def get_random_articles(quantity, repo: AbstractRepository):
article_count = repo.get_number_of_movie()
if quantity >= article_count:
# Reduce the quantity of ids to generate if the repository has an insufficient number of articles.
quantity = article_count - 1
# Pick distinct and random articles.
random_ids = random.sample(range(1, article_count), quantity)
articles = repo.get_movie_by_rank(random_ids)
return articles_to_dict(articles)
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 get_movie_by_rank(rank, repo: AbstractRepository):
movies = repo.get_movie_by_rank(target_rank=rank)
movies_data = list()
prev_rank = next_rank = None
if len(movies) > 0:
prev_rank = repo.get_rank_of_previous_movie(movies[0])
next_rank = repo.get_rank_of_next_movie(movies[0])
# Convert Articles to dictionary form.
movies_data = movies_to_dict(movies)
return movies_data, prev_rank, next_rank
def add_comment(movie_rank: int, comment_text: str, username: str, repo: AbstractRepository):
# Check that the movie exists.
movie = repo.get_movie(movie_rank)
if movie is None:
raise NonExistentMovieException
user = repo.get_user(username)
if user is None:
raise UnknownUserException
# Create comment.
comment = make_comment(comment_text, user, movie)
# Update the repository.
repo.add_comment(comment)
def get_movies_by_rank(id_list, repo: AbstractRepository):
articles = repo.get_movie_by_rank(id_list)
# Convert Articles to dictionary form.
articles_as_dict = articles_to_dict(articles)
return articles_as_dict
def get_comments_for_article(article_id, repo: AbstractRepository):
article = repo.get_movie(article_id)
if article is None:
raise NonExistentArticleException
return reviews_to_dict(article.review)
def get_movie(article_id: int, repo: AbstractRepository):
article = repo.get_movie(article_id)
if article is None:
raise NonExistentArticleException
return article_to_dict(article)
def add_review(article_id: int, comment_text: str, username: str,
repo: AbstractRepository):
# Check that the article exists.
article = repo.get_movie(article_id)
if article is None:
raise NonExistentArticleException
user = repo.get_user(username)
if user is None:
raise UnknownUserException
# Create comment.
comment = make_comment(comment_text, user, article)
# Update the repository.
repo.add_review(comment)
def get_comments_for_movie(movie_id, repo: AbstractRepository):
movie = repo.get_movie(movie_id)
if movie is None:
raise NonExistentMovieException
return comments_to_dict(movie.comments)
def get_movie(movie_rank: int, repo: AbstractRepository):
movie = repo.get_movie(movie_rank)
if movie is None:
raise NonExistentMovieException
return movie_to_dict(movie)
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 get_movies_by_year(date, repo: AbstractRepository):
# Returns articles for the target date (empty if no matches), the date of the previous article (might be null), the date of the next article (might be null)
articles = repo.get_movie_by_year(target_date=date)
articles_dto = list()
prev_date = next_date = None
if len(articles) > 0:
# Convert Articles to dictionary form.
articles_dto = articles_to_dict(articles)
return articles_dto, prev_date, next_date
def get_movie_ranks_for_director(director_name, repo: AbstractRepository):
movie_ids = repo.get_movie_ranks_for_director(director_name)
return movie_ids
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_first_movie(repo: AbstractRepository):
first_movie = repo.get_first_movie()
return movie_to_dict(first_movie)
def get_genre_names(repo: AbstractRepository):
tags = repo.get_genres()
tag_names = [tag.genre_name for tag in tags]
return tag_names
def get_last_movie(repo: AbstractRepository):
last_movie = repo.get_last_movie()
return movie_to_dict(last_movie)
def get_director_name(repo: AbstractRepository):
director = repo.get_directors()
return director
def get_actor_name(repo: AbstractRepository):
actors = repo.get_actors()
actor_names = [actor.actor_full_name for actor in actors]
return actor_names
def get_genre_names(repo: AbstractRepository):
genres = repo.get_genres()
genre_names = [genre.genre_name for genre in genres]
return genre_names
def get_last_movie(repo: AbstractRepository):
article = repo.get_last_movie()
return article_to_dict(article)
def get_movie_ranks_for_genre(tag_name, repo: AbstractRepository):
article_ids = repo.get_movie_ranks_for_genre(tag_name)
return article_ids
