StationItemState

Where an item of the running order has got to. handed is a promise and airing is a fact, which is the distinction everything here is built around. The three terminal states that are not played are three different facts on a page that has to say why the station is silent: skipped is the station passing over an item it reached, removed is an operator taking one out before its turn, and unavailable is a record the station could not obtain the audio for — the only one of the three an operator can act on, since it names a copy rather than a decision

type StationItemState = 'planned' | 'handed' | 'airing' | 'played' | 'skipped' | 'unavailable' | 'removed';