From 8635208ab1600926f252f592e88498ffd5490786 Mon Sep 17 00:00:00 2001
From: Kenjay Lungayan <kenjaylungayan@gmail.com>
Date: Sun, 1 Mar 2026 00:09:26 +0800
Subject: [PATCH] Add files via upload

---
 Program.cs       |  13 ++++++
 StringService.cs |  65 +++++++++++++++++++++++++++++
 StringView.cs    | 104 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 182 insertions(+)
 create mode 100644 Program.cs
 create mode 100644 StringService.cs
 create mode 100644 StringView.cs

diff --git a/Program.cs b/Program.cs
new file mode 100644
index 0000000..6594209
--- /dev/null
+++ b/Program.cs
@@ -0,0 +1,13 @@
+using StringProcessingApp.Views;
+
+namespace StringProcessingApp
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            StringView view = new StringView();
+            view.Run();
+        }
+    }
+}
\ No newline at end of file
diff --git a/StringService.cs b/StringService.cs
new file mode 100644
index 0000000..482e265
--- /dev/null
+++ b/StringService.cs
@@ -0,0 +1,65 @@
+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;
+        }
+    }
+}
\ No newline at end of file
diff --git a/StringView.cs b/StringView.cs
new file mode 100644
index 0000000..7d5926d
--- /dev/null
+++ b/StringView.cs
@@ -0,0 +1,104 @@
+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("======================================");
+        }
+    }
+}
\ No newline at end of file