/// <summary>
/// Mass rent media
/// </summary>
/// <param name="listMediaIds">List with media IDs that are being rented</param>
/// <param name="userId">The ID of the user who is the owner of the lendings</param>
/// <returns>Number of created entries</returns>
public int CreateLending(List<int> listMediaIds, int userId)
{
using (MediathekEntities context = new MediathekEntities())
{
int createCount = 0;
foreach (int mediaId in listMediaIds)
{
if (IsMediaAvailableForRenting(mediaId, userId))
{
MediaRenting mr = new MediaRenting();
mr.CheckOutDate = DateTime.Now;
mr.Media = context.MediaSet.FirstOrDefault(m => m.MediaId == mediaId);
mr.LeasingUser = context.Users.FirstOrDefault(u => u.UserId == userId);
// set the media state to "unavaiable"
mr.Media.MediaState = context.MediaStates.FirstOrDefault(ms => ms.MediaSateId == 2);
context.AddToMediaRentings(mr);
createCount++;
// if user had open reservation for the current media, we close the reservation
var res = from r in context.Reservations
where r.User.UserId == userId &&
r.Media.MediaId == mediaId &&
r.EndDate == null
select r;
foreach (Reservation reservation in res)
{
reservation.EndDate = DateTime.Now;
}
}
}
// save to DB
context.SaveChanges();
return createCount;
}
}