Added functionality to create chat

lib/view/pages/talk/chatList.dart

@@ -1,8 +1,11 @@
 
 import 'dart:async';
 import 'package:flutter/material.dart';
+import 'package:marianum_mobile/api/marianumcloud/talk/createRoom/createRoomParams.dart';
+import 'package:marianum_mobile/widget/confirmDialog.dart';
 import 'package:provider/provider.dart';
 
+import '../../../api/marianumcloud/talk/createRoom/createRoom.dart';
 import '../../../model/chatList/chatListProps.dart';
 import '../../../storage/base/settingsProvider.dart';
 import 'chatTile.dart';
@@ -51,8 +54,24 @@ class _ChatListState extends State<ChatList> {
       floatingActionButton: FloatingActionButton(
         heroTag: "createChat",
         backgroundColor: Theme.of(context).primaryColor,
-        onPressed: () {
-          showSearch(context: context, delegate: JoinChat());
+        onPressed: () async {
+          showSearch(context: context, delegate: JoinChat()).then((username) {
+            if(username == null) return;
+            
+            ConfirmDialog(
+              title: "Chat starten",
+              content: "Möchtest du einen Chat mit nutzer '$username' starten?",
+              confirmButton: "Chat starten",
+              onConfirm: () {
+                CreateRoom(CreateRoomParams(
+                  roomType: 1,
+                  invite: username,
+                )).run().then((value) {
+                  _query(renew: true);
+                });
+              },
+            ).asDialog(context);
+          });
         },
         child: const Icon(Icons.add_comment_outlined),
       ),