public async Task<Book> Scrape(string isbn)
{
var doc = new HtmlDocument();
var client = new HttpClient();
var address = $"http://www.barnesandnoble.com/w/clean-code-robert-c-martin/?ean={isbn}#productInfoTabs";
//var result = await client.GetByteArrayAsync($"http://www.barnesandnoble.com/w/clean-code-robert-c-martin/?ean={isbn}#productInfoTabs");
var result = await client.GetByteArrayAsync(address);
doc.Load(new MemoryStream(result));
var title = doc.DocumentNode.Descendants()
.FirstOrDefault(x => x.Attributes.Any(y => y.Name == "itemprop" && y.Value == "name"))?.InnerText ?? string.Empty;
var authors = doc.DocumentNode.Descendants()
.FirstOrDefault(x => x.Attributes.Any(y => y.Name == "class" && y.Value == "contributors"))?.Descendants().Where(x => x.Name == "a")?.Select(y => y.InnerText) ?? Enumerable.Empty<String>();
var authorsString = string.Join(", ", authors);
var imageUrl =
doc.DocumentNode.Descendants()?
.FirstOrDefault(x => x.Attributes.Any(y => y.Name == "itemprop" && y.Value == "image"))?
.Attributes.FirstOrDefault(z => z.Name == "src")?.Value;
imageUrl = (imageUrl.StartsWith("//")) ? "https://" + imageUrl.Remove(0, 2) : "https://" + imageUrl;
string datePattern = "\\d{1,2}\\/\\d{1,2}\\/\\d{4,4}";
Regex regEx = new Regex(datePattern);
var additionalProductInfo =
doc.DocumentNode.Descendants()
.FirstOrDefault(x => x.Attributes.Any(y => y.Name == "id" && y.Value == "additionalProductInfo"));
var dl = additionalProductInfo?.ChildNodes.FirstOrDefault(x => x.Name == "dl");
var date =
dl?.ChildNodes.Where(x => x.Name == "dd")
.FirstOrDefault(z => regEx.Match(z.InnerText).Success).InnerText;
string yearPattern = "\\d{4,4}";
regEx = new Regex(yearPattern);
var year = int.Parse(regEx.Match(date).Groups[0].ToString());
var book = new Book
{
Author = authorsString,
Title = title,
Year = year,
InformationLink = address,
ImageLink = imageUrl
};
return book;
}
public ActionResult Add(Book newBook)
{
if(newBook.ISBN.Length == 10 || newBook.ISBN.Length == 13)
{
var existingBook = _db.Books.FirstOrDefault(x => x.ISBN == newBook.ISBN);
if (existingBook == null)
{
newBook.CountAvailable = newBook.TotalCount;
_db.Books.Add(newBook);
}
else
{
existingBook.TotalCount += newBook.TotalCount;
existingBook.CountAvailable += newBook.TotalCount;
}
_db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.Message = "Feil i ISBN-nummer";
return View();
}
public ActionResult Editor(Book book, int id)
{
book.Id = id;
var eBook = _db.Books.FirstOrDefault(x => x.Id == id);
eBook.ImageLink = book.ImageLink;
eBook.Author = book.Author;
eBook.Category = book.Category;
eBook.CountAvailable = book.CountAvailable;
eBook.TotalCount = book.TotalCount;
eBook.Title = book.Title;
eBook.InformationLink = book.InformationLink;
eBook.Year = book.Year;
_db.Entry(eBook).State = EntityState.Modified;
_db.SaveChanges();
return RedirectToAction("Index");
}