/// <summary>
/// This method is used to verify the attributes of the xml file’s root element.
/// </summary>
/// <returns>If any of the validation described fails, return a value of false </returns>
private bool processHeader()
{
//Define an XDocument object and populate this object with the contents of the current file (fileName)
xDocDetails = XDocument.Load(fileName);
//Define an XElement object and populate this object with the data found within the transfer element of the xml file
XElement xeleElement = xDocDetails.Element("transfer");
try
{
//The XElement object must have 4 attributes
if (xeleElement.Attributes().Count() != 4)
{
var ex = new Exception("The XElement object must have 4 attributes");
throw ex;
}
//Attribute
XAttribute dateAttribute = xeleElement.Attribute("date");
//The date attribute of the XElement object must be equal to today’s date
if (!dateAttribute.Value.Equals(System.DateTime.Today.ToString("yyyy-MM-dd")))
{
var ex = new Exception("The date attribute of the XElement object must be equal to today’s date");
throw ex;
}
XAttribute toAttribute = xeleElement.Attribute("to");
//The to attribute must match the Bank of BIT institution number
if (!toAttribute.Value.Equals(BusinessRules.BankNumber().ToString()))
{
var ex = new Exception("The to attribute must match the Bank of BIT institution number ");
throw ex;
}
XAttribute fromAttribute = xeleElement.Attribute("from");
int ifromAttribute = 0;
if (fromAttribute != null)
{
ifromAttribute = int.Parse(fromAttribute.Value);
}
//retrive data form institution table
List <int> institutionNumbers = db.Institutions.Where(d => d.InstitutionNumber == ifromAttribute).Select(d => d.InstitutionNumber).ToList();
//The from attribute must match one of the institution number values within the Institution Entity class
if (institutionNumbers.Count == 0)
{
var ex = new Exception("The from attribute must match one of the institution number values within the Institution Entity class");
throw ex;
}
XAttribute checksumAttribute = xeleElement.Attribute("checksum");
int iChecksum = 0;
IEnumerable <XElement> accountNoElements =
xDocDetails.Descendants().Where(d => d.Name == "account_no");
foreach (XElement xele in accountNoElements)
{
iChecksum += int.Parse(xele.Value);
}
//The checksum attribute must match the sum of all account_no elements in the file
if (int.Parse(checksumAttribute.Value) != iChecksum)
{
var ex = new Exception("The checksum attribute must match the sum of all account_no elements in the file ");
throw ex;
}
return(true);
}
catch (Exception ex)
{
logData += "\nError occor cause: " + ex.Message;
return(false);
}
}