import { Observable } from '../Observable'; import { identity } from '../util/identity'; import { isScheduler } from '../util/isScheduler'; export function generate(initialStateOrOptions, condition, iterate, resultSelectorOrObservable, scheduler) { let resultSelector; let initialState; if (arguments.length == 1) { const options = initialStateOrOptions; initialState = options.initialState; condition = options.condition; iterate = options.iterate; resultSelector = options.resultSelector || identity; scheduler = options.scheduler; } else if (resultSelectorOrObservable === undefined || isScheduler(resultSelectorOrObservable)) { initialState = initialStateOrOptions; resultSelector = identity; scheduler = resultSelectorOrObservable; } else { initialState = initialStateOrOptions; resultSelector = resultSelectorOrObservable; } return new Observable(subscriber => { let state = initialState; if (scheduler) { return scheduler.schedule(dispatch, 0, { subscriber, iterate, condition, resultSelector, state }); } do { if (condition) { let conditionResult; try { conditionResult = condition(state); } catch (err) { subscriber.error(err); return undefined; } if (!conditionResult) { subscriber.complete(); break; } } let value; try { value = resultSelector(state); } catch (err) { subscriber.error(err); return undefined; } subscriber.next(value); if (subscriber.closed) { break; } try { state = iterate(state); } catch (err) { subscriber.error(err); return undefined; } } while (true); return undefined; }); } function dispatch(state) { const { subscriber, condition } = state; if (subscriber.closed) { return undefined; } if (state.needIterate) { try { state.state = state.iterate(state.state); } catch (err) { subscriber.error(err); return undefined; } } else { state.needIterate = true; } if (condition) { let conditionResult; try { conditionResult = condition(state.state); } catch (err) { subscriber.error(err); return undefined; } if (!conditionResult) { subscriber.complete(); return undefined; } if (subscriber.closed) { return undefined; } } let value; try { value = state.resultSelector(state.state); } catch (err) { subscriber.error(err); return undefined; } if (subscriber.closed) { return undefined; } subscriber.next(value); if (subscriber.closed) { return undefined; } return this.schedule(state); } //# sourceMappingURL=generate.js.map