video-ad-sdk/dist/vastRequest/requestNextAd.js

VAST/VPAID SDK that allows video ads to be played on top of any player

import { getVASTAdTagURI, isWrapper } from '../vastSelectors';
import { requestAd } from './requestAd';
import { getNextAd } from './helpers/getNextAd';
import { markAdAsRequested } from './helpers/adUtils';
const validateChain = (vastChain) => {
    if (!Array.isArray(vastChain)) {
        throw new TypeError('Invalid VAST chain');
    }
    if (vastChain.length === 0) {
        throw new Error('No next ad to request');
    }
};
/**
 * Requests the next ad in the VAST Chain.
 *
 * @param vastChain Array of {@link VastResponse}.
 * @param options Options Map. The allowed properties are:
 * @returns Returns a Promise that will resolve with a VastChain with the newest VAST response at the beginning of the array.
 * If the {@link VastChain} had an error. The first VAST response of the array will contain an error and an errorCode entry.
 */
export const requestNextAd = (vastChain, options) => {
    validateChain(vastChain);
    const [vastResponse] = vastChain;
    const nextAd = getNextAd(vastResponse, options);
    if (nextAd) {
        const newVastResponse = Object.assign(Object.assign({}, vastResponse), { ad: nextAd });
        const newVastChain = [newVastResponse, ...vastChain.slice(1)];
        markAdAsRequested(nextAd);
        if (isWrapper(nextAd)) {
            return requestAd(getVASTAdTagURI(nextAd), options, newVastChain);
        }
        return Promise.resolve(newVastChain);
    }
    return requestNextAd(vastChain.slice(1), options);
};