Update MentionCandidateSelectionView for group chat changes

Signal/src/Loki/MentionCandidateSelectionView.swift

@@ -4,9 +4,16 @@
 @objc(LKMentionCandidateSelectionView)
 final class MentionCandidateSelectionView : UIView, UITableViewDataSource, UITableViewDelegate {
     @objc var mentionCandidates: [Mention] = [] { didSet { tableView.reloadData() } }
-    @objc var hasGroupContext = false
+    @objc var publicChatServer: String?
+    var publicChatServerID: UInt64?
     @objc var delegate: MentionCandidateSelectionViewDelegate?
     
+    // MARK: Convenience
+    @objc(setPublicChatServerID:)
+    func setPublicChatServerID(to publicChatServerID: UInt64) {
+        self.publicChatServerID = publicChatServerID != 0 ? publicChatServerID : nil
+    }
+    
     // MARK: Components
     @objc lazy var tableView: UITableView = { // TODO: Make this private
         let result = UITableView()
@@ -44,7 +51,8 @@ final class MentionCandidateSelectionView : UIView, UITableViewDataSource, UITab
         let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! Cell
         let mentionCandidate = mentionCandidates[indexPath.row]
         cell.mentionCandidate = mentionCandidate
-        cell.hasGroupContext = hasGroupContext
+        cell.publicChatServer = publicChatServer
+        cell.publicChatServerID = publicChatServerID
         return cell
     }
     
@@ -61,7 +69,8 @@ private extension MentionCandidateSelectionView {
     
     final class Cell : UITableViewCell {
         var mentionCandidate = Mention(hexEncodedPublicKey: "", displayName: "") { didSet { update() } }
-        var hasGroupContext = false
+        var publicChatServer: String?
+        var publicChatServerID: UInt64?
         
         // MARK: Components
         private lazy var profilePictureImageView = AvatarImageView()
@@ -121,8 +130,12 @@ private extension MentionCandidateSelectionView {
             displayNameLabel.text = mentionCandidate.displayName
             let profilePicture = OWSContactAvatarBuilder(signalId: mentionCandidate.hexEncodedPublicKey, colorName: .blue, diameter: 36).build()
             profilePictureImageView.image = profilePicture
-            let isUserModerator = LokiGroupChatAPI.isUserModerator(mentionCandidate.hexEncodedPublicKey, for: 1, on: "https://chat.lokinet.org") // FIXME: Mentions need to work for every kind of chat
-            moderatorIconImageView.isHidden = !isUserModerator || !hasGroupContext
+            if let publicChatServer = publicChatServer, let publicChatServerID = publicChatServerID {
+                let isUserModerator = LokiGroupChatAPI.isUserModerator(mentionCandidate.hexEncodedPublicKey, for: publicChatServerID, on: publicChatServer)
+                moderatorIconImageView.isHidden = !isUserModerator
+            } else {
+                moderatorIconImageView.isHidden = true
+            }
         }
     }
 }

Signal/src/ViewControllers/ConversationView/ConversationInputToolbar.m

@@ -1093,7 +1093,12 @@ const CGFloat kMaxTextViewHeight = 98;
 
 - (void)showMentionCandidateSelectionViewFor:(NSArray<LKMention *> *)mentionCandidates in:(TSThread *)thread
 {
-    self.mentionCandidateSelectionView.hasGroupContext = thread.isGroupThread; // Must happen before setting the users
+    __block LKGroupChat *groupChat;
+    [OWSPrimaryStorage.sharedManager.dbReadConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
+        groupChat = [LKDatabaseUtilities getGroupChatForThreadID:thread.uniqueId transaction:transaction];
+    }];
+    self.mentionCandidateSelectionView.publicChatServer = groupChat.server;
+    [self.mentionCandidateSelectionView setPublicChatServerID:groupChat.channel];
     self.mentionCandidateSelectionView.mentionCandidates = mentionCandidates;
     self.mentionCandidateSelectionViewSizeConstraint.constant = 6 + MIN(mentionCandidates.count, 4) * 52;
     [self setNeedsLayout];