OpenSlides/openslides/assignment/models.py

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from django.contrib.contenttypes.models import ContentType
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from django.core.urlresolvers import reverse
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from django.db import models
from django.utils.datastructures import SortedDict
from django.utils.translation import ugettext as _
from django.utils.translation import ugettext_lazy, ugettext_noop
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from openslides.agenda.models import Item, Speaker
from openslides.config.api import config
from openslides.poll.models import (BaseOption, BasePoll, BaseVote,
CollectDefaultVotesMixin,
PublishPollMixin)
from openslides.projector.api import get_active_object, update_projector
from openslides.projector.models import RelatedModelMixin, SlideMixin
from openslides.utils.exceptions import OpenSlidesError
from openslides.utils.models import AbsoluteUrlMixin
from openslides.utils.utils import html_strong
from openslides.users.models import User
class AssignmentCandidate(RelatedModelMixin, models.Model):
"""
Many2Many table between an assignment and the candidates.
"""
assignment = models.ForeignKey("Assignment")
person = models.ForeignKey(User, db_index=True)
elected = models.BooleanField(default=False)
blocked = models.BooleanField(default=False)
class Meta:
unique_together = ("assignment", "person")
def __str__(self):
return str(self.person)
def get_related_model(self):
"""
Returns the assignment
"""
return self.assignment
class Assignment(SlideMixin, AbsoluteUrlMixin, models.Model):
slide_callback_name = 'assignment'
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STATUS = (
('sea', ugettext_lazy('Searching for candidates')),
('vot', ugettext_lazy('Voting')),
('fin', ugettext_lazy('Finished')),
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)
name = models.CharField(max_length=100, verbose_name=ugettext_lazy("Name"))
description = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Description"))
posts = models.PositiveSmallIntegerField(verbose_name=ugettext_lazy("Number of available posts"))
poll_description_default = models.CharField(
max_length=79, null=True, blank=True,
verbose_name=ugettext_lazy("Default comment on the ballot paper"))
status = models.CharField(max_length=3, choices=STATUS, default='sea')
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class Meta:
permissions = (
('can_see_assignment', ugettext_noop('Can see elections')), # TODO: Add plural s to the codestring
('can_nominate_other', ugettext_noop('Can nominate another person')),
('can_nominate_self', ugettext_noop('Can nominate oneself')),
('can_manage_assignment', ugettext_noop('Can manage elections')), # TODO: Add plural s also to the codestring
)
ordering = ('name',)
verbose_name = ugettext_noop('Election')
def __str__(self):
return self.name
def get_absolute_url(self, link='detail'):
if link == 'detail':
url = reverse('assignment_detail', args=[str(self.pk)])
elif link == 'update':
url = reverse('assignment_update', args=[str(self.pk)])
elif link == 'delete':
url = reverse('assignment_delete', args=[str(self.pk)])
else:
url = super(Assignment, self).get_absolute_url(link)
return url
def get_slide_context(self, **context):
context.update({
'polls': self.poll_set.filter(published=True),
'vote_results': self.vote_results(only_published=True)})
return super(Assignment, self).get_slide_context(**context)
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def set_status(self, status):
status_dict = dict(self.STATUS)
if status not in status_dict:
raise ValueError(_('%s is not a valid status.') % html_strong(status))
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if self.status == status:
raise ValueError(
_('The election status is already %s.') % html_strong(status_dict[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.'))
candidature = self.assignment_candidates.filter(person=candidate)
if candidature and candidate != person and \
not person.has_perm("assignment.can_manage_assignment"):
# if the candidature 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 candidature:
candidature[0].blocked = False
candidature[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:
candidature = self.assignment_candidates.get(person=candidate)
except AssignmentCandidate.DoesNotExist:
raise Exception(_('%s is no candidate') % candidate)
if not candidature.blocked:
if blocked:
candidature.blocked = True
candidature.save()
else:
candidature.delete()
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else:
candidature.delete()
def is_candidate(self, person):
"""
return True, if person is a candidate.
"""
try:
return self.assignment_candidates.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 candidature.
