/// <summary>
/// method
/// US:902
/// validates the syntax and placeholders for the expression passed in
/// </summary>
/// <param name="exp"></param>
/// <returns></returns>
public CStatus Validate(CExpression exp)
{
CStatus status = ValidateSyntax(exp);
if (!status.Status)
{
return(status);
}
status = ValidatePlaceHolders(exp.GetIf());
if (!status.Status)
{
return(status);
}
status = ValidateActions(exp.GetThen());
if (!status.Status)
{
return(status);
}
string strElse = exp.GetElse();
if (!string.IsNullOrEmpty(strElse))
{
status = ValidateActions(exp.GetElse());
if (!status.Status)
{
return(status);
}
}
return(status);
}
/// <summary>
/// method
/// US:902
/// validates the syntax for the expression passed in
/// </summary>
/// <param name="strExp"></param>
/// <returns></returns>
private CStatus ValidateSyntax(CExpression Exp)
{
string strExp = Exp.Expression;
if (string.IsNullOrEmpty(strExp))
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_NULL));
}
// if the if token is not at the beginning
int nIfIndex = strExp.IndexOf(CExpression.IfTkn);
if (nIfIndex != 0)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_IF));
}
// if there are two if tokens
int nIfCount = strExp.Split(new string[] { CExpression.IfTkn }, StringSplitOptions.None).Count() - 1;
if (nIfCount > 1)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_IF_DOUBLE));
}
// if the then token does not exist
int nThenIndex = strExp.IndexOf(CExpression.ThenTkn);
if (nThenIndex < 0)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_THEN));
}
// if there are two then tokens
int nThenCount = strExp.Split(new string[] { CExpression.ThenTkn }, StringSplitOptions.None).Count() - 1;
if (nThenCount > 1)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_THEN_DOUBLE));
}
if (string.IsNullOrEmpty(Exp.GetIf()))
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_IF_EMPTY));
}
// if the expression end token is not at the end
int nExpEndIndex = strExp.IndexOf(CExpression.EndTkn);
if (nExpEndIndex != strExp.Length - 1)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_SEMI));
}
// if there are two end tokens
int nEndCount = strExp.Split(new char[] { CExpression.EndTkn }, StringSplitOptions.None).Count() - 1;
if (nEndCount > 1)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_SEMI_DOUBLE));
}
if (string.IsNullOrEmpty(Exp.GetThen()))
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_THEN_EMPTY));
}
// the else token is not required
// if the else token exists
int nElseIndex = strExp.IndexOf(CExpression.ElseTkn);
if (nElseIndex >= 0)
{
// if there are two else tokens
int nElseCount = strExp.Split(new string[] { CExpression.ElseTkn }, StringSplitOptions.None).Count() - 1;
if (nElseCount > 1)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_ELSE_DOUBLE));
}
// if the else token is before the then token
if (nElseIndex < nThenIndex)
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_IF_ELSE_THEN));
}
if (string.IsNullOrEmpty(Exp.GetElse()))
{
return(new CStatus(false, k_STATUS_CODE.Failed, LogicModuleMessages.ERROR_VALIDATE_ELSE_EMPTY));
}
}
return(new CStatus(true, k_STATUS_CODE.Success, LogicModuleMessages.SUCCESS_VALIDATE));
}