/// <summary>
/// Removes movie image entity and image entity
/// and if there are no other image entities
/// that points to the deleted image entity
/// method returns underlying image url
/// otherwise null is returned
/// </summary>
/// <param name="movieImageId">MovieImage entity id</param>
/// <returns>Underlying image url or null</returns>
public async Task <string> RemoveMovieImage(Guid movieImageId)
{
var movieImage = await MovieImageRepo
.GetAll()
.FirstOrDefaultAsync(mi => mi.Id == movieImageId);
if (movieImage == null)
{
return(null);
}
var image = await ImageRepo
.GetAll()
.FirstOrDefaultAsync(i => i.Id == movieImage.ImageId);
var otherImagesWithSameUrl = await ImageRepo
.GetAll(i => i.Url == image.Url && i.Id != image.Id)
.ToListAsync();
MovieImageRepo.Delete(movieImage);
await MovieImageRepo.SaveChangesAsync();
ImageRepo.Delete(image);
await ImageRepo.SaveChangesAsync();
return(otherImagesWithSameUrl.Count > 0 ? null : image.Url);
}
public void Scrape(int maxNotFoundStreak)
{
int notFoundStreak = 0;
for (int id = 0; notFoundStreak < maxNotFoundStreak; id++)
{
try
{
_imageRepo.AddOrUpdate(_fetchImage(id));
notFoundStreak = 0;
}
catch (NotFoundException)
{
_imageRepo.Delete(id);
notFoundStreak++;
}
}
}