575 lines
20 KiB
JavaScript
575 lines
20 KiB
JavaScript
// ==========================================================================
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// Advertisement plugin using Google IMA HTML5 SDK
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// Create an account with our ad partner, vi here:
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// https://www.vi.ai/publisher-video-monetization/
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// ==========================================================================
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/* global google */
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import utils from '../utils';
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class Ads {
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/**
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* Ads constructor.
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* @param {object} player
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* @return {Ads}
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*/
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constructor(player) {
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this.player = player;
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this.publisherId = player.config.ads.publisherId;
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this.enabled = player.isHTML5 && player.isVideo && player.config.ads.enabled && utils.is.string(this.publisherId) && this.publisherId.length;
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this.playing = false;
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this.initialized = false;
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this.elements = {
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container: null,
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displayContainer: null,
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};
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this.manager = null;
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this.loader = null;
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this.cuePoints = null;
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this.events = {};
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this.safetyTimer = null;
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this.countdownTimer = null;
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// Setup a promise to resolve when the IMA manager is ready
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this.managerPromise = new Promise((resolve, reject) => {
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// The ad is loaded and ready
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this.on('loaded', resolve);
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// Ads failed
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this.on('error', reject);
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});
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this.load();
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}
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/**
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* Load the IMA SDK
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*/
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load() {
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if (this.enabled) {
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// Check if the Google IMA3 SDK is loaded or load it ourselves
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if (!utils.is.object(window.google) || !utils.is.object(window.google.ima)) {
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utils
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.loadScript(this.player.config.urls.googleIMA.api)
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.then(() => {
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this.ready();
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})
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.catch(() => {
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// Script failed to load or is blocked
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this.trigger('error', new Error('Google IMA SDK failed to load'));
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});
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} else {
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this.ready();
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}
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}
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}
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/**
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* Get the ads instance ready
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*/
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ready() {
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// Start ticking our safety timer. If the whole advertisement
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// thing doesn't resolve within our set time; we bail
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this.startSafetyTimer(12000, 'ready()');
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// Clear the safety timer
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this.managerPromise.then(() => {
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this.clearSafetyTimer('onAdsManagerLoaded()');
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});
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// Set listeners on the Plyr instance
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this.listeners();
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// Setup the IMA SDK
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this.setupIMA();
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}
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// Build the default tag URL
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get tagUrl() {
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const params = {
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AV_PUBLISHERID: '58c25bb0073ef448b1087ad6',
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AV_CHANNELID: '5a0458dc28a06145e4519d21',
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AV_URL: location.hostname,
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cb: Date.now(),
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AV_WIDTH: 640,
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AV_HEIGHT: 480,
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AV_CDIM2: this.publisherId,
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};
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const base = 'https://go.aniview.com/api/adserver6/vast/';
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return `${base}?${utils.buildUrlParams(params)}`;
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}
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/**
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* In order for the SDK to display ads for our video, we need to tell it where to put them,
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* so here we define our ad container. This div is set up to render on top of the video player.
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* Using the code below, we tell the SDK to render ads within that div. We also provide a
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* handle to the content video player - the SDK will poll the current time of our player to
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* properly place mid-rolls. After we create the ad display container, we initialize it. On
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* mobile devices, this initialization is done as the result of a user action.
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*/
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setupIMA() {
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// Create the container for our advertisements
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this.elements.container = utils.createElement('div', {
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class: this.player.config.classNames.ads,
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});
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this.player.elements.container.appendChild(this.elements.container);
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// So we can run VPAID2
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google.ima.settings.setVpaidMode(google.ima.ImaSdkSettings.VpaidMode.ENABLED);
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// Set language
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google.ima.settings.setLocale(this.player.config.ads.language);
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// We assume the adContainer is the video container of the plyr element
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// that will house the ads
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this.elements.displayContainer = new google.ima.AdDisplayContainer(this.elements.container);
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// Request video ads to be pre-loaded
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this.requestAds();
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}
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/**
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* Request advertisements
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*/
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requestAds() {
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const { container } = this.player.elements;
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try {
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// Create ads loader
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this.loader = new google.ima.AdsLoader(this.elements.displayContainer);
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// Listen and respond to ads loaded and error events
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this.loader.addEventListener(google.ima.AdsManagerLoadedEvent.Type.ADS_MANAGER_LOADED, event => this.onAdsManagerLoaded(event), false);
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this.loader.addEventListener(google.ima.AdErrorEvent.Type.AD_ERROR, error => this.onAdError(error), false);
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// Request video ads
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const request = new google.ima.AdsRequest();
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request.adTagUrl = this.tagUrl;
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// Specify the linear and nonlinear slot sizes. This helps the SDK
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// to select the correct creative if multiple are returned
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request.linearAdSlotWidth = container.offsetWidth;
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request.linearAdSlotHeight = container.offsetHeight;
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request.nonLinearAdSlotWidth = container.offsetWidth;
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request.nonLinearAdSlotHeight = container.offsetHeight;
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// We only overlay ads as we only support video.
