Add support for instream video ads bidsWon tracking

modules/dfpAdServerVideo.js

@@ -8,6 +8,8 @@ import { deepAccess, isEmpty, logError, parseSizesInput, formatQS, parseUrl, bui
 import { config } from '../src/config.js';
 import { getHook, submodule } from '../src/hook.js';
 import { auctionManager } from '../src/auctionManager.js';
+import events from '../src/events.js';
+import CONSTANTS from '../src/constants.json';
 
 /**
  * @typedef {Object} DfpVideoParams
@@ -245,17 +247,20 @@ function getCustParams(bid, options) {
     allTargetingData = (allTargeting) ? allTargeting[adUnit.code] : {};
   }
 
-  const optCustParams = deepAccess(options, 'params.cust_params');
-  let customParams = Object.assign({},
+  const prebidTargetingSet = Object.assign({},
     // Why are we adding standard keys here ? Refer https://github.com/prebid/Prebid.js/issues/3664
     { hb_uuid: bid && bid.videoCacheKey },
     // hb_uuid will be deprecated and replaced by hb_cache_id
     { hb_cache_id: bid && bid.videoCacheKey },
     allTargetingData,
     adserverTargeting,
-    optCustParams,
   );
-  return encodeURIComponent(formatQS(customParams));
+  events.emit(CONSTANTS.EVENTS.SET_TARGETING, {[adUnit.code]: prebidTargetingSet});
+
+  // merge the prebid + publisher targeting sets
+  const publisherTargetingSet = deepAccess(options, 'params.cust_params');
+  const targetingSet = Object.assign({}, prebidTargetingSet, publisherTargetingSet);
+  return encodeURIComponent(formatQS(targetingSet));
 }
 
 registerVideoSupport('dfp', {

modules/instreamTracking.js

@@ -0,0 +1,114 @@
+import { config } from '../src/config.js';
+import { auctionManager } from '../src/auctionManager.js';
+import { INSTREAM } from '../src/video.js';
+import * as events from '../src/events.js';
+import * as utils from '../src/utils.js';
+import { BID_STATUS, EVENTS, TARGETING_KEYS } from '../src/constants.json';
+
+const {CACHE_ID, UUID} = TARGETING_KEYS;
+const {BID_WON, AUCTION_END} = EVENTS;
+const {RENDERED} = BID_STATUS;
+
+const INSTREAM_TRACKING_DEFAULT_CONFIG = {
+  enabled: false,
+  maxWindow: 1000 * 60, // the time in ms after which polling for instream delivery stops
+  pollingFreq: 500 // the frequency of polling
+};
+
+// Set instreamTracking default values
+config.setDefaults({
+  'instreamTracking': utils.deepClone(INSTREAM_TRACKING_DEFAULT_CONFIG)
+});
+
+const whitelistedResources = /video|fetch|xmlhttprequest|other/;
+
+/**
+ * Here the idea is
+ * find all network entries via performance.getEntriesByType()
+ * filter it by video cache key in the url
+ * and exclude the ad server urls so that we dont match twice
+ * eg:
+ * dfp ads call: https://securepubads.g.doubleclick.net/gampad/ads?...hb_cache_id%3D55e85cd3-6ea4-4469-b890-84241816b131%26...
+ * prebid cache url: https://prebid.adnxs.com/pbc/v1/cache?uuid=55e85cd3-6ea4-4469-b890-84241816b131
+ *
+ * if the entry exists, emit the BID_WON
+ *
+ * Note: this is a workaround till a better approach is engineered.
+ *
+ * @param {Array<AdUnit>} adUnits
+ * @param {Array<Bid>} bidsReceived
+ * @param {Array<BidRequest>} bidderRequests
+ *
+ * @return {boolean} returns TRUE if tracking started
+ */
+export function trackInstreamDeliveredImpressions({adUnits, bidsReceived, bidderRequests}) {
+  const instreamTrackingConfig = config.getConfig('instreamTracking') || {};
+  // check if instreamTracking is enabled and performance api is available
+  if (!instreamTrackingConfig.enabled || !window.performance || !window.performance.getEntriesByType) {
+    return false;
+  }
+
+  // filter for video bids
+  const instreamBids = bidsReceived.filter(bid => {
+    const bidderRequest = utils.getBidRequest(bid.requestId, bidderRequests);
+    return bidderRequest && utils.deepAccess(bidderRequest, 'mediaTypes.video.context') === INSTREAM && bid.videoCacheKey;
+  });
+  if (!instreamBids.length) {
+    return false;
+  }
+
+  // find unique instream ad units
+  const instreamAdUnitMap = {};
+  adUnits.forEach(adUnit => {
+    if (!instreamAdUnitMap[adUnit.code] && utils.deepAccess(adUnit, 'mediaTypes.video.context') === INSTREAM) {
+      instreamAdUnitMap[adUnit.code] = true;
+    }
+  });
+  const instreamAdUnitsCount = Object.keys(instreamAdUnitMap).length;
+
+  const start = Date.now();
+  const {maxWindow, pollingFreq, urlPattern} = instreamTrackingConfig;
+
+  let instreamWinningBidsCount = 0;
+  let lastRead = 0; // offset for performance.getEntriesByType
+
+  function poll() {
+    // get network entries using the last read offset
+    const entries = window.performance.getEntriesByType('resource').splice(lastRead);
+    for (const resource of entries) {
+      const url = resource.name;
+      // check if the resource is of whitelisted resource to avoid checking img or css or script urls
+      if (!whitelistedResources.test(resource.initiatorType)) {
+        continue;
+      }
+
+      instreamBids.forEach((bid) => {
+        // match the video cache key excluding ad server call
+        const matches = !(url.indexOf(CACHE_ID) !== -1 || url.indexOf(UUID) !== -1) && url.indexOf(bid.videoCacheKey) !== -1;
+        if (urlPattern && urlPattern instanceof RegExp && !urlPattern.test(url)) {
+          return;
+        }
+        if (matches && bid.status !== RENDERED) {
+          // video found
+          instreamWinningBidsCount++;
+          auctionManager.addWinningBid(bid);
+          events.emit(BID_WON, bid);
+        }
+      });
+    }
+    // update offset
+    lastRead += entries.length;
+
+    const timeElapsed = Date.now() - start;
+    if (timeElapsed < maxWindow && instreamWinningBidsCount < instreamAdUnitsCount) {
+      setTimeout(poll, pollingFreq);
+    }
+  }
+
+  // start polling for network entries
+  setTimeout(poll, pollingFreq);
+
+  return true;
+}
+
+events.on(AUCTION_END, trackInstreamDeliveredImpressions)

