452 lines
15 KiB
Python
452 lines
15 KiB
Python
from collections import defaultdict
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from datetime import datetime
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from django.contrib.auth.models import AnonymousUser
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from django.contrib.contenttypes.fields import GenericForeignKey
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from django.contrib.contenttypes.models import ContentType
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from django.core.exceptions import ValidationError
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from django.db import models
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from django.utils.translation import ugettext as _
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from django.utils.translation import ugettext_lazy, ugettext_noop
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from openslides.config.api import config
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from openslides.core.models import Tag
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from openslides.projector.models import SlideMixin
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from openslides.users.models import User
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from openslides.utils.exceptions import OpenSlidesError
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from openslides.utils.rest_api import RESTModelMixin
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from openslides.utils.utils import to_roman
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class ItemManager(models.Manager):
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def get_tree(self, only_agenda_items=False, include_content=False):
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"""
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Generator that yields dictonaries. Each dictonary has two keys, id
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and children, where id is the id of one agenda item and children is a
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generator that yields dictonaries like the one discribed.
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If only_agenda_items is True, the tree hides ORGANIZATIONAL_ITEMs.
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If include_content is True, the yielded dictonaries have no key 'id'
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but a key 'item' with the entire object.
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"""
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item_queryset = self.order_by('weight')
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if only_agenda_items:
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item_queryset = item_queryset.filter(type__exact=Item.AGENDA_ITEM)
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# Index the items to get the children for each item
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item_children = defaultdict(list)
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for item in item_queryset:
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if item.parent:
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item_children[item.parent_id].append(item)
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def get_children(items):
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"""
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Generator that yields the descibed diconaries.
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"""
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for item in items:
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if include_content:
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yield dict(item=item, children=get_children(item_children[item.pk]))
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else:
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yield dict(id=item.pk, children=get_children(item_children[item.pk]))
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yield from get_children(filter(lambda item: item.parent is None, item_queryset))
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def set_tree(self, tree):
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"""
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Sets the agenda tree.
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The tree has to be a nested object. For example:
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[{"id": 1}, {"id": 2, "children": [{"id": 3}]}]
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"""
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def walk_items(tree, parent=None):
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"""
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Generator that returns each item in the tree as tuple.
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This tuples have tree values. The item id, the item parent and the
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weight of the item.
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"""
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for weight, element in enumerate(tree):
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yield (element['id'], parent, weight)
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yield from walk_items(element.get('children', []), element['id'])
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touched_items = set()
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for item_pk, parent_pk, weight in walk_items(tree):
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# Check that the item is only once in the tree to prevent invalid trees
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if item_pk in touched_items:
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raise ValueError("Item %d is more then once in the tree" % item_pk)
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touched_items.add(item_pk)
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Item.objects.filter(pk=item_pk).update(
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parent_id=parent_pk,
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weight=weight)
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class Item(RESTModelMixin, SlideMixin, models.Model):
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"""
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An Agenda Item
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"""
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objects = ItemManager()
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slide_callback_name = 'agenda'
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AGENDA_ITEM = 1
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ORGANIZATIONAL_ITEM = 2
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ITEM_TYPE = (
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(AGENDA_ITEM, ugettext_lazy('Agenda item')),
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(ORGANIZATIONAL_ITEM, ugettext_lazy('Organizational item')))
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item_number = models.CharField(blank=True, max_length=255, verbose_name=ugettext_lazy("Number"))
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"""
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Number of agenda item.
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"""
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title = models.CharField(null=True, max_length=255, verbose_name=ugettext_lazy("Title"))
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"""
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Title of the agenda item.
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"""
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text = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Text"))
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"""
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The optional text of the agenda item.
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"""
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comment = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Comment"))
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"""
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Optional comment to the agenda item. Will not be shoun to normal users.
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"""
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closed = models.BooleanField(default=False, verbose_name=ugettext_lazy("Closed"))
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"""
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Flag, if the item is finished.
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"""
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type = models.IntegerField(max_length=1, choices=ITEM_TYPE,
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default=AGENDA_ITEM, verbose_name=ugettext_lazy("Type"))
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"""
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Type of the agenda item.
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See Item.ITEM_TYPE for more information.
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"""
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duration = models.CharField(null=True, blank=True, max_length=5)
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"""
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The intended duration for the topic.
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"""
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parent = models.ForeignKey('self', null=True, blank=True, related_name='children')
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"""
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The parent item in the agenda tree.
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"""
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weight = models.IntegerField(default=0, verbose_name=ugettext_lazy("Weight"))
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"""
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Weight to sort the item in the agenda.
