from django.db import models from ordered_model.models import OrderedModel from django.utils.translation import ugettext_lazy as _ from django.utils import timezone from core.models import User, Group class Election(models.Model): """ This class allows to create a new election """ title = models.CharField(_('title'), max_length=255) description = models.TextField(_('description'), null=True, blank=True) start_candidature = models.DateTimeField(_('start candidature'), blank=False) end_candidature = models.DateTimeField(_('end candidature'), blank=False) start_date = models.DateTimeField(_('start date'), blank=False) end_date = models.DateTimeField(_('end date'), blank=False) edit_groups = models.ManyToManyField( Group, related_name="editable_elections", verbose_name=_("edit groups"), blank=True) view_groups = models.ManyToManyField( Group, related_name="viewable_elections", verbose_name=_("view groups"), blank=True) vote_groups = models.ManyToManyField( Group, related_name="votable_elections", verbose_name=_("vote groups"), blank=True) candidature_groups = models.ManyToManyField( Group, related_name="candidate_elections", verbose_name=_("candidature groups"), blank=True) voters = models.ManyToManyField(User, verbose_name=('voters'), related_name='voted_elections') archived = models.BooleanField(_("archived"), default=False) def __str__(self): return self.title @property def is_vote_active(self): now = timezone.now() return bool(now <= self.end_date and now >= self.start_date) @property def is_vote_finished(self): return bool(timezone.now() > self.end_date) @property def is_candidature_active(self): now = timezone.now() return bool(now <= self.end_candidature and now >= self.start_candidature) @property def is_vote_editable(self): return bool(timezone.now() <= self.end_candidature) def can_candidate(self, user): for group in self.candidature_groups.all(): if user.is_in_group(group): return True return False def can_vote(self, user): if not self.is_vote_active or self.has_voted(user): return False for group in self.vote_groups.all(): if user.is_in_group(group): return True return False def has_voted(self, user): return self.voters.filter(id=user.id).exists() @property def results(self): results = {} total_vote = self.voters.count() for role in self.roles.all(): results[role.title] = role.results(total_vote) return results def delete(self): for election_list in self.election_lists.all(): election_list.delete() super(Election, self).delete() # Permissions class Role(OrderedModel): """ This class allows to create a new role avaliable for a candidature """ election = models.ForeignKey(Election, related_name='roles', verbose_name=_("election")) title = models.CharField(_('title'), max_length=255) description = models.TextField(_('description'), null=True, blank=True) max_choice = models.IntegerField(_('max choice'), default=1) def results(self, total_vote): results = {} total_vote *= self.max_choice non_blank = 0 for candidature in self.candidatures.all(): cand_results = {} cand_results['vote'] = self.votes.filter(candidature=candidature).count() if total_vote == 0: cand_results['percent'] = 0 else: cand_results['percent'] = cand_results['vote'] * 100 / total_vote non_blank += cand_results['vote'] results[candidature.user.username] = cand_results results['total vote'] = total_vote if total_vote == 0: results['blank vote'] = {'vote': 0, 'percent': 0} else: results['blank vote'] = {'vote': total_vote - non_blank, 'percent': (total_vote - non_blank) * 100 / total_vote} return results @property def edit_groups(self): return self.election.edit_groups def __str__(self): return ("%s : %s") % (self.election.title, self.title) class ElectionList(models.Model): """ To allow per list vote """ title = models.CharField(_('title'), max_length=255) election = models.ForeignKey(Election, related_name='election_lists', verbose_name=_("election")) def can_be_edited_by(self, user): return user.can_edit(self.election) def delete(self): for candidature in self.candidatures.all(): candidature.delete() super(ElectionList, self).delete() def __str__(self): return self.title class Candidature(models.Model): """ This class is a component of responsability """ role = models.ForeignKey(Role, related_name='candidatures', verbose_name=_("role")) user = models.ForeignKey(User, verbose_name=_('user'), related_name='candidates', blank=True) program = models.TextField(_('description'), null=True, blank=True) election_list = models.ForeignKey(ElectionList, related_name='candidatures', verbose_name=_('election list')) def delete(self): for vote in self.votes.all(): vote.delete() super(Candidature, self).delete() def can_be_edited_by(self, user): return (user == self.user) or user.can_edit(self.role.election) def __str__(self): return "%s : %s" % (self.role.title, self.user.username) class Vote(models.Model): """ This class allows to vote for candidates """ role = models.ForeignKey(Role, related_name='votes', verbose_name=_("role")) candidature = models.ManyToManyField(Candidature, related_name='votes', verbose_name=_("candidature")) def __str__(self): return "Vote"