Anonymous user

[Elblinator]

see for context: OpenSlides/OpenSlides#6798

Wanted behaviour
We want to enable anonymous users for meetings

• if you are using OS as an anonymous then the backend should throw 400 responses

• A new setting inside of a meeting is needed (e.g. enable_anonymous_user)

• If that setting is activated for the first time then a new group, which is not deletable, should be created, it's name should be be "Anonymous"

• This group should then stay existing even if the setting is deactivated

• Another setting locked_from_inside and this new setting are not allowed to be true at the same time, the backend should thrown an Error if someone tries to activate them at the same time (sth along the lines of Locking a meeting from the inside and activating anonymous user is not allowed at the same time, please deactivate one setting)

[bastianjoel]

We also need an additional field public_meeting_ids in organization with restriction mode A which contains all publicly accessible meetings or something similar.

We might need to discuss that.

[Elblinator]

Read permissions which anonymous should be able to get:
- agendaItemCanSee = agenda_item.can_see,
- agendaItemCanSeeInternal = agenda_item.can_see_internal,
- agendaItemCanSeeModeratorNotes = agenda_item.can_see_moderator_notes,
- assignmentCanSee = assignment.can_see,
- listOfSpeakersCanSee = list_of_speakers.can_see,
- mediafileCanSee = mediafile.can_see,
- meetingCanSeeAutopilot = meeting.can_see_autopilot,
- meetingCanSeeFrontpage = meeting.can_see_frontpage,
- meetingCanSeeHistory = meeting.can_see_history,
- meetingCanSeeLivestream = meeting.can_see_livestream,

• motionCanSee = motion.can_see,
• motionCanSeeInternal = motion.can_see_internal,
• projectorCanSee = projector.can_see,
  - userCanSee = user.can_see,
  - userCanSeeSensitiveData = user.can_see_sensitive_data,