TravelBook - Premium Travel Booking System

A professional C++ travel booking application featuring both a Console Interface and a Premium GUI built with the Nana C++ Library. Demonstrates advanced Object-Oriented Programming concepts with a focus on clean architecture and code reusability.

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Project Information

Field	Value
Course	Object-Oriented Programming with C++
Author	Muhammad Tasiu-20231723, Muhammad Auwal-20231925, Muhammad Lele-20231940
Date	January 2026
Language	C++17
GUI Framework	Nana C++ Library
Build System	CMake / Make

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Features

Core Functionality

• Flight Booking: Search and book flights by origin/destination with seat class selection
• Hotel Booking: Search and book hotels by city and star rating
• Smart Recommendations: After booking a flight, automatically suggests hotels at your destination
• User Management: Register, login, and manage your profile
• Booking Management: View all bookings with the ability to cancel
• Data Persistence: All data saved to text files automatically
• Premium GUI: Dark-themed modern interface with professional styling

User Interface Options

Interface	Description
Console (TravelBookingConsole)	Full-featured text-based menu system
GUI (TravelBookingGUI)	Premium dark-themed graphical interface with Nana

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OOP Concepts Demonstrated

Class Hierarchy

Bookable (Abstract Base)
├── Flight
└── Hotel

Booking (Abstract Base)
├── FlightBooking
└── HotelBooking

User
BookingSystem (Controller/Manager)
Menu (Console UI)
MainWindow (GUI)

Concept Implementation Table

OOP Concept	Where Implemented	Example
Inheritance	Flight : Bookable, Hotel : Bookable	Derived classes extend abstract base
Polymorphism	displayInfo(), isAvailable(), getType()	Virtual functions with runtime dispatch
Encapsulation	All classes	Private members with public getters/setters
Abstraction	Bookable, Booking classes	Pure virtual functions (= 0)
Composition	BookingSystem	Contains vectors of bookings, flights, hotels, users
Smart Pointers	BookingSystem	std::unique_ptr for automatic memory management
STL Containers	Throughout	std::vector, std::string, algorithms
RAII	File handling	Resources released in destructors
Const Correctness	All getter methods	const member functions

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Project Architecture

Directory Structure

OOP_CPP_Project/
├── include/                    # Header files (.h)
│   ├── Bookable.h             # Abstract base class for bookable items
│   ├── Flight.h               # Flight class - inherits Bookable
│   ├── Hotel.h                # Hotel class - inherits Bookable
│   ├── User.h                 # User account management
│   ├── Booking.h              # Abstract base class for bookings
│   ├── FlightBooking.h        # Flight booking - inherits Booking
│   ├── HotelBooking.h         # Hotel booking - inherits Booking
│   ├── BookingSystem.h        # Central system controller
│   ├── Menu.h                 # Console menu interface
│   └── gui/                   # GUI components
│       ├── MainWindow.h       # Main application window
│       ├── FlightSearchPanel.h
│       ├── HotelSearchPanel.h
│       └── Styles.h           # Premium styling constants
├── src/                        # Implementation files (.cpp)
│   ├── Bookable.cpp
│   ├── Flight.cpp
│   ├── Hotel.cpp
│   ├── User.cpp
│   ├── Booking.cpp
│   ├── FlightBooking.cpp
│   ├── HotelBooking.cpp
│   ├── BookingSystem.cpp
│   ├── Menu.cpp
│   ├── main.cpp               # Console entry point
│   └── gui/
│       ├── MainWindow.cpp
│       └── gui_main.cpp       # GUI entry point
├── lib/
│   └── nana/                  # Nana GUI library (submodule)
├── data/                       # Persistent data files
│   ├── flights.txt
│   ├── hotels.txt
│   ├── users.txt
│   └── bookings.txt
├── build/                      # Build output (generated)
├── CMakeLists.txt             # CMake configuration
├── Makefile                   # Make configuration
└── README.md                  # This documentation

Class Descriptions

Abstract Base Classes

Class	Purpose	Key Virtual Methods
Bookable	Base for items that can be booked	displayInfo(), isAvailable(), getType()
Booking	Base for booking records	getBookingType(), getTotalPrice(), getDetails()

Concrete Classes

Class	Description	Key Methods
Flight	Represents a flight	bookSeats(), cancelSeats(), getDestination()
Hotel	Represents a hotel	bookRooms(), cancelRooms(), getAmenities()
FlightBooking	A completed flight reservation	getFlightId(), getSeatClass(), getNumPassengers()
HotelBooking	A completed hotel reservation	getHotelId(), getCheckInDate(), getNumRooms()
User	User account	authenticate(), getUsername(), getEmail()
BookingSystem	Central controller	bookFlight(), bookHotel(), searchFlights(), searchHotels()

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Building the Project

Prerequisites

• C++ Compiler: g++ 10+ or MSVC 2019+ with C++17 support
• CMake: Version 3.15+ (for GUI version)
• Git: For cloning Nana library

