DevOne.Utils.ErrorHandling 1.0.0

ErrorHandling

Usage

• ErrorHandler with value as string

string name = "marcos test";

using (var eh = new ErrorHandler())
{
    switch (name.Length)
    {
        case < 3:
            eh.Add(new(nameof(name), "name length must be greater than 2"));
            break;
        case > 25:
            eh.Add(new(nameof(name), "name length must be less than 26"));
            break;
        default:
            break;
    }

    var regex = new Regex(@"^[a-z0-9]+$");

    if (!regex.IsMatch(name))
    {
        eh.Add(new(nameof(name), "name format is invalid"));
    }
}

when the program get out of the using scope, if exists some error an exception of type new ErrorHandlerException<Error<string>> will throws.

if you want to verify errors in a specific part of your code, you can avoid using and use like that:

string name = "marcos test";

var eh = new ErrorHandler();

switch (name.Length)
{
    case < 3:
        eh.Add(new(nameof(name), "name length must be greater than 2"));
        break;
    case > 25:
        eh.Add(new(nameof(name), "name length must be less than 26"));
        break;
    default:
        break;
}

var regex = new Regex(@"^[a-z0-9]+$");

if (!regex.IsMatch(name))
{
    eh.Add(new(nameof(name), "name format is invalid"));
}

...

eh.Dispose(); // verify the errors

if you want a diferent error value type use can do this like that:

• create a custom error value

record CustomErrorValue(string Message, string Id, string Location);

• use this error value on error handler instance

using (var eh = new ErrorHandler<CustomErrorValue>())

• and now you need pass this type as the value

eh.Add(new("my key", new CustomErrorValue("message", "id", "location")));

you can catch any exceptions from error handler like that:

try {
    ...
}
catch (ErrorHandlerBaseException exception)
{
    Console.WriteLine(exception.Message);

    foreach (var error in exception.Errors)
    {
        Console.WriteLine(error);
    }
}

this way will catch any type of exception that the ErrorHandler throws if you want to catch a specific exception type you can:

try {
    ...
}
catch (ErrorHandlerBaseException<Error<string>> exception)
{
    Console.WriteLine(exception.Message);

    foreach (var error in exception.Errors)
    {
        Console.WriteLine($"{error.Key}: {error.Value}"); // you have intellisense
    }
}