//----------------------------------------------
public static IStatusGeneric <BookWithEvents> CreateBook(string title, string description, DateTime publishedOn,
string publisher, decimal price, string imageUrl, ICollection <AuthorWithEvents> authors)
{
var status = new StatusGenericHandler <BookWithEvents>();
if (string.IsNullOrWhiteSpace(title))
{
status.AddError("The bookWithEvents title cannot be empty.");
}
var book = new BookWithEvents
{
BookId = Guid.NewGuid(),
Title = title,
Description = description,
PublishedOn = publishedOn,
Publisher = publisher,
ActualPrice = price,
OrgPrice = price,
ImageUrl = imageUrl,
//We need to initialise the AuthorsOrdered string when the entry is created
AuthorsOrdered = string.Join(", ", authors.Select(x => x.Name)),
//We don't need to initialise the ReviewsCount and the ReviewsAverageVotes as they default to zero
_reviews = new HashSet <ReviewWithEvents>() //We add an empty list on create. I allows reviews to be added when building test data
};
if (authors == null)
{
throw new ArgumentNullException(nameof(authors));
}
byte order = 0;
book._authorsLink = new HashSet <BookAuthorWithEvents>(authors.Select(a => new BookAuthorWithEvents(book, a, order++)));
if (!book._authorsLink.Any())
{
status.AddError("You must have at least one Author for a bookWithEvents.");
}
return(status.SetResult(book));
}
internal BookAuthorWithEvents(BookWithEvents bookWithEvents, AuthorWithEvents authorWithEvents, byte order)
{
Book = bookWithEvents;
Author = authorWithEvents;
Order = order;
}