/// <summary>
/// Given a collection of detected objects, create the tags, put them in the cache,
/// and then return a list of keyword => TagID key-value pairs
/// </summary>
/// <param name="objects"></param>
/// <returns></returns>
private async Task <IDictionary <string, int> > CreateNewTags(IList <ImageDetectResult> objects)
{
var allLabels = objects.Select(x => x.Tag).Distinct().ToList();
var tags = await _metdataService.CreateTagsFromStrings(allLabels);
return(tags.ToDictionary(x => x.Keyword, y => y.TagId, StringComparer.OrdinalIgnoreCase));
}