From b034839ac826f37397609799223998b95418228d Mon Sep 17 00:00:00 2001
From: Oskar Hahn <mail@oshahn.de>
Date: Wed, 22 Aug 2018 07:59:22 +0200
Subject: [PATCH] Remove old projector code

---
 openslides/agenda/access_permissions.py      |  18 --
 openslides/agenda/projector.py               |  94 -----------
 openslides/assignments/access_permissions.py |  14 --
 openslides/assignments/projector.py          |  30 ----
 openslides/core/config.py                    |   2 +-
 openslides/core/models.py                    |  56 ------
 openslides/core/projector.py                 |  18 --
 openslides/mediafiles/projector.py           |   9 -
 openslides/motions/access_permissions.py     |  12 --
 openslides/motions/projector.py              |  86 +---------
 openslides/routing.py                        |   3 +-
 openslides/topics/projector.py               |  10 --
 openslides/users/access_permissions.py       |  21 ---
 openslides/users/projector.py                |   9 -
 openslides/utils/access_permissions.py       |   8 -
 openslides/utils/autoupdate.py               |  44 +----
 openslides/utils/collection.py               | 125 +-------------
 openslides/utils/consumers.py                | 169 +------------------
 openslides/utils/models.py                   |  16 +-
 openslides/utils/projector.py                |  42 +----
 tests/unit/users/test_access_permissions.py  |  46 +----
 tests/unit/utils/test_collection.py          |  19 ---
 22 files changed, 29 insertions(+), 822 deletions(-)

diff --git a/openslides/agenda/access_permissions.py b/openslides/agenda/access_permissions.py
index 28da16c93..9d1738f44 100644
--- a/openslides/agenda/access_permissions.py
+++ b/openslides/agenda/access_permissions.py
@@ -92,21 +92,3 @@ class ItemAccessPermissions(BaseAccessPermissions):
             data = []
 
         return data
-
-    def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Returns the restricted serialized data for the instance prepared
-        for the projector. Removes field 'comment'.
-        """
-        def filtered_data(full_data, blocked_keys):
-            """
-            Returns a new dict like full_data but with all blocked_keys removed.
-            """
-            whitelist = full_data.keys() - blocked_keys
-            return {key: full_data[key] for key in whitelist}
-
-        # Parse data.
-        blocked_keys = ('comment',)
-        data = [filtered_data(full, blocked_keys) for full in full_data]
-
-        return data
diff --git a/openslides/agenda/projector.py b/openslides/agenda/projector.py
index 6a7b73c6e..a29af1055 100644
--- a/openslides/agenda/projector.py
+++ b/openslides/agenda/projector.py
@@ -1,9 +1,6 @@
 from typing import Generator, Type
 
-from ..core.config import config
 from ..core.exceptions import ProjectorException
-from ..core.models import Projector
-from ..utils.collection import CollectionElement
 from ..utils.projector import ProjectorElement
 from .models import Item
 
@@ -28,9 +25,6 @@ class ItemListSlide(ProjectorElement):
             if not Item.objects.filter(pk=pk).exists():
                 raise ProjectorException('Item does not exist.')
 
-    def get_requirements(self, config_entry):
-        yield from Item.objects.all()
-
 
 class ListOfSpeakersSlide(ProjectorElement):
     """
@@ -43,35 +37,6 @@ class ListOfSpeakersSlide(ProjectorElement):
         if not Item.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Item does not exist.')
 
-    def get_requirements(self, config_entry):
-        pk = config_entry.get('id')
-        if pk is not None:
-            # List of speakers slide.
-            try:
-                item = Item.objects.get(pk=pk)
-            except Item.DoesNotExist:
-                # Item does not exist. Just do nothing.
-                pass
-            else:
-                yield item
-                yield item.content_object
-                for speaker in item.speakers.filter(end_time=None):
-                    # Yield current speaker and next speakers
-                    yield speaker.user
-                query = (item.speakers.exclude(end_time=None)
-                         .order_by('-end_time')[:config['agenda_show_last_speakers']])
-                for speaker in query:
-                    # Yield last speakers
-                    yield speaker.user
-
-    def get_collection_elements_required_for_this(self, collection_element, config_entry):
-        output = super().get_collection_elements_required_for_this(collection_element, config_entry)
-        # Full update if item changes because then we may have new
-        # candidates and therefor need new users.
-        if collection_element.collection_string == Item.get_collection_string() and collection_element.id == config_entry.get('id'):
-            output.extend(self.get_requirements_as_collection_elements(config_entry))
-        return output
-
     def update_data(self):
         return {'agenda_item_id': self.config_entry.get('id')}
 
@@ -82,65 +47,6 @@ class CurrentListOfSpeakersSlide(ProjectorElement):
     """
     name = 'agenda/current-list-of-speakers'
 
-    def get_requirements(self, config_entry):
-        # The query mechanism on client needs the referenced projector.
-        try:
-            reference_projector = Projector.objects.get(
-                pk=config['projector_currentListOfSpeakers_reference'])
-        except Projector.DoesNotExist:
-            # Reference projector was deleted so this projector element is empty.
-            # Skip yielding more requirements (items and speakers).
-            pass
-        else:
-            yield reference_projector
-
-            items = self.get_agenda_items(reference_projector)
-            for item in items:
-                yield item
-                yield item.content_object
-                for speaker in item.speakers.filter(end_time=None):
-                    yield speaker.user
-                query = (item.speakers.exclude(end_time=None)
-                         .order_by('-end_time')[:config['agenda_show_last_speakers']])
-                for speaker in query:
-                    # Yield last speakers
-                    yield speaker.user
-
-    def get_agenda_items(self, projector):
-        for element in projector.elements.values():
-            agenda_item_id = element.get('agenda_item_id')
-            if agenda_item_id is not None:
-                yield Item.objects.get(pk=agenda_item_id)
-
-    def get_collection_elements_required_for_this(self, collection_element, config_entry):
-        output = super().get_collection_elements_required_for_this(collection_element, config_entry)
-        # Full update if agenda_item or referenced projector changes because
-        # then we may have new candidates and therefor need new users.
-        try:
-            reference_projector = Projector.objects.get(
-                pk=config['projector_currentListOfSpeakers_reference'])
-        except Projector.DoesNotExist:
-            # Reference projector was deleted so this projector element is empty.
-            # Skip appending more stuff to output.
-            pass
-        else:
-            is_reference_projector = collection_element == CollectionElement.from_values(
-                    reference_projector.get_collection_string(),
-                    reference_projector.pk)
-            is_config = (
-                collection_element.collection_string == 'core/config' and
-                collection_element.information.get('changed_config') == 'projector_currentListOfSpeakers_reference')
-
-            if is_reference_projector or is_config:
-                output.extend(self.get_requirements_as_collection_elements(config_entry))
-            else:
-                items = self.get_agenda_items(reference_projector)
-                for item in items:
-                    if collection_element == CollectionElement.from_values(item.get_collection_string(), item.pk):
-                        output.extend(self.get_requirements_as_collection_elements(config_entry))
-                        break
-        return output
-
 