"""
return self.assignment_candidates.filter(person=person).filter(blocked=True).exists()
@property
def assignment_candidates(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_candidates.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)
# TODO: rewrite this with a queryset
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participants = []
for candidate in candidates.all():
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participants.append(candidate.person)
return participants
def set_elected(self, person, value=True):
candidate = self.assignment_candidates.get(person=person)
candidate.elected = value
candidate.save()
# update projector if assignment or assignmentpoll slide is active
active_object = get_active_object()
if (type(active_object) is type(self) and active_object.pk == self.pk) or \
(type(active_object) is AssignmentPoll and active_object.assignment_id == self.pk):
update_projector()
def is_elected(self, person):
return person in self.elected
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def gen_poll(self):
"""
Creates an new poll for the assignment and adds all candidates to all
lists of speakers of related agenda items.
"""
if config['assignment_poll_vote_values'] == 'votes':
yesnoabstain = False
elif config['assignment_poll_vote_values'] == 'yesnoabstain':
yesnoabstain = True
else:
# config['assignment_poll_vote_values'] == 'auto'
# candidates <= available posts -> yes/no/abstain
if len(self.candidates) <= (self.posts - len(self.elected)):
yesnoabstain = True
else:
yesnoabstain = False
poll = AssignmentPoll.objects.create(
assignment=self,
description=self.poll_description_default,
yesnoabstain=yesnoabstain)
poll.set_options([{'candidate': person} for person in self.candidates])
items = Item.objects.filter(content_type=ContentType.objects.get_for_model(Assignment), object_id=self.pk)
for item in items:
someone_added = None
for candidate in self.candidates:
try:
someone_added = Speaker.objects.add(candidate, item)
except OpenSlidesError:
# The Speaker is already on the list. Do nothing.
# TODO: Find a smart way not to catch the error concerning AnonymousUser.
pass
if someone_added is not None:
someone_added.check_and_update_projector()
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return poll
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 = SortedDict()
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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 get_agenda_title_supplement(self):
return '(%s)' % _('Assignment')
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class AssignmentVote(BaseVote):
option = models.ForeignKey('AssignmentOption')
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class AssignmentOption(BaseOption):
poll = models.ForeignKey('AssignmentPoll')
candidate = models.ForeignKey(User)
vote_class = AssignmentVote
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def __str__(self):
return str(self.candidate)
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class AssignmentPoll(SlideMixin, RelatedModelMixin, CollectDefaultVotesMixin,
PublishPollMixin, AbsoluteUrlMixin, BasePoll):
slide_callback_name = 'assignmentpoll'
"""Name of the callback for the slide system."""
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option_class = AssignmentOption
assignment = models.ForeignKey(Assignment, related_name='poll_set')
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yesnoabstain = models.BooleanField(default=False)
description = models.CharField(
max_length=79, null=True, blank=True,
verbose_name=ugettext_lazy("Comment on the ballot paper"))
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def __str__(self):
return _("Ballot %d") % self.get_ballot()
def get_absolute_url(self, link='update'):
"""
Return an URL for the poll.
The keyargument 'link' can be 'update' or 'delete'.
"""
if link == 'update':
url = reverse('assignmentpoll_update', args=[str(self.pk)])
elif link == 'delete':
url = reverse('assignmentpoll_delete', args=[str(self.pk)])
else:
url = super(AssignmentPoll, self).get_absolute_url(link)
return url
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def get_assignment(self):
return self.assignment
def get_related_model(self):
return self.assignment
def get_vote_values(self):
if self.yesnoabstain:
return [ugettext_noop('Yes'), ugettext_noop('No'), ugettext_noop('Abstain')]
else:
return [ugettext_noop('Votes')]
def get_ballot(self):
return self.assignment.poll_set.filter(id__lte=self.id).count()
def get_percent_base_choice(self):
return config['assignment_poll_100_percent_base']
def append_pollform_fields(self, fields):
fields.append('description')
super(AssignmentPoll, self).append_pollform_fields(fields)
def get_slide_context(self, **context):
return super(AssignmentPoll, self).get_slide_context(poll=self)