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"""
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content_type = models.ForeignKey(ContentType, null=True, blank=True)
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"""
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Field for generic relation to a related object. Type of the object.
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"""
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object_id = models.PositiveIntegerField(null=True, blank=True)
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"""
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Field for generic relation to a related object. Id of the object.
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"""
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content_object = GenericForeignKey()
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"""
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Field for generic relation to a related object. General field to the related object.
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"""
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speaker_list_closed = models.BooleanField(
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default=False, verbose_name=ugettext_lazy("List of speakers is closed"))
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"""
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True, if the list of speakers is closed.
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"""
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tags = models.ManyToManyField(Tag, blank=True)
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"""
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Tags to categorise agenda items.
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"""
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class Meta:
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permissions = (
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('can_see', ugettext_noop("Can see agenda")),
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('can_manage', ugettext_noop("Can manage agenda")),
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('can_see_orga_items', ugettext_noop("Can see orga items and time scheduling of agenda")))
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def __str__(self):
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return self.get_title()
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def clean(self):
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"""
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Ensures that the children of orga items are only orga items.
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"""
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if (self.type == self.AGENDA_ITEM and
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self.parent is not None and
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self.parent.type == self.ORGANIZATIONAL_ITEM):
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raise ValidationError(_('Agenda items can not be child elements of an organizational item.'))
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if (self.type == self.ORGANIZATIONAL_ITEM and
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self.children.filter(type=self.AGENDA_ITEM).exists()):
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raise ValidationError(_('Organizational items can not have agenda items as child elements.'))
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return super().clean()
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def delete(self, with_children=False):
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"""
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Delete the Item.
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If with_children is True, all children of the item will be deleted as
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well. If with_children is False, all children will be children of the
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parent of the item.
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"""
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if not with_children:
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for child in self.children.all():
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child.parent = self.parent
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child.save()
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super().delete()
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def get_title(self):
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"""
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Return the title of this item.
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"""
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if not self.content_object:
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agenda_title = self.title or ""
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else:
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try:
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agenda_title = self.content_object.get_agenda_title()
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except AttributeError:
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raise NotImplementedError('You have to provide a get_agenda_title '
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'method on your related model.')
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return '%s %s' % (self.item_no, agenda_title) if self.item_no else agenda_title
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def get_title_supplement(self):
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"""
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Return a supplement for the title.
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"""
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if not self.content_object:
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return ''
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try:
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return self.content_object.get_agenda_title_supplement()
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except AttributeError:
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raise NotImplementedError('You have to provide a get_agenda_title_supplement method on your related model.')
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def get_list_of_speakers(self, old_speakers_count=None, coming_speakers_count=None):
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"""
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Returns the list of speakers as a list of dictionaries. Each
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dictionary contains a prefix, the speaker and its type. Types
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are old_speaker, actual_speaker and coming_speaker.
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"""
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speaker_query = Speaker.objects.filter(item=self) # TODO: Why not self.speaker_set?
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list_of_speakers = []
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# Parse old speakers
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old_speakers = speaker_query.exclude(begin_time=None).exclude(end_time=None).order_by('end_time')
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if old_speakers_count is None:
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old_speakers_count = old_speakers.count()
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last_old_speakers_count = max(0, old_speakers.count() - old_speakers_count)
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old_speakers = old_speakers[last_old_speakers_count:]
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for number, speaker in enumerate(old_speakers):
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prefix = old_speakers_count - number
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speaker_dict = {
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'prefix': '-%d' % prefix,
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'speaker': speaker,
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'type': 'old_speaker',
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'first_in_group': False,
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'last_in_group': False}
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if number == 0:
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speaker_dict['first_in_group'] = True
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if number == old_speakers_count - 1:
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speaker_dict['last_in_group'] = True
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list_of_speakers.append(speaker_dict)
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# Parse actual speaker
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try:
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actual_speaker = speaker_query.filter(end_time=None).exclude(begin_time=None).get()
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except Speaker.DoesNotExist:
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pass
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else:
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list_of_speakers.append({
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'prefix': '0',
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'speaker': actual_speaker,
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'type': 'actual_speaker',
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'first_in_group': True,
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'last_in_group': True})
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# Parse coming speakers
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coming_speakers = speaker_query.filter(begin_time=None).order_by('weight')
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if coming_speakers_count is None:
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coming_speakers_count = coming_speakers.count()
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coming_speakers = coming_speakers[:max(0, coming_speakers_count)]
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for number, speaker in enumerate(coming_speakers):
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speaker_dict = {
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'prefix': number + 1,
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'speaker': speaker,
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'type': 'coming_speaker',
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'first_in_group': False,
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'last_in_group': False}
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if number == 0:
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speaker_dict['first_in_group'] = True
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if number == coming_speakers_count - 1:
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speaker_dict['last_in_group'] = True
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list_of_speakers.append(speaker_dict)
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return list_of_speakers
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def get_next_speaker(self):
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"""
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Returns the speaker object of the user who is next.
