+--------------------------------+
                        |        User Launches App       |
                        +--------------------------------+
                                   |
                           Check if User is Logged In
                                   |
                    +--------------+---------------+
                    |                              |
            +---------------+              +---------------------+
            | Not Logged In |              | Logged In           |
            +---------------+              +---------------------+
                    |                              |
                Show LoginScreen                 Show NotesListScreen
                    |                              |
+-------------------+------------------------------+------------------+
|                                                               |
|   If internet is available, sync notes with Firebase           |
|   If offline, fetch notes from Room DB                         |
|                                                               |

+---------------+ +----------------+ +--------------------+ | Firebase Auth | | Fetch from Room | | Firebase Firestore | | Login | | DB if Offline | | Sync (Add, Edit, Delete)| +---------------+ +----------------+ +--------------------+ | | | +-------------+ +-------------------+ +--------------------+ | Success | | Show Notes List | | Upload/Delete | +-------------+ +-------------------+ +--------------------+ | | | +---------------+ +-------------------+ +---------------------+ | Add/Edit Note | | Sync with Firebase| | Show Notes List | +---------------+ +-------------------+ +---------------------+ | | Add Image Feature Delete Note Feature | Save Image in Firebase Storage