private static List<Author> GetOrCreateAuthors(ICollection<Author> authors,
BookstoreDbContext bookstoreDb)
{
if (authors == null || authors.Count == 0)
{
return null;
}
var authorsInContext = new List<Author>();
foreach (var author in authors)
{
var addedAuthor = bookstoreDb.Authors
.FirstOrDefault(a => a.Name.ToLower() == author.Name.ToLower());
if (addedAuthor != null)
{
authorsInContext.Add(addedAuthor);
}
else
{
var newAuthor = new Author
{
Name = author.Name,
};
bookstoreDb.Authors.Add(newAuthor);
authorsInContext.Add(newAuthor);
bookstoreDb.SaveChanges();
}
}
return authorsInContext;
}
public static void SimpleAddBooks(List<NewBook> books)
{
var transaction = new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions() { IsolationLevel = IsolationLevel.RepeatableRead });
using (transaction)
{
var bookstoreDb = new BookstoreDbContext();
foreach (var book in books)
{
var newBook = new Book
{
Title = book.Title,
WebSite = book.WebSite,
Price = book.Price,
ISBN = book.ISBN,
Authors = GetOrCreateAuthors(book.Authors, bookstoreDb),
Reviews = ReviewsAuthorsValidate(book.Reviews, bookstoreDb)
};
bookstoreDb.Books.Add(newBook);
}
bookstoreDb.SaveChanges();
transaction.Complete();
}
}
private static List<SimpleSearchResult> GenerateQuery(string author, string title, string isbn, BookstoreDbContext dbContext)
{
var books = dbContext.Books.Include("Authors").Include("Reviews").AsQueryable();
if (title != null)
{
books = books.Where(b => b.Title.ToLower() == title.ToLower());
}
if (isbn != null)
{
books = books.Where(b => b.ISBN == isbn);
}
if (author != null)
{
books = books.Where(b => b.Authors.Any(a => a.Name.ToLower() == author.ToLower()));
}
books = books.OrderBy(b => b.Title);
var foundBooks = books.Select(b => new SimpleSearchResult
{
Title = b.Title,
ReviewsCount = b.Reviews.Count
}).ToList();
return foundBooks;
}
static void Main()
{
var xmlSearch = new System.Xml.XmlDocument();
//select one of the above Query, Query1
xmlSearch.Load(Query1);
var query = xmlSearch.SelectSingleNode("/query");
var author = query[Author].GetText();
var title = query[Title].GetText();
var isbn = query[ISBN].GetText();
var dbContext = new BookstoreDbContext();
var queryLogEntry = new SearchLogEntry
{
Date = DateTime.Now,
QueryXml = query.OuterXml
};
var foundBooks = GenerateQuery(author, title, isbn, dbContext);
dbContext.SearchLog.Add(queryLogEntry);
dbContext.SaveChanges();
PrintResult(foundBooks);
}
private static List<Review> ReviewsAuthorsValidate(ICollection<Review> reviews, BookstoreDbContext BookstoreDb)
{
if (reviews == null)
{
return null;
}
foreach (var review in reviews)
{
if (review.Author != null && review.Author.Name != null)
{
var author = GetOrCreateAuthors(new List<Author> { review.Author }, BookstoreDb);
review.Author = author.First();
}
}
return reviews.ToList();
}
public EFBookstoreRepository(BookstoreDbContext context)
{
_context = context;
}
public static void EnsurePopulated(IApplicationBuilder applicatoin)
{
BookstoreDbContext context = applicatoin.ApplicationServices.
