string-processing-system [GALUA]

Program.cs

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+using StringProcessingApp.Views;
+
+namespace StringProcessingApp
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            StringView view = new StringView();
+            view.Run();
+        }
+    }
+}

Services/StringService.cs

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+using System;
+
+namespace StringProcessingApp.Services
+{
+    public class StringService
+    {
+        private string currentText = "";
+        private string originalText = "";
+
+        public void EnterText(string text)
+        {
+            currentText = text;
+            originalText = text;
+        }
+
+        public string GetCurrentText()
+        {
+            return currentText;
+        }
+
+        public void ToUpperCase()
+        {
+            currentText = currentText.ToUpper();
+        }
+
+        public void ToLowerCase()
+        {
+            currentText = currentText.ToLower();
+        }
+
+        public int CountCharacters()
+        {
+            return currentText.Length;
+        }
+
+        public bool ContainsWord(string word)
+        {
+            return currentText.Contains(word);
+        }
+
+        public void ReplaceWord(string oldWord, string newWord)
+        {
+            currentText = currentText.Replace(oldWord, newWord);
+        }
+
+        public void ExtractSubstring(int start, int length)
+        {
+            if (start >= 0 && start < currentText.Length)
+                currentText = currentText.Substring(start, length);
+        }
+
+        public void TrimSpaces()
+        {
+            currentText = currentText.Trim();
+        }
+
+        public void ResetText()
+        {
+            currentText = originalText;
+        }
+    }
+}

Views/StringView.cs

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+using System;
+using StringProcessingApp.Services;
+
+namespace StringProcessingApp.Views
+{
+    public class StringView
+    {
+        private StringService service = new StringService();
+
+        public void Run()
+        {
+            int choice;
+
+            do
+            {
+                DisplayMenu();
+                Console.Write("Choose option: ");
+                choice = Convert.ToInt32(Console.ReadLine());
+
+                switch (choice)
+                {
+                    case 1:
+                        Console.Write("Enter text: ");
+                        service.EnterText(Console.ReadLine());
+                        break;
+
+                    case 2:
+                        Console.WriteLine("Current Text: " + service.GetCurrentText());
+                        break;
+
+                    case 3:
+                        service.ToUpperCase();
+                        break;
+
+                    case 4:
+                        service.ToLowerCase();
+                        break;
+
+                    case 5:
+                        Console.WriteLine("Character Count: " + service.CountCharacters());
+                        break;
+
+                    case 6:
+                        Console.Write("Enter word: ");
+                        Console.WriteLine(service.ContainsWord(Console.ReadLine()) ? "Found." : "Not Found.");
+                        break;
+
+                    case 7:
+                        Console.Write("Old word: ");
+                        string oldWord = Console.ReadLine();
+                        Console.Write("New word: ");
+                        string newWord = Console.ReadLine();
+                        service.ReplaceWord(oldWord, newWord);
+                        break;
+
+                    case 8:
+                        Console.Write("Start index: ");
+                        int start = Convert.ToInt32(Console.ReadLine());
+                        Console.Write("Length: ");
+                        int length = Convert.ToInt32(Console.ReadLine());
+                        service.ExtractSubstring(start, length);
+                        break;
+
+                    case 9:
+                        service.TrimSpaces();
+                        break;
+
+                    case 10:
+                        service.ResetText();
+                        break;
+
+                    case 11:
+                        Console.WriteLine("Goodbye!");
+                        break;
+                }
+
+                Console.WriteLine();
+
+            } while (choice != 11);
+        }
+
+        private void DisplayMenu()
+        {
+            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");
+        }
+    }
+}