Option 1: CMake Build (Recommended for GUI)

# Clone Nana library (if not already present)
git clone https://github.com/cnjinhao/nana.git lib/nana

# Create build directory
mkdir build && cd build

# Configure with CMake
cmake .. -G "MinGW Makefiles"    # Windows with MinGW
# OR
cmake .. -G "Visual Studio 17 2022"  # Windows with VS 2022
# OR  
cmake ..                          # Linux/Mac

# Build
cmake --build . --config Release

# Executables created:
#   - TravelBookingConsole.exe
#   - TravelBookingGUI.exe

Option 2: Make Build (Console Only)

make            # Build console version
make run        # Build and run
make clean      # Remove build files
make debug      # Build with debug symbols
make release    # Build with optimizations

Option 3: Direct Compilation (Console Only)

g++ -std=c++17 -Wall -Wextra -I include -o TravelBooking src/*.cpp

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Running the Application

GUI Version (Recommended)

# From build directory
./TravelBookingGUI.exe    # Windows
./TravelBookingGUI        # Linux

Console Version

./TravelBookingConsole.exe    # Windows
./TravelBookingConsole        # Linux

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📖 Usage Guide

Quick Start

1. Launch the application (GUI or Console)
2. Login with test account: johndoe / john123
3. Book a Flight: Search → Select → Enter details → Confirm
4. Book a Hotel: After flight booking, hotels at your destination are pre-filled!
5. View Bookings: Check your reservations anytime
6. Cancel if needed: Select booking → Cancel

GUI Navigation

Section	Description
Flights	Search by origin/destination, book with passenger details
Hotels	Search by city/stars, book with check-in/out dates
My Bookings	View all reservations, cancel if needed
Profile	View your account information
Login/Logout	Manage your session

Smart Feature: Flight → Hotel Recommendation

When you book a flight:

1. The destination city is saved
2. When you click "Hotels", the destination is auto-filled
3. Search results show hotels in your destination city first
4. One-click booking for complete trip planning!

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Test Data

Test Accounts

Username	Password	Description
admin	admin123	Administrator account
johndoe	john123	Regular user with sample bookings
janesmith	jane456	Regular user

Sample Flights

Flight	Route	Airline	Price
AA101	New York → Los Angeles	American Airlines	$299
UA202	Chicago → Miami	United Airlines	$249
DL303	San Francisco → Seattle	Delta Airlines	$179

Sample Hotels

Hotel	City	Stars	Price/Night
Grand Hilton	Los Angeles	⭐⭐⭐⭐⭐	$350
Marriott Downtown	New York	⭐⭐⭐⭐	$275
Holiday Inn Express	Chicago	⭐⭐⭐	$120

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Data File Formats

All data is stored in pipe-delimited text files in the data/ directory.

flights.txt

# Format: id|name|price|airline|origin|destination|departure|arrival|seats|flightNum
1|Flight to LAX|299.0|American Airlines|New York|Los Angeles|2026-02-15 08:00|2026-02-15 11:30|150|AA101

hotels.txt

# Format: id|name|price|location|city|stars|rooms|checkIn|checkOut|amenities
1|Grand Hilton|350.0|Downtown|Los Angeles|5|50|14:00|11:00|WiFi,Pool,Spa,Gym

users.txt

# Format: id|username|password|email|fullName|phone
1|johndoe|john123|john@email.com|John Doe|555-1234

bookings.txt

# Format: TYPE|bookingId|userId|date|price|...specific fields
FLIGHT|1|2|2026-01-21|299.0|1|2|Economy|John Doe
HOTEL|2|2|2026-01-21|700.0|1|2026-02-15|2026-02-17|1|2|John Doe

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GUI Styling (Premium Theme)

The GUI uses a custom dark theme with premium styling:

Color Palette

primary:     #2962FF  // Vibrant blue
accent:      #FFAB00  // Gold
background:  #121218  // Deep dark
surface:     #1C1C24  // Card surface
text:        #FFFFFF  // White text

Typography

• Title: Segoe UI Semibold, 28pt
• Heading: Segoe UI Semibold, 16pt
• Body: Segoe UI Regular, 11pt
• Button: Segoe UI Semibold, 11pt

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Technical Details

Memory Management

• Uses std::unique_ptr for automatic resource cleanup
• RAII pattern for file handles
• No raw new/delete calls

Thread Safety

• Single-threaded application
• File I/O is synchronous

Error Handling

• Input validation for all user input
• Graceful handling of missing data files
• Status messages provide user feedback

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Known Limitations

Limitation	Reason
Plain text passwords	Demo/educational purposes only
Simplified pricing	Hotels charge per booking, not per night
No date validation	Accepts any date format
Single user session	No session management

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Dependencies

Dependency	Version	Purpose
C++ Standard	C++17	Language standard
STL	-	Containers, algorithms, strings
Nana	Latest	GUI framework (optional for GUI version)
CMake	3.15+	Build system (optional)