(event, fn, onsubscribe = noop, onerror = noop)
| 49 | return subscribe |
| 50 | |
| 51 | async function subscribe(event, fn, onsubscribe = noop, onerror = noop) { |
| 52 | event = parseEvent(event) |
| 53 | |
| 54 | if (!connection) |
| 55 | connection = init(sql, slot, options.publications) |
| 56 | |
| 57 | const subscriber = { fn, onsubscribe } |
| 58 | const fns = subscribers.has(event) |
| 59 | ? subscribers.get(event).add(subscriber) |
| 60 | : subscribers.set(event, new Set([subscriber])).get(event) |
| 61 | |
| 62 | const unsubscribe = () => { |
| 63 | fns.delete(subscriber) |
| 64 | fns.size === 0 && subscribers.delete(event) |
| 65 | } |
| 66 | |
| 67 | return connection.then(x => { |
| 68 | connected(x) |
| 69 | onsubscribe() |
| 70 | stream && stream.on('error', onerror) |
| 71 | return { unsubscribe, state, sql } |
| 72 | }) |
| 73 | } |
| 74 | |
| 75 | function connected(x) { |
| 76 | stream = x.stream |
nothing calls this directly
no test coverage detected