Geta Google Product Feed

Credits: How to make a Google Shopping Feed with C# and serve it through the Web API.

This will create a Google Product Feed based on the Atom specification. For information on what is required and what the different attributes/properties mean, please see the Product data specification.

Installation

Install-Package Geta.GoogleProductFeed

Note that you need to make sure your projects calls config.MapHttpAttributeRoutes(); in order for the feed routing to work.

Default URL is: /googleproductfeed

FeedBuilder

You need to implement the abstract class FeedBuilder and the method Build. This will provide the feed data.

Example

public class EpiFeedBuilder : FeedBuilder
{
	public override Feed Build()
	{
		var feed = new Feed
		{
			Updated = DateTime.UtcNow,
			Title = "My products",
			Link = "https://mysite.com"
		};

		var catalogReferences = _contentLoader.GetDescendents(_referenceConverter.GetRootLink());

		var entries = new List<Entry>();
		var market = _currentMarket.GetCurrentMarket();
		var currency = _currencyservice.GetCurrentCurrency();

		foreach (var catalogReference in catalogReferences)
		{
			var catalogContent = _contentLoader.Get<CatalogContentBase>(catalogReference);

			// ReSharper disable once IsExpressionAlwaysFalse
			if (catalogContent is DefaultVariationContent)
			{
				var variationContent = (DefaultVariationContent)catalogContent;
				var defaultPrice = ProductHelper.GetDefaultPrice(variationContent, market, currency);

				var entry = new Entry
				{
					Id = variationContent.Code,
					Title = variationContent.DisplayName,
					Description = variationContent.Description.ToHtmlString(),
					Link = variationContent.ContentLink.GetFriendlyUrl(true),
					Condition = "new",
					Availablity = "in stock",
					Brand = variationContent.Brand,
					MPN = "",
					GTIN = variationContent.GTIN,
					GoogleProductCategory = "",
					Shipping = new List<Shipping>
					{
						new Shipping
						{
							Price = "Free",
							Country = "US",
							Service = "Standard"
						}
					}
				};
				
				string image = variationContent.GetDefaultAsset<IContentImage>();

				if (!string.IsNullOrEmpty(image))
				{
				    var imageUrl = new Url(image);

				    entry.ImageLink = imageUrl.ToAbsoluteUri().ToString();
				}

				if (defaultPrice != null)
				{
					var discountPrice = ProductHelper.GetDiscountPrice(defaultPrice, market, currency);

					entry.Price = defaultPrice.UnitPrice.ToString();
					entry.SalePrice = discountPrice.ToString();
					entry.SalePriceEffectiveDate = DateTime.UtcNow;
				}

				entries.Add(entry);
			}
		}

		feed.Entries = entries;

		return feed;
	}
}

Then you need to use this as the default implementation for FeedBuilder. Using StructureMap it will look something like this in your registry class:

For<FeedBuilder>().Use<EpiFeedBuilder>();

Make sure dependency injection is setup for Web API. The quickest way to do this is install the package: Foundation.WebApi.

Feed Generation

Populating the feed is handled through a scheduled job and the result is serialized and stored in the DDS. See job 'Google ProductFeed - Create feed' in admin mode.

Troubleshooting

If your request to /googleproductfeed returns 404 with message 'No feed generated', make sure you run the job to populate the feed.