string-processing-system [LUNGAYAN]

Program.cs

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

StringService.cs

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

StringView.cs

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+using System;
+using StringProcessingApp.Services;
+
+namespace StringProcessingApp.Views
+{
+    public class StringView
+    {
+        private StringService service = new StringService();
+        private bool isRunning = true;
+
+        public void Run()
+        {
+            while (isRunning)
+            {
+                DisplayMenu();
+                Console.Write("Choose an option: ");
+                string choice = Console.ReadLine();
+                Console.WriteLine();
+
+                switch (choice)
+                {
+                    case "1":
+                        Console.Write("Enter text: ");
+                        service.SetText(Console.ReadLine());
+                        break;
+
+                    case "2":
+                        Console.WriteLine("Current Text: " + service.GetText());
+                        break;
+
+                    case "3":
+                        Console.WriteLine("UPPERCASE: " + service.ToUpperCase());
+                        break;
+
+                    case "4":
+                        Console.WriteLine("lowercase: " + service.ToLowerCase());
+                        break;
+
+                    case "5":
+                        Console.WriteLine("Character Count: " + service.CountCharacters());
+                        break;
+
+                    case "6":
+                        Console.Write("Enter word to check: ");
+                        string word = Console.ReadLine();
+                        Console.WriteLine("Contains? " + service.ContainsWord(word));
+                        break;
+
+                    case "7":
+                        Console.Write("Word to replace: ");
+                        string oldWord = Console.ReadLine();
+                        Console.Write("New word: ");
+                        string newWord = Console.ReadLine();
+                        Console.WriteLine("Updated Text: " + service.ReplaceWord(oldWord, newWord));
+                        break;
+
+                    case "8":
+                        Console.Write("Start Index: ");
+                        int start = int.Parse(Console.ReadLine());
+                        Console.Write("Length: ");
+                        int length = int.Parse(Console.ReadLine());
+                        Console.WriteLine("Substring: " + service.ExtractSubstring(start, length));
+                        break;
+
+                    case "9":
+                        Console.WriteLine("Trimmed Text: " + service.TrimSpaces());
+                        break;
+
+                    case "10":
+                        service.ResetText();
+                        Console.WriteLine("Text reset to original.");
+                        break;
+
+                    case "11":
+                        isRunning = false;
+                        break;
+
+                    default:
+                        Console.WriteLine("Invalid option.");
+                        break;
+                }
+
+                Console.WriteLine();
+            }
+        }
+
+        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");
+            Console.WriteLine("======================================");
+        }
+    }
+}