/// <summary>
/// Passwords generator using the specified regular expression.
/// </summary>
/// <param name="token">CancellationToken to stop string generation.</param>
private async Task GenerateStrings(CancellationToken token)
{
List <string> matches = new List <string>();
BusyStateManager.EnterBusy();
BusyStateManager.SetMessage(SeverityType.Info, "Generating strings that match the specified RegEx.");
await Task.Run(() =>
{
int count = 0;
string match = null;
/* Set regular expression and add matches to collection. */
if (_regExService.SetRegEx(RegEx))
{
while (!token.IsCancellationRequested &&
count++ < MaxRows &&
(match = _regExService.GetNext()) != null)
{
matches.Add(match);
}
}
});
RegExMatches = new ObservableCollection <string>(matches);
BusyStateManager.SetMessage(SeverityType.None);
BusyStateManager.ExitBusy();
}
/// <summary>
/// The GetFirst method returns the first string that meets the regular expression.
/// Returns null if no string meets the regular expression.
/// </summary>
/// <remarks>
/// The GetFirst method rewinds the RegEx generator.
/// </remarks>
public string GetFirst()
{
string match = null;
Count = 0;
if (_regExService.SetRegEx(RegEx))
{
match = _regExService.GetNext();
}
if (match != null)
{
Count++;
}
return(match);
}