def get_reviews_for_movie(movie_rank: int, repo: AbstractRepository):
movie = repo.get_movie_by_rank(movie_rank)
if movie is None:
raise ServicesException('Movie does not exist in the repository')
return repo.get_reviews_for_movie(movie)
def create_review(movie_rank: int, review_text: str, rating: int,
user_name: str, repo: AbstractRepository):
# Check that the Movie exists.
movie = repo.get_movie_by_rank(movie_rank)
if movie is None:
raise ServicesException('Movie does not exist in the repository')
# Check that the user exists.
user = repo.get_user(user_name)
if user is None:
raise ServicesException('User does not exist in the repository')
# Create review
review = Review(movie, review_text, rating)
# Add review to list of user reviews (and consequently to list of Movie reviews)
user.add_review(review)
# Update the repository with new Review.
repo.add_review(review)