 def get_projector_elements() -> Generator[Type[ProjectorElement], None, None]:
     yield ItemListSlide
diff --git a/openslides/assignments/access_permissions.py b/openslides/assignments/access_permissions.py
index 7c0f883e7..f0dd3fe4d 100644
--- a/openslides/assignments/access_permissions.py
+++ b/openslides/assignments/access_permissions.py
@@ -55,17 +55,3 @@ class AssignmentAccessPermissions(BaseAccessPermissions):
             data = []
 
         return data
-
-    def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Returns the restricted serialized data for the instance prepared
-        for the projector. Removes unpublished polls.
-        """
-        # Parse data. Exclude unpublished polls.
-        data = []
-        for full in full_data:
-            full_copy = full.copy()
-            full_copy['polls'] = [poll for poll in full['polls'] if poll['published']]
-            data.append(full_copy)
-
-        return data
diff --git a/openslides/assignments/projector.py b/openslides/assignments/projector.py
index f79de375f..e3345d14a 100644
--- a/openslides/assignments/projector.py
+++ b/openslides/assignments/projector.py
@@ -26,36 +26,6 @@ class AssignmentSlide(ProjectorElement):
             if poll.assignment_id != self.config_entry.get('id'):
                 raise ProjectorException('Assignment id and poll do not belong together.')
 
-    def get_requirements(self, config_entry):
-        try:
-            assignment = Assignment.objects.get(pk=config_entry.get('id'))
-        except Assignment.DoesNotExist:
-            # Assignment does not exist. Just do nothing.
-            pass
-        else:
-            yield assignment
-            yield assignment.agenda_item
-            if not config_entry.get('poll'):
-                # Assignment detail slide. Yield user instances of current
-                # candidates (i. e. future poll participants) and elected
-                # persons (i. e. former poll participants).
-                for user in assignment.related_users.all():
-                    yield user
-            else:
-                # Assignment poll slide. Yield user instances of the
-                # participants of all polls.
-                for poll in assignment.polls.all().prefetch_related('options'):
-                    for option in poll.options.all():
-                        yield option.candidate
-
-    def get_collection_elements_required_for_this(self, collection_element, config_entry):
-        output = super().get_collection_elements_required_for_this(collection_element, config_entry)
-        # Full update if assignment changes because then we may have new
-        # candidates and therefor need new users.
-        if collection_element.collection_string == Assignment.get_collection_string() and collection_element.id == config_entry.get('id'):
-            output.extend(self.get_requirements_as_collection_elements(config_entry))
-        return output
-
     def update_data(self):
         data = None
         try:
diff --git a/openslides/core/config.py b/openslides/core/config.py
index dce49330a..9185a5e5f 100644
--- a/openslides/core/config.py
+++ b/openslides/core/config.py
@@ -165,7 +165,7 @@ class ConfigHandler:
         # Save the new value to the database.
         db_value = ConfigStore.objects.get(key=key)
         db_value.value = value
-        db_value.save(information={'changed_config': key})
+        db_value.save()
 
         # Call on_change callback.
         if config_variable.on_change:
diff --git a/openslides/core/models.py b/openslides/core/models.py
index a186962a1..e80ef2f69 100644
--- a/openslides/core/models.py
+++ b/openslides/core/models.py
@@ -3,7 +3,6 @@ from django.db import models
 from django.utils.timezone import now
 from jsonfield import JSONField
 
-from ..utils.collection import CollectionElement
 from ..utils.models import RESTModelMixin
 from ..utils.projector import get_all_projector_elements
 from .access_permissions import (
@@ -130,61 +129,6 @@ class Projector(RESTModelMixin, models.Model):
                     result[key]['error'] = str(e)
         return result
 
-    def get_all_requirements(self):
-        """
-        Generator which returns all instances that are shown on this projector.
-        """
-        # Get all elements from all apps.
-        elements = get_all_projector_elements()
-
-        # Generator
-        for key, value in self.config.items():
-            element = elements.get(value['name'])
-            if element is not None:
-                yield from element.get_requirements(value)
-
-    def get_collection_elements_required_for_this(self, collection_element):
-        """
-        Returns an iterable of CollectionElements that have to be sent to this
-        projector according to the given collection_element.
-        """
-        from .config import config
-
-        output = []
-        changed_fields = collection_element.information.get('changed_fields', [])
-
-        if (collection_element.collection_string == self.get_collection_string() and
-                changed_fields and
-                'config' not in changed_fields):
-            # Projector model changed without changeing the projector config. So we just send this data.
-            output.append(collection_element)
-        else:
-            # It is necessary to parse all active projector elements to check whether they require some data.
-            this_projector = collection_element.collection_string == self.get_collection_string() and collection_element.id == self.pk
-            collection_element.information['this_projector'] = this_projector
-
-            elements = get_all_projector_elements()
-
-            # Iterate over all active projector elements.
-            for key, value in self.config.items():
-                element = elements.get(value['name'])
-                if element is not None:
-                    if collection_element.information.get('changed_config') == 'projector_broadcast':
-                        # In case of broadcast we need full update.
-                        output.extend(element.get_requirements_as_collection_elements(value))
-                    else:
-                        # In normal case we need all collections required by the element.
-                        output.extend(element.get_collection_elements_required_for_this(collection_element, value))
-
-            # If config changed, send also this config to the projector.
-            if collection_element.collection_string == config.get_collection_string():
-                output.append(collection_element)
-                if collection_element.information.get('changed_config') == 'projector_broadcast':
-                    # In case of broadcast we also need the projector himself.
-                    output.append(CollectionElement.from_instance(self))
-
-        return output
-
     @classmethod
     def remove_any(cls, skip_autoupdate=False, **kwargs):
         """
diff --git a/openslides/core/projector.py b/openslides/core/projector.py
index 35a04311c..a1c39551c 100644
--- a/openslides/core/projector.py
+++ b/openslides/core/projector.py
@@ -22,15 +22,6 @@ class CountdownElement(ProjectorElement):
         if not Countdown.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Countdown does not exists.')
 
