OpenSlides/openslides/agenda/models.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.agenda.models
~~~~~~~~~~~~~~~~~~~~~~~~
Models for the agenda app.
:copyright: 20112013 by OpenSlides team, see AUTHORS.
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:license: GNU GPL, see LICENSE for more details.
"""
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from datetime import datetime
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from django.db import models
from django.contrib.auth.models import AnonymousUser
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import generic
from django.core.urlresolvers import reverse
from django.utils.translation import ugettext_lazy, ugettext_noop, ugettext as _
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from mptt.models import MPTTModel, TreeForeignKey
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from openslides.utils.exceptions import OpenSlidesError
from openslides.config.api import config
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from openslides.projector.projector import SlideMixin
from openslides.projector.api import (
register_slidemodel, get_slide_from_sid, register_slidefunc)
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from openslides.utils.person.models import PersonField
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class Item(MPTTModel, SlideMixin):
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"""
An Agenda Item
MPTT-model. See http://django-mptt.github.com/django-mptt/
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"""
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prefix = 'item'
AGENDA_ITEM = 1
ORGANIZATIONAL_ITEM = 2
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ITEM_TYPE = (
(AGENDA_ITEM, ugettext_lazy('Agenda item')),
(ORGANIZATIONAL_ITEM, ugettext_lazy('Organizational item')))
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title = models.CharField(null=True, max_length=255, verbose_name=ugettext_lazy("Title"))
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"""
Title of the agenda item.
"""
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text = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Text"))
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"""
The optional text of the agenda item.
"""
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comment = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Comment"))
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"""
Optional comment to the agenda item. Will not be shoun to normal users.
"""
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closed = models.BooleanField(default=False, verbose_name=ugettext_lazy("Closed"))
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"""
Flag, if the item is finished.
"""
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type = models.IntegerField(max_length=1, choices=ITEM_TYPE,
default=AGENDA_ITEM, verbose_name=ugettext_lazy("Type"))
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"""
Type of the agenda item.
See Item.ITEM_TYPE for more information.
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"""
duration = models.CharField(null=True, blank=True, max_length=5,
verbose_name=ugettext_lazy("Duration (hh:mm)"))
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"""
The intended duration for the topic.
"""
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parent = TreeForeignKey('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.
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"""
object_id = models.PositiveIntegerField(null=True, blank=True)
"""
Field for generic relation to a related object. Id of the object.
"""
content_object = generic.GenericForeignKey()
"""
Field for generic relation to a related object. General field to the related object.
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"""
speaker_list_closed = models.BooleanField(
default=False, verbose_name=ugettext_lazy("List of speakers is closed"))
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"""
True, if the list of speakers is closed.
"""
class Meta:
permissions = (
('can_see_agenda', ugettext_noop("Can see agenda")),
('can_manage_agenda', ugettext_noop("Can manage agenda")),
('can_see_orga_items', ugettext_noop("Can see orga items and time scheduling of agenda")))
class MPTTMeta:
order_insertion_by = ['weight']
def __unicode__(self):
return self.get_title()
def get_absolute_url(self, link='detail'):
"""
Return the URL to this item.
The link can be detail, update or delete.
"""
if link == 'detail' or link == 'view':
return reverse('item_view', args=[str(self.id)])
if link == 'update' or link == 'edit':
return reverse('item_edit', args=[str(self.id)])
if link == 'delete':
return reverse('item_delete', args=[str(self.id)])
def get_title(self):
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"""
Return the title of this item.
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"""
if not self.content_object:
return self.title
try:
return self.content_object.get_agenda_title()
except AttributeError:
raise NotImplementedError('You have to provide a get_agenda_title method on your related model.')
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.')
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def slide(self):
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"""
Return a map with all data for the slide.
There are four cases:
* summary slide
* list of speakers
* related item, i. e. the slide of the related object
* normal slide of the item
The method returns only one of them according to the config value
'presentation_argument' and the attribute 'content_object'.
"""
if config['presentation_argument'] == 'summary':
data = {'title': self.get_title(),
'items': self.get_children().filter(type__exact=Item.AGENDA_ITEM),
'template': 'projector/AgendaSummary.html'}
elif config['presentation_argument'] == 'show_list_of_speakers':
list_of_speakers = self.get_list_of_speakers(
old_speakers_count=config['agenda_show_last_speakers'])
data = {'title': self.get_title(),
'item': self,
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'template': 'projector/agenda_list_of_speaker.html',
'list_of_speakers': list_of_speakers}
elif self.content_object:
data = self.content_object.slide()
else:
data = {'item': self,
'title': self.get_title(),
'template': 'projector/AgendaText.html'}
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return data
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def set_closed(self, closed=True):
"""
Changes the closed-status of the item.
"""
self.closed = closed
self.save()
@property
def weight_form(self):
"""
Return the WeightForm for this item.
"""
from openslides.agenda.forms import ItemOrderForm
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try:
parent = self.parent.id
except AttributeError:
parent = 0
initial = {
'weight': self.weight,
'self': self.id,
'parent': parent,
}
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return ItemOrderForm(initial=initial, prefix="i%d" % self.id)
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def delete(self, with_children=False):
"""
Delete the Item.
"""
if not with_children:
for child in self.get_children():
child.move_to(self.parent)
child.save()
super(Item, self).delete()
Item.objects.rebuild()
def get_list_of_speakers(self, old_speakers_count=None, coming_speakers_count=None):
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"""
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.
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"""
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
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def get_next_speaker(self):
"""
Returns the speaker object of the person 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
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class SpeakerManager(models.Manager):
def add(self, person, item):
if self.filter(person=person, item=item, begin_time=None).exists():
raise OpenSlidesError(_(
'%(person)s is already on the list of speakers of item %(id)s.')
% {'person': person, 'id': item.id})
if isinstance(person, AnonymousUser):
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(
models.Max('weight'))['weight__max'] or 0)
return self.create(item=item, person=person, weight=weight + 1)
class Speaker(models.Model):
"""
Model for the Speaker list.
"""
objects = SpeakerManager()
person = PersonField()
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"""
ForeinKey to the person who speaks.
"""
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item = models.ForeignKey(Item)
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"""
ForeinKey to the AgendaItem to which the person 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)
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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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"""
The sort order of the list of speakers. None, if he has already spoken.
"""
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class Meta:
permissions = (
('can_be_speaker', ugettext_noop('Can put oneself on the list of speakers')),
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)
def __unicode__(self):
return unicode(self.person)
def get_absolute_url(self, link='detail'):
if link == 'detail' or link == 'view':
return self.person.get_absolute_url('detail')
if link == 'delete':
return reverse('agenda_speaker_delete',
args=[self.item.pk, self.pk])
def begin_speach(self):
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"""
Let the person speak.
Set the weight to None and the time to now. If anyone is still
speaking, end his speach.
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"""
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()
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self.weight = None
self.begin_time = datetime.now()
self.save()
def end_speach(self):
"""
The speach is finished. Set the time to now.
"""
self.end_time = datetime.now()
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self.save()