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request.forceNonLinearFullSlot = false;
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this.loader.requestAds(request);
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} catch (e) {
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this.onAdError(e);
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}
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}
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/**
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* Update the ad countdown
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* @param {boolean} start
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*/
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pollCountdown(start = false) {
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if (!start) {
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clearInterval(this.countdownTimer);
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this.elements.container.removeAttribute('data-badge-text');
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return;
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}
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const update = () => {
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const time = utils.formatTime(Math.max(this.manager.getRemainingTime(), 0));
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const label = `${this.player.config.i18n.advertisement} - ${time}`;
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this.elements.container.setAttribute('data-badge-text', label);
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};
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this.countdownTimer = setInterval(update, 100);
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}
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/**
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* This method is called whenever the ads are ready inside the AdDisplayContainer
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* @param {Event} adsManagerLoadedEvent
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*/
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onAdsManagerLoaded(event) {
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// Get the ads manager
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const settings = new google.ima.AdsRenderingSettings();
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// Tell the SDK to save and restore content video state on our behalf
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settings.restoreCustomPlaybackStateOnAdBreakComplete = true;
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settings.enablePreloading = true;
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// The SDK is polling currentTime on the contentPlayback. And needs a duration
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// so it can determine when to start the mid- and post-roll
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this.manager = event.getAdsManager(this.player, settings);
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// Get the cue points for any mid-rolls by filtering out the pre- and post-roll
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this.cuePoints = this.manager.getCuePoints();
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// Add advertisement cue's within the time line if available
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this.cuePoints.forEach(cuePoint => {
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if (cuePoint !== 0 && cuePoint !== -1 && cuePoint < this.player.duration) {
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const seekElement = this.player.elements.progress;
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if (seekElement) {
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const cuePercentage = 100 / this.player.duration * cuePoint;
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const cue = utils.createElement('span', {
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class: this.player.config.classNames.cues,
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});
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cue.style.left = `${cuePercentage.toString()}%`;
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seekElement.appendChild(cue);
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}
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}
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});
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// Get skippable state
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// TODO: Skip button
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// this.manager.getAdSkippableState();
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// Set volume to match player
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this.manager.setVolume(this.player.volume);
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// Add listeners to the required events
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// Advertisement error events
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this.manager.addEventListener(google.ima.AdErrorEvent.Type.AD_ERROR, error => this.onAdError(error));
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// Advertisement regular events
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Object.keys(google.ima.AdEvent.Type).forEach(type => {
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this.manager.addEventListener(google.ima.AdEvent.Type[type], event => this.onAdEvent(event));
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});
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// Resolve our adsManager
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this.trigger('loaded');
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}
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/**
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* This is where all the event handling takes place. Retrieve the ad from the event. Some
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* events (e.g. ALL_ADS_COMPLETED) don't have the ad object associated
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* https://developers.google.com/interactive-media-ads/docs/sdks/html5/v3/apis#ima.AdEvent.Type
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* @param {Event} event
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*/
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onAdEvent(event) {
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const { container } = this.player.elements;
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// Retrieve the ad from the event. Some events (e.g. ALL_ADS_COMPLETED)
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// don't have ad object associated
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const ad = event.getAd();
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// Proxy event
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const dispatchEvent = type => {
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const event = `ads${type.replace(/_/g, '').toLowerCase()}`;
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utils.dispatchEvent.call(this.player, this.player.media, event);
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};
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switch (event.type) {
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case google.ima.AdEvent.Type.LOADED:
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// This is the first event sent for an ad - it is possible to determine whether the
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// ad is a video ad or an overlay
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this.trigger('loaded');
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// Bubble event
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dispatchEvent(event.type);
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// Start countdown
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this.pollCountdown(true);
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if (!ad.isLinear()) {
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// Position AdDisplayContainer correctly for overlay
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ad.width = container.offsetWidth;
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ad.height = container.offsetHeight;
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}
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// console.info('Ad type: ' + event.getAd().getAdPodInfo().getPodIndex());
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// console.info('Ad time: ' + event.getAd().getAdPodInfo().getTimeOffset());
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break;
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case google.ima.AdEvent.Type.ALL_ADS_COMPLETED:
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// All ads for the current videos are done. We can now request new advertisements
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// in case the video is re-played
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// Fire event
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dispatchEvent(event.type);
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// TODO: Example for what happens when a next video in a playlist would be loaded.
