private bool CheckRules(bool checkForWarnings, IEnumerable <ValueDescriptor> descriptors)
{
Debug.Assert(Values != null);
Debug.Assert(Issues != null);
Debug.Assert(descriptors != null);
// TODO: refactor this, it's not clear at all and there is too
// much almost duplicated code. Separate class?
int issueCount = 0;
foreach (var descriptor in descriptors)
{
if (checkForWarnings)
{
if (String.IsNullOrWhiteSpace(descriptor.WarningIfExpression))
{
continue;
}
bool hasWarning;
if (!_evaluator.Evaluate(() => descriptor.WarningIfExpression, out hasWarning))
{
continue;
}
if (!hasWarning)
{
continue;
}
}
else
{
if (String.IsNullOrWhiteSpace(descriptor.ValidIfExpression))
{
continue;
}
bool isValid;
if (!_evaluator.Evaluate(() => descriptor.ValidIfExpression, out isValid))
{
continue;
}
if (isValid)
{
continue;
}
}
DataSetValue item;
object itemValue = null;
if (Values.TryGetValue(descriptor.Reference, out item))
{
itemValue = item.Value;
}
// CHECK: message is not localized assuming that for every validation rule there will be
// a clear ad-hoc description (and this is just for debugging purposes). If it will be not the case
// then move this text to resources.
string message = checkForWarnings ? descriptor.WarningMessage : descriptor.ValidationMessage;
if (String.IsNullOrWhiteSpace(message))
{
message = $"Value '{itemValue}' for '{descriptor.Reference}' is not valid.";
}
if (checkForWarnings)
{
Issues.AddWarning(descriptor, message);
}
else
{
Issues.AddValidationError(descriptor, message);
}
++issueCount;
}
return(issueCount == 0);
}