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# Copyright 2011 GRNET S.A. All rights reserved.
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# 
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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# 
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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# 
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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# 
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# 
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import logging
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from datetime import tzinfo, timedelta
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from django.conf import settings
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from django.template import RequestContext
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from astakos.im.models import AstakosUser
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class UTC(tzinfo):
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   def utcoffset(self, dt):
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       return timedelta(0)
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   def tzname(self, dt):
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       return 'UTC'
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   def dst(self, dt):
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       return timedelta(0)
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def isoformat(d):
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   """Return an ISO8601 date string that includes a timezone."""
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   return d.replace(tzinfo=UTC()).isoformat()
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def get_or_create_user(username, realname='', first_name='', last_name='', affiliation='', level=0, provider='local', password='', email=''):
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    """Find or register a user into the internal database
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       and issue a token for subsequent requests.
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    """
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    user, created = AstakosUser.objects.get_or_create(username=username,
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        defaults={
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            'is_active': False,
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            'password':password,
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            'email':email,
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            'affiliation':affiliation,
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            'level':level,
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            'invitations':settings.INVITATIONS_PER_LEVEL[level],
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            'provider':provider,
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            'realname':realname,
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            'first_name':first_name,
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            'last_name':last_name
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        })
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    if created:
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        user.renew_token()
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        user.save()
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        logging.info('Created user %s', user)
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    return user
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def get_context(request, extra_context={}, **kwargs):
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    if not extra_context:
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        extra_context = {}
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    extra_context.update(kwargs)
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    return RequestContext(request, extra_context)