🌍 Travello - Travel Management System 🧳

Travello is a travel management system built with Flutter, offering a seamless experience for clients and admins. Firebase powers its authentication, real-time data, and secure storage.

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🛠️ Project Structure

• t_client: A mobile app for clients to manage bookings, view itineraries, and get real-time updates.
• t_admin: A web app for admins to manage bookings, client data, and content.

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✨ Travello Features

🚶 End-user (Traveler) Features

The t_client mobile app offers:

• 🛡️ Sign In/Register: Secure authentication.
• 🗺️ Browse Travel Packages: View and search for travel deals.
• 📅 Place Bookings: Reserve travel packages effortlessly.
• 🚀 Track Orders: Stay updated on booking status.
• 💬 Chat with Admin: Get support in real-time.
• ❤️ Save Favorites: Bookmark favorite packages.
• ❌ Cancel Bookings: Easy booking cancellations.
• 💳 Payments: Secure Khalti payment gateway integration.
• 📍 Nearest Destinations Map: Explore nearby locations interactively.
• 🌅 360 Panoramic View: Immerse in destinations through a 360° experience.

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📋 Admin Features

The t_admin web app offers:

• 🔐 Sign In: Secure admin authentication.
• 👥 User & Booking Management: Manage client accounts and reservations.
• ✏️ CRUD Travel Packages: Create, read, update, and delete travel deals.
• 📌 Manage Booking Status: Update and cancel reservations.
• 🗨️ Chat with Clients: Direct communication for support.

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⚙️ Tools & Technologies

• Flutter
• Firebase: Authentication, Firestore, Storage
• Khalti Payment Gateway
• Open Street Maps & Geolocation

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🧱 Project Architecture

The architecture is divided into four main layers:

1. Data
   Responsible for managing data-related logic such as API calls and database operations.

2. Domain
   Contains business logic, use cases, and entity models, ensuring separation from data sources.

3. Presentation
   Handles UI components and state management.

4. Core
   Holds reusable components and global configurations used across the app.

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🛠️ SOLID Principles in Flutter

This project adheres to the SOLID principles through a well-structured layered architecture. Each layer has a specific responsibility, and the core folder encapsulates reusable components and global utilities, ensuring scalability, maintainability, and testability.

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🔄 SOLID Principle Breakdown

🛠️ Single Responsibility Principle (SRP)

Each class has a single, well-defined responsibility.
Example:
AuthRepo handles only Authentication.

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🛠️ Open/Closed Principle (OCP)

Classes are open for extension but closed for modification.
Example:
Adding a new API endpoint without modifying existing code by creating a new method in ApiClient.

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🛠️ Liskov Substitution Principle (LSP)

Subtypes must be substitutable for their base types.
Example:
UserRepositoryImpl seamlessly replaces UserRepository.

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🛠️ Interface Segregation Principle (ISP)

Interfaces are small and specific to client needs.
Example:
Separate interfaces for UserRepository and ProductRepository.

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🛠️ Dependency Inversion Principle (DIP)

High-level modules depend on abstractions, not concrete implementations.
Example:
UserBloc depends on the abstract UserRepository rather than UserRepositoryImpl.

Folder Structure

lib/
├── core/
│   ├── widgets/
│   ├── utils/
│   ├── constants.dart
│   ├── theme.dart
│
├── data/
│   ├── repositories/
│   ├── sources/
│   ├── models/
│
├── domain/
│   ├── entities/
│   ├── usecases/
│
├── presentation/
│   ├── screens/
│   ├── blocs/
│   ├── widgets/

Getting Started

1. Flutter SDK Ensure you have Flutter SDK version >=3.0.5 installed. Install Flutter if not already set up.

2. FlutterFire CLI Install the FlutterFire CLI, which simplifies Firebase configuration for Flutter projects:

   dart pub global activate flutterfire_cli

3. Clone the Repository: Clone this repository to your local machine

   git clone https://github.com/Sushil787/Single-Vendor-Travel.git
   cd travel_management_system/apps

   Since the project includes both a client app and an admin web app, you need to configure Firebase for both parts of the application.

   cd t_admin or cd t_client

4. Install Dependencies Install all project dependencies using the following command:

   flutter pub get

5. Configure Firebase with FlutterFire CLI

   flutterfire configure

   The FlutterFire CLI will generate a firebase_options.dart file with your Firebase configuration. Make sure this file is imported in your main.dart file for Firebase initialization.

