/// <summary>
/// This method is used to check whether a string meets certain validation rules. It can also autofix it and report it to the user.
/// </summary>
/// <param name="target">The string to check</param>
/// <param name="scope">The context that describes the target (i.e Name)</param>
/// <param name="allowDigits">Whether the string is allowed to contain numbers</param>
/// <param name="allowEmpty">Whether the string can be empty</param>
/// <param name="max">The maximum number of characteers.Including whitespace.</param>
/// <param name="min">The minimum number of characteers.Including whitespace.</param>
/// <param name="autoFix">If true , automatically fix the string (remove digits , remove character over the max limit)</param>
/// <param name="fixTarget">The holder of the target.</param>
/// <param name="autoNotify">Whether the method should display the errors found to the user. See ValidatorResponse.NotifyUser()</param>
/// <param name="fileName">Whether the method should check if the string is a valid file path </param>
/// <returns></returns>
public static ValidatorResponse isStringValid(
string target, string scope, bool allowDigits, bool allowEmpty, int max = int.MaxValue,
int min = int.MinValue, bool autoFix = false, TextBox fixTarget = null, bool autoNotify = false, bool fileName = false)
{
var errors = new List <string>();
if (target.Length > max)
{
errors.Add("The " + scope + " should be less than " + max + " characters.");
}
if (target.Length < min)
{
errors.Add("The " + scope + " should be more than " + max + " characters.");
}
if (!allowDigits)
{
if (target.ToCharArray().Any(char.IsDigit))
{
errors.Add("The " + scope + " should not contain any numbers");
}
}
if (!allowEmpty)
{
if (target == "")
{
errors.Add("The " + scope + " can't be empty");
}
}
if (fileName)
{
errors.AddRange(from char c in target
from k in System.IO.Path.GetInvalidFileNameChars()
where c == k select
"Character " + c + " is invalid.");
}
var response = new ValidatorResponse {
isValid = (errors.Count == 0), Errors = errors
};
if (autoNotify)
{
response.NotifyUser();
}
if (autoFix && fixTarget != null)
{
if (target.Length > max)
{
fixTarget.Text = fixTarget.Text.Substring(0, max);
}
if (!allowDigits)
{
if (target.ToCharArray().Any(char.IsDigit))
{
fixTarget.Text = new string(target.ToCharArray().Where(x => !char.IsDigit(x)).ToArray());
}
}
// if (!allowEmpty) fixTarget.Text = "Enter a "+scope;
}
return(response);
}