
     let ev = unfollow_user_event(our_contacts: cs, our_pubkey: pubkey, unfollow: unfollow)
@@ -103,7 +104,7 @@ func unfollow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, p
     
     pool.send(.event(ev))
     
-    return true
+    return ev
 }
 
 func unfollow_user_event(our_contacts: NostrEvent, our_pubkey: String, unfollow: String) -> NostrEvent {