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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
#
# 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/>.
from mediagoblin.tools.mail import send_email
from mediagoblin.tools.template import render_template
from mediagoblin import mg_globals


EMAIL_VERIFICATION_TEMPLATE = (
    u"http://{host}{uri}?"
    u"userid={userid}&token={verification_key}")


def send_verification_email(user, request):
    """
    Send the verification email to users to activate their accounts.

    Args:
    - user: a user object
    - request: the request
    """
    rendered_email = render_template(
        request, 'mediagoblin/auth/verification_email.txt',
        {'username': user.username,
         'verification_url': EMAIL_VERIFICATION_TEMPLATE.format(
                host=request.host,
                uri=request.urlgen('mediagoblin.auth.verify_email'),
                userid=unicode(user.id),
                verification_key=user.verification_key)})

    # TODO: There is no error handling in place
    send_email(
        mg_globals.app_config['email_sender_address'],
        [user.email],
        # TODO
        # Due to the distributed nature of GNU MediaGoblin, we should
        # find a way to send some additional information about the
        # specific GNU MediaGoblin instance in the subject line. For
        # example "GNU MediaGoblin @ Wandborg - [...]".
        'GNU MediaGoblin - Verify your email!',
        rendered_email)


EMAIL_FP_VERIFICATION_TEMPLATE = (
    u"http://{host}{uri}?"
    u"userid={userid}&token={fp_verification_key}")


def send_fp_verification_email(user, request):
    """
    Send the verification email to users to change their password.

    Args:
    - user: a user object
    - request: the request
    """
    rendered_email = render_template(
        request, 'mediagoblin/auth/fp_verification_email.txt',
        {'username': user.username,
         'verification_url': EMAIL_FP_VERIFICATION_TEMPLATE.format(
                host=request.host,
                uri=request.urlgen('mediagoblin.plugins.basic_auth.verify_forgot_password'),
                userid=unicode(user.id),
                fp_verification_key=user.fp_verification_key)})

    # TODO: There is no error handling in place
    send_email(
        mg_globals.app_config['email_sender_address'],
        [user.email],
        'GNU MediaGoblin - Change forgotten password!',
        rendered_email)