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string-processing-system [SUBA-AN] #38

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c56a0c6
Program.cs
Kurtdio Mar 7, 2026
ec0f4bb
StringService.cs
Kurtdio Mar 7, 2026
669e7e3
StringView.cs
Kurtdio Mar 7, 2026
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13 changes: 13 additions & 0 deletions Program.cs
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Original file line number Diff line number Diff line change
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using StringProcessingApp.Views;

namespace StringProcessingApp
{
class Program
{
static void Main(string[] args)
{
StringView view = new StringView();
view.Run();
}
}
}
85 changes: 85 additions & 0 deletions StringService.cs
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using System;

namespace StringProcessingApp.Services
{
public class StringService
{
private string _originalText;
private string _currentText;

public StringService()
{
_originalText = "";
_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)
{
if (startIndex < 0 || startIndex >= _currentText.Length || length < 0)
return "Invalid indices";
if (startIndex + length > _currentText.Length)
length = _currentText.Length - startIndex;
return _currentText.Substring(startIndex, length);
}


public string TrimSpaces()
{
_currentText = _currentText.Trim();
return _currentText;
}


public void ResetText()
{
_currentText = _originalText;
}
}
}
140 changes: 140 additions & 0 deletions StringView.cs
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using System;
using StringProcessingApp.Services;

namespace StringProcessingApp.Views
{
public class StringView
{
private StringService _service;

public StringView()
{
_service = new StringService();
}

public void Run()
{
bool exit = false;
while (!exit)
{
DisplayMenu();
Console.Write("Choose an option: ");
string input = Console.ReadLine();
Console.WriteLine();

switch (input)
{
case "1":
EnterText();
break;
case "2":
ViewCurrentText();
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":
CheckContainsWord();
break;
case "7":
ReplaceWord();
break;
case "8":
ExtractSubstring();
break;
case "9":
Console.WriteLine("Trimmed text: " + _service.TrimSpaces());
break;
case "10":
_service.ResetText();
Console.WriteLine("Text reset to original.");
break;
case "11":
exit = true;
Console.WriteLine("Exiting...");
break;
default:
Console.WriteLine("Invalid option. Try again.");
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("================================");
}

private void EnterText()
{
Console.Write("Enter your text: ");
string text = Console.ReadLine();
_service.SetText(text);
Console.WriteLine("Text saved successfully.");
}

private void ViewCurrentText()
{
string text = _service.GetText();
Console.WriteLine("Current Text: " + (string.IsNullOrEmpty(text) ? "[Empty]" : text));
}

private void CheckContainsWord()
{
Console.Write("Enter word to check: ");
string word = Console.ReadLine();
bool exists = _service.ContainsWord(word);
Console.WriteLine(exists ? $"Text contains '{word}'." : $"Text does not contain '{word}'.");
}

private void ReplaceWord()
{
Console.Write("Enter word to replace: ");
string oldWord = Console.ReadLine();
Console.Write("Enter new word: ");
string newWord = Console.ReadLine();
string result = _service.ReplaceWord(oldWord, newWord);
Console.WriteLine("Updated Text: " + result);
}

private void ExtractSubstring()
{
Console.Write("Enter start index: ");
if (!int.TryParse(Console.ReadLine(), out int start))
{
Console.WriteLine("Invalid input.");
return;
}

Console.Write("Enter length: ");
if (!int.TryParse(Console.ReadLine(), out int length))
{
Console.WriteLine("Invalid input.");
return;
}

string substring = _service.ExtractSubstring(start, length);
Console.WriteLine("Substring: " + substring);
}
}
}