-    def get_requirements(self, config_entry):
-        try:
-            countdown = Countdown.objects.get(pk=config_entry.get('id'))
-        except Countdown.DoesNotExist:
-            # Just do nothing if message does not exist
-            pass
-        else:
-            yield countdown
-
 
 class ProjectorMessageElement(ProjectorElement):
     """
@@ -42,15 +33,6 @@ class ProjectorMessageElement(ProjectorElement):
         if not ProjectorMessage.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Message does not exists.')
 
-    def get_requirements(self, config_entry):
-        try:
-            message = ProjectorMessage.objects.get(pk=config_entry.get('id'))
-        except ProjectorMessage.DoesNotExist:
-            # Just do nothing if message does not exist
-            pass
-        else:
-            yield message
-
 
 def get_projector_elements() -> Generator[Type[ProjectorElement], None, None]:
     yield Clock
diff --git a/openslides/mediafiles/projector.py b/openslides/mediafiles/projector.py
index c4f4e6d1d..f939ce4f4 100644
--- a/openslides/mediafiles/projector.py
+++ b/openslides/mediafiles/projector.py
@@ -15,15 +15,6 @@ class MediafileSlide(ProjectorElement):
         if not Mediafile.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('File does not exist.')
 
-    def get_requirements(self, config_entry):
-        try:
-            mediafile = Mediafile.objects.get(pk=config_entry.get('id'))
-        except Mediafile.DoesNotExist:
-            # Mediafile does not exist. Just do nothing.
-            pass
-        else:
-            yield mediafile
-
 
 def get_projector_elements() -> Generator[Type[ProjectorElement], None, None]:
     yield MediafileSlide
diff --git a/openslides/motions/access_permissions.py b/openslides/motions/access_permissions.py
index 1abf1651d..0e5456457 100644
--- a/openslides/motions/access_permissions.py
+++ b/openslides/motions/access_permissions.py
@@ -69,18 +69,6 @@ class MotionAccessPermissions(BaseAccessPermissions):
 
         return data
 
-    def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Returns the restricted serialized data for the instance prepared
-        for the projector. Removes all comments.
-        """
-        data = []
-        for full in full_data:
-            full_copy = deepcopy(full)
-            full_copy['comments'] = []
-            data.append(full_copy)
-        return data
-
 
 class MotionChangeRecommendationAccessPermissions(BaseAccessPermissions):
     """
diff --git a/openslides/motions/projector.py b/openslides/motions/projector.py
index 474a611b7..7b56691b1 100644
--- a/openslides/motions/projector.py
+++ b/openslides/motions/projector.py
@@ -1,10 +1,8 @@
-import re
 from typing import Generator, Type
 
-from ..core.config import config
 from ..core.exceptions import ProjectorException
 from ..utils.projector import ProjectorElement
-from .models import Motion, MotionBlock, MotionChangeRecommendation, Workflow
+from .models import Motion, MotionBlock
 
 
 class MotionSlide(ProjectorElement):
@@ -17,68 +15,6 @@ class MotionSlide(ProjectorElement):
         if not Motion.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Motion does not exist.')
 
-    def get_requirements(self, config_entry):
-        try:
-            motion = Motion.objects.get(pk=config_entry.get('id'))
-        except Motion.DoesNotExist:
-            # Motion does not exist. Just do nothing.
-            pass
-        else:
-            yield motion
-            yield motion.agenda_item
-            yield motion.state.workflow
-            yield from self.required_motions_for_state_and_recommendation(motion)
-            yield from motion.get_paragraph_based_amendments()
-            for submitter in motion.submitters.all():
-                yield submitter.user
-            yield from motion.supporters.all()
-            yield from MotionChangeRecommendation.objects.filter(motion_version=motion.get_active_version().id)
-            if motion.parent:
-                yield motion.parent
-
-    def required_motions_for_state_and_recommendation(self, motion):
-        """
-        Returns a list of motions needed for the projector, because they are mentioned
-        in additional fieds for the state and recommendation.
-        Keep the motion_syntax syncronized with the MotionStateAndRecommendationParser on the client.
-        """
-        # get the comments field for state and recommendation
-        motion_syntax = re.compile(r'\[motion:(\d+)\]')
-        fields = config['motions_comments']
-        state_field_id = None
-        recommendation_field_id = None
-
-        for id, field in fields.items():
-            if isinstance(field, dict):
-                if field.get('forState', False):
-                    state_field_id = id
-                if field.get('forRecommendation', False):
-                    recommendation_field_id = id
-
-        # extract all mentioned motions from the state and recommendation
-        motion_ids = set()
-        if state_field_id is not None:
-            state_text = motion.comments.get(state_field_id)
-            motion_ids.update([int(id) for id in motion_syntax.findall(state_text)])
-
-        if recommendation_field_id is not None:
-            recommendation_text = motion.comments.get(recommendation_field_id)
-            motion_ids.update([int(id) for id in motion_syntax.findall(recommendation_text)])
-
-        # return all motions
-        return Motion.objects.filter(pk__in=motion_ids)
-
-    def get_collection_elements_required_for_this(self, collection_element, config_entry):
-        output = super().get_collection_elements_required_for_this(collection_element, config_entry)
-        # Full update if motion changes because then we may have new
-        # submitters or supporters and therefor need new users.
-        #
-        # Add some logic here if we support live changing of workflows later.
-        #
-        if collection_element.collection_string == Motion.get_collection_string() and collection_element.id == config_entry.get('id'):
-            output.extend(self.get_requirements_as_collection_elements(config_entry))
-        return output
-
     def update_data(self):
         data = None
         try:
@@ -101,26 +37,6 @@ class MotionBlockSlide(ProjectorElement):
         if not MotionBlock.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('MotionBlock does not exist.')
 