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// So here we load a new video when all ads are done.
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// Then we load new ads within a new adsManager. When the video
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// Is started - after - the ads are loaded, then we get ads.
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// You can also easily test cancelling and reloading by running
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// player.ads.cancel() and player.ads.play from the console I guess.
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// this.player.source = {
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// type: 'video',
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// title: 'View From A Blue Moon',
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// sources: [{
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// src:
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// 'https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-HD.mp4', type:
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// 'video/mp4', }], poster:
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// 'https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-HD.jpg', tracks:
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// [ { kind: 'captions', label: 'English', srclang: 'en', src:
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// 'https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-HD.en.vtt',
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// default: true, }, { kind: 'captions', label: 'French', srclang: 'fr', src:
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// 'https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-HD.fr.vtt', }, ],
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// };
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// TODO: So there is still this thing where a video should only be allowed to start
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// playing when the IMA SDK is ready or has failed
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this.loadAds();
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break;
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case google.ima.AdEvent.Type.CONTENT_PAUSE_REQUESTED:
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// This event indicates the ad has started - the video player can adjust the UI,
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// for example display a pause button and remaining time. Fired when content should
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// be paused. This usually happens right before an ad is about to cover the content
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dispatchEvent(event.type);
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this.pauseContent();
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break;
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case google.ima.AdEvent.Type.CONTENT_RESUME_REQUESTED:
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// This event indicates the ad has finished - the video player can perform
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// appropriate UI actions, such as removing the timer for remaining time detection.
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// Fired when content should be resumed. This usually happens when an ad finishes
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// or collapses
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dispatchEvent(event.type);
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this.pollCountdown();
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this.resumeContent();
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break;
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case google.ima.AdEvent.Type.STARTED:
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case google.ima.AdEvent.Type.MIDPOINT:
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case google.ima.AdEvent.Type.COMPLETE:
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case google.ima.AdEvent.Type.IMPRESSION:
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case google.ima.AdEvent.Type.CLICK:
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dispatchEvent(event.type);
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break;
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default:
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break;
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}
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}
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/**
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* Any ad error handling comes through here
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* @param {Event} event
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*/
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onAdError(event) {
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this.cancel();
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this.player.debug.warn('Ads error', event);
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}
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/**
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* Setup hooks for Plyr and window events. This ensures
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* the mid- and post-roll launch at the correct time. And
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* resize the advertisement when the player resizes
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*/
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listeners() {
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const { container } = this.player.elements;
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let time;
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// Add listeners to the required events
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this.player.on('ended', () => {
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this.loader.contentComplete();
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});
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this.player.on('seeking', () => {
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time = this.player.currentTime;
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return time;
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});
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this.player.on('seeked', () => {
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const seekedTime = this.player.currentTime;
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this.cuePoints.forEach((cuePoint, index) => {
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if (time < cuePoint && cuePoint < seekedTime) {
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this.manager.discardAdBreak();
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this.cuePoints.splice(index, 1);
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}
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});
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});
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// Listen to the resizing of the window. And resize ad accordingly
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// TODO: eventually implement ResizeObserver
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window.addEventListener('resize', () => {
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this.manager.resize(container.offsetWidth, container.offsetHeight, google.ima.ViewMode.NORMAL);
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});
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}
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/**
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* Initialize the adsManager and start playing advertisements
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*/
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play() {
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const { container } = this.player.elements;
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if (!this.managerPromise) {
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this.resumeContent();
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}
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// Play the requested advertisement whenever the adsManager is ready
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this.managerPromise
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.then(() => {
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// Initialize the container. Must be done via a user action on mobile devices
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this.elements.displayContainer.initialize();
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try {
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if (!this.initialized) {
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// Initialize the ads manager. Ad rules playlist will start at this time
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this.manager.init(container.offsetWidth, container.offsetHeight, google.ima.ViewMode.NORMAL);
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// Call play to start showing the ad. Single video and overlay ads will
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// start at this time; the call will be ignored for ad rules
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this.manager.start();
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}
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this.initialized = true;
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} catch (adError) {
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// An error may be thrown if there was a problem with the
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// VAST response
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this.onAdError(adError);
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}
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})
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.catch(() => {});
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}
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/**
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* Resume our video
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*/
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resumeContent() {
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// Hide the advertisement container
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this.elements.container.style.zIndex = '';
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// Ad is stopped
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this.playing = false;
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// Play our video
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if (this.player.currentTime < this.player.duration) {
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this.player.play();
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}
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}
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/**
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* Pause our video
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*/
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pauseContent() {
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// Show the advertisement container
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this.elements.container.style.zIndex = 3;
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// Ad is playing.
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this.playing = true;
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// Pause our video.
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this.player.pause();
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}
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/**
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* Destroy the adsManager so we can grab new ads after this. If we don't then we're not
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* allowed to call new ads based on google policies, as they interpret this as an accidental
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* video requests. https://developers.google.com/interactive-
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* media-ads/docs/sdks/android/faq#8
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*/
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cancel() {
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// Pause our video
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if (this.initialized) {
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this.resumeContent();
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}
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// Tell our instance that we're done for now
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this.trigger('error');
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// Re-create our adsManager
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this.loadAds();
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}
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/**
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* Re-create our adsManager
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*/
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loadAds() {
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// Tell our adsManager to go bye bye
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this.managerPromise
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.then(() => {
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// Destroy our adsManager
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if (this.manager) {
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this.manager.destroy();
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}
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// Re-set our adsManager promises
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this.managerPromise = new Promise(resolve => {
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this.on('loaded', resolve);
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this.player.debug.log(this.manager);
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});
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// Now request some new advertisements
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this.requestAds();
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})
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.catch(() => {});
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}
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/**
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* Handles callbacks after an ad event was invoked
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* @param {string} event - Event type
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*/
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trigger(event, ...args) {
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const handlers = this.events[event];
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if (utils.is.array(handlers)) {
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handlers.forEach(handler => {
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if (utils.is.function(handler)) {
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handler.apply(this, args);
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}
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});
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}
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}
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/**
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* Add event listeners
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* @param {string} event - Event type
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* @param {function} callback - Callback for when event occurs
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* @return {Ads}
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*/
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on(event, callback) {
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if (!utils.is.array(this.events[event])) {
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this.events[event] = [];
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}
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this.events[event].push(callback);
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return this;
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}
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/**
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* Setup a safety timer for when the ad network doesn't respond for whatever reason.
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* The advertisement has 12 seconds to get its things together. We stop this timer when the
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* advertisement is playing, or when a user action is required to start, then we clear the
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* timer on ad ready
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* @param {number} time
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* @param {string} from
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|
*/
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|
startSafetyTimer(time, from) {
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this.player.debug.log(`Safety timer invoked from: ${from}`);
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|
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this.safetyTimer = setTimeout(() => {
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|
this.cancel();
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|
this.clearSafetyTimer('startSafetyTimer()');
|
|
}, time);
|
|
}
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|
|
|
/**
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|
* Clear our safety timer(s)
|
|
* @param {string} from
|
|
*/
|
|
clearSafetyTimer(from) {
|
|
if (!utils.is.nullOrUndefined(this.safetyTimer)) {
|
|
this.player.debug.log(`Safety timer cleared from: ${from}`);
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|
|
|
clearTimeout(this.safetyTimer);
|
|
this.safetyTimer = null;
|
|
}
|
|
}
|
|
}
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|
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export default Ads;
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