from datetime import datetime from django.contrib.auth.models import AnonymousUser from django.contrib.contenttypes.fields import GenericForeignKey from django.contrib.contenttypes.models import ContentType from django.core.exceptions import ValidationError from django.db import models from django.utils.translation import ugettext as _ from django.utils.translation import ugettext_lazy, ugettext_noop from openslides.config.api import config from openslides.core.models import Tag from openslides.projector.models import SlideMixin from openslides.users.models import User from openslides.utils.exceptions import OpenSlidesError from openslides.utils.rest_api import RESTModelMixin from openslides.utils.utils import to_roman class Item(RESTModelMixin, SlideMixin, models.Model): """ An Agenda Item """ slide_callback_name = 'agenda' AGENDA_ITEM = 1 ORGANIZATIONAL_ITEM = 2 ITEM_TYPE = ( (AGENDA_ITEM, ugettext_lazy('Agenda item')), (ORGANIZATIONAL_ITEM, ugettext_lazy('Organizational item'))) item_number = models.CharField(blank=True, max_length=255, verbose_name=ugettext_lazy("Number")) """ Number of agenda item. """ title = models.CharField(null=True, max_length=255, verbose_name=ugettext_lazy("Title")) """ Title of the agenda item. """ text = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Text")) """ The optional text of the agenda item. """ comment = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Comment")) """ Optional comment to the agenda item. Will not be shoun to normal users. """ closed = models.BooleanField(default=False, verbose_name=ugettext_lazy("Closed")) """ Flag, if the item is finished. """ type = models.IntegerField(max_length=1, choices=ITEM_TYPE, default=AGENDA_ITEM, verbose_name=ugettext_lazy("Type")) """ Type of the agenda item. See Item.ITEM_TYPE for more information. """ duration = models.CharField(null=True, blank=True, max_length=5) """ The intended duration for the topic. """ parent = models.ForeignKey('self', null=True, blank=True, related_name='children') """ The parent item in the agenda tree. """ weight = models.IntegerField(default=0, verbose_name=ugettext_lazy("Weight")) """ Weight to sort the item in the agenda. """ content_type = models.ForeignKey(ContentType, null=True, blank=True) """ Field for generic relation to a related object. Type of the object. """ object_id = models.PositiveIntegerField(null=True, blank=True) """ Field for generic relation to a related object. Id of the object. """ content_object = GenericForeignKey() """ Field for generic relation to a related object. General field to the related object. """ speaker_list_closed = models.BooleanField( default=False, verbose_name=ugettext_lazy("List of speakers is closed")) """ True, if the list of speakers is closed. """ tags = models.ManyToManyField(Tag, blank=True) """ Tags to categorise agenda items. """ class Meta: permissions = ( ('can_see', ugettext_noop("Can see agenda")), ('can_manage', ugettext_noop("Can manage agenda")), ('can_see_orga_items', ugettext_noop("Can see orga items and time scheduling of agenda"))) def __str__(self): return self.get_title() def clean(self): """ Ensures that the children of orga items are only orga items. """ if (self.type == self.AGENDA_ITEM and self.parent is not None and self.parent.type == self.ORGANIZATIONAL_ITEM): raise ValidationError(_('Agenda items can not be child elements of an organizational item.')) if (self.type == self.ORGANIZATIONAL_ITEM and self.children.filter(type=self.AGENDA_ITEM).exists()): raise ValidationError(_('Organizational items can not have agenda items as child elements.')) return super().clean() def delete(self, with_children=False): """ Delete the Item. If with_children is True, all children of the item will be deleted as well. If with_children is False, all children will be children of the parent of the item. """ if not with_children: for child in self.children.all(): child.parent = self.parent child.save() super().delete() def get_title(self): """ Return the title of this item. """ if not self.content_object: agenda_title = self.title or "" else: try: agenda_title = self.content_object.get_agenda_title() except AttributeError: raise NotImplementedError('You have to provide a get_agenda_title ' 'method on your related model.') return '%s %s' % (self.item_no, agenda_title) if self.item_no else agenda_title def get_title_supplement(self): """ Return a supplement for the title. """ if not self.content_object: return '' try: return self.content_object.get_agenda_title_supplement() except AttributeError: raise NotImplementedError('You have to provide a get_agenda_title_supplement method on your related model.') def get_list_of_speakers(self, old_speakers_count=None, coming_speakers_count=None): """ Returns the list of speakers as a list of dictionaries. Each dictionary contains a prefix, the speaker and its type. Types are old_speaker, actual_speaker and coming_speaker. """ speaker_query = Speaker.objects.filter(item=self) # TODO: Why not self.speaker_set? list_of_speakers = [] # Parse old speakers old_speakers = speaker_query.exclude(begin_time=None).exclude(end_time=None).order_by('end_time') if old_speakers_count is None: old_speakers_count = old_speakers.count() last_old_speakers_count = max(0, old_speakers.count() - old_speakers_count) old_speakers = old_speakers[last_old_speakers_count:] for number, speaker in enumerate(old_speakers): prefix = old_speakers_count - number speaker_dict = { 'prefix': '-%d' % prefix, 'speaker': speaker, 'type': 'old_speaker', 'first_in_group': False, 'last_in_group': False} if number == 0: speaker_dict['first_in_group'] = True if number == old_speakers_count - 1: speaker_dict['last_in_group'] = True list_of_speakers.append(speaker_dict) # Parse actual speaker try: actual_speaker = speaker_query.filter(end_time=None).exclude(begin_time=None).get() except Speaker.DoesNotExist: pass else: list_of_speakers.append({ 'prefix': '0', 'speaker': actual_speaker, 'type': 'actual_speaker', 'first_in_group': True, 'last_in_group': True}) # Parse coming speakers coming_speakers = speaker_query.filter(begin_time=None).order_by('weight') if coming_speakers_count is None: coming_speakers_count = coming_speakers.count() coming_speakers = coming_speakers[:max(0, coming_speakers_count)] for number, speaker in enumerate(coming_speakers): speaker_dict = { 'prefix': number + 1, 'speaker': speaker, 'type': 'coming_speaker', 'first_in_group': False, 'last_in_group': False} if number == 0: speaker_dict['first_in_group'] = True if number == coming_speakers_count - 1: speaker_dict['last_in_group'] = True list_of_speakers.append(speaker_dict) return list_of_speakers def get_next_speaker(self): """ Returns the speaker object of the user who is next. """ try: return self.speaker_set.filter(begin_time=None).order_by('weight')[0] except IndexError: # The list of speakers is empty. return None def is_active_slide(self): """ Returns True if the slide is active. If the slide is a related item, Returns True if the related object is active. """ if super(Item, self).is_active_slide(): value = True elif self.content_object and isinstance(self.content_object, SlideMixin): value = self.content_object.is_active_slide() else: value = False return value @property def item_no(self): item_no = None if self.item_number: if config['agenda_number_prefix']: item_no = '%s %s' % (config['agenda_number_prefix'], self.item_number) else: item_no = str(self.item_number) return item_no def calc_item_no(self): """ Returns the number of this agenda item. """ if self.type == self.AGENDA_ITEM: if self.parent is None: sibling_no = self.sibling_no() if config['agenda_numeral_system'] == 'arabic': return str(sibling_no) else: # config['agenda_numeral_system'] == 'roman' return to_roman(sibling_no) else: return '%s.%s' % (self.parent.calc_item_no(), self.sibling_no()) else: return '' def sibling_no(self): """ Counts how many AGENDA_ITEMS with the same parent (siblings) have a smaller weight then this item. Returns this number + 1 or 0 when self is not an AGENDA_ITEM. """ return Item.objects.filter( parent=self.parent, type=self.AGENDA_ITEM, weight__lte=self.weight).count() class SpeakerManager(models.Manager): def add(self, user, item): if self.filter(user=user, item=item, begin_time=None).exists(): raise OpenSlidesError(_( '%(user)s is already on the list of speakers of item %(id)s.') % {'user': user, 'id': item.id}) if isinstance(user, AnonymousUser): raise OpenSlidesError( _('An anonymous user can not be on lists of speakers.')) weight = (self.filter(item=item).aggregate( models.Max('weight'))['weight__max'] or 0) return self.create(item=item, user=user, weight=weight + 1) class Speaker(RESTModelMixin, models.Model): """ Model for the Speaker list. """ objects = SpeakerManager() user = models.ForeignKey(User) """ ForeinKey to the user who speaks. """ item = models.ForeignKey(Item) """ ForeinKey to the AgendaItem to which the user want to speak. """ begin_time = models.DateTimeField(null=True) """ Saves the time, when the speaker begins to speak. None, if he has not spoken yet. """ end_time = models.DateTimeField(null=True) """ Saves the time, when the speaker ends his speach. None, if he is not finished yet. """ weight = models.IntegerField(null=True) """ The sort order of the list of speakers. None, if he has already spoken. """ class Meta: permissions = ( ('can_be_speaker', ugettext_noop('Can put oneself on the list of speakers')), ) def __str__(self): return str(self.user) def begin_speach(self): """ Let the user speak. Set the weight to None and the time to now. If anyone is still speaking, end his speach. """ try: actual_speaker = Speaker.objects.filter(item=self.item, end_time=None).exclude(begin_time=None).get() except Speaker.DoesNotExist: pass else: actual_speaker.end_speach() self.weight = None self.begin_time = datetime.now() self.save() # start countdown if config['agenda_couple_countdown_and_speakers']: # TODO: Fix me with the new countdown api # reset_countdown() # start_countdown() pass def end_speach(self): """ The speach is finished. Set the time to now. """ self.end_time = datetime.now() self.save() # stop countdown if config['agenda_couple_countdown_and_speakers']: # TODO: Fix me with the new countdown api # stop_countdown() pass def get_root_rest_element(self): """ Returns the item to this instance which is the root REST element. """ return self.item