-    def get_requirements(self, config_entry):
-        try:
-            motion_block = MotionBlock.objects.get(pk=config_entry.get('id'))
-        except MotionBlock.DoesNotExist:
-            # MotionBlock does not exist. Just do nothing.
-            pass
-        else:
-            yield motion_block
-            yield motion_block.agenda_item
-            yield from motion_block.motion_set.all()
-            yield from Workflow.objects.all()
-
-    def get_collection_elements_required_for_this(self, collection_element, config_entry):
-        output = super().get_collection_elements_required_for_this(collection_element, config_entry)
-        # Send all changed motions to the projector, because it may be appended
-        # or removed from the block.
-        if collection_element.collection_string == Motion.get_collection_string():
-            output.append(collection_element)
-        return output
-
     def update_data(self):
         data = None
         try:
diff --git a/openslides/routing.py b/openslides/routing.py
index 29457c7c3..fb693c89d 100644
--- a/openslides/routing.py
+++ b/openslides/routing.py
@@ -1,7 +1,7 @@
 from channels.routing import ProtocolTypeRouter, URLRouter
 from django.conf.urls import url
 
-from openslides.utils.consumers import ProjectorConsumer, SiteConsumer
+from openslides.utils.consumers import SiteConsumer
 from openslides.utils.middleware import AuthMiddlewareStack
 
 
@@ -10,7 +10,6 @@ application = ProtocolTypeRouter({
     "websocket": AuthMiddlewareStack(
         URLRouter([
             url(r"^ws/site/$", SiteConsumer),
-            url(r"^ws/projector/(?P<projector_id>\d+)/$", ProjectorConsumer),
         ])
     )
 })
diff --git a/openslides/topics/projector.py b/openslides/topics/projector.py
index 793201de2..dfeb43ef6 100644
--- a/openslides/topics/projector.py
+++ b/openslides/topics/projector.py
@@ -15,16 +15,6 @@ class TopicSlide(ProjectorElement):
         if not Topic.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Topic does not exist.')
 
-    def get_requirements(self, config_entry):
-        try:
-            topic = Topic.objects.get(pk=config_entry.get('id'))
-        except Topic.DoesNotExist:
-            # Topic does not exist. Just do nothing.
-            pass
-        else:
-            yield topic
-            yield topic.agenda_item
-
     def update_data(self):
         data = None
         try:
diff --git a/openslides/users/access_permissions.py b/openslides/users/access_permissions.py
index 3648ca991..a7ce3cac4 100644
--- a/openslides/users/access_permissions.py
+++ b/openslides/users/access_permissions.py
@@ -99,27 +99,6 @@ class UserAccessPermissions(BaseAccessPermissions):
 
         return data
 
-    def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Returns the restricted serialized data for the instance prepared
-        for the projector. Removes several fields.
-        """
-        from .serializers import USERCANSEESERIALIZER_FIELDS
-
-        def filtered_data(full_data, whitelist):
-            """
-            Returns a new dict like full_data but only with whitelisted keys.
-            """
-            return {key: full_data[key] for key in whitelist}
-
-        # Parse data.
-        litte_data_fields = set(USERCANSEESERIALIZER_FIELDS)
-        litte_data_fields.add('groups_id')
-        litte_data_fields.discard('groups')
-        data = [filtered_data(full, litte_data_fields) for full in full_data]
-
-        return data
-
 
 class GroupAccessPermissions(BaseAccessPermissions):
     """
diff --git a/openslides/users/projector.py b/openslides/users/projector.py
index d4907b13f..dc548a562 100644
--- a/openslides/users/projector.py
+++ b/openslides/users/projector.py
@@ -15,15 +15,6 @@ class UserSlide(ProjectorElement):
         if not User.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('User does not exist.')
 
-    def get_requirements(self, config_entry):
-        try:
-            user = User.objects.get(pk=config_entry.get('id'))
-        except User.DoesNotExist:
-            # User does not exist. Just do nothing.
-            pass
-        else:
-            yield user
-
 
 def get_projector_elements() -> Generator[Type[ProjectorElement], None, None]:
     yield UserSlide
diff --git a/openslides/utils/access_permissions.py b/openslides/utils/access_permissions.py
index c9a83c4d9..309aec9ff 100644
--- a/openslides/utils/access_permissions.py
+++ b/openslides/utils/access_permissions.py
@@ -56,11 +56,3 @@ class BaseAccessPermissions:
         retrieve() or list().
         """
         return full_data if self.check_permissions(user) else []
-
-    def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Returns the serialized data for the projector. Returns an empty list if
-        the user has no access to this specific data. Returns reduced data if
-        the user has limited access. Default: Returns full data.
-        """
-        return full_data
diff --git a/openslides/utils/autoupdate.py b/openslides/utils/autoupdate.py
index 044f37a89..762075019 100644
--- a/openslides/utils/autoupdate.py
+++ b/openslides/utils/autoupdate.py
@@ -1,5 +1,4 @@
 import threading
-from collections import OrderedDict
 from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
 
 from asgiref.sync import async_to_sync
@@ -7,21 +6,10 @@ from channels.layers import get_channel_layer
 from django.db.models import Model
 
 from .cache import element_cache, get_element_id
-from .collection import CollectionElement, to_channel_message
+from .collection import CollectionElement
 
