public void ReturnBook(HardCopy copy)
{
var history = new BookLeaningHistory
{
HardCopyId = copy.Id,
UserLeantTo = copy.UserLeantTo.Value,
LeantDate = copy.LeantDate.Value,
ReturnedDate = DateTime.Now
};
_libraryContext.BookLeaningHistories.InsertOnSubmit(history);
_libraryContext.SubmitChanges();
}
// Borrow (return string with message (user + item) if it's working)
public Respone <string> Return(HardCopy data)
{
Respone <string> feedback;
// find user id in borrowed items
HardCopy tempdata;
if (!_borrowedHardCopies.TryGetValue(data.CopyId, out tempdata))
{
feedback = new Respone <string>();
feedback.IsWorking = false;
feedback.Message = "Missing or invalid data";
feedback.WrongDataType = WrongData.CopyId;
return(feedback);
}
else
{
data.BorrowerId = tempdata.BorrowerId;
}
User user;
AbstractItem item;
feedback = CheckAndSearchItemAndUser(data, out user, out item);
if (!feedback.IsWorking)
{
return(feedback);
}
else
{
Respone <HardCopy> tempFeedback = BorrowReturnOperations <HardCopy> .Return(data, item, user);
if (!tempFeedback.IsWorking)
{
feedback.IsWorking = false;
feedback.Message = tempFeedback.Message;
}
else
{
// remove hard-copy data from borrowed-dictionary
_borrowedHardCopies.Remove(tempFeedback.Data.CopyId);
feedback.Data = tempFeedback.Message;
}
return(feedback);
}
}
// Get input from text-boxes
private void GetInput()
{
_input = new HardCopy();
int temp;
if (int.TryParse(userIdTbx.Text, out temp))
{
_input.BorrowerId = temp;
}
if (int.TryParse(itemIdTbx.Text, out temp))
{
_input.ItemId = temp;
}
Guid tempGuid;
if (Guid.TryParse(copyIdTbx.Text, out tempGuid))
{
_input.CopyId = tempGuid;
}
}
// Borrow (return string with message (user + item) if it's working)
public Respone <string> Borrow(HardCopy data)
{
User user;
AbstractItem item;
Respone <string> feedback = CheckAndSearchItemAndUser(data, out user, out item);
if (!feedback.IsWorking)
{
return(feedback);
}
else
{
Respone <HardCopy> tempFeedback = BorrowReturnOperations <HardCopy> .Borrow(data, item, user);
if (!tempFeedback.IsWorking)
{
feedback.IsWorking = false;
feedback.Message = tempFeedback.Message;
}
else
{
// add hard-copy data to borrowed-dictionary
if (_borrowedHardCopies.ContainsKey(tempFeedback.Data.CopyId))
{
_borrowedHardCopies[tempFeedback.Data.CopyId] = tempFeedback.Data;
}
else
{
_borrowedHardCopies.Add(tempFeedback.Data.CopyId, tempFeedback.Data);
}
feedback.Data = tempFeedback.Message;
}
return(feedback);
}
}
// check data and search item and user
private Respone <string> CheckAndSearchItemAndUser(HardCopy data, out User user, out AbstractItem item)
{
Respone <string> feedback = new Respone <string>();
user = null;
item = null;
// check if current user can do it (reader can't borrow by himself)
if (_users.CurrentUser != null && _users.CurrentUser.Access == UserType.Reader)
{
feedback.IsWorking = false;
feedback.Message = "For borrow or return item, please ask librarian for help";
feedback.WrongDataType = WrongData.UserType;
return(feedback);
}
// check if all data exist in input
if (data.ItemId == null || data.CopyId == null || data.BorrowerId == null)
{
feedback.IsWorking = false;
feedback.Message = "Missing or invalid data";
if (data.ItemId == null)
{
feedback.WrongDataType = WrongData.ItemId;
}
else if (data.CopyId == null)
{
feedback.WrongDataType = WrongData.CopyId;
}
else
{
feedback.WrongDataType = WrongData.UserId;
}
return(feedback);
}
// try find item and user
user = _users.GetUser(data.BorrowerId);
if (user == null || !_itemsById.TryGetValue(data.ItemId, out item))
{
feedback.IsWorking = false;
if (user == null)
{
feedback.Message = "User not found";
feedback.WrongDataType = WrongData.UserId;
}
else
{
feedback.Message = "Item not found";
feedback.WrongDataType = WrongData.ItemId;
}
return(feedback);
}
else
{
feedback.IsWorking = true;
return(feedback);
}
}
