public IEnumerable<Book> GetAuthorBooks(string authorName)
{
List<Book> result;
string firstWord = authorName;
string secondWord = authorName;
if (authorName.Contains(' '))
{
firstWord = authorName.Split(' ')[0];
secondWord = authorName.Split(' ')[1];
using (var context = new TheLibraryEntities())
{
result = (from book in context.Books.Include("Author")
where (book.Author.Name.Contains(firstWord) && book.Author.Lastname.Contains(secondWord))
|| (book.Author.Name.Contains(secondWord) && book.Author.Lastname.Contains(firstWord))
select book).ToList();
}
}
else
{
using (var context = new TheLibraryEntities())
{
result = (from book in context.Books.Include("Author")
where book.Author.Name.Contains(authorName) || book.Author.Lastname.Contains(authorName)
select book).ToList();
}
}
return result;
}
public IEnumerable<Book> GetAllBooks()
{
List<Book> result;
using (var context = new TheLibraryEntities())
{
result = context.Books.Include("Author").ToList();
}
return result;
}
public IEnumerable<Author> GetAllAuthors()
{
List<Author> result;
using (var context = new TheLibraryEntities())
{
result = context.Authors.ToList();
}
return result;
}
public IEnumerable<Author> GetAllNamesakes()
{
List<Author> result = new List<Author>();
using (var context = new TheLibraryEntities())
{
var namesakes = (from author in context.Authors
group author by author.Lastname into g
select g).Where(k => k.Count() > 1).ToList();
foreach (var namesake in namesakes)
{
result.AddRange(namesake);
}
}
return result;
}
public IEnumerable<Book> GetAverageRateBook(int year)
{
IEnumerable<Book> result = new List<Book>();
using (var context = new TheLibraryEntities())
{
int countBook = (from book in context.Books
where book.BookIssuances.Where(i => i.IssuanceDate.Year == year).Count() > 0
select book).Count();
int countIssuance = context.BookIssuances.Where(c => c.IssuanceDate.Year == year).Count();
if (countBook != 0)
{
result = (from book in context.Books.Include("Author")
where book.BookIssuances.Where(i => i.IssuanceDate.Year == year).Count() >= countIssuance / countBook
select book).ToList();
}
}
return result;
}
public IEnumerable<Author> GetPopularInYear(int year)
{
IEnumerable<Author> result;
using (var context = new TheLibraryEntities())
{
result = (from author in context.Authors
select new
{
Author = author,
PopularityIndex = (from book in author.Books
select (from issuance in book.BookIssuances
where issuance.IssuanceDate.Year == year
select issuance).Count()
).Sum()
}).Where(a => a.PopularityIndex > 0)
.OrderByDescending(a => a.PopularityIndex)
.Select(a => a.Author).Take(1).ToList();
}
return result;
}
public IEnumerable<Book> GetUndefinedBook(string year, string name)
{
IEnumerable<Book> result;
int publish;
if (int.TryParse(year, out publish))
{
using (var context = new TheLibraryEntities())
{
result = (from book in context.Books
where (book.PublishDate.Value.Year == publish && book.Name.Contains(name))
select book).ToList();
}
}
else
{
using (var context = new TheLibraryEntities())
{
result = (from book in context.Books
where book.Name.Contains(name)
select book).ToList();
}
}
return result;
}
