implemented basic settings into the backend, renamed files, fixed bugs, and added back button functionality

mobile/app/lib/components/conversation_thread/conversation.dart

@@ -1,4 +1,4 @@
-import 'package:app/util/server.dart';
+import 'package:app/util/backend.dart';
 import 'package:flutter/material.dart';
 import 'chat.dart';
 
@@ -6,19 +6,30 @@ class Conversation with ChangeNotifier {
   int conversationID;
   String conversationLabel;
   String conversationSubLabel;
+  bool history = true;
+  // History is disabled by default. This means chats are auto-deleted once the user exits that conversation.
+  bool conversationContext = true; // The prior prompts and responses are used as additional context for the next prompt and response.
+  late bool stream = false; // Update the UI with a stream of characters as received from the server, or as one text.
   List<Chat> chats = [];
 
   Conversation(this.conversationID, this.conversationLabel, this.conversationSubLabel);
 
   Conversation.completeConversation(this.conversationID, this.conversationLabel, this.conversationSubLabel, this.chats);
 
+  void toggleHistory() => history = !history;
+
+  void toggleConversationContext() => conversationContext = !conversationContext;
+
+  void toggleStream() => stream = !stream;
+
   void add(Chat message) {
     chats.add(message);
     notifyListeners();
   }
 
   void loadChats() {
-    chats = Backend.getChatsByConversationID(conversationID);
+    Backend.loadConversation;
+    chats = Backend.loadedChats;
   }
 
   void setLabel() {

mobile/app/lib/components/conversation_thread/conversation_thread_model.dart

@@ -1,7 +1,7 @@
 import 'package:app/components/conversation_thread/chat_bubble_model.dart';
 import 'package:app/components/conversation_thread/chat.dart';
 import 'package:app/components/conversation_thread/conversation.dart';
-import 'package:app/util/server.dart';
+import 'package:app/util/backend.dart';
 
 import 'package:app/components/prompt_box/prompt_box_widget.dart';
 import 'package:flutterflow_ui/flutterflow_ui.dart';

mobile/app/lib/components/conversation_thread/conversation_thread_widget.dart

@@ -1,5 +1,5 @@
 import 'package:app/components/conversation_thread/conversation.dart';
-import 'package:app/util/server.dart';
+import 'package:app/util/backend.dart';
 import 'package:provider/provider.dart';
 
 import '/components/conversation_thread/chat_bubble_widget.dart';

mobile/app/lib/components/popup/popup_widget.dart

@@ -84,7 +84,7 @@ class _PopupWidgetState extends State<PopupWidget> {
                         child: Padding(
                           padding: EdgeInsetsDirectional.fromSTEB(0, 0, 12, 0),
                           child: Text(
-                            'Refine the components modal.',
+                            'A popup',
                             style: AppTheme.headlineMedium,
                           ),
                         ),
@@ -106,12 +106,12 @@ class _PopupWidgetState extends State<PopupWidget> {
                     ],
                   ),
                   const Divider(
-                    height: 24,
+                    height: 12,
                     thickness: 2,
                     color: Color(0xFFF1F4F8),
                   ),
                   const Text(
-                    'FlutterFlow is a visual development platform that allows you to easily create beautiful and responsive user interfaces for your mobile and web applications. With its drag-and-drop interface and pre-built components, you can quickly prototype and build your app without writing any code. \nAdditionally, FlutterFlow\'s real-time preview feature allows you to see your changes in real-time and make adjustments on the fly.',
+                    'Test',
                     style: AppTheme.labelMedium,
                   ),
                   Padding(
@@ -147,7 +147,7 @@ class _PopupWidgetState extends State<PopupWidget> {
                           onPressed: () {
                             print('Button pressed ...');
                           },
-                          text: 'Create Task',
+                          text: 'Action',
                           options: FFButtonOptions(
                             width: 130,
                             height: 40,

mobile/app/lib/components/prompt_box/prompt_box_widget.dart

@@ -1,4 +1,4 @@
-import 'package:app/util/server.dart';
+import 'package:app/util/backend.dart';
 import 'package:flutterflow_ui/flutterflow_ui.dart';
 import 'package:easy_debounce/easy_debounce.dart';
 import 'package:flutter/material.dart';
@@ -209,7 +209,8 @@ class _PromptBoxWidgetState extends State<PromptBoxWidget> {
                       validator: _model.textControllerValidator.asValidator(context),
                       textInputAction: TextInputAction.send, // "Send" on keyboard
                       onFieldSubmitted: (text) {
-                        Backend.respondWhenReady(text); // TODO: Connect with multimedia
+                        entry_text = _model.textController.text;
+                        Backend.respondWhenReady(entry_text); // TODO: Connect with multimedia
                         _model.textController?.clear(); // Clear the text field
                       },
                     ),

mobile/app/lib/pages/conversation_widget.dart

@@ -5,6 +5,7 @@ import '/components/conversation_thread/conversation_thread_widget.dart';
 import '/components/model_item/model_item_widget.dart';
 import 'package:flutterflow_ui/flutterflow_ui.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 
 import 'package:app/theme.dart';
 
