Add support for rendering highlights with comments

This commit implements rendering comments from the `["comment",
<COMMENT_TEXT>]` tag in a highlight note.

Comment contents get rendered like a kind 1 note's "content" field

This commit also adds the `r` "reference" tag as a standard tag reference type

Changelog-Added: Add support for rendering highlights with comments
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

damus/ContentParsing.swift

@@ -12,7 +12,7 @@ enum NoteContent {
     case content(String, TagsSequence?)
 
     init(note: NostrEvent, keypair: Keypair) {
-        if note.known_kind == .dm {
+        if note.known_kind == .dm || note.known_kind == .highlight {
             self = .content(note.get_content(keypair), note.tags)
         } else {
             self = .note(note)

damus/ContentView.swift

@@ -1112,7 +1112,7 @@ func on_open_url(state: DamusState, url: URL, result: @escaping (OpenResult?) ->
             }
         case .hashtag(let ht):
             result(.filter(.filter_hashtag([ht.hashtag])))
-        case .param, .quote:
+        case .param, .quote, .reference:
             // doesn't really make sense here
             break
         case .naddr(let naddr):

damus/Models/CommentItem.swift

@@ -0,0 +1,23 @@
+//
+//  CommentItem.swift
+//  damus
+//
+//  Created by Daniel D’Aquino on 2024-08-14.
+//
+
+import Foundation
+
+struct CommentItem: TagConvertible {
+    static let TAG_KEY: String = "comment"
+    let content: String
+    var tag: [String] {
+        return [Self.TAG_KEY, content]
+    }
+    
+    static func from_tag(tag: TagSequence) -> CommentItem? {
+        guard tag.count == 2 else { return nil }
+        guard tag[0].string() == Self.TAG_KEY else { return nil }
+        
+        return CommentItem(content: tag[1].string())
+    }
+}

damus/Models/Contacts+.swift

@@ -109,7 +109,7 @@ func is_already_following(contacts: NostrEvent, follow: FollowRef) -> Bool {
         case let (.pubkey(pk), .pubkey(follow_pk)):
             return pk == follow_pk
         case (.hashtag, .pubkey), (.pubkey, .hashtag),
-            (.event, _), (.quote, _), (.param, _), (.naddr, _):
+            (.event, _), (.quote, _), (.param, _), (.naddr, _), (.reference(_), _):
             return false
         }
     }

damus/Nostr/ReferencedId.swift

@@ -122,20 +122,22 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
     case hashtag(Hashtag)
     case param(TagElem)
     case naddr(NAddr)
+    case reference(String)
     
     var key: RefKey {
         switch self {
-        case .event:   return .e
-        case .pubkey:  return .p
-        case .quote:   return .q
-        case .hashtag: return .t
-        case .param:   return .d
-        case .naddr:   return .a
+        case .event:        return .e
+        case .pubkey:       return .p
+        case .quote:        return .q
+        case .hashtag:      return .t
+        case .param:        return .d
+        case .naddr:        return .a
+        case .reference:    return .r
         }
     }
 
     enum RefKey: AsciiCharacter, TagKey, CustomStringConvertible {
-        case e, p, t, d, q, a
+        case e, p, t, d, q, a, r
 
         var keychar: AsciiCharacter {
             self.rawValue
@@ -159,6 +161,8 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
         case .param(let string): return string.string()
         case .naddr(let naddr):
             return naddr.kind.description + ":" + naddr.author.hex() + ":" + naddr.identifier
+        case .reference(let string):
+            return string
         }
     }
 
@@ -179,6 +183,7 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
         case .t: return .hashtag(Hashtag(hashtag: t1.string()))
         case .d: return .param(t1)
         case .a: return .naddr(NAddr(identifier: "", author: Pubkey(Data()), relays: [], kind: 0))
+        case .r: return .reference(t1.string())
         }
     }
 }

damus/Views/Events/Highlight/HighlightView.swift

@@ -59,9 +59,9 @@ struct HighlightBodyView: View {
     var body: some View {
         Group {
             if options.contains(.wide) {
-                Main.padding(.horizontal)
-            } else {
                 Main
+            } else {
+                Main.padding(.horizontal)
             }
         }
     }
@@ -92,6 +92,18 @@ struct HighlightBodyView: View {
 
     var Main: some View {
         VStack(alignment: .leading, spacing: 0) {
+            
+            if self.event.event.referenced_comment_items.first?.content != nil {
+                let all_options = options.union(.no_action_bar)
+                NoteContentView(
+                    damus_state: self.state,
+                    event: self.event.event,
+                    blur_images: should_blur_images(damus_state: self.state, ev: self.event.event),
+                    size: .normal,
+                    options: all_options
+                ).padding(.vertical, 10)
+            }
+            
             HStack {
                 var attributedString: AttributedString {
                     var attributedString: AttributedString = ""
@@ -119,14 +131,17 @@ struct HighlightBodyView: View {
                 RoundedRectangle(cornerRadius: 25).fill(DamusColors.highlight).frame(width: 4),
                 alignment: .leading
             )
+            .padding(.horizontal)
             .padding(.bottom, 10)
 
             if let url = event.url_ref {
                 HighlightLink(state: state, url: url, content: event.event.content)
+                    .padding(.horizontal)
             } else {
                 if let evRef = event.event_ref {
                     if let eventHex = hex_decode_id(evRef) {
                         HighlightEventRef(damus_state: state, event_ref: NoteId(eventHex))
+                            .padding(.horizontal)
                             .padding(.top, 5)
                     }
                 }