StringView.cs

using System;
using StringProcessingApp.Services;

namespace StringProcessingApp.Views
{
    class StringView
    {
        private StringService service = new StringService();

        public void Run()
        {
            bool running = true;

            while (running)
            {
                ShowMenu();
                Console.Write("Choose an option: ");
                int choice = Convert.ToInt32(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        Console.Write("Enter text: ");
                        string text = Console.ReadLine();
                        service.SetText(text);
                        break;

                    case 2:
                        Console.WriteLine("Current Text: " + service.GetText());
                        break;

                    case 3:
                        service.ToUpperCase();
                        Console.WriteLine("Converted to UPPERCASE");
                        break;

                    case 4:
                        service.ToLowerCase();
                        Console.WriteLine("Converted to lowercase");
                        break;

                    case 5:
                        Console.WriteLine("Character Count: " + service.CountCharacters());
                        break;

                    case 6:
                        Console.Write("Enter word to check: ");
                        string word = Console.ReadLine();
                        Console.WriteLine(service.ContainsWord(word)
                            ? "Word found"
                            : "Word not found");
                        break;

                    case 7:
                        Console.Write("Enter word to replace: ");
                        string oldWord = Console.ReadLine();
                        Console.Write("Enter new word: ");
                        string newWord = Console.ReadLine();
                        service.ReplaceWord(oldWord, newWord);
                        Console.WriteLine("Word replaced");
                        break;

                    case 8:
                        Console.Write("Enter start index: ");
                        int start = Convert.ToInt32(Console.ReadLine());
                        Console.Write("Enter length: ");
                        int length = Convert.ToInt32(Console.ReadLine());
                        service.ExtractSubstring(start, length);
                        Console.WriteLine("Substring extracted");
                        break;

                    case 9:
                        service.TrimSpaces();
                        Console.WriteLine("Spaces trimmed");
                        break;

                    case 10:
                        service.ResetText();
                        Console.WriteLine("Text reset to original");
                        break;

                    case 11:
                        running = false;
                        Console.WriteLine("Program exited");
                        break;

                    default:
                        Console.WriteLine("Invalid option");
                        break;
                }

                Console.WriteLine();
            }
        }

        private void ShowMenu()
        {
            Console.WriteLine("=== String Processing System ===");
            Console.WriteLine("1. Enter Text");
            Console.WriteLine("2. View Current Text");
            Console.WriteLine("3. Convert to UPPERCASE");
            Console.WriteLine("4. Convert to lowercase");
            Console.WriteLine("5. Count Characters");
            Console.WriteLine("6. Check if Contains Word");
            Console.WriteLine("7. Replace Word");
            Console.WriteLine("8. Extract Substring");
            Console.WriteLine("9. Trim Spaces");
            Console.WriteLine("10. Reset Text");
            Console.WriteLine("11. Exit");
        }
    }
}