CreateScope().ServiceProvider.GetRequiredService <BookstoreDbContext>();
if (context.Database.GetPendingMigrations().Any())
{
context.Database.Migrate();
}
if (!context.Books.Any())
{
context.Books.AddRange(
new Book
{
Title = "Les Miserables",
AuthorFirst = "Victor",
AuthorMiddle = " ",
AuthorLast = "Hugo",
Publisher = "Signet",
ISBN = "978-0451419439",
Classification = "Fiction",
Category = "Classic",
Price = 9.95,
},
new Book
{
Title = "Team of Rivals",
AuthorFirst = "Doris",
AuthorMiddle = "Kearns",
AuthorLast = "Goodwin",
Publisher = "Simon & Schuster",
ISBN = "978-0743270755",
Classification = "Non-Fiction",
Category = "Biography",
Price = 14.58,
},
new Book
{
Title = "The Snowball",
AuthorFirst = "Alice",
AuthorMiddle = " ",
AuthorLast = "Schroeder",
Publisher = "Bantam",
ISBN = "978-0553384611",
Classification = "Non-Fiction",
Category = "Biography",
Price = 21.54,
},
new Book
{
Title = "American Ulysses",
AuthorFirst = "Ronald",
AuthorMiddle = "C.",
AuthorLast = "White",
Publisher = "Random House",
ISBN = "978-0812981254",
Classification = "Non-Fiction",
Category = "Biography",
Price = 11.61,
},
new Book
{
Title = "Unbroken",
AuthorFirst = "Laura",
AuthorMiddle = " ",
AuthorLast = "Hillenbrand",
Publisher = "Random House",
ISBN = "978-0812974492",
Classification = "Non-Fiction",
Category = "Historical",
Price = 13.33,
},
new Book
{
Title = "The Great Train Robbery",
AuthorFirst = "Michael",
AuthorMiddle = " ",
AuthorLast = "Crichton",
Publisher = "Vintage",
ISBN = "978-0804171281",
Classification = "Fiction",
Category = "Historical Fiction",
Price = 15.95,
},
new Book
{
Title = "Deep Work",
AuthorFirst = "Cal",
AuthorMiddle = " ",
AuthorLast = "Newport",
Publisher = "Grand Central Publishing",
ISBN = "978-1455586691",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 14.99,
},
new Book
{
Title = "It's Your Ship",
AuthorFirst = "Michael",
AuthorMiddle = " ",
AuthorLast = "Abrashoff",
Publisher = "Grand Central Publishing",
ISBN = "978-1455523023",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 21.66,
},
new Book
{
Title = "The Virgin Way",
AuthorFirst = "Richard",
AuthorMiddle = " ",
AuthorLast = "Branson",
Publisher = "Portfolio",
ISBN = "978-1591847984",
Classification = "Non-Fiction",
Category = "Business",
Price = 29.16,
},
new Book
{
Title = "Sycamore Row",
AuthorFirst = "John",
AuthorMiddle = " ",
AuthorLast = "Grisham",
Publisher = "Bantam",
ISBN = "978-0553393613",
Classification = "Fiction",
Category = "Thrillers",
Price = 15.03,
}
);
context.SaveChanges();
}
}
public static List<Review> FindReviews(string type, string startDate, string endDate, string author)
{
using (var dbContex = new BookstoreDbContext())
{
var reviews = dbContex.Reviews.Include("Author").Include("Book").AsQueryable();
if (startDate != null)
{
var starOfPeriod = DateTime.Parse(startDate);
var endOfPeriod = DateTime.Parse(endDate);
reviews = reviews.Where(r => r.CreationDate >= starOfPeriod && r.CreationDate <= endOfPeriod);
}
if (author != null)
{
reviews = reviews.Where(r => r.Author.Name.ToLower() == author.ToLower());
}
reviews = reviews.OrderBy(r => r.CreationDate).ThenBy(r => r.Text).Select(r => new Review
{
CreationDate = r.CreationDate,
Text = r.Text,
Book = new Book
{
Authors = r.Book.Authors,
Title = r.Book.Title,
WebSite = r.Book.WebSite,
ISBN = r.Book.ISBN,
}
});
return reviews.ToList();
}
}
public static void EnsurePopulated(IApplicationBuilder application)
{
BookstoreDbContext context = application.ApplicationServices.CreateScope().ServiceProvider.GetRequiredService <BookstoreDbContext>();
//Check if there are any pendin migrations and migrate them
