def update(pid):
''''Update a post if the current user is the author.'''
post = get_post(pid)
if request.method == 'POST':
title = request.form['title']
body = request.form['body']
error = None
if not title:
error = 'Title is required.'
if error is not None:
flash(error)
else:
query = 'UPDATE post SET title = ?, body = ? WHERE id = ?'
dbinfo = getdbinfo()
db = get_db()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
db.execute(query, (title, body, pid))
db.commit()
return redirect(url_for('blog.index'))
return render_template('blog/update.html', post=post)
def get_post(pid, check_author=True):
'''Get a post and its author by id.
Checks that the id exists and optionally that the current user is
the author.
:param pid: id of post to get
:param check_author: require the current user to be the author
:return: the post with author information
:raise 404: if a post with the given id doesn't exist
:raise 403: if the current user isn't the author
'''
query = 'SELECT p.id, title, body, created, author_id, username' \
' FROM post p JOIN user u ON p.author_id = u.id' \
' WHERE p.id = ?'
dbinfo = getdbinfo()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
post = get_db().execute(query, (pid, )).fetchone()
if post is None:
abort(404, "Post id {0} doesn't exist.".format(pid))
if check_author and post['author_id'] != g.user['id']:
abort(403)
return post
def create():
'''Create a new post for the current user.'''
if request.method == "POST":
title = request.form["title"]
body = request.form["body"]
error = None
if not title:
error = "Title is required."
if error is not None:
flash(error)
else:
query = "INSERT INTO post (title, body, author_id)" \
" VALUES (?, ?, ?)"
dbinfo = getdbinfo()
db = get_db()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
db.execute(
query,
(title, body, g.user["id"]),
)
db.commit()
inform_editors()
return redirect(url_for("blog.index"))
return render_template("blog/create.html")
def login():
"""Log in a registered user by adding the user id to the session."""
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
db = get_db()
error = None
sdk = getsdk()
query = 'SELECT * FROM user WHERE username = ?'
dbinfo = getdbinfo()
with dbinfo:
with sdk.trace_sql_database_request(dbinfo, query):
user = db.execute(query, (username, )).fetchone()
if user is None:
error = 'Incorrect username.'
elif not check_password_hash(user['password'], password):
error = 'Incorrect password.'
if error is None:
# store the user id in a new session and return to the index
session.clear()
session['user_id'] = user['id']
return redirect(url_for('index'))
flash(error)
return render_template('auth/login.html')
def register():
"""Register a new user.
Validates that the username is not already taken. Hashes the
password for security.
"""
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
db = get_db()
error = None
if not username:
error = 'Username is required.'
elif not password:
error = 'Password is required.'
elif db.execute('SELECT id FROM user WHERE username = ?',
(username, )).fetchone() is not None:
error = 'User {0} is already registered.'.format(username)
if error is None:
query = 'INSERT INTO user (username, password) VALUES (?, ?)'
dbinfo = getdbinfo()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
# the name is available, store it in the database and go to
# the login page
db.execute(query,
(username, generate_password_hash(password)))
db.commit()
return redirect(url_for('auth.login'))
flash(error)
return render_template('auth/register.html')
def delete(pid):
''' Delete a Post '''
dbinfo = getdbinfo()
query = "DELETE FROM post WHERE id = ?"
get_post(pid)
db = get_db()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
db.execute(query, (pid, ))
db.commit()
return redirect(url_for("blog.index"))
def index():
''' Create the Post Index '''
query = "SELECT p.id, title, body, created, author_id, username" \
" FROM post p JOIN user u ON p.author_id = u.id" \
" ORDER BY created DESC"
dbinfo = getdbinfo()
with dbinfo:
with getsdk().trace_sql_database_request(dbinfo, query):
# Show all the posts, most recent first.
db = get_db()
posts = db.execute(query).fetchall()
return render_template("blog/index.html", posts=posts)
def load_logged_in_user():
"""If a user id is stored in the session, load the user object from
the database into ``g.user``."""
user_id = session.get('user_id')
if user_id is None:
g.user = None
else:
sdk = getsdk()
query = 'SELECT * FROM user WHERE id = ?'
dbinfo = getdbinfo()
with dbinfo:
with sdk.trace_sql_database_request(dbinfo, query):
g.user = get_db().execute(query, (user_id, )).fetchone()
