Repository pattern used to write data to Sitecore's Experience Database

KeyInteractionsRepository.cs

public class KeyInteractionsRepository : IKeyInteractionsRepository
{
    public void Write(Contact contact, KeyInteractionsModel model)
    {
        IKeyInteractionsFacet facet = contact.GetFacet<IKeyInteractionsFacet>(KeyInteractionsFacet.FacetName);

        if (model.SwatchesDownloaded != null && model.SwatchesDownloaded.Any())
        {
            foreach (KeyValuePair<string, string> keyValuePair in model.SwatchesDownloaded)
            {
                var swatch = facet.SwatchesDownloaded.Create();
                swatch.DecorId = keyValuePair.Value;
                swatch.RangeId = keyValuePair.Key;
            }
        }

        if (model.VideosPlayed != null && model.VideosPlayed.Any())
        {
            foreach (KeyValuePair<string, string> videoPlayed in model.VideosPlayed)
            {
                var video = facet.VideosPlayed.Create();
                video.VideoId = videoPlayed.Key;
                video.VideoUrl = videoPlayed.Value;
            }
        }

        if (model.SampleOrders != null && model.SampleOrders.Any())
        {
            foreach (var sampleOrder in model.SampleOrders)
            {
                var sampleOrdered = facet.SampleOrders.Create();
                sampleOrdered.DecorId = sampleOrder.Key;
                sampleOrdered.RangeId = sampleOrder.Value;
            }
        }
    }
}