149 lines
6.0 KiB
Python
149 lines
6.0 KiB
Python
from typing import Generator, Type
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from ..core.config import config
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from ..core.exceptions import ProjectorException
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from ..core.models import Projector
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from ..utils.collection import CollectionElement
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from ..utils.projector import ProjectorElement
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from .models import Item
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class ItemListSlide(ProjectorElement):
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"""
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Slide definitions for Item model.
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This is only for item list slides.
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Set 'id' to None to get a list slide of all root items. Set 'id' to an
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integer to get a list slide of the children of the metioned item.
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Additionally set 'tree' to True to get also children of children.
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"""
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name = 'agenda/item-list'
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def check_data(self):
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pk = self.config_entry.get('id')
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if pk is not None:
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# Children slide.
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if not Item.objects.filter(pk=pk).exists():
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raise ProjectorException('Item does not exist.')
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def get_requirements(self, config_entry):
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yield from Item.objects.all()
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class ListOfSpeakersSlide(ProjectorElement):
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"""
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Slide definitions for Item model.
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This is only for list of speakers slide. You have to set 'id'.
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"""
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name = 'agenda/list-of-speakers'
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def check_data(self):
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if not Item.objects.filter(pk=self.config_entry.get('id')).exists():
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raise ProjectorException('Item does not exist.')
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def get_requirements(self, config_entry):
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pk = config_entry.get('id')
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if pk is not None:
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# List of speakers slide.
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try:
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item = Item.objects.get(pk=pk)
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except Item.DoesNotExist:
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# Item does not exist. Just do nothing.
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pass
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else:
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yield item
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yield item.content_object
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for speaker in item.speakers.filter(end_time=None):
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# Yield current speaker and next speakers
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yield speaker.user
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query = (item.speakers.exclude(end_time=None)
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.order_by('-end_time')[:config['agenda_show_last_speakers']])
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for speaker in query:
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# Yield last speakers
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yield speaker.user
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def get_collection_elements_required_for_this(self, collection_element, config_entry):
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output = super().get_collection_elements_required_for_this(collection_element, config_entry)
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# Full update if item changes because then we may have new
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# candidates and therefor need new users.
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if collection_element.collection_string == Item.get_collection_string() and collection_element.id == config_entry.get('id'):
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output.extend(self.get_requirements_as_collection_elements(config_entry))
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return output
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def update_data(self):
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return {'agenda_item_id': self.config_entry.get('id')}
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class CurrentListOfSpeakersSlide(ProjectorElement):
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"""
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Slide for the current list of speakers.
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"""
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name = 'agenda/current-list-of-speakers'
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def get_requirements(self, config_entry):
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# The query mechanism on client needs the referenced projector.
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try:
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reference_projector = Projector.objects.get(
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pk=config['projector_currentListOfSpeakers_reference'])
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except Projector.DoesNotExist:
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# Reference projector was deleted so this projector element is empty.
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# Skip yielding more requirements (items and speakers).
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pass
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else:
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yield reference_projector
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items = self.get_agenda_items(reference_projector)
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for item in items:
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yield item
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yield item.content_object
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for speaker in item.speakers.filter(end_time=None):
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yield speaker.user
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query = (item.speakers.exclude(end_time=None)
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.order_by('-end_time')[:config['agenda_show_last_speakers']])
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for speaker in query:
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# Yield last speakers
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yield speaker.user
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def get_agenda_items(self, projector):
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for element in projector.elements.values():
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agenda_item_id = element.get('agenda_item_id')
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if agenda_item_id is not None:
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yield Item.objects.get(pk=agenda_item_id)
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def get_collection_elements_required_for_this(self, collection_element, config_entry):
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output = super().get_collection_elements_required_for_this(collection_element, config_entry)
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# Full update if agenda_item or referenced projector changes because
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# then we may have new candidates and therefor need new users.
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try:
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reference_projector = Projector.objects.get(
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pk=config['projector_currentListOfSpeakers_reference'])
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except Projector.DoesNotExist:
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# Reference projector was deleted so this projector element is empty.
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# Skip appending more stuff to output.
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pass
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else:
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is_reference_projector = collection_element == CollectionElement.from_values(
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reference_projector.get_collection_string(),
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reference_projector.pk)
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is_config = (
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collection_element.collection_string == 'core/config' and
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collection_element.information.get('changed_config') == 'projector_currentListOfSpeakers_reference')
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if is_reference_projector or is_config:
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output.extend(self.get_requirements_as_collection_elements(config_entry))
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else:
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items = self.get_agenda_items(reference_projector)
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for item in items:
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if collection_element == CollectionElement.from_values(item.get_collection_string(), item.pk):
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output.extend(self.get_requirements_as_collection_elements(config_entry))
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break
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return output
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def get_projector_elements() -> Generator[Type[ProjectorElement], None, None]:
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yield ItemListSlide
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yield ListOfSpeakersSlide
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yield CurrentListOfSpeakersSlide
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