OpenSlides/openslides/assignment/models.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.assignment.models
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Models for the assignment app.
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:copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
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:license: GNU GPL, see LICENSE for more details.
"""
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from django.core.urlresolvers import reverse
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from django.db import models
from django.dispatch import receiver
from django.utils.translation import ugettext_lazy as _, ugettext_noop
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from openslides.utils.person import PersonField
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from openslides.config.models import config
from openslides.config.signals import default_config_value
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from openslides.projector.api import register_slidemodel
from openslides.projector.projector import SlideMixin
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from openslides.poll.models import (BasePoll, CountInvalid, CountVotesCast,
BaseOption, PublishPollMixin, BaseVote)
from openslides.agenda.models import Item
class AssignmentCandidate(models.Model):
assignment = models.ForeignKey("Assignment")
person = PersonField(db_index=True)
elected = models.BooleanField(default=False)
blocked = models.BooleanField(default=False)
def __unicode__(self):
return unicode(self.person)
class Meta:
unique_together = ("assignment", "person")
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class Assignment(models.Model, SlideMixin):
prefix = 'assignment'
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STATUS = (
('sea', _('Searching for candidates')),
('vot', _('Voting')),
('fin', _('Finished')),
)
name = models.CharField(max_length=100, verbose_name=_("Name"))
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description = models.TextField(null=True, blank=True,
verbose_name=_("Description"))
posts = models.PositiveSmallIntegerField(
verbose_name=_("Number of available posts"))
polldescription = models.CharField(max_length=100, null=True, blank=True,
verbose_name=_("Comment on the ballot paper"))
status = models.CharField(max_length=3, choices=STATUS, default='sea')
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def set_status(self, status):
error = True
for a, b in Assignment.STATUS:
if status == a:
error = False
break
if error:
raise NameError(_('%s is not a valid status.') % status)
if self.status == status:
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raise NameError(_('The assignment status is already %s.')
% self.status)
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self.status = status
self.save()
def run(self, candidate, person=None):
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"""
run for a vote
candidate: The user who will be a candidate
person: The user who chooses the candidate
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"""
# TODO: don't make any permission checks here.
# Use other Exceptions
if self.is_candidate(candidate):
raise NameError(_('<b>%s</b> is already a candidate.') % candidate)
if not person.has_perm("assignment.can_manage_assignment") and self.status != 'sea':
raise NameError(_('The candidate list is already closed.'))
candidation = self.assignment_candidats.filter(person=candidate)
if candidation and candidate != person and \
not person.has_perm("assignment.can_manage_assignment"):
# if the candidation is blocked and anotherone tries to run the
# candidate
raise NameError(
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_('%s does not want to be a candidate.') % candidate)
elif candidation:
candidation[0].blocked = False
candidation[0].save()
else:
AssignmentCandidate(assignment=self, person=candidate).save()
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def delrun(self, candidate, blocked=True):
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"""
stop running for a vote
"""
try:
candidation = self.assignment_candidats.get(person=candidate)
except AssignmentCandidate.DoesNotExist:
# TODO: Use an OpenSlides Error
raise Exception(_('%s is no candidate') % candidate)
if not candidation.blocked:
if blocked:
candidation.blocked = True
candidation.save()
else:
candidation.delete()
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else:
candidation.delete()
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def is_candidate(self, person):
"""
return True, if person is a candidate.
"""
try:
return self.assignment_candidats.filter(person=person) \
.exclude(blocked=True).exists()
except AttributeError:
return False
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def is_blocked(self, person):
"""
return True, if the person is blockt for candidation.
"""
return self.assignment_candidats.filter(person=person) \
.filter(blocked=True).exists()
@property
def assignment_candidats(self):
return AssignmentCandidate.objects.filter(assignment=self)
@property
def candidates(self):
return self.get_participants(only_candidate=True)
@property
def elected(self):
return self.get_participants(only_elected=True)
def get_participants(self, only_elected=False, only_candidate=False):
candidates = self.assignment_candidats.exclude(blocked=True)
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assert not (only_elected and only_candidate)
if only_elected:
candidates = candidates.filter(elected=True)
if only_candidate:
candidates = candidates.filter(elected=False)
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participants = []
for candidate in candidates.all():
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participants.append(candidate.person)
return participants
#return candidates.values_list('person', flat=True)
def set_elected(self, person, value=True):
candidate = self.assignment_candidats.get(person=person)
candidate.elected = value
candidate.save()
def is_elected(self, person):
return person in self.elected
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def gen_poll(self):
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poll = AssignmentPoll(assignment=self)
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poll.save()
poll.set_options([{'candidate': person} for person in self.candidates])
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return poll
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def vote_results(self, only_published):
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"""
returns a table represented as a list with all candidates from all
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related polls and their vote results.
