public static Respone <AbstractItem> TryEdit(AbstractItem item, string title, string publisher, string annotation, string placeInLib, string year, string editionOrIssue, List <Enum> subGeners, List <HumanName> authorsName, string volume)
{
Respone <AbstractItem> feedback = new Respone <AbstractItem>();
// create backup of item (if edit will failed - restore the item to previous conditions
AbstractItem backup;
if (item is Book)
{
Book current = item as Book;
backup = new Book("temp", current.ID, current.Category, 1);
}
else if (item is Journal)
{
Journal current = item as Journal;
backup = new Journal(1, "temp", current.ID, current.Category, 1);
}
else
{
feedback.IsWorking = false;
feedback.Message = "Unknown item-type";
feedback.WrongDataType = WrongData.ItemType;
return(feedback);
}
// save backup
if (!backup.RestoreFromBackup(item))
{
feedback.IsWorking = false;
feedback.Message = "Unpredicted Error";
return(feedback);
}
// try edit item
try
{
// abstract fields
item.Title = title;
item.Publisher = publisher;
item.Annotation = annotation;
item.PlaceInLib = placeInLib;
int yearParsed, editionParsed;
if (int.TryParse(year, out yearParsed))
{
item.Year = yearParsed;
}
if (int.TryParse(editionOrIssue, out editionParsed))
{
item.EditionOrIssue = editionParsed;
}
item.ReplaceSubGeneres(subGeners);
// special fields by type
if (item is Book)
{
Book current = item as Book;
current.ReplaceAuthors(authorsName);
}
else if (item is Journal)
{
int volumeParsed;
if (!int.TryParse(volume, out volumeParsed))
{
throw new InvalidVolumException();
}
Journal current = item as Journal;
current.Volume = volumeParsed;
}
feedback.IsWorking = true;
feedback.Data = item;
}
catch (EmptyTitleException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.Title;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (InvalidPublishingDateException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.PublishingDate;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (InvalidEditionOrIssueException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.EditionOrIssue;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (InvalidGenersException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.Genre;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (EmptyLastNameException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.LastName;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (InvalidVolumException e)
{
feedback.IsWorking = false;
feedback.WrongDataType = WrongData.Volume;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
catch (Exception e)
{
feedback.IsWorking = false;
feedback.Message = e.Message;
item.RestoreFromBackup(backup);
}
// if edit worked - resort library (because if item is already added in library and changed it's title- it may destroy sorted-by-title list and search in this)
if (feedback.IsWorking)
{
LibraryManager.GetInstance.ReSort();
}
return(feedback);
}
