Merge pull request #9 from Shchoholiev/bug/SA-222-back-button-fix

bug/SA-222-back-button-fix

lib/main.dart

@@ -18,7 +18,7 @@ class MyApp extends StatefulWidget {
 
   static List<Widget> _widgetOptions = <Widget>[
     WishlistsScreen(),
-    ChatScreen(wishlistId: '', wishlistName: 'New Chat',),
+    ChatScreen(wishlistId: '', wishlistName: 'New Chat', openedFromBottomBar: true),
     Text(''),
   ];
 

lib/screens/chat.dart

@@ -65,8 +65,9 @@ class MessageBubble extends StatelessWidget {
 class ChatScreen extends StatefulWidget {
   String wishlistId;
   String wishlistName;
+  bool openedFromBottomBar; 
 
-  ChatScreen({Key? key, required this.wishlistId, required this.wishlistName}) : super(key: key);
+  ChatScreen({Key? key, required this.wishlistId, required this.wishlistName, required this.openedFromBottomBar}) : super(key: key);
 
   @override
   State createState() => ChatScreenState();
@@ -74,19 +75,23 @@ class ChatScreen extends StatefulWidget {
 
 class ChatScreenState extends State<ChatScreen> {
   var logger = Logger();
-  final SearchService _searchService = SearchService();
+  SearchService _searchService = SearchService();
   List<Message> messages = [];
+  TextEditingController _messageController = TextEditingController();
   List<String> suggestions = [];
-  final TextEditingController _messageController = TextEditingController();
+  bool showBackButton = false;
   bool buttonsVisible = true;
   bool isSendButtonEnabled = false;
   bool showButtonsContainer = true;
   bool isWaitingForResponse = false;
-  final ScrollController _scrollController = ScrollController();
+  ScrollController _scrollController = ScrollController();
   late Widget appBarTitle;
 
   void initState() {
     super.initState();
+    if (widget.openedFromBottomBar) {
+      _resetState();
+    }
     appBarTitle = Text('New Chat', style: TextStyle(fontSize: 18.0));
     _searchService.sseStream.listen((event) {
       _handleSSEMessage(Message(text: '${event.data}'));
@@ -95,11 +100,27 @@ class ChatScreenState extends State<ChatScreen> {
     if(!widget.wishlistId.isEmpty)
     {
       _loadPreviousMessages();
+      showBackButton = true;
       showButtonsContainer = false;
       buttonsVisible = false;
     }
   }
 
+  void _resetState() {
+    widget.wishlistId = '';
+    widget.wishlistName = '';
+    _searchService = SearchService();
+    messages = [];
+    _messageController = TextEditingController();
+    showBackButton = false;
+    buttonsVisible = true;
+    isSendButtonEnabled = false;
+    showButtonsContainer = true;
+    isWaitingForResponse = false;
+    _scrollController = ScrollController();
+    appBarTitle = const Text('New Chat', style: TextStyle(fontSize: 18.0));
+  }
+
   Future<void> _loadPreviousMessages() async {
     final pageNumber = 1;
     final pageSize = 200;
@@ -299,12 +320,14 @@ class ChatScreenState extends State<ChatScreen> {
       appBar: AppBar(
         title: appBarTitle,
         centerTitle: true,
-        leading: IconButton(
+        leading: showBackButton
+            ? IconButton(
                 icon: Icon(Icons.arrow_back),
                 onPressed: () {
-            print('Back button pressed');
+                  Navigator.of(context).pop();
                 },
-        ),
+              )
+            : null,
       ),
       body: Column(
         children: <Widget>[

lib/screens/wishlists.dart

@@ -218,7 +218,7 @@ class _WishlistItemState extends State<WishlistItem> {
                 Navigator.push(
                   context,
                   MaterialPageRoute(
-                    builder: (context) => ChatScreen(wishlistId: widget._wishlist.id, wishlistName: widget._wishlist.name),
+                    builder: (context) => ChatScreen(wishlistId: widget._wishlist.id, wishlistName: widget._wishlist.name, openedFromBottomBar: false),
                   ),
                 );
               },

pubspec.lock

@@ -45,10 +45,10 @@ packages:
     dependency: transitive
     description:
       name: collection
-      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.2"
+    version: "1.18.0"
   connectivity_plus:
     dependency: transitive
     description:
@@ -308,10 +308,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      sha256: a6e590c838b18133bb482a2745ad77c5bb7715fb0451209e1a7567d416678b8e
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   nm:
     dependency: transitive
     description:
@@ -497,18 +497,18 @@ packages:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
       url: "https://pub.dev"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   string_scanner:
     dependency: transitive
     description:
@@ -529,10 +529,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.0"
+    version: "0.6.1"
   typed_data:
     dependency: transitive
     description:
@@ -649,10 +649,10 @@ packages:
     dependency: transitive
     description:
       name: web
-      sha256: dc8ccd225a2005c1be616fe02951e2e342092edf968cf0844220383757ef8f10
+      sha256: afe077240a270dcfd2aafe77602b4113645af95d0ad31128cc02bce5ac5d5152
       url: "https://pub.dev"
     source: hosted
-    version: "0.1.4-beta"
+    version: "0.3.0"
   web_socket_channel:
     dependency: transitive
     description:
@@ -694,5 +694,5 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.1.4 <4.0.0"
+  dart: ">=3.2.0-194.0.dev <4.0.0"
   flutter: ">=3.13.0"