/** "Занятия в Полоцке" as the parser keeps it: a day of a group, or of some of its subgroups. */
export interface PlaceNote {
  day: number;
  date: string | null;
  groups: string[];
  subgroups: { group: string; label: string }[];
  place: string;
  text: string;
}
/** A note of one day for one group; `subgroup` null for the whole group. */
export interface DayPlace {
  place: string;
  text: string;
  subgroup: string | null;
}
export function placesOn(
  places: PlaceNote[] | null | undefined,
  group: string,
  labels: string[],
  day: number,
  date?: string | null,
): DayPlace[];
export function placesFor(list: DayPlace[], subgroup: string | null | undefined): DayPlace[];