public BookItem[] AssignedBooks( Valence.Request.Parameters param, ref string message )
{
var classOrgInfo = new Valence.OrgUnitInfo() {Id = param.ClassOrgId};
var result = new List<BookItem>();
result.AddRange( GetBooksForClass( param, classOrgInfo, ref message ) );
return result.ToArray();
}
public BookItem[] AssignedBooks(Valence.Request.Parameters param, ref string message)
{
var classOrgInfo = new Valence.OrgUnitInfo()
{
Id = param.ClassOrgId
};
var result = new List <BookItem>();
result.AddRange(GetBooksForClass(param, classOrgInfo, ref message));
return(result.ToArray());
}
private List <BookItem> GetBooksForClass(
Valence.Request.Parameters param,
Valence.OrgUnitInfo course,
ref string message)
{
Uri uri = param.UserContext.CreateAuthenticatedUri(
"/d2l/api/" + param.ApiVersion("le") + "/" + course.Id + "/content/isbn/", "GET");
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "GET";
var handler = new Valence.Request.ErrorHandler();
var result = new List <BookItem>();
Valence.Request.Perform(
request, param.UserContext,
delegate(string data) {
var serializer = new JavaScriptSerializer();
var books = serializer.Deserialize <Valence.Book[]>(data);
if ((books == null) || (books.Length <= 0))
{
return;
}
foreach (Valence.Book b in books)
{
try {
GoogleBook.Volume volume = GoogleBook.Api.Query(b.Isbn);
if (volume.TotalItems != 0)
{
GoogleBook.Item item = volume.items.First();
BookItem book = FromGoogleBookToBookItem(item);
result.Add(book);
}
} catch (ArgumentNullException) {}
}
},
handler.Process);
if (handler.IsError)
{
message = "Unable to retrieve assigned books. " + handler.Message;
}
return(result);
}
