public IEnumerable <IGrouping <int, LibraryItem> > GetItemsByYearPublishing()
{
List <LibraryItem> result = new List <LibraryItem>();
result.Concat(BookRepository.GetBookRepository().Books).Concat(PaperIssueRepository.GetPaperIssueRepository().Papers).Concat(PatentRepository.GetPatentRepository().Patents);
return(result.GroupBy(s => s.YearOfPublishing));
}
public IEnumerable <LibraryItem> GetSortedByYearOfPublishing()
{
List <LibraryItem> result = new List <LibraryItem>();
result.Concat(BookRepository.GetBookRepository().Books).Concat(PaperIssueRepository.GetPaperIssueRepository().Papers).Concat(PatentRepository.GetPatentRepository().Patents);
return(result.ToArray().OrderBy(s => s.YearOfPublishing));
}
public IEnumerable <LibraryItem> GetAllLibraryItems()
{
List <LibraryItem> result = new List <LibraryItem>();
result.Concat(BookRepository.GetBookRepository().Books).Concat(PaperIssueRepository.GetPaperIssueRepository().Papers).Concat(PatentRepository.GetPatentRepository().Patents);
return(result.ToArray());
}
public bool Exists(PaperIssue paper)
{
if (!string.IsNullOrEmpty(paper.Paper.Issn))
{
var result = from paperEnt in PaperIssueRepository.GetPaperIssueRepository().Papers
where paperEnt.Paper.Issn == paper.Paper.Issn
select paperEnt;
return(result.Any());
}
else
{
var result = from paperEnt in PaperIssueRepository.GetPaperIssueRepository().Papers
where paperEnt.Paper.Name == paper.Paper.Name
where paperEnt.Publisher == paper.Publisher
where paperEnt.YearOfPublishing == paper.YearOfPublishing
select paperEnt;
return(result.Any());
}
}
public IEnumerable <LibraryItem> GetLibraryItemsByTitle(string title)
{
if (string.IsNullOrWhiteSpace(title))
{
throw new ArgumentException("Title is null or empty", nameof(title));
}
List <LibraryItem> list = new List <LibraryItem>();
list.Concat(from patent in PatentRepository.GetPatentRepository().Patents
where patent.Name.Contains(title)
select patent);
list.Concat(from book in BookRepository.GetBookRepository().Books
where book.Name.Contains(title)
select book);
list.Concat(from newspaper in PaperIssueRepository.GetPaperIssueRepository().Papers
where newspaper.Paper.Name.Contains(title)
select newspaper);
return(list.ToArray());
}
public bool RemoveItem(int id)
{
var result = PaperIssueRepository.GetPaperIssueRepository().Papers.RemoveAll(paper => paper.Id == id);
return(result > 0);
}
public PaperIssue GetItemById(int id)
{
return(PaperIssueRepository.GetPaperIssueRepository().Papers.FirstOrDefault(i => i.Id == id));
}
public IEnumerable <PaperIssue> GetAllItems()
{
return(PaperIssueRepository.GetPaperIssueRepository().Papers.ToArray());
}
public int AddItem(PaperIssue paper)
{
paper.Id = ++IdStorage.UniqueId;
PaperIssueRepository.GetPaperIssueRepository().Papers.Add(paper);
return(IdStorage.UniqueId);
}
