def load_logged_in_user():
user_id = session.get("user_id")
if user_id is None:
g.user = None
else:
g.user = get_db().execute("SELECT * FROM user WHERE id = ?",
(user_id, )).fetchone()
def get_post(id, check_author=True):
post = get_db().execute(
"SELECT p.id, title, body, created, author_id, username"
" FROM post p JOIN user u ON p.author_id = u.id"
" WHERE p.id = ?", (id, )).fetchone()
if post is None:
abort(404, "Post id {0} doesn't exist.".format(id))
if check_author and post['author_id'] != g.user['id']:
abort(403)
return post
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
db = get_db()
error = None
user = db.execute("SELECT * FROM user WHERE username = ?",
(username, )).fetchone()
if user is None:
error = "Incorrect username."
elif not check_password_hash(user['password'], password):
error = "Incorrect password."
if error is None:
session.clear()
session['user_id'] = user['id']
return redirect(url_for("index"))
flash(error)
return render_template("auth/login.html")
def update(id):
post = get_post(id)
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:
db = get_db()
db.execute("UPDATE post SET title = ?, body = ?"
" WHERE id = ?", (title, body, id))
db.commit()
return redirect(url_for('blog.index'))
return render_template("blog/update.html", post=post)
def create():
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:
db = get_db()
db.execute(
"INSERT INTO post (title, body, author_id)"
" VALUES (?, ?, ?)", (title, body, g.user['id']))
db.commit()
return redirect(url_for('blog.index'))
return render_template('blog/create.html')
def register():
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 {} is already registered.".format(username)
if error is None:
db.execute("INSERT INTO user (username, password) VALUES (?, ?)",
(username, generate_password_hash(password)))
db.commit()
return redirect(url_for("auth.login"))
flash(error)
return render_template("auth/register.html")
def delete(id):
get_post(id)
db = get_db()
db.execute('DELETE FROM post WHERE id = ?', (id, ))
db.commit()
return redirect(url_for('blog.index'))
def index():
db = get_db()
posts = db.execute("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").fetchall()
return render_template("blog/index.html", posts=posts)