 
-def to_ordered_dict(d: Optional[Dict]) -> Optional[OrderedDict]:
-    """
-    Little helper to hash information dict in inform_*_data.
-    """
-    if isinstance(d, dict):
-        result: Optional[OrderedDict] = OrderedDict([(key, to_ordered_dict(d[key])) for key in sorted(d.keys())])
-    else:
-        result = d
-    return result
-
-
-def inform_changed_data(instances: Union[Iterable[Model], Model], information: Dict[str, Any] = None) -> None:
+def inform_changed_data(instances: Union[Iterable[Model], Model]) -> None:
     """
     Informs the autoupdate system and the caching system about the creation or
     update of an element.
@@ -41,10 +29,8 @@ def inform_changed_data(instances: Union[Iterable[Model], Model], information: D
 
     collection_elements = {}
     for root_instance in root_instances:
-        collection_element = CollectionElement.from_instance(
-            root_instance,
-            information=information)
-        key = root_instance.get_collection_string() + str(root_instance.get_rest_pk()) + str(to_ordered_dict(information))
+        collection_element = CollectionElement.from_instance(root_instance)
+        key = root_instance.get_collection_string() + str(root_instance.get_rest_pk())
         collection_elements[key] = collection_element
 
     bundle = autoupdate_bundle.get(threading.get_ident())
@@ -56,21 +42,18 @@ def inform_changed_data(instances: Union[Iterable[Model], Model], information: D
         async_to_sync(send_autoupdate)(collection_elements.values())
 
 
-def inform_deleted_data(elements: Iterable[Tuple[str, int]], information: Dict[str, Any] = None) -> None:
+def inform_deleted_data(elements: Iterable[Tuple[str, int]]) -> None:
     """
     Informs the autoupdate system and the caching system about the deletion of
     elements.
-
-    The argument information is added to each collection element.
     """
     collection_elements: Dict[str, Any] = {}
     for element in elements:
         collection_element = CollectionElement.from_values(
             collection_string=element[0],
             id=element[1],
-            deleted=True,
-            information=information)
-        key = element[0] + str(element[1]) + str(to_ordered_dict(information))
+            deleted=True)
+        key = element[0] + str(element[1])
         collection_elements[key] = collection_element
 
     bundle = autoupdate_bundle.get(threading.get_ident())
@@ -82,15 +65,14 @@ def inform_deleted_data(elements: Iterable[Tuple[str, int]], information: Dict[s
         async_to_sync(send_autoupdate)(collection_elements.values())
 
 
-def inform_data_collection_element_list(collection_elements: List[CollectionElement],
-                                        information: Dict[str, Any] = None) -> None:
+def inform_data_collection_element_list(collection_elements: List[CollectionElement]) -> None:
     """
     Informs the autoupdate system about some collection elements. This is
     used just to send some data to all users.
     """
     elements = {}
     for collection_element in collection_elements:
-        key = collection_element.collection_string + str(collection_element.id) + str(to_ordered_dict(information))
+        key = collection_element.collection_string + str(collection_element.id)
         elements[key] = collection_element
 
     bundle = autoupdate_bundle.get(threading.get_ident())
@@ -148,14 +130,6 @@ async def send_autoupdate(collection_elements: Iterable[CollectionElement]) -> N
         change_id = await element_cache.change_elements(cache_elements)
 
         channel_layer = get_channel_layer()
-        # TODO: don't await. They can be send in parallel
-        await channel_layer.group_send(
-            "projector",
-            {
-                "type": "send_data",
-                "message": to_channel_message(collection_elements),
-            },
-        )
         await channel_layer.group_send(
             "autoupdate",
             {
diff --git a/openslides/utils/collection.py b/openslides/utils/collection.py
index 362ecbc1d..b7b3f08d9 100644
--- a/openslides/utils/collection.py
+++ b/openslides/utils/collection.py
@@ -1,14 +1,4 @@
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Dict,
-    Generator,
-    Iterable,
-    List,
-    Optional,
-    Type,
-    cast,
-)
+from typing import TYPE_CHECKING, Any, Dict, Generator, List, Optional, Type
 
 from asgiref.sync import async_to_sync
 from django.apps import apps
@@ -34,46 +24,15 @@ AutoupdateFormat = TypedDict(
 )
 
 
-AutoupdateFormatOld = TypedDict(
-    'AutoupdateFormatOld',
-    {
-        'collection': str,
-        'id': int,
-        'action': 'str',
-        'data': Dict[str, Any],
-    },
-    total=False,
-)
-
-InnerChannelMessageFormat = TypedDict(
-    'InnerChannelMessageFormat',
-    {
-        'collection_string': str,
-        'id': int,
-        'deleted': bool,
-        'information': Dict[str, Any],
-        'full_data': Optional[Dict[str, Any]],
-    }
-)
-
-ChannelMessageFormat = TypedDict(
-    'ChannelMessageFormat',
-    {
-        'elements': List[InnerChannelMessageFormat],
-    }
-)
-
-
 class CollectionElement:
     def __init__(self, instance: Model = None, deleted: bool = False, collection_string: str = None,
-                 id: int = None, full_data: Dict[str, Any] = None, information: Dict[str, Any] = None) -> None:
+                 id: int = None, full_data: Dict[str, Any] = None) -> None:
         """
         Do not use this. Use the methods from_instance() or from_values().
         """
         self.instance = instance
         self.deleted = deleted
         self.full_data = full_data
-        self.information = information or {}
         if instance is not None:
             # Collection element is created via instance
             self.collection_string = instance.get_collection_string()
@@ -93,7 +52,7 @@ class CollectionElement:
 
     @classmethod
     def from_instance(
-            cls, instance: Model, deleted: bool = False, information: Dict[str, Any] = None) -> 'CollectionElement':
+            cls, instance: Model, deleted: bool = False) -> 'CollectionElement':
         """
         Returns a collection element from a database instance.
 
@@ -101,11 +60,11 @@ class CollectionElement:
 
         If deleted is set to True, the element is deleted from the cache.
         """
-        return cls(instance=instance, deleted=deleted, information=information)
+        return cls(instance=instance, deleted=deleted)
 
     @classmethod
     def from_values(cls, collection_string: str, id: int, deleted: bool = False,
-                    full_data: Dict[str, Any] = None, information: Dict[str, Any] = None) -> 'CollectionElement':
+                    full_data: Dict[str, Any] = None) -> 'CollectionElement':
         """
         Returns a collection element from a collection_string and an id.
 