@@ -64,17 +65,9 @@ class _ConversationWidgetState extends State<ConversationWidget> {
             ),
             onPressed: () async {
               print("something pressed in conversation_widget.dart");
-              // TODO
+              // TODO: Smooth out the animation to prevent the conversations list from loading half-way up the screen.
-              // context.goNamed(
+              SystemChannels.textInput.invokeMethod('TextInput.hide');
-              //   'ConversationsList',
+              Navigator.pop(context);
-              //   extra: <String, dynamic>{
-              //     kTransitionInfoKey: TransitionInfo(
-              //       hasTransition: true,
-              //       transitionType: PageTransitionType.leftToRight,
-              //       duration: const Duration(milliseconds: 250),
-              //     ),
-              //   },
-              // );
             },
           ),
           title: wrapWithModel(

mobile/app/lib/pages/conversations_list_widget.dart

@@ -2,11 +2,12 @@ import 'package:app/components/conversation_thread/conversation.dart';
 import 'package:app/theme.dart';
 
 import 'package:app/pages/conversation_widget.dart';
-import 'package:app/util/server.dart';
+import 'package:app/util/backend.dart';
 
 import 'package:flutterflow_ui/flutterflow_ui.dart';
 import 'package:flutter/material.dart';
 
+import 'package:app/components/options_dialog/options_dialog_widget.dart';
 import 'conversations_list_model.dart';
 export 'conversations_list_model.dart';
 
@@ -48,6 +49,20 @@ class _ConversationsListWidgetState extends State<ConversationsListWidget> {
 
   @override
   Widget build(BuildContext context) {
+    // Clean conversation list prior to building widgets, to prevent bloating UI with empty conversations.
+    // Additionally, delete conversations that have history disabled.
+    for(int i = 0; i < conversations.length; i++) {
+      if(
+        conversations[i].conversation.getChats().isEmpty ||
+        !conversations[i].conversation.history
+      ) {
+        Backend.conversations.removeAt(i);
+        conversations.removeAt(i);
+        Backend.maxConversationID--; // maxConversationID will eventually be deprecated with better ID system.
+        i--;
+      }
+    }
+
     return GestureDetector(
       onTap: () => _model.unfocusNode.canRequestFocus
           ? FocusScope.of(context).requestFocus(_model.unfocusNode)
@@ -181,6 +196,24 @@ class _ConversationsListWidgetState extends State<ConversationsListWidget> {
                                     )
                                   },
                                   onLongPress: () => {
+                                      showModalBottomSheet(
+                                        isScrollControlled: true,
+                                        backgroundColor:
+                                        Colors.transparent,
+                                        enableDrag: false,
+                                        useSafeArea: true,
+                                        context: context,
+                                        builder: (context) {
+                                          return Padding(
+                                            padding:
+                                            MediaQuery.viewInsetsOf(
+                                                context),
+                                            child: const PopupWidget(),
+                                          );
+                                        },
+                                      ).then((value) =>
+                                          safeSetState(() {})),
+
                                     // TODO: Need to implement.
                                     print("opening options")
                                   },
@@ -197,7 +230,7 @@ class _ConversationsListWidgetState extends State<ConversationsListWidget> {
                   right: 20.0, // Adjust positioning as needed
                   child: FloatingActionButton(
                     onPressed: () => {
-                      Backend.loadConversation(Backend.maxConversationID), // TODO: Dynamically get the next ID
+                      Backend.loadConversation(Backend.createConversation()), // TODO: Dynamically get the next ID
                       conversations.add(ConversationWidget(conversation: Backend.getLoadedConversation())),
                       Navigator.push(
                         context,

mobile/app/lib/pages/settings_widget.dart

@@ -1169,6 +1169,7 @@ class _SettingsWidgetState extends State<SettingsWidget>
                                             focusColor: Colors.transparent,
                                             hoverColor: Colors.transparent,
                                             highlightColor: Colors.transparent,
+                                            // TODO: Should open in a browser rather than in-app?
                                             onTap: () async {
                                               await showModalBottomSheet(
                                                 isScrollControlled: true,

mobile/app/lib/util/backend.dart

@@ -11,10 +11,10 @@ import 'model.dart';
 // Uses Singleton design pattern to ensure that any server references across the app are using the same instance.
 class Backend {
   //     SERVER VARIABLES
-  static final Backend _single_backend = Backend._internal();
+  static final Backend singleBackend = Backend._internal();
   Backend._internal();
   // TODO: One-time process to establish server connection is required for easy setup/maintenance.
-  static final url = "http://10.0.2.2:11434/api/"; // For emulated device in testing
+  static const url = "http://10.0.2.2:11434/api/"; // For emulated device in testing
   //static final url = "http://192.168.1.68:11434/api"; // For local access to home server
   static String endpoint = "";
   static final Map<String, String> headers = {'Content-Type': 'application/json'};
@@ -27,16 +27,16 @@ class Backend {
 
