better reply descriptions

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

damus/Nostr/NostrEvent.swift

@@ -130,7 +130,26 @@ class NostrEvent: Codable, Identifiable {
     public var referenced_ids: [ReferencedId] {
         return get_referenced_ids(key: "e")
     }
-
+    
+    public var reply_description: ([String], Int) {
+        var c = 0
+        var ns: [String] = []
+        var i = tags.count - 1
+        
+        while i >= 0 {
+            let tag = tags[i]
+            if tag.count >= 2 && tag[0] == "p" {
+                c += 1
+                if ns.count < 3 {
+                    ns.append(tag[1])
+                }
+            }
+            i -= 1
+        }
+        
+        return (ns, c)
+    }
+    
     public var referenced_pubkeys: [ReferencedId] {
         return get_referenced_ids(key: "p")
     }

damus/Views/EventDetailView.swift

@@ -293,7 +293,6 @@ func calculated_collapsed_events(collapsed: Bool, active: NostrEvent, events: [N
 
     let nevents = events.count
     var start: Int = 0
-    var end: Int = 0
     var i: Int = 0
     
     return events.reduce(into: []) { (acc, ev) in
@@ -306,6 +305,9 @@ func calculated_collapsed_events(collapsed: Bool, active: NostrEvent, events: [N
 
         switch highlight {
         case .none:
+            if (count == 0) {
+                start = 1
+            }
             count += 1
         case .main:
             if count != 0 {

damus/Views/EventView.swift

@@ -50,16 +50,18 @@ struct EventView: View {
                     ProfileName(pubkey: event.pubkey, profile: profile)
                     Text("\(format_relative_time(event.created_at))")
                         .foregroundColor(.gray)
-                    if event.is_reply {
-                        Label("", systemImage: "arrowshape.turn.up.left")
-                            .font(.footnote)
-                            .foregroundColor(.gray)
-                    }
                     Spacer()
                     if (event.pow ?? 0) >= 10 {
                         PowView(event.pow)
                     }
                 }
+                
+                if event.is_reply {
+                    Text("\(reply_desc(profiles: profiles, event: event))")
+                        .font(.footnote)
+                        .foregroundColor(.gray)
+                        .frame(maxWidth: .infinity, alignment: .leading)
+                }
 
                 Text(event.content)
                     .frame(maxWidth: .infinity, alignment: .leading)
@@ -88,3 +90,25 @@ func format_relative_time(_ created_at: Int64) -> String
 {
     return time_ago_since(Date(timeIntervalSince1970: Double(created_at)))
 }
+
+func reply_desc(profiles: Profiles, event: NostrEvent) -> String {
+    let (pubkeys, n) = event.reply_description
+    if pubkeys.count == 0 {
+        return "Reply"
+    }
+    
+    let names: [String] = pubkeys.map {
+        let prof = profiles.lookup(id: $0)
+        return Profile.displayName(profile: prof, pubkey: $0)
+    }
+    
+    if names.count == 2 {
+        return "Replying to \(names[0]) & \(names[1])"
+    }
+    
+    let other = n - pubkeys.count
+    let plural = other == 1 ? "" : "s"
+    let and_other = n > 1 ? " & \(other) other\(plural)" : ""
+    
+    return "Replying to \(names[0])\(and_other)"
+}

damus/Views/ProfilePicView.swift

@@ -40,14 +40,14 @@ struct ProfilePicView: View {
             AsyncImage(url: pic) { img in
                 img.resizable()
             } placeholder: {
-                Color.purple.opacity(0.1)
+                Color.purple.opacity(0.2)
             }
             .frame(width: PFP_SIZE, height: PFP_SIZE)
             .clipShape(Circle())
             .overlay(Circle().stroke(highlight_color(highlight), lineWidth: pfp_line_width(highlight)))
             .padding(2)
         } else {
-            Color.purple.opacity(0.1)
+            Color.purple.opacity(0.2)
                 .frame(width: PFP_SIZE, height: PFP_SIZE)
                 .cornerRadius(CORNER_RADIUS)
                 .overlay(Circle().stroke(highlight_color(highlight), lineWidth: pfp_line_width(highlight)))