public OperationResultSet <Book> GetAllBooksByAuthor(string authorName, string userName, string guid)
{
if (!CheckAuthenticated(userName, guid))
{
return(new OperationResultSet <Book>(Library.Models.OperationResult.ErrorEnum.NotAuthenticated,
"Please authenticate first!"));
}
if (String.IsNullOrEmpty(authorName))
{
return(new OperationResultSet <Book>(Library.Models.OperationResult.ErrorEnum.InvalidInputData, "Invalid or missing book author name"));
}
using (BookData dataProvider = new BookData())
{
try
{
Book[] result = dataProvider.GetAllBooksByAuthor(authorName);
if (result == null)
{
return(new OperationResultSet <Book>(new List <Book>()));
}
return(new OperationResultSet <Book>(new List <Book>(result)));
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("BookManagement : GetAllBooksByAuthor : " + ex.StackTrace);
return(new OperationResultSet <Book>(Library.Models.OperationResult.ErrorEnum.InternalProblem, "Some internal problem has occured"));
}
}
}