Add missing messages fetch & display name update

Signal/src/Loki/NewPublicChatVC.swift

@@ -83,9 +83,12 @@ final class NewPublicChatVC : OWSViewController {
             return showError(title: NSLocalizedString("Invalid URL", comment: ""), message: NSLocalizedString("Please check the URL you entered and try again.", comment: ""))
         }
         updateAddButton(isConnecting: true)
-        // TODO: Upon adding we should fetch previous messages
+        let urlAsString = url.absoluteString
-        LokiPublicChatManager.shared.addChat(server: url.absoluteString, channel: 1)
+        let displayName = OWSProfileManager.shared().localProfileName()
+        LokiPublicChatManager.shared.addChat(server: urlAsString, channel: 1)
         .done(on: .main) { [weak self] _ in
+            let _ = LokiGroupChatAPI.getMessages(for: 1, on: urlAsString)
+            let _ = LokiGroupChatAPI.setDisplayName(to: displayName, on: urlAsString)
             self?.presentingViewController!.dismiss(animated: true, completion: nil)
         }
         .catch(on: .main) { [weak self] _ in