mediagoblin/mediagoblin/auth/views.py

# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import uuid

from webob import exc

from mediagoblin.util import render_to_response
from mediagoblin.db.util import ObjectId
from mediagoblin.auth import lib as auth_lib
from mediagoblin.auth import forms as auth_forms
from mediagoblin.auth.lib import send_verification_email


def register(request):
    """
    Your classic registration view!
    """
    register_form = auth_forms.RegistrationForm(request.POST)

    if request.method == 'POST' and register_form.validate():
        # TODO: Make sure the user doesn't exist already

        users_with_username = \
            request.db.User.find({
                'username': request.POST['username'].lower()
            }).count()

        if users_with_username:
            register_form.username.errors.append(
                u'Sorry, a user with that name already exists.')

        else:
            # Create the user
            entry = request.db.User()
            entry['username'] = request.POST['username'].lower()
            entry['email'] = request.POST['email']
            entry['pw_hash'] = auth_lib.bcrypt_gen_password_hash(
                request.POST['password'])
            entry.save(validate=True)
            
            send_verification_email(entry, request)

            # Redirect to register_success
            return exc.HTTPFound(
                location=request.urlgen("mediagoblin.auth.register_success"))

    # render
    return render_to_response(
            request, 'mediagoblin/auth/register.html',
            {'register_form': register_form})


def register_success(request):
    return render_to_response(
            request, 'mediagoblin/auth/register_success.html', {})


def login(request):
    """
    MediaGoblin login view.

    If you provide the POST with 'next', it'll redirect to that view.
    """
    login_form = auth_forms.LoginForm(request.POST)

    login_failed = False

    if request.method == 'POST' and login_form.validate():
        user = request.db.User.one(
            {'username': request.POST['username'].lower()})

        if user and user.check_login(request.POST['password']):
            # set up login in session
            request.session['user_id'] = unicode(user['_id'])
            request.session.save()

            if request.POST.get('next'):
                return exc.HTTPFound(location=request.POST['next'])
            else:
                return exc.HTTPFound(
                    location=request.urlgen("index"))

        else:
            # Prevent detecting who's on this system by testing login
            # attempt timings
            auth_lib.fake_login_attempt()
            login_failed = True

    # render
    return render_to_response(
            request, 'mediagoblin/auth/login.html',
            {'login_form': login_form,
             'next': request.GET.get('next') or request.POST.get('next'),
             'login_failed': login_failed})


def logout(request):
    # Maybe deleting the user_id parameter would be enough?
    request.session.delete()
    
    return exc.HTTPFound(
        location=request.urlgen("index"))


def verify_email(request):
    """
    Email verification view

    validates GET parameters against database and unlocks the user account, if
    you are lucky :)
    """
    # If we don't have userid and token parameters, we can't do anything; 404
    if not request.GET.has_key('userid') or not request.GET.has_key('token'):
        return exc.HTTPNotFound()

    user = request.db.User.find_one(
        {'_id': ObjectId(unicode(request.GET['userid']))})

    if user and user['verification_key'] == unicode(request.GET['token']):
        user['status'] = u'active'
        user['email_verified'] = True
        verification_successful = True
        user.save()
    else:
        verification_successful = False
        
    return render_to_response(
            request, 'mediagoblin/auth/verify_email.html',
            {'user': user,
             'verification_successful': verification_successful})

def verify_email_notice(request):
    """
    Verify warning view.

    When the user tries to do some action that requires their account
    to be verified beforehand, this view is called upon!
    """
    return render_to_response(
            request, 'mediagoblin/auth/verification_needed.html', {})


def resend_activation(request):
    """
    The reactivation view

    Resend the activation email.
    """

    request.user['verification_key'] = unicode(uuid.uuid4())
    request.user.save()

    send_verification_email(request.user, request)

    return exc.HTTPFound(
        location=request.urlgen('mediagoblin.auth.resend_verification_success'))


def resend_activation_success(request):
    return render_to_response(
            request, 'mediagoblin/auth/resent_verification_email.html', {})