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string-processing-system [MONTANO] #21

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7a09e04
Create Program.cs
dmMontano Feb 28, 2026
29849b3
Create StringService.cs
dmMontano Feb 28, 2026
28868f1
Create StringView.cs
dmMontano Feb 28, 2026
eea56a2
Delete Services/StringService.cs
dmMontano Feb 28, 2026
43a1a59
Delete Views/StringView.cs
dmMontano Feb 28, 2026
2ea3d9d
Delete Program.cs
dmMontano Feb 28, 2026
071dc02
Create StringView.cs
dmMontano Feb 28, 2026
2812860
Create StringService.cs
dmMontano Feb 28, 2026
f8bc2b7
Create Program.cs
dmMontano Feb 28, 2026
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13 changes: 13 additions & 0 deletions StringProcessingApp/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
{
internal class Program
{
static void Main(string[] args)
{
StringView view = new StringView();
view.Run();
}
}
}
61 changes: 61 additions & 0 deletions StringProcessingApp/Services/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 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 string ExtractSubstring(int startIndex, int length)
{
return _currentText.Substring(startIndex, length);
}

public void TrimSpaces()
{
_currentText = _currentText.Trim();
}

public void Reset()
{
_currentText = _originalText;
}
}
}
143 changes: 143 additions & 0 deletions StringProcessingApp/Views/StringView.cs
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using System;
using StringProcessingApp.Services;

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

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

public void Run()
{
bool running = true;

while (running)
{
ShowMenu();
Console.Write("Select an option: ");
string choice = Console.ReadLine();

Console.WriteLine();

switch (choice)
{
case "1":
EnterText();
break;
case "2":
ViewCurrentText();
break;
case "3":
_service.ToUpperCase();
Console.WriteLine("Converted to UPPERCASE.");
break;
case "4":
_service.ToLowerCase();
Console.WriteLine("Converted to lowercase.");
break;
case "5":
Console.WriteLine($"Character Count: {_service.CountCharacters()}");
break;
case "6":
CheckContains();
break;
case "7":
ReplaceWord();
break;
case "8":
ExtractSubstring();
break;
case "9":
_service.TrimSpaces();
Console.WriteLine("Spaces trimmed.");
break;
case "10":
_service.Reset();
Console.WriteLine("Text reset to original.");
break;
case "11":
running = false;
Console.WriteLine("Thank you for using the app, bye!");
break;
default:
Console.WriteLine("Invalid choice. Please try again.");
break;
}

Console.WriteLine();
}
}

private void ShowMenu()
{
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()
{
Console.WriteLine($"Current Text: {_service.GetText()}");
}

private void CheckContains()
{
Console.Write("Enter word to check: ");
string word = Console.ReadLine();

bool result = _service.ContainsWord(word);

if (result)
Console.WriteLine("The text contains the word.");
else
Console.WriteLine("The text does NOT contain the word.");
}

private void ReplaceWord()
{
Console.Write("Enter word to replace: ");
string oldWord = Console.ReadLine();

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

_service.ReplaceWord(oldWord, newWord);
Console.WriteLine("Word replaced successfully.");
}

private void ExtractSubstring()
{
Console.Write("Enter start index: ");
int start = int.Parse(Console.ReadLine());

Console.Write("Enter length: ");
int length = int.Parse(Console.ReadLine());

string result = _service.ExtractSubstring(start, length);
Console.WriteLine($"Extracted Substring: {result}");
}
}
}