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Beamer Live Updates

Beamer/projector live updates are backend-owned and use Rails ActionCable at /cable.

Goal

Frontend fullscreen pages talk only to turniere-backend. No TURNIERE_MATCH_URL. No Socket.IO dependency on turniere-match.

Transport

websocket endpoint: GET /cable
ActionCable channel: TournamentBeamersChannel
subscription params:
- tournament_id
- beamer_name

If requested beamer does not exist, channel falls back to tournament default beamer when present.

Payload contract

Initial subscribe snapshot:

{
  "type": "beamer.snapshot",
  "event": "snapshot",
  "tournament_id": 12,
  "beamer": {
    "id": 34,
    "name": "default",
    "display_state": "matches_all",
    "qr_code_url": null,
    "logo_url": null
  }
}

Mutation events use same beamer shape with type / event values:

beamer.created
beamer.updated
beamer.deleted

Broadcast source

Broadcasts come from Beamer model commit callbacks. That means normal HTTP writes and follower-sync imports use same broadcast path.

Covered mutations:

create
update
delete

Frontend expectation

Frontend should:

fetch beamer config from backend REST API
subscribe to TournamentBeamersChannel
update fullscreen state from explicit beamer payload
reconnect if beamer name changes or current beamer gets deleted

1.3 KiB Raw Blame History