test/spec/modules/instreamTracking_spec.js

@@ -0,0 +1,221 @@
+import { assert } from 'chai';
+import { trackInstreamDeliveredImpressions } from 'modules/instreamTracking.js';
+import { config } from 'src/config.js';
+import * as events from 'src/events.js';
+import * as utils from 'src/utils.js';
+import * as sinon from 'sinon';
+import { INSTREAM, OUTSTREAM } from 'src/video.js';
+
+const BIDDER_CODE = 'sampleBidder';
+const VIDEO_CACHE_KEY = '4cf395af-8fee-4960-af0e-88d44e399f14';
+
+let sandbox;
+
+function enableInstreamTracking(regex) {
+  let configStub = sandbox.stub(config, 'getConfig');
+  configStub.withArgs('instreamTracking').returns(Object.assign(
+    {
+      enabled: true,
+      maxWindow: 10,
+      pollingFreq: 0
+    },
+    regex && {urlPattern: regex},
+  ));
+}
+
+function mockPerformanceApi({adServerCallSent, videoPresent}) {
+  let performanceStub = sandbox.stub(window.performance, 'getEntriesByType');
+  let entries = [{
+    name: 'https://domain.com/img.png',
+    initiatorType: 'img'
+  }, {
+    name: 'https://domain.com/script.js',
+    initiatorType: 'script'
+  }, {
+    name: 'https://domain.com/xhr',
+    initiatorType: 'xmlhttprequest'
+  }, {
+    name: 'https://domain.com/fetch',
+    initiatorType: 'fetch'
+  }];
+
+  if (adServerCallSent || videoPresent) {
+    entries.push({
+      name: 'https://adserver.com/ads?custom_params=hb_uuid%3D' + VIDEO_CACHE_KEY + '%26pos%3D' + VIDEO_CACHE_KEY,
+      initiatorType: 'xmlhttprequest'
+    });
+  }
+
+  if (videoPresent) {
+    entries.push({
+      name: 'https://prebid-vast-cache.com/cache?key=' + VIDEO_CACHE_KEY,
+      initiatorType: 'xmlhttprequest'
+    });
+  }
+
+  performanceStub.withArgs('resource').returns(entries);
+}
+
+function mockBidResponse(adUnit, requestId) {
+  const bid = {
+    'adUnitCod': adUnit.code,
+    'bidderCode': adUnit.bids[0].bidder,
+    'width': adUnit.sizes[0][0],
+    'height': adUnit.sizes[0][1],
+    'statusMessage': 'Bid available',
+    'adId': 'id',
+    'requestId': requestId,
+    'source': 'client',
+    'no_bid': false,
+    'cpm': '1.1495',
+    'ttl': 180,
+    'creativeId': 'id',
+    'netRevenue': true,
+    'currency': 'USD',
+  }
+  if (adUnit.mediaTypes.video) {
+    bid.videoCacheKey = VIDEO_CACHE_KEY;
+  }
+  return bid
+}
+
+function mockBidRequest(adUnit, bidResponse) {
+  return {
+    'bidderCode': bidResponse.bidderCode,
+    'auctionId': '20882439e3238c',
+    'bidderRequestId': 'bidderRequestId',
+    'bids': [
+      {
+        'adUnitCode': adUnit.code,
+        'mediaTypes': adUnit.mediaTypes,
+        'bidder': bidResponse.bidderCode,
+        'bidId': bidResponse.requestId,
+        'sizes': adUnit.sizes,
+        'params': adUnit.bids[0].params,
+        'bidderRequestId': 'bidderRequestId',
+        'auctionId': '20882439e3238c',
+      }
+    ],
+    'auctionStart': 1505250713622,
+    'timeout': 3000
+  };
+}
+
+function getMockInput(mediaType) {
+  const bannerAdUnit = {
+    code: 'banner',
+    mediaTypes: {banner: {sizes: [[300, 250]]}},
+    sizes: [[300, 250]],
+    bids: [{bidder: BIDDER_CODE, params: {placementId: 'id'}}]
+  };
+  const outStreamAdUnit = {
+    code: 'video-' + OUTSTREAM,
+    mediaTypes: {video: {playerSize: [640, 480], context: OUTSTREAM}},
+    sizes: [[640, 480]],
+    bids: [{bidder: BIDDER_CODE, params: {placementId: 'id'}}]
+  };
+  const inStreamAdUnit = {
+    code: 'video-' + INSTREAM,
+    mediaTypes: {video: {playerSize: [640, 480], context: INSTREAM}},
+    sizes: [[640, 480]],
+    bids: [{bidder: BIDDER_CODE, params: {placementId: 'id'}}]
+  };
+
+  let adUnit;
+  switch (mediaType) {
+    default:
+    case 'banner':
+      adUnit = bannerAdