fix an issue where the group won't be deleted

SessionMessagingKit/Database/Models/Interaction.swift

@@ -422,7 +422,6 @@ public struct Interaction: Codable, Identifiable, Equatable, FetchableRecord, Mu
 
 public extension Interaction {
     func with(
-        variant: Variant? = nil,
         serverHash: String? = nil,
         authorId: String? = nil,
         body: String? = nil,
@@ -439,7 +438,7 @@ public extension Interaction {
             messageUuid: self.messageUuid,
             threadId: self.threadId,
             authorId: (authorId ?? self.authorId),
-            variant: (variant ?? self.variant),
+            variant: self.variant,
             body: (body ?? self.body),
             timestampMs: (timestampMs ?? self.timestampMs),
             receivedAtTimestampMs: self.receivedAtTimestampMs,

SessionMessagingKit/Sending & Receiving/Message Handling/MessageSender+ClosedGroups.swift

@@ -529,10 +529,15 @@ extension MessageSender {
                             publicKey: userPublicKey
                         )
                         
-                        try interaction.with(
-                            variant: .infoClosedGroupCurrentUserLeft,
-                            body: "GROUP_YOU_LEFT".localized()
-                        ).update(db)
+                        try Interaction
+                            .filter(id: interactionId)
+                            .updateAll(
+                                db,
+                                [
+                                    Interaction.Columns.variant.set(to: Interaction.Variant.infoClosedGroupCurrentUserLeft),
+                                    Interaction.Columns.body.set(to: "GROUP_YOU_LEFT".localized())
+                                ]
+                            )
                         
                         // Update the group (if the admin leaves the group is disbanded)
                         let wasAdminUser: Bool = try GroupMember

SessionMessagingKit/Shared Models/SessionThreadViewModel.swift

@@ -100,7 +100,7 @@ public struct SessionThreadViewModel: FetchableRecordWithRowId, Decodable, Equat
     public var canWrite: Bool {
         switch threadVariant {
             case .contact: return true
-            case .closedGroup: return currentUserIsClosedGroupMember == true
+            case .closedGroup: return (currentUserIsClosedGroupMember == true) && (interactionVariant?.isGroupLeavingStatus != true)
             case .openGroup: return openGroupPermissions?.contains(.write) ?? false
         }
     }