/// <summary>
/// Gets a bird thumbnail url from the Flickr API or the cache
/// </summary>
/// <param name="observations"></param>
/// <returns></returns>
public IEnumerable <ObservationFeedDto> GetThumbnailUrl(IEnumerable <ObservationFeedDto> observations)
{
if (observations is null)
{
throw new ArgumentNullException(nameof(observations), "The observations collection is null");
}
foreach (var observation in observations)
{
try
{
if (_cache.TryGetValue(GenerateCacheEntryKey(observation.BirdId), out string cacheUrl))
{
observation.ThumbnailUrl = cacheUrl;
}
else
{
observation.ThumbnailUrl = _flickrService.GetThumbnailUrl(observation.Species);
AddResponseToCache(observation.BirdId, observation.ThumbnailUrl);
}
}
catch (Exception ex)
{
observation.ThumbnailUrl = defaultUrl;
string message = $"An error occurred setting the thumbnail url for birdId '{observation.BirdId}'.";
_logger.LogError(LoggingEvents.GetItem, ex, message);
}
}
return(observations);
}