def add_user(username: str, password: str, repo: AbstractRepository):
# Check that the given username is available.
user = repo.get_user(username)
if user is not None:
raise NameNotUniqueException
# Encrypt password so that the database doesn't store passwords 'in the clear'.
password_hash = generate_password_hash(password)
# Create and store the new User, with password encrypted.
user = User(username, password_hash)
repo.add_user(user)
def authenticate_user(username: str, password: str, repo: AbstractRepository):
authenticated = False
user = repo.get_user(username)
if user is not None:
authenticated = check_password_hash(user.password, password)
if not authenticated:
raise AuthenticationException
def add_review(movie: Movie, comment_text: str, rating: int, username: str,
repo: AbstractRepository):
# Check that the movie exists.
movie = repo.get_movie(movie)
if movie is None:
raise NonExistentMovieException
user = repo.get_user(username)
if user is None:
raise UnknownUserException
# Create comment.
comment = Review(movie, comment_text, rating)
comment.user = user
user.add_review(comment)
movie.add_review(comment)
# Update the repository.
repo.add_review(comment)
def get_user(username: str, repo: AbstractRepository):
user = repo.get_user(username)
if user is None:
raise UnknownUserException
return user_to_dict(user)
def get_movie(repo: AbstractRepository, movie):
if movie is None:
raise NonExistentMovieException
movie = repo.get_movie_by_title(movie)
return movie
def get_10_movies_genre(repo: AbstractRepository, genre):
movies = repo.get_10_movies_genre(genre)
return movies
def get_genres(repo: AbstractRepository):
genres = repo.get_genres()
return genres
def get_ten_movies(repo: AbstractRepository):
movies = repo.get_10_movies()
return movies
def get_all_movies_genre(repo: AbstractRepository, genre):
if genre is None:
raise NonExistentGenreException
movies = repo.get_all_movies_genre(genre)
return movies
def get_movies_by_actor(repo: AbstractRepository, title):
if title is None:
raise NonExistentActorException
movies = repo.get_movies_by_actor(title)
return movies