@reactivex/ix-esnext-esm/asynciterable/generatetime.js

The Interactive Extensions for JavaScript

import { AsyncIterableX } from './asynciterablex';
import { sleep } from './_sleep';
import { throwIfAborted } from '../aborterror';
class GenerateTimeAsyncIterable extends AsyncIterableX {
    constructor(initialState, condition, iterate, resultSelector, timeSelector) {
        super();
        this._initialState = initialState;
        this._condition = condition;
        this._iterate = iterate;
        this._resultSelector = resultSelector;
        this._timeSelector = timeSelector;
    }
    async *[Symbol.asyncIterator](signal) {
        throwIfAborted(signal);
        for (let i = this._initialState; await this._condition(i, signal); i = await this._iterate(i, signal)) {
            const time = await this._timeSelector(i, signal);
            await sleep(time, signal);
            yield await this._resultSelector(i, signal);
        }
    }
}
/**
 * Generates an async-iterable sequence by running a time-based state-driven loop producing the sequence's elements.
 *
 * @export
 * @template TState The type of the state used in the generator loop.
 * @template TResult The type of the elements in the produced sequence.
 * @param {TState} initialState The initial state.
 * @param {((value: TState, signal?: AbortSignal) => boolean | Promise<boolean>)} condition Condition to terminate generation (upon returning false).
 * @param {((value: TState, signal?: AbortSignal) => TState | Promise<TState>)} iterate Iteration step function.
 * @param {((value: TState, signal?: AbortSignal) => TResult | Promise<TResult>)} resultSelector Selector function for results produced in
 * the sequence.
 * @param {((value: TState, signal?: AbortSignal) => number | Promise<number>)} timeSelector Selector function for how much time to wait.
 * @returns {AsyncIterableX<TResult>} The generated async-iterable sequence.
 */
export function generateTime(initialState, condition, iterate, resultSelector, timeSelector) {
    return new GenerateTimeAsyncIterable(initialState, condition, iterate, resultSelector, timeSelector);
}

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