/// <summary>
/// Returns true when the Step found a match
/// </summary>
public bool StepScan(EventPattern step, ScanLineArgs args)
{
var s = string.Empty;
var expression = step.RegularExpression;
if (step.Options.BodyStop && step.BodyStartFound)
{
expression = step.RegularExpressionBodyStop;
}
step.Found = step.IsRegularExpression ? RegularExpression.HasMatch(args.Line, expression) :
Common.GetStringFromLog(args.Line, step.RegularExpression, ref s);
if (step.Found)
{
Log.Write($" {step.Parent.Name}: Step {step.EventType}, \"{step.RegularExpression.Insert(1, "__")}\"", typeof(EventPattern).FullName, MethodBase.GetCurrentMethod().Name, LogEntryType.Debug);
// 'Prior' option requires that a exact EventPattern is found prior to this EventPattern
if (step.Options.Prior &&
LastFound != null)
{
var _priorStep = step.Parent.Events[step.Parent.Events.IndexOf(step) - step.Options.PriorIndex];
if ((!_priorStep.Found && _priorStep.EventTag == step.Options.PriorPattern) || _priorStep.EventTag != step.Options.PriorPattern)
{
Log.Write($"EventPattern found, however the expected Prior EventPattern should be '{step.Options.PriorPattern}' at Index {step.Options.PriorIndex}", typeof(EventPattern).FullName, MethodBase.GetCurrentMethod().Name, LogEntryType.Debug);
step.Found = false;
return(false);
}
}
// 'FirstRepeat' will only allow the first match to stay a match, any events that are found after are skipped
if (step.Options.FirstRepeat &&
LastFound != null &&
LastFound.Options.FirstRepeat &&
LastFound.EventTag == step.EventTag)
{
step.Found = false;
return(false);
}
if (step.Options.BodyStop)
{
if (step.BodyStartFound)
{
step.DateTimeBodyStop = RegularExpression.GetDateTime(EventService.GetDateTimeRegularExpression(args.SourceType), args.Line);
step.iLineBodyStop = args.iLine;
step.LineBodyStop = args.Line;
}
else
{
step.DateTime = RegularExpression.GetDateTime(EventService.GetDateTimeRegularExpression(args.SourceType), args.Line);
step.iLine = args.iLine;
step.Line = args.Line;
}
}
else
{
step.DateTime = RegularExpression.GetDateTime(EventService.GetDateTimeRegularExpression(args.SourceType), args.Line);
step.iLine = args.iLine;
step.Line = args.Line;
}
step.Found = true;
step.Match(step.Parent);
// Last Repeat
if (step.Options.LastRepeat &&
LastFound != null &&
LastFound.Options.LastRepeat &&
step.EventTag == LastFound.EventTag)
{
step.Parent.Events.Remove(LastFound);
LastFound = null;
}
// 'BodyStop' option represents a start and stop eventPattern.
if (step.Options.BodyStop)
{
if (!step.BodyStartFound)
{
step.BodyStartFound = true;
step.Found = false;
return(false);
}
step.BodyStopFound = true;
}
// When an EventPattern is found that can occur OneOrMore times
// Clone the EventPattern
// If Required or RequiredInOrder, remove these flags and make the next EventPattern Optional
if (step.Options.OneOrMore)
{
var index = step.Parent.Events.FindIndex(p => p.Identifier == step.Identifier);
var e = step.Clone(step.Parent);
e.NewIdentifier();
if (step.Options.Required || step.Options.RequiredInOrder)
{
e.Options.Required = false;
e.Options.RequiredInOrder = false;
e.Options.Optional = true;
}
step.Parent.Events.Insert(index + 1, e);
}
LastFound = step;
}
return(step.Found);
}
