StringView.cs

using System;
using StringProcessingApp.Services;

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

        public void Start()
        {
            int choice = 0;

            while (choice != 11)
            {
                Console.WriteLine("\n--- 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");
                Console.Write("Choose: ");

                choice = Convert.ToInt32(Console.ReadLine());

                if (choice == 1)
                {
                    Console.Write("Enter text: ");
                    string text = Console.ReadLine();
                    service.EnterText(text);
                }
                else if (choice == 2)
                {
                    Console.WriteLine("Current Text: " + service.GetText());
                }
                else if (choice == 3)
                {
                    service.MakeUpper();
                    Console.WriteLine("Converted to UPPERCASE.");
                }
                else if (choice == 4)
                {
                    service.MakeLower();
                    Console.WriteLine("Converted to lowercase.");
                }
                else if (choice == 5)
                {
                    Console.WriteLine("Length: " + service.GetLength());
                }
                else if (choice == 6)
                {
                    Console.Write("Enter word to check: ");
                    string word = Console.ReadLine();

                    if (service.CheckContains(word))
                        Console.WriteLine("Word found!");
                    else
                        Console.WriteLine("Word not found.");
                }
                else if (choice == 7)
                {
                    Console.Write("Word to replace: ");
                    string oldWord = Console.ReadLine();

                    Console.Write("New word: ");
                    string newWord = Console.ReadLine();

                    service.ReplaceWord(oldWord, newWord);
                    Console.WriteLine("Replaced successfully.");
                }
                else if (choice == 8)
                {
                    Console.Write("Start index: ");
                    int start = Convert.ToInt32(Console.ReadLine());

                    Console.Write("Length: ");
                    int length = Convert.ToInt32(Console.ReadLine());

                    service.GetSubstring(start, length);
                    Console.WriteLine("Substring extracted.");
                }
                else if (choice == 9)
                {
                    service.TrimText();
                    Console.WriteLine("Spaces removed.");
                }
                else if (choice == 10)
                {
                    service.Reset();
                    Console.WriteLine("Text reset.");
                }
                else if (choice == 11)
                {
                    Console.WriteLine("Goodbye!");
                }
                else
                {
                    Console.WriteLine("Invalid choice.");
                }
            }
        }
    }
}