def login():
form = LoginForm()
username_not_recognised = None
password_does_not_match_username = None
if form.validate_on_submit():
# Successful POST, i.e. the username and password have passed validation checking.
# Use the service layer to lookup the user.
try:
user = services.get_user(form.username.data, repo.repo_instance)
# Authenticate user.
services.authenticate_user(user['username'], form.password.data,
repo.repo_instance)
# Initialise session and redirect the user to the home page.
session.clear()
session['username'] = user['username']
return redirect(url_for('home_bp.home'))
except services.UnknownUserException:
# Username not known to the system, set a suitable error message.
username_not_recognised = 'Username is invalid - please try again'
except services.AuthenticationException:
# Authentication failed, set a suitable error message.
password_does_not_match_username = '******'
# For a GET or a failed POST, return the Login Web page.
return render_template(
'authentication/credentials.html',
title='Login',
username_error_message=username_not_recognised,
password_error_message=password_does_not_match_username,
form=form,
featured_movies=utilities.get_featured_movies(),
genre_urls=utilities.get_genres_and_urls())
def review_on_movie():
# Obtain the username of the currently logged in user.
username = session['username']
# Create form. The form maintains state, e.g. when this method is called with a HTTP GET request and populates
# the form with a movie rank, when subsequently called with a HTTP POST request, the movie rank remains in the
# form.
form = ReviewForm()
if form.validate_on_submit():
# Successful POST, i.e. the review text has passed data validation.
# Extract the movie rank, representing the reviewed movie, from the form.
movie_rank = int(form.movie_rank.data)
# Use the service layer to store the new review.
services.add_review(movie_rank, form.review.data, form.rating.data,
username, repo.repo_instance)
# Retrieve the movie in dict form.
movie = services.get_movie(movie_rank, repo.repo_instance)
return redirect(
url_for('movies_bp.movie_after_review',
view_reviews_for=movie_rank,
movie_rank=movie_rank))
if request.method == 'GET':
# Request is a HTTP GET to display the form.
# Extract the movie rank, representing the movie to review, from a query parameter of the GET request.
movie_rank = int(request.args.get('movie'))
# Store the movie rank in the form.
form.movie_rank.data = movie_rank
else:
# Request is a HTTP POST where form validation has failed.
# Extract the movie rank of the movie being reviewed from the form.
movie_rank = int(form.movie_rank.data)
# For a GET or an unsuccessful POST, retrieve the movie to review in dict form, and return a web page that allows
# the user to enter a review. The generated web page includes a form object.
movie = services.get_movie(movie_rank, repo.repo_instance)
return render_template('movies/review_on_movie.html',
title='Review Movie',
movie=movie,
form=form,
handler_url=url_for('movies_bp.review_on_movie'),
featured_movies=utilities.get_featured_movies(),
genre_urls=utilities.get_genres_and_urls())
def movie_after_review():
# Read query parameters.
movie_to_show_reviews = request.args.get('view_reviews_for')
movie_rank = request.args.get('movie_rank')
if movie_to_show_reviews is None:
# No view-reviews query parameter, so set to a non-existent movie rank.
movie_to_show_reviews = 0
else:
# Convert movie_to_show_reviews from string to int.
movie_to_show_reviews = int(movie_to_show_reviews)
if movie_rank is None:
# No movie_rank query parameter, so set to a non-existent movie rank.
movie_rank = 0
else:
# Convert movie_rank from string to int.
movie_rank = int(movie_rank)
# Retrieve the movie to display on the web page.
movie = services.get_movie(movie_rank, repo.repo_instance)
# Construct urls for viewing movie reviews and adding reviews.
movie['view_review_url'] = url_for('movies_bp.movie_after_review',
view_reviews_for=movie['rank'],
movie_rank=movie['rank'])
movie['add_review_url'] = url_for('movies_bp.review_on_movie',
movie=movie['rank'])
movie['reviews'] = services.get_reviews_for_movie(movie['rank'],
repo.repo_instance)
movies = [movie]
first_movie_url = None
last_movie_url = None
next_movie_url = None
prev_movie_url = None
# Generate the webpage to display the movie.
return render_template('movies/movies.html',
title='Movies',
movies_title='Thank you for reviewing!',
movies=movies,
featured_movies=utilities.get_featured_movies(3),
genre_urls=utilities.get_genres_and_urls(),
first_movie_url=first_movie_url,
last_movie_url=last_movie_url,
prev_movie_url=prev_movie_url,
next_movie_url=next_movie_url,
show_reviews_for_movie=movie_to_show_reviews)
def register():
form = RegistrationForm()
username_not_unique = None
if form.validate_on_submit():