if (context.Database.GetPendingMigrations().Any())
{
context.Database.Migrate();
}
//Check if there are not any books
if (!context.Books.Any())
{
//Add books if there are not any yet
context.Books.AddRange(
new Book
{
ISBN = "978-0451419439",
Title = "Les Miserables",
AuthorFirstName = "Victor",
AuthorLastName = "Hugo",
Publisher = "Signet",
Classification = "Fiction",
Category = "Classic",
Price = 9.95,
Pages = 1488
},
new Book
{
ISBN = "978-0743270755",
Title = "Team of Rivals",
AuthorFirstName = "Doris",
AuthorMiddleName = "Kearns",
AuthorLastName = "Goodwin",
Publisher = "Simon & Schuster",
Classification = "Non-Fiction",
Category = "Biography",
Price = 14.58,
Pages = 944
},
new Book
{
ISBN = "978-0553384611",
Title = "The Snowball",
AuthorFirstName = "Alice",
AuthorLastName = "Schroeder",
Publisher = "Bantam",
Classification = "Non-Fiction",
Category = "Biography",
Price = 21.54,
Pages = 832
},
new Book
{
ISBN = "978-0812981254",
Title = "American Ulysses",
AuthorFirstName = "Ronald",
AuthorMiddleName = "C.",
AuthorLastName = "White",
Publisher = "Random House",
Classification = "Non-Fiction",
Category = "Biography",
Price = 21.54,
Pages = 864
},
new Book
{
ISBN = "978-0812974492",
Title = "Unbroken",
AuthorFirstName = "Laura",
AuthorLastName = "Hillenbrand",
Publisher = "Random House",
Classification = "Non-Fiction",
Category = "Historical",
Price = 13.33,
Pages = 528
},
new Book
{
ISBN = "978-0804171281",
Title = "The Great Train Robbery",
AuthorFirstName = "Michael ",
AuthorLastName = "Crichton",
Publisher = "Vintage",
Classification = "Fiction",
Category = "Historical Fiction",
Price = 15.95,
Pages = 288
},
new Book
{
ISBN = "978-1455586691",
Title = "Deep Work",
AuthorFirstName = "Cal",
AuthorLastName = "Newport",
Publisher = "Grand Central Publishing",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 14.99,
Pages = 304
},
new Book
{
ISBN = "978-1455523023",
Title = "It's Your Ship",
AuthorFirstName = "Michael",
AuthorLastName = "Abrashoff",
Publisher = "Grand Central Publishing",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 21.66,
Pages = 240
},
new Book
{
ISBN = "978-1591847984",
Title = "The Virgin Way",
AuthorFirstName = "Richard",
AuthorLastName = "Branson",
Publisher = "Portfolio",
Classification = "Non-Fiction",
Category = "Business",
Price = 29.16,
Pages = 400
},
new Book
{
ISBN = "978-0553393613",
Title = "Sycamore Row",
AuthorFirstName = "John",
AuthorLastName = "Grisham",
Publisher = "Bantam",
Classification = "Non-Fiction",
Category = "Thrillers",
Price = 15.03,
Pages = 642
},
new Book
{
ISBN = "978-1432859329",
Title = "Blackmoore",
AuthorFirstName = "Julianne",
AuthorLastName = "Donaldson",
Publisher = "Shadow Mountain",
Classification = "Fiction",
Category = "Romance",
Price = 9.51,
Pages = 320
},
new Book
{
ISBN = "978-2382261101",
Title = "How to Win Friends and Influence People",
AuthorFirstName = "Dale",
AuthorLastName = "Carnegie",
Publisher = "Pocket Books",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 10.38,
Pages = 288
},
new Book
{
ISBN = "978-2382261101",
Title = "Grit",
AuthorFirstName = "Angela",
AuthorLastName = "Duckworth",
Publisher = "Scribner Book Company",
Classification = "Non-Fiction",
Category = "Self-Help",
Price = 19.04,
Pages = 352
}
);
//Save the changes
context.SaveChanges();
}
}
private BookstoreDbContext _context; // private BookstoreDbContext type called context _ means private
public EFBookstoreRepository(BookstoreDbContext context) // Constructor
{
_context = context;
}
//Constructor
public EFBookstoreRepository(BookstoreDbContext context)
{
//Store the parameter context into the private context
_context = context;
}