6. Generate Code with build_runner The project uses generated models, Bloc state and event classes for state management. Run the following command to generate necessary files:

   flutter pub run build_runner build --delete-conflicting-outputs

   This will generate:

   • Models for data management and serialization.
   • State Classes and Bloc Files for managing app state and events. Note: Run this command every time you make changes to models, state, or event classes.

7. Run the App After configuring Firebase and generating the necessary files, you can now run the app:

   flutter run

Important Packages

State Management

• flutter_bloc: Used for managing the app's state across different components, ensuring clear state transitions and predictable behaviors.
• get_it: Acts as a service locator for dependency injection, helping to manage and retrieve services and data classes from anywhere in the app.

Payment Integration

• khalti_flutter: Used for secure payment processing, allowing users to complete transactions directly in the app. Khalti integration ensures a smooth and secure transaction process, providing a trusted payment gateway for users to make online payments for bookings and other services.

Firebase Integration

• firebase_auth: Manages user authentication, enabling sign-in and sign-out flows using Firebase's secure authentication methods.
• cloud_firestore: Used for real-time data storage and syncing, allowing users to access data such as bookings, itineraries, and user profiles.
• firebase_storage: Stores user-uploaded files, such as profile images or travel documents, securely on Firebase’s cloud storage.
• firebase_messaging: Enables push notifications, allowing real-time updates to be sent to users for bookings, offers, and other relevant alerts.

Location & Mapping

• geolocator: Provides real-time location tracking for users, assisting in calculating travel distances or nearby landmarks.
• latlong2: Handles geographic location data, crucial for mapping functionalities and integrating with various geolocation-based services.
• flutter_osm_plugin and flutter_map: Used for integrating interactive maps within the app, allowing users to view locations and itineraries visually on a map.

Data Persistence & Caching

• hive and hive_flutter: Provides lightweight, offline storage capabilities, which are ideal for storing small data sets like user preferences and session information.

User Interface & Experience

• google_fonts: Allows for customizable fonts, enhancing the app’s design and readability.
• shimmer: Provides a shimmer loading effect, creating an engaging placeholder while data is being loaded.
• panorama_viewer: Allows users to explore panoramic images, enhancing user engagement with immersive visuals.

Notifications & Updates

• flutter_local_notifications: Handles in-app notifications, allowing timely alerts for booking updates, travel reminders, and more.
• in_app_update: Facilitates in-app updates, ensuring users have the latest version of the app without leaving the application.

Utility Packages

• image_picker: Lets users upload profile pictures or document images directly from their camera or gallery.
• connectivity_plus: Detects network connectivity, prompting users in case of offline access.
• uuid: Used for generating unique IDs, which are essential for data such as bookings or user sessions.

Code Generation

• json_serializable and json_annotation: Automatically generate code for serializing and deserializing JSON data, simplifying data exchange between the app and backend.
• freezed and freezed_annotation: Provides immutable data classes and union types, essential for maintaining a clean data model.
• injectable and injectable_generator: Helps in dependency injection, making the app modular and testable.
• build_runner: A utility for code generation, used alongside json_serializable, and freezed.

Additional Information

To run this project, ensure the required Firebase setup (Firebase Authentication, Firestore, and Firebase Storage) is configured, and dependencies are installed.

Developer Note

• Adhere to coding standards and best practices established in the project.
• Thoroughly test new features and changes before integration.
• Regularly review and update documentation to reflect changes in the project.

Screenshots

Mobile App

Web App