Upgrade application from console to web application

[Copilot]

This PR successfully converts the console application to a modern web application using ASP.NET Core while preserving all existing functionality.

Changes Made

Project Configuration

• Updated BusinessApp.csproj from Microsoft.NET.Sdk to Microsoft.NET.Sdk.Web
• Upgraded target framework from .NET 7.0 to .NET 8.0 for better compatibility
• Added .gitignore to exclude build artifacts

Architecture Transformation

• Program.cs: Replaced console menu loop with ASP.NET Core web host configuration
• Service Layer: Created clean service interfaces and implementations:
  • IStringService / StringService - String operations (reverse, remove whitespace)
  • IPatternService / PatternService - Pattern generation (letters, stars, palindrome check)
  • IMathService / MathService - Mathematical operations (circle area, prime check)

Web Controllers

• HomeController: Serves HTML views for each operation
• StringController: REST API endpoints for string operations
• PatternController: REST API endpoints for pattern generation
• MathController: REST API endpoints for mathematical calculations

User Interface

• Responsive Web Design: Clean, modern UI with navigation menu
• Individual Pages: Dedicated pages for each operation with interactive forms
• Real-time Processing: JavaScript calls to REST APIs for immediate results
• Input Validation: Client-side validation with user-friendly error messages

Features Preserved

All original console features are now accessible via web interface:

1. Reverse String - Reverses input text characters
2. Remove Whitespace - Removes all spaces from input
3. Letter Pattern - Generates diamond patterns using letters
4. Star Pattern - Creates diamond patterns using stars
5. Circle Area - Calculates area from radius input
6. Prime Check - Determines if a number is prime

Usage Instructions

cd BusinessApp
dotnet run

Then navigate to http://localhost:5000 in your web browser.

API Endpoints

For programmatic access:

• POST /api/string/reverse - Reverse string
• POST /api/string/remove-whitespace - Remove whitespace
• POST /api/pattern/letter - Generate letter patterns
• POST /api/pattern/star - Generate star patterns
• POST /api/math/circle-area - Calculate circle area
• POST /api/math/prime-check - Check prime numbers

Testing

All features have been tested and verified working in both web UI and API modes. The application maintains the same business logic while providing a modern web interface.

Fixes #10.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.