cinny/src/app/utils/callRing.ts

import { JoinRule, Room } from 'matrix-js-sdk';
import { StateEvent } from '../../types/matrix/room';
import { getStateEvents } from './room';

/**
 * Whether a call notification in this room may ring — and, by the same rule,
 * whether an unanswered one may show as "Missed call" (Gitea #162 follow-up).
 * Only DMs and invite-only groups outside any space ring, i.e. rooms where the
 * call button is shown. Persistent voice rooms, space channels, restricted and
 * public rooms never do: joining a voice channel alone is normal and isn't a
 * "call" anyone missed.
 */
export const isRingableRoom = (room: Room, isDirect: boolean): boolean => {
  if (room.isCallRoom()) return false;
  if (isDirect) return true;
  const isSpaceChild = getStateEvents(room, StateEvent.SpaceParent).length > 0;
  return !isSpaceChild && room.getJoinRule() === JoinRule.Invite;
};