@@ -114,8 +73,7 @@ class CollectionElement:
         With the argument full_data, the content of the CollectionElement can be set.
         It has to be a dict in the format that is used be access_permission.get_full_data().
         """
-        return cls(collection_string=collection_string, id=id, deleted=deleted,
-                   full_data=full_data, information=information)
+        return cls(collection_string=collection_string, id=id, deleted=deleted, full_data=full_data)
 
     def __eq__(self, collection_element: 'CollectionElement') -> bool:  # type: ignore
         """
@@ -127,23 +85,6 @@ class CollectionElement:
         return (self.collection_string == collection_element.collection_string and
                 self.id == collection_element.id)
 
-    def as_autoupdate_for_projector(self) -> AutoupdateFormatOld:
-        """
-        Returns a dict that can be sent through the autoupdate system for the
-        projector.
-        """
-        if not self.is_deleted():
-            restricted_data = self.get_access_permissions().get_projector_data([self.get_full_data()])
-            data = restricted_data[0] if restricted_data else None
-        else:
-            data = None
-
-        return format_for_autoupdate_old(
-            collection_string=self.collection_string,
-            id=self.id,
-            action='deleted' if self.is_deleted() else 'changed',
-            data=data)
-
     def as_dict_for_user(self, user: Optional['CollectionElement']) -> Optional[Dict[str, Any]]:
         """
         Returns a dict with the data for a user. Can be used for the rest api.
@@ -329,57 +270,3 @@ def get_model_from_collection_string(collection_string: str) -> Type[Model]:
     except KeyError:
         raise ValueError('Invalid message. A valid collection_string is missing.')
     return model
-
-
-def format_for_autoupdate_old(
-        collection_string: str, id: int, action: str, data: Dict[str, Any] = None) -> AutoupdateFormatOld:
-    """
-    Returns a dict that can be used for autoupdate.
-
-    This is depricated. Use format_for_autoupdate.
-    """
-    if data is None:
-        # If the data is None then the action has to be deleted,
-        # even when it says diffrently. This can happen when the object is not
-        # deleted, but the user has no permission to see it.
-        action = 'deleted'
-
-    output = AutoupdateFormatOld(
-        collection=collection_string,
-        id=id,
-        action=action,
-    )
-
-    if action != 'deleted':
-        data = cast(Dict[str, Any], data)  # In this case data can not be None
-        output['data'] = data
-
-    return output
-
-
-def to_channel_message(elements: Iterable[CollectionElement]) -> ChannelMessageFormat:
-    """
-    Converts a list of collection elements to a dict, that can be send to the
-    channels system.
-    """
-    output = []
-    for element in elements:
-        output.append(InnerChannelMessageFormat(
-            collection_string=element.collection_string,
-            id=element.id,
-            deleted=element.is_deleted(),
-            information=element.information,
-            full_data=element.full_data,
-        ))
-    return ChannelMessageFormat(elements=output)
-
-
-def from_channel_message(message: ChannelMessageFormat) -> List[CollectionElement]:
-    """
-    Converts a list of collection elements back from a dict, that was created
-    via to_channel_message.
-    """
-    elements = []
-    for value in message['elements']:
-        elements.append(CollectionElement.from_values(**value))
-    return elements
diff --git a/openslides/utils/consumers.py b/openslides/utils/consumers.py
index 2a01b6ce0..88c3818d5 100644
--- a/openslides/utils/consumers.py
+++ b/openslides/utils/consumers.py
@@ -2,20 +2,9 @@ from collections import defaultdict
 from typing import Any, Dict, List
 from urllib.parse import parse_qs
 
-from asgiref.sync import sync_to_async
-from channels.db import database_sync_to_async
-
-from ..core.config import config
-from ..core.models import Projector
-from .auth import async_anonymous_is_enabled, has_perm
+from .auth import async_anonymous_is_enabled
 from .cache import element_cache, split_element_id
-from .collection import (
-    AutoupdateFormat,
-    Collection,
-    CollectionElement,
-    format_for_autoupdate_old,
-    from_channel_message,
-)
+from .collection import AutoupdateFormat
 from .websocket import ProtocollAsyncJsonWebsocketConsumer, get_element_data
 
 
@@ -72,13 +61,11 @@ class SiteConsumer(ProtocollAsyncJsonWebsocketConsumer):
         for item in event['incomming']:
             users = item.get('users')
             reply_channels = item.get('replyChannels')
-            projectors = item.get('projectors')
             if ((isinstance(users, list) and user_id in users)
                     or (isinstance(reply_channels, list) and self.channel_name in reply_channels)
-                    or (users is None and reply_channels is None and projectors is None)):
+                    or users is None and reply_channels is None):
                 item['senderReplyChannelName'] = event.get('senderReplyChannelName')
                 item['senderUserId'] = event.get('senderUserId')
-                item['senderProjectorId'] = event.get('senderProjectorId')
                 out.append(item)
 