 
 
-  //     PRIVACY VARIABLES
+  //     PRIVACY-FOCUSED VARIABLES
-  static bool _historyEnabled = true;
+  // TODO: Reorder based on most recent usage.
-  static late int conversationID;
-  static late int maxConversationID;
   static List<Conversation> conversations = [];
   static List<Chat> loadedChats = [];
-
+  static late Conversation loadedConversation;
 
 
   //     RUNTIME & STATUS VARIABLES
+  static late int conversationID;
+  static late int maxConversationID;
   static late Model model;
   static String prompt = "";
   static String response = "";
@@ -50,7 +50,7 @@ class Backend {
 
     // loadedChats = conversations[conversationID].chats;
 
-    return _single_backend;
+    return singleBackend;
   }
 
   void init() {
@@ -61,31 +61,19 @@ class Backend {
     model = Model("llama3"); // Primarily used llama3, testing gemma2
 
     // TODO: Dynamically obtain conversations.
-    conversations.add(
-      Conversation.completeConversation(
-        0,
-        "Test Conversation",
-        "Testing Functionality",
-        [
-          (Chat("Hello there! You are part of a prototype and are running locally on my Macbook Air. Please keep your responses brief as every prompt freezes my computer.", true)),
-          (Chat("Understood! How can I help?", false)),
-        ]
-      )
-    );
-
-    maxConversationID = conversations.length;
-
     // conversations.add(
     //   Conversation.completeConversation(
-    //         1,
+    //     0,
-    //         "Label test",
+    //     "Test Conversation",
-    //         "Sub-label Test",
+    //     "Testing Functionality",
     //     [
-    //           (Chat("A different test. Only reply No.", true)),
+    //       (Chat("Hello there! You are part of a prototype and are running locally on my Macbook Air. Please keep your responses brief as every prompt freezes my computer.", true)),
-    //           (Chat("No.", false)),
+    //       (Chat("Understood! How can I help?", false)),
     //     ]
     //   )
     // );
+
+    maxConversationID = conversations.length;
   }
 
 
@@ -115,21 +103,32 @@ class Backend {
 
 
   //     CONVERSATION MANAGEMENT
+  @Deprecated("")
   static List<Conversation> getConversationsList() { return conversations; }
 
-  static Conversation getLoadedConversation() { return conversations[conversationID]; }
+  static Conversation getLoadedConversation() { return loadedConversation; }
 
   // Load conversation should be called prior to any other server requests.
   static void loadConversation(id) {
     conversationID = id;
-    if(maxConversationID == id) {
+
-      conversations.add(Conversation(conversationID, "Conversation $id", "Another AI conversation"));
+    loadedConversation = conversations[id];
-      maxConversationID++;
+    loadedChats = loadedConversation.chats;
   }
 
-    loadedChats = conversations[conversationID].chats;
+  // TODO: Better conversation ID management is needed. Preferably randomized IDs to not indicate the number of conversations.
+  static int createConversation() {
+    int id = conversations.length;
+    conversations.add(Conversation(id, "Conversation $id", "Another AI conversation"));
+    return id;
   }
 
+  static void deleteConversation(id) {
+    loadedChats = conversations[conversationID].chats; // TODO: Temporarily saving the chats for "undo" popup.
+    conversations.removeAt(id);
+  }
+
+  @Deprecated('Just directly get loadedChats list. Unless multiple chats can be opened simultaneously?')
   static List<Chat> getChatsByConversationID(id) { return conversations[id].chats; }
 
 
@@ -155,7 +154,7 @@ class Backend {
     // TODO: Allow for different models to be dynamically selected.
     Map<String, dynamic> data;
 
-    if(_historyEnabled) {
+    if(conversations[conversationID].conversationContext) {
       loadedChats = [...loadedChats, Chat(prompt, true)];
       endpoint = "chat";
 
@@ -164,7 +163,7 @@ class Backend {
       data = {
         "model": model.name,
         "messages": messageList,
-        "stream": false,
+        "stream": loadedConversation.stream,
       };
     }
     else {
@@ -172,7 +171,7 @@ class Backend {
       data = {
         "model": model.name,
         "prompt": prompt,
-        "stream": false,
+        "stream": loadedConversation.stream,
       };
     }
 
@@ -182,6 +181,8 @@ class Backend {
 
   // Send the HTTP request to the server.
   static void httpSendRequest() async {
+    // TODO: Add AES256 encryption to the prompt/messages thread.
+    // TODO: Add SHA256 checksum to be sent and verified to prevent/notify in case of data loss.
     String json = constructPrompt();
 
     // Send the HTTP POST request
@@ -193,7 +194,7 @@ class Backend {
 
     if (serverResponse.statusCode == 200) {
       Map<String, dynamic> re = jsonDecode(serverResponse.body);
-      if(_historyEnabled) {
+      if(conversations[conversationID].conversationContext) {
         response = re["message"]["content"];
         loadedChats = [...loadedChats, Chat(response, false)];
       } else {