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 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)
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 create():
if request.method == 'POST':
title = request.form['title']
body = request.form['body']
error = None
if not title:
error = 'Title is required.'
if error:
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 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 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():
error = 'User {} is already registered.'.format(username)
if not error:
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'))