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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/>.
import wtforms
from mediagoblin.tools.mail import normalize_email
from mediagoblin.tools.translate import lazy_pass_to_ugettext as _
def normalize_user_or_email_field(allow_email=True, allow_user=True):
"""
Check if we were passed a field that matches a username and/or email
pattern.
This is useful for fields that can take either a username or email
address. Use the parameters if you want to only allow a username for
instance"""
message = _(u'Invalid User name or email address.')
nomail_msg = _(u"This field does not take email addresses.")
nouser_msg = _(u"This field requires an email address.")
def _normalize_field(form, field):
email = u'@' in field.data
if email: # normalize email address casing
if not allow_email:
raise wtforms.ValidationError(nomail_msg)
wtforms.validators.Email()(form, field)
field.data = normalize_email(field.data)
else: # lower case user names
if not allow_user:
raise wtforms.ValidationError(nouser_msg)
wtforms.validators.Length(min=3, max=30)(form, field)
wtforms.validators.Regexp(r'^\w+$')(form, field)
field.data = field.data.lower()
if field.data is None: # should not happen, but be cautious anyway
raise wtforms.ValidationError(message)
return _normalize_field
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