public void LendBook(ObjectId userId, ObjectId bookId, DateTime startDateUtc, DateTime endDateUtc)
{
// Check if dates are logical.
if (startDateUtc > endDateUtc)
{
return;
}
// Check if lending time is not exceeding maximum.
var lendTime = endDateUtc.Subtract(startDateUtc);
if (lendTime.TotalDays > _maximumLendingTimeInDays)
{
return;
}
// Check if book exists.
if (_database.FindOneById <Book>(Book.CollectionName, bookId) == null)
{
return;
}
// Check if book is currently lent out.
if (GetCurrentLendingBook(bookId) != null)
{
return;
}
// Create a new lending.
var lending = new Lending(userId, bookId, startDateUtc, endDateUtc);
_database.Create(lending, Lending.CollectionName);
}
// TODO: return position.
public void CreateReservation(ObjectId userId, ObjectId bookId)
{
// Check if book exists.
if (_database.FindOneById <Book>(Book.CollectionName, bookId) == null)
{
return;
}
// Check for active lending.
var lending = _lendService.GetCurrentLendingBook(bookId);
if (lending == null)
{
// Book can be lend, so no need to create reservation.
// TODO: Maybe return useful message?
return;
}
var reservation = new Reservation(userId, bookId, DateTime.UtcNow);
_database.Create(reservation, Reservation.CollectionName);
}
public bool Register(UserRegistrationModel model)
{
var filterBuilder = Builders <User> .Filter;
var filter = filterBuilder.Eq(x => x.UserName, model.Username)
| filterBuilder.Eq(x => x.Email, model.Email);
var duplicateEntity = _database.FindOneByFilter(User.CollectionName, filter);
// TODO: Return message that there is a duplicate and which one is duplicate.
if (duplicateEntity != null)
{
return(false);
}
string plainPassword = model.Password;
string hashedPassword = HashHelp.GetSha512Hash(plainPassword);
var user = new User(model.Username, hashedPassword, model.Email);
_database.Create(user, User.CollectionName);
return(true);
}
public void Create(string title, string author)
{
var book = new Book(title, author);
_database.Create(book, Book.CollectionName);
}