# Successful POST, i.e. the username and password have passed validation checking.
# Use the service layer to attempt to add the new user.
try:
services.add_user(form.username.data, form.password.data,
repo.repo_instance)
# All is well, redirect the user to the login page.
return redirect(url_for('authentication_bp.login'))
except services.NameNotUniqueException:
username_not_unique = 'Username is already used - please try again'
# For a GET or a failed POST request, return the Registration web page.
return render_template('authentication/credentials.html',
title='Register',
form=form,
username_error_message=username_not_unique,
handler_url=url_for('authentication_bp.register'),
featured_movies=utilities.get_featured_movies(),
genre_urls=utilities.get_genres_and_urls())
def movies_by_genre():
movies_per_page = 3
# Read query parameters.
genre_name = request.args.get('genre')
cursor = request.args.get('cursor')
movie_to_show_reviews = request.args.get('view_reviews_for')
if movie_to_show_reviews is None:
# No view-reviews query parameter, so set to a non-existent movie rank.
movie_to_show_reviews = 0
else:
# Convert movie_to_show_reviews from string to int.
movie_to_show_reviews = int(movie_to_show_reviews)
if cursor is None:
# No cursor query parameter, so initialise cursor to start at the beginning.
cursor = 0
else:
# Convert cursor from string to int.
cursor = int(cursor)
# Retrieve movie ranks for movies that have genre genre_name.
movie_ranks = services.get_movie_ranks_for_genre(genre_name,
repo.repo_instance)
# Retrieve the batch of movies to display on the web page.
movies = services.get_movies_by_rank(
movie_ranks[cursor:cursor + movies_per_page], repo.repo_instance)
first_movie_url = None
last_movie_url = None
next_movie_url = None
prev_movie_url = None
if cursor > 0:
# There are preceding movies, so generate URLs for the 'previous' and 'first' navigation buttons.
prev_movie_url = url_for('movies_bp.movies_by_genre',
genre=genre_name,
cursor=cursor - movies_per_page)
first_movie_url = url_for('movies_bp.movies_by_genre',
genre=genre_name)
if cursor + movies_per_page < len(movie_ranks):
# There are further movies, so generate URLs for the 'next' and 'last' navigation buttons.
next_movie_url = url_for('movies_bp.movies_by_genre',
genre=genre_name,
cursor=cursor + movies_per_page)
last_cursor = movies_per_page * int(len(movie_ranks) / movies_per_page)
if len(movie_ranks) % movies_per_page == 0:
last_cursor -= movies_per_page
last_movie_url = url_for('movies_bp.movies_by_genre',
genre=genre_name,
cursor=last_cursor)
# Construct urls for viewing movie reviews and adding reviews.
for movie in movies:
movie['view_review_url'] = url_for('movies_bp.movies_by_genre',
genre=genre_name,
cursor=cursor,
view_reviews_for=movie['rank'])
movie['add_review_url'] = url_for('movies_bp.review_on_movie',
movie=movie['rank'])
movie['reviews'] = services.get_reviews_for_movie(
movie['rank'], repo.repo_instance)
# Generate the webpage to display the movies.
return render_template('movies/movies.html',
title='Movies',
movies_title='Movies with genre ' + genre_name,
movies=movies,
featured_movies=utilities.get_featured_movies(3),
genre_urls=utilities.get_genres_and_urls(),
first_movie_url=first_movie_url,
last_movie_url=last_movie_url,
prev_movie_url=prev_movie_url,
next_movie_url=next_movie_url,
show_reviews_for_movie=movie_to_show_reviews)
def home():
return render_template(
'home/home.html',
featured_movies=utilities.get_featured_movies(),
genre_urls=utilities.get_genres_and_urls()
)