         if out:
@@ -101,153 +88,3 @@ class SiteConsumer(ProtocollAsyncJsonWebsocketConsumer):
             from_change_id=change_id,
             to_change_id=change_id,
             all_data=False))
-
-
-class ProjectorConsumer(ProtocollAsyncJsonWebsocketConsumer):
-    """
-    Websocket Consumer for the projector.
-    """
-
-    groups = ['projector']
-
-    async def connect(self) -> None:
-        """
-        Adds the websocket connection to a group specific to the projector with the given id.
-        Also sends all data that are shown on the projector.
-        """
-        user = self.scope['user']
-        projector_id = self.scope["url_route"]["kwargs"]["projector_id"]
-        await self.accept()
-
-        if not await database_sync_to_async(has_perm)(user, 'core.can_see_projector'):
-            await self.send_json(type='error', content='No permissions to see this projector.')
-            # TODO: Shouldend we just close the websocket connection with an error message?
-            #       self.close(code=4403)
-        else:
-            out = await sync_to_async(projector_startup_data)(projector_id)
-            await self.send_json(type='autoupdate', content=out)
-
-    async def receive_content(self, type: str, content: Any, id: str) -> None:
-        """
-        If we recieve something from the client we currently just interpret this
-        as a notify message.
-
-        The server adds the sender's user id (0 for anonymous) and reply
-        channel name so that a receiver client may reply to the sender or to all
-        sender's instances.
-        """
-        projector_id = self.scope["url_route"]["kwargs"]["projector_id"]
-        await self.channel_layer.group_send(
-            "projector",
-            {
-                "type": "send_notify",
-                "incomming": content,
-                "senderReplyChannelName": self.channel_name,
-                "senderProjectorId": projector_id,
-            },
-        )
-        await self.channel_layer.group_send(
-            "site",
-            {
-                "type": "send_notify",
-                "incomming": content,
-                "senderReplyChannelName": self.channel_name,
-                "senderProjectorId": projector_id,
-            },
-        )
-
-    async def send_notify(self, event: Dict[str, Any]) -> None:
-        """
-        Send a notify message to the projector.
-        """
-        projector_id = self.scope["url_route"]["kwargs"]["projector_id"]
-
-        out = []
-        for item in event['incomming']:
-            users = item.get('users')
-            reply_channels = item.get('replyChannels')
-            projectors = item.get('projectors')
-            if ((isinstance(projectors, list) and projector_id in projectors)
-                    or (isinstance(reply_channels, list) and self.channel_name in reply_channels)
-                    or (users is None and reply_channels is None and projectors is None)):
-                item['senderReplyChannelName'] = event.get('senderReplyChannelName')
-                item['senderUserId'] = event.get('senderUserId')
-                item['senderProjectorId'] = event.get('senderProjectorId')
-                out.append(item)
-
-        if out:
-            await self.send_json(type='notify', content=out)
-
-    async def send_data(self, event: Dict[str, Any]) -> None:
-        """
-        Informs all projector clients about changed data.
-        """
-        projector_id = self.scope["url_route"]["kwargs"]["projector_id"]
-        collection_elements = from_channel_message(event['message'])
-
-        output = await projector_sync_send_data(projector_id, collection_elements)
-        if output:
-            await self.send_json(type='autoupdate', content=output)
-
-
-def projector_startup_data(projector_id: int) -> Any:
-    """
-    Generate the startup data for a projector.
-    """
-    try:
-        projector = Projector.objects.get(pk=projector_id)
-    except Projector.DoesNotExist:
-        return {'text': 'The projector {} does not exist.'.format(projector_id)}
-    else:
-        # Now check whether broadcast is active at the moment. If yes,
-        # change the local projector variable.
-        if config['projector_broadcast'] > 0:
-            projector = Projector.objects.get(pk=config['projector_broadcast'])
-
-        # Collect all elements that are on the projector.
-        output = []
-        for requirement in projector.get_all_requirements():
-            required_collection_element = CollectionElement.from_instance(requirement)
-            output.append(required_collection_element.as_autoupdate_for_projector())
-
-        # Collect all config elements.
-        config_collection = Collection(config.get_collection_string())
-        projector_data = (config_collection.get_access_permissions()
-                          .get_projector_data(config_collection.get_full_data()))
-        for data in projector_data:
-            output.append(format_for_autoupdate_old(
-                config_collection.collection_string,
-                data['id'],
-                'changed',
-                data))
-
-        # Collect the projector instance.
-        collection_element = CollectionElement.from_instance(projector)
-        output.append(collection_element.as_autoupdate_for_projector())
-
-        # Send all the data that were only collected before.
-        return output
-
-
-@sync_to_async
-def projector_sync_send_data(projector_id: int, collection_elements: List[CollectionElement]) -> List[Any]:
-    """
-    sync function that generates the elements for an projector.
-    """
-    # Load the projector object. If broadcast is on, use the broadcast projector
-    # instead.
-    if config['projector_broadcast'] > 0:
-        projector_id = config['projector_broadcast']
-
-    projector = Projector.objects.get(pk=projector_id)
-
-    # TODO: This runs once for every open projector tab. Either use
-    #       caching or something else, so this is only called once
-    output = []
-    for collection_element in collection_elements:
-        if collection_element.is_deleted():
-            output.append(collection_element.as_autoupdate_for_projector())
-        else:
-            for element in projector.get_collection_elements_required_for_this(collection_element):
-                output.append(element.as_autoupdate_for_projector())
-    return output
diff --git a/openslides/utils/models.py b/openslides/utils/models.py
index 8cdb92396..f37b95b74 100644
--- a/openslides/utils/models.py
+++ b/openslides/utils/models.py
@@ -72,7 +72,7 @@ class RESTModelMixin:
         """
         return self.pk  # type: ignore
 
-    def save(self, skip_autoupdate: bool = False, information: Dict[str, str] = None, *args: Any, **kwargs: Any) -> Any:
+    def save(self, skip_autoupdate: bool = False, *args: Any, **kwargs: Any) -> Any:
         """
         Calls Django's save() method and afterwards hits the autoupdate system.
 
@@ -82,18 +82,15 @@ class RESTModelMixin:
         element from the instance:
 
         CollectionElement.from_instance(instance)
-
-        The optional argument information can be a dictionary that is given to
-        the autoupdate system.
         """
         # We don't know how to fix this circular import
         from .autoupdate import inform_changed_data
         return_value = super().save(*args, **kwargs)  # type: ignore
         if not skip_autoupdate:
-            inform_changed_data(self.get_root_rest_element(), information=information)
+            inform_changed_data(self.get_root_rest_element())
         return return_value
 
-    def delete(self, skip_autoupdate: bool = False, information: Dict[str, str] = None, *args: Any, **kwargs: Any) -> Any:
+    def delete(self, skip_autoupdate: bool = False, *args: Any, **kwargs: Any) -> Any:
         """
         Calls Django's delete() method and afterwards hits the autoupdate system.
 
