private async Task <IList <ProductStantekViewModel> > GetProductsFromCategory(IList <int> productIds, Category category)
{
var builder = new UriBuilder("https://stantek.com");
builder.Port = -1;
var query = HttpUtility.ParseQueryString(builder.Query);
HttpClient httpClient = new HttpClient();
IList <ProductStantekViewModel> products = new List <ProductStantekViewModel>();
foreach (var id in productIds)
{
query["i"] = id.ToString();
builder.Query = query.ToString();
string url = builder.ToString();
ProductStantekViewModel product = await GetProductDetails(url, httpClient);
product.Category = category.Name;
products.Add(product);
}
return(products);
}
private async Task <ProductStantekViewModel> GetProductDetails(string url, HttpClient httpClient)
{
string html;
try
{
html = await httpClient.GetStringAsync(url);
}
catch (Exception)
{
throw new Exception();
}
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
var productDiv = htmlDocument.DocumentNode.Descendants("div")
.Where(node => node.GetAttributeValue("class", "")
.Equals("item-info-desc"))
.FirstOrDefault();
// TODO https://weblog.west-wind.com/posts/2012/jul/19/net-html-sanitation-for-rich-html-input - Make class HtmlSanitizer
string name = "";
if (productDiv != null)
{
name = productDiv.Descendants("div")
.LastOrDefault()
.InnerText
.Trim();
if (name.Length > ValidationConstants.StandartMaxLength)
{
name = name.Substring(0, ValidationConstants.StandartMaxLength);
}
}
var pricesDivs = htmlDocument.DocumentNode.Descendants("div")
.Where(node => node.GetAttributeValue("class", "")
.Equals("item-info-order"))
.FirstOrDefault()
.Descendants("div")
.Where(node => node.GetAttributeValue("class", "")
.Equals("item-price"))
.FirstOrDefault()
.Descendants("div")
.ToArray();
decimal oldPrice = 0;
decimal price = 0;
if (pricesDivs != null)
{
string oldPriceLeva = pricesDivs[1].InnerText.Trim();
// Remove "лв."
oldPriceLeva = oldPriceLeva.Substring(0, oldPriceLeva.Length - 3);
oldPrice = decimal.Parse(oldPriceLeva) / 100;
string priceLeva = pricesDivs[2].InnerText.Trim();
// Remove "лв."
priceLeva = priceLeva.Substring(0, priceLeva.Length - 3);
price = decimal.Parse(priceLeva) / 100;
}
string pictureUrl = htmlDocument.DocumentNode.Descendants("img")
.Where(node => node.GetAttributeValue("id", "")
.Equals("item-info-big-image"))
.FirstOrDefault()
.ChildAttributes("src")
.FirstOrDefault()
.Value;
var fullDescriptionNode = htmlDocument.DocumentNode.Descendants("div")
.Where(node => node.GetAttributeValue("class", "")
.Equals("more-info-panel"))
.FirstOrDefault();
string fullDescription = fullDescriptionNode == null ? "" : fullDescriptionNode.InnerHtml;
ProductStantekViewModel productViewModel = new ProductStantekViewModel()
{
Name = name,
PictureUrl = "../../images/no-image.jpg", // string.IsNullOrEmpty(pictureUrl) ? "../../images/no-image.jpg" : "https://stantek.com" + pictureUrl,
Price = price,
OldPrice = oldPrice,
Discount = oldPrice > 0 ? Math.Round((double)(100 - (oldPrice / price * 100)), MidpointRounding.AwayFromZero) : 0,
FullDescription = fullDescription,
};
return(productViewModel);
}
