public async Task <IEnumerable <Video> > GetVideosInCategoryAsync(short categoryId, string[] roles)
{
var videos = await GetCachedValueAsync(
() => _cache.GetVideosAsync(roles, categoryId),
() => _repo.GetVideosInCategoryAsync(categoryId, roles)
);
return(videos ?? new List <Video>());
}
async Task UpdateVideoCache(Category category, string[] allRoles)
{
var dbVideos = await _repo.GetVideosInCategoryAsync(category.Id, allRoles);
var cacheVideos = await _cache.GetVideosAsync(allRoles, category.Id);
var updatedVideos = dbVideos.Except(cacheVideos.Item ?? new List <Video>());
if (updatedVideos.Count() > 0)
{
var securedVideos = updatedVideos.Select(video => new SecuredResource <Video>(
video,
allRoles
));
await _cache.AddVideosAsync(securedVideos);
}
}