Flutter Notes App with Firebase

A complete Flutter notes application with Firebase Authentication and Cloud Firestore integration using Provider for state management.

Features

• Separate Authentication Screens: Dedicated Sign In and Sign Up screens
• Firebase Authentication: Email/Password signup and login with comprehensive validation
• Real-time CRUD Operations: Create, Read, Update, Delete notes with instant UI updates
• Provider State Management: Clean architecture eliminating all setState() calls
• Real-time Firestore Sync: Live data synchronization with Firestore database
• Input Validation: Comprehensive form validation with specific error messages
• User Feedback: Color-coded SnackBar notifications (green success, red error)
• Clean UI: Material Design 3 with responsive layouts and polished Cards
• Session Persistence: User stays logged in across app restarts
• Error Handling: Comprehensive error handling for all operations

Architecture

This project follows clean architecture principles with complete separation of concerns:

Firebase Integration

Setup Requirements

1. Firebase Project: Created at Firebase Console
2. Authentication: Email/Password provider enabled
3. Firestore Database: Created with proper security rules
4. Firestore Indexes: Required for real-time queries
5. Platform Configuration:
   • android/app/google-services.json (Android)
   • firebase_options.dart (Generated via FlutterFire CLI)

Getting Started

Prerequisites

• Flutter SDK (latest stable)
• Firebase CLI
• FlutterFire CLI

Installation Steps

1. Clone the repository

   git clone [your-repo-url]
   cd flutter-notes-app-firebase

2. Install dependencies

   flutter pub get

3. Firebase Configuration

   npm install -g firebase-tools
   dart pub global activate flutterfire_cli
   flutterfire configure

4. Firestore Indexes Setup CRITICAL STEP

   firebase login
   firebase init firestore

5. Run the application

   flutter run

CRUD Operations

• Create: await addNote(text, userId) - Instant UI update via stream
• Read: startListeningToNotes(userId) - Real-time streaming
• Update: await updateNote(noteId, text) - Immediate reflection
• Delete: await deleteNote(noteId) - Real-time removal

Dart Analyzer Results

Security Implementation

• User Data Isolation: Notes secured by userId
• Authentication Required: All operations require valid auth
• Firestore Rules: Server-side security enforcement
• Input Validation: Client-side data sanitization
• Error Information: Sensitive details not exposed to users

License

Educational project - ALU Individual Assignment 2