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"""
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try:
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return self.speaker_set.filter(begin_time=None).order_by('weight')[0]
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except IndexError:
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# The list of speakers is empty.
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return None
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def is_active_slide(self):
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"""
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Returns True if the slide is active. If the slide is a related item,
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Returns True if the related object is active.
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"""
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if super(Item, self).is_active_slide():
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value = True
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elif self.content_object and isinstance(self.content_object, SlideMixin):
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value = self.content_object.is_active_slide()
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else:
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value = False
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return value
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@property
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def item_no(self):
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item_no = None
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if self.item_number:
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if config['agenda_number_prefix']:
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item_no = '%s %s' % (config['agenda_number_prefix'], self.item_number)
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else:
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item_no = str(self.item_number)
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return item_no
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def calc_item_no(self):
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"""
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Returns the number of this agenda item.
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"""
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if self.type == self.AGENDA_ITEM:
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if self.parent is None:
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sibling_no = self.sibling_no()
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if config['agenda_numeral_system'] == 'arabic':
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return str(sibling_no)
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else: # config['agenda_numeral_system'] == 'roman'
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return to_roman(sibling_no)
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else:
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return '%s.%s' % (self.parent.calc_item_no(), self.sibling_no())
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else:
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return ''
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def sibling_no(self):
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"""
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Counts how many AGENDA_ITEMS with the same parent (siblings) have a
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smaller weight then this item.
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Returns this number + 1 or 0 when self is not an AGENDA_ITEM.
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"""
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return Item.objects.filter(
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parent=self.parent,
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type=self.AGENDA_ITEM,
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weight__lte=self.weight).count()
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class SpeakerManager(models.Manager):
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def add(self, user, item):
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if self.filter(user=user, item=item, begin_time=None).exists():
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raise OpenSlidesError(_(
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'%(user)s is already on the list of speakers of item %(id)s.')
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% {'user': user, 'id': item.id})
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if isinstance(user, AnonymousUser):
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raise OpenSlidesError(
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_('An anonymous user can not be on lists of speakers.'))
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weight = (self.filter(item=item).aggregate(
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models.Max('weight'))['weight__max'] or 0)
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return self.create(item=item, user=user, weight=weight + 1)
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class Speaker(RESTModelMixin, models.Model):
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"""
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Model for the Speaker list.
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"""
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objects = SpeakerManager()
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user = models.ForeignKey(User)
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"""
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ForeinKey to the user who speaks.
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"""
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item = models.ForeignKey(Item)
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"""
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ForeinKey to the AgendaItem to which the user want to speak.
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"""
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begin_time = models.DateTimeField(null=True)
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"""
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Saves the time, when the speaker begins to speak. None, if he has not spoken yet.
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"""
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end_time = models.DateTimeField(null=True)
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"""
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Saves the time, when the speaker ends his speach. None, if he is not finished yet.
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"""
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weight = models.IntegerField(null=True)
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"""
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The sort order of the list of speakers. None, if he has already spoken.
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"""
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class Meta:
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permissions = (
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('can_be_speaker', ugettext_noop('Can put oneself on the list of speakers')),
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)
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def __str__(self):
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return str(self.user)
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def begin_speach(self):
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"""
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Let the user speak.
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Set the weight to None and the time to now. If anyone is still
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speaking, end his speach.
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"""
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try:
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actual_speaker = Speaker.objects.filter(item=self.item, end_time=None).exclude(begin_time=None).get()
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except Speaker.DoesNotExist:
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pass
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else:
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actual_speaker.end_speach()
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self.weight = None
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self.begin_time = datetime.now()
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self.save()
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# start countdown
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if config['agenda_couple_countdown_and_speakers']:
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# TODO: Fix me with the new countdown api
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# reset_countdown()
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# start_countdown()
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pass
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def end_speach(self):
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"""
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The speach is finished. Set the time to now.
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"""
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self.end_time = datetime.now()
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self.save()
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# stop countdown
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if config['agenda_couple_countdown_and_speakers']:
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# TODO: Fix me with the new countdown api
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# stop_countdown()
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pass
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def get_root_rest_element(self):
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"""
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Returns the item to this instance which is the root REST element.
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"""
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return self.item
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