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"""
vote_results_dict = {}
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# All polls related to this assigment
polls = self.poll_set.all()
if only_published:
polls = polls.filter(published=True)
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# All PollOption-Objects related to this assignment
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options = []
for poll in polls:
options += poll.get_options()
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for option in options:
candidate = option.candidate
if candidate in vote_results_dict:
continue
vote_results_dict[candidate] = []
for poll in polls:
votes = {}
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try:
# candidate related to this poll
poll_option = poll.get_options().get(candidate=candidate)
for vote in poll_option.get_votes():
votes[vote.value] = vote.print_weight()
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except AssignmentOption.DoesNotExist:
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# candidate not in related to this poll
votes = None
vote_results_dict[candidate].append(votes)
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return vote_results_dict
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def get_agenda_title(self):
return self.name
def delete(self):
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# Remove any Agenda-Item, which is related to this assignment.
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for item in Item.objects.filter(related_sid=self.sid):
item.delete()
super(Assignment, self).delete()
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def slide(self):
"""
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return the slide dict
"""
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data = super(Assignment, self).slide()
data['assignment'] = self
data['title'] = self.name
data['polls_available'] = self.poll_set.exists()
data['polls'] = self.poll_set.filter(published=True)
data['vote_results'] = self.vote_results(only_published=True)
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data['assignment_publish_winner_results_only'] = \
config['assignment_publish_winner_results_only']
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data['template'] = 'projector/Assignment.html'
return data
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def get_absolute_url(self, link='view'):
if link == 'view':
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return reverse('assignment_view', args=[str(self.id)])
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if link == 'edit':
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return reverse('assignment_edit', args=[str(self.id)])
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if link == 'delete':
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return reverse('assignment_delete', args=[str(self.id)])
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def __unicode__(self):
return self.name
class Meta:
permissions = (
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('can_see_assignment', ugettext_noop("Can see assignment")),
('can_nominate_other',
ugettext_noop("Can nominate another person")),
('can_nominate_self', ugettext_noop("Can nominate themselves")),
('can_manage_assignment', ugettext_noop("Can manage assignment")),
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)
ordering = ('name',)
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register_slidemodel(Assignment)
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class AssignmentVote(BaseVote):
option = models.ForeignKey('AssignmentOption')
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class AssignmentOption(BaseOption):
poll = models.ForeignKey('AssignmentPoll')
candidate = PersonField()
vote_class = AssignmentVote
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def __unicode__(self):
return unicode(self.candidate)
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class AssignmentPoll(BasePoll, CountInvalid, CountVotesCast, PublishPollMixin):
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option_class = AssignmentOption
assignment = models.ForeignKey(Assignment, related_name='poll_set')
yesnoabstain = models.NullBooleanField()
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def get_assignment(self):
return self.assignment
def get_vote_values(self):
if self.yesnoabstain is None:
if config['assignment_poll_vote_values'] == 'votes':
self.yesnoabstain = False
elif config['assignment_poll_vote_values'] == 'yesnoabstain':
self.yesnoabstain = True
else:
# candidates <= available posts -> yes/no/abstain
if self.assignment.assignment_candidats.filter(elected=False).count() <= (self.assignment.posts):
self.yesnoabstain = True
else:
self.yesnoabstain = False
self.save()
if self.yesnoabstain:
return [ugettext_noop('Yes'), ugettext_noop('No'),
ugettext_noop('Abstain')]
else:
return [ugettext_noop('Votes')]
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def append_pollform_fields(self, fields):
CountInvalid.append_pollform_fields(self, fields)
CountVotesCast.append_pollform_fields(self, fields)
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def get_ballot(self):
return self.assignment.poll_set.filter(id__lte=self.id).count()
@models.permalink
def get_absolute_url(self, link='view'):
if link == 'view':
return ('assignment_poll_view', [str(self.id)])
if link == 'delete':
return ('assignment_poll_delete', [str(self.id)])
def __unicode__(self):
return _("Ballot %d") % self.get_ballot()
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@receiver(default_config_value, dispatch_uid="assignment_default_config")
def default_config(sender, key, **kwargs):
return {
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'assignment_publish_winner_results_only': False,
'assignment_pdf_ballot_papers_selection': 'CUSTOM_NUMBER',
'assignment_pdf_ballot_papers_number': '8',
'assignment_pdf_title': _('Elections'),
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'assignment_pdf_preamble': '',
'assignment_poll_vote_values': 'auto',
}.get(key)