@@ -107,9 +104,6 @@ class RESTModelMixin:
         or
 
         CollectionElement.from_values(collection_string, id, deleted=True)
-
-        The optional argument information can be a dictionary that is given to
-        the autoupdate system.
         """
         # We don't know how to fix this circular import
         from .autoupdate import inform_changed_data, inform_deleted_data
@@ -118,9 +112,9 @@ class RESTModelMixin:
         if not skip_autoupdate:
             if self != self.get_root_rest_element():
                 # The deletion of a included element is a change of the root element.
-                inform_changed_data(self.get_root_rest_element(), information=information)
+                inform_changed_data(self.get_root_rest_element())
             else:
-                inform_deleted_data([(self.get_collection_string(), instance_pk)], information=information)
+                inform_deleted_data([(self.get_collection_string(), instance_pk)])
         return return_value
 
     @classmethod
diff --git a/openslides/utils/projector.py b/openslides/utils/projector.py
index 14db3d7da..8975adecf 100644
--- a/openslides/utils/projector.py
+++ b/openslides/utils/projector.py
@@ -1,6 +1,4 @@
-from typing import Any, Dict, Generator, Iterable, List, Optional, Type
-
-from .collection import CollectionElement
+from typing import Any, Dict, Generator, Optional, Type
 
 
 class ProjectorElement:
@@ -45,44 +43,6 @@ class ProjectorElement:
         """
         pass
 
-    def get_requirements(self, config_entry: Any) -> Iterable[Any]:
-        """
-        Returns an iterable of instances that are required for this projector
-        element. The config_entry has to be given.
-        """
-        return ()
-
-    def get_requirements_as_collection_elements(self, config_entry: Any) -> Iterable[CollectionElement]:
-        """
-        Returns an iterable of collection elements that are required for this
-        projector element. The config_entry has to be given.
-        """
-        return (CollectionElement.from_instance(instance) for instance in self.get_requirements(config_entry))
-
-    def get_collection_elements_required_for_this(
-            self, collection_element: CollectionElement,
-            config_entry: Any) -> List[CollectionElement]:
-        """
-        Returns a list of CollectionElements that have to be sent to every
-        projector that shows this projector element according to the given
-        collection_element.
-
-        Default: Returns only the collection_element if it belongs to the
-        requirements but return all requirements if the projector changes.
-        """
-        requirements_as_collection_elements = list(self.get_requirements_as_collection_elements(config_entry))
-        for requirement in requirements_as_collection_elements:
-            if collection_element == requirement:
-                output = [collection_element]
-                break
-        else:
-            if collection_element.information.get('this_projector'):
-                output = [collection_element]
-                output.extend(requirements_as_collection_elements)
-            else:
-                output = []
-        return output
-
 
 projector_elements: Dict[str, ProjectorElement] = {}
 
diff --git a/tests/unit/users/test_access_permissions.py b/tests/unit/users/test_access_permissions.py
index c96ed1f7e..1561c7a84 100644
--- a/tests/unit/users/test_access_permissions.py
+++ b/tests/unit/users/test_access_permissions.py
@@ -1,48 +1,9 @@
 from unittest import TestCase
 
-from openslides.users.access_permissions import (
-    PersonalNoteAccessPermissions,
-    UserAccessPermissions,
-)
+from openslides.users.access_permissions import PersonalNoteAccessPermissions
 from openslides.utils.collection import CollectionElement
 
 
-class UserGetProjectorDataTest(TestCase):
-    def test_get_projector_data_with_collection(self):
-        """
-        This test ensures that comment field is removed.
-        """
-        full_data = {
-            'id': 42,
-            'username': 'username_ai3Oofu7eit0eeyu1sie',
-            'title': '',
-            'first_name': 'first_name_iu8toShae0oolie8aevo',
-            'last_name': 'last_name_OhZ4beezohY0doNoh2th',
-            'structure_level': '',
-            'number': '',
-            'about_me': '',
-            'groups_id': [],
-            'is_present': False,
-            'is_committee': False,
-            'comment': 'comment_gah7aipeJohv9xethoku',
-        }
-
-        data = UserAccessPermissions().get_projector_data([full_data])
-        self.assertEqual(data[0], {
-            'id': 42,
-            'username': 'username_ai3Oofu7eit0eeyu1sie',
-            'title': '',
-            'first_name': 'first_name_iu8toShae0oolie8aevo',
-            'last_name': 'last_name_OhZ4beezohY0doNoh2th',
-            'structure_level': '',
-            'number': '',
-            'about_me': '',
-            'groups_id': [],
-            'is_present': False,
-            'is_committee': False,
-        })
-
-
 class TestPersonalNoteAccessPermissions(TestCase):
     def test_get_restricted_data(self):
         ap = PersonalNoteAccessPermissions()
@@ -54,9 +15,6 @@ class TestPersonalNoteAccessPermissions(TestCase):
     def test_get_restricted_data_for_anonymous(self):
         ap = PersonalNoteAccessPermissions()
         rd = ap.get_restricted_data(
-            [CollectionElement.from_values(
-                'users/personal_note',
-                1,
-                full_data={'user_id': 1}).get_full_data()],
+            [{'user_id': 1}],
             None)
         self.assertEqual(rd, [])
diff --git a/tests/unit/utils/test_collection.py b/tests/unit/utils/test_collection.py
index b6ea72f7f..0485f170b 100644
--- a/tests/unit/utils/test_collection.py
+++ b/tests/unit/utils/test_collection.py
@@ -24,25 +24,6 @@ class TestCollectionElement(TestCase):
         self.assertEqual(collection_element.collection_string, 'testmodule/model')
         self.assertEqual(collection_element.id, 42)
 
-    def test_channel_message(self):
-        """
-        Test that to_channel_message works together with from_channel_message.
-        """
-        collection_element = collection.CollectionElement.from_values(
-            'testmodule/model',
-            42,
-            full_data={'data': 'value'},
-            information={'some': 'information'})
-
-        created_collection_element = collection.from_channel_message(
-            collection.to_channel_message([collection_element]))[0]
-
-        self.assertEqual(
-            collection_element,
-            created_collection_element)
-        self.assertEqual(created_collection_element.full_data, {'data': 'value'})
-        self.assertEqual(created_collection_element.information, {'some': 'information'})
-
     @patch.object(collection.CollectionElement, 'get_full_data')
     def test_equal(self, mock_get_full_data):
         self.assertEqual(