Add email confirmation

app/auth/views.py

@@ -36,15 +36,32 @@ def register():
         return redirect(url_for('main.index'))
     form = RegistrationForm()
     if form.validate_on_submit():
-        user = User(email=form.email.data, username=form.username.data,
+        user = User(email=form.email.data.lower(),
+                    username=form.username.data,
                     password=form.password.data)
         db.session.add(user)
         db.session.commit()
-        flash('Successfully registered! You can now login.')
+        token = user.generate_confirmation_token()
+        send_email(user.email, 'Confirm Your Account',
+                   'auth/email/confirm', user=user, token=token)
+        flash('A confirmation email has been sent to you by email.')
         return redirect(url_for('auth.login'))
     return render_template('auth/register.html.j2', form=form)
 
 
+@auth.route('/confirm/<token>')
+@login_required
+def confirm(token):
+    if current_user.confirmed:
+        return redirect(url_for('main.index'))
+    if current_user.confirm(token):
+        db.session.commit()
+        flash('You have confirmed your account. Thanks!')
+    else:
+        flash('The confirmation link is invalid or has expired.')
+    return redirect(url_for('main.index'))
+
+
 @auth.route('/reset', methods=['GET', 'POST'])
 def password_reset_request():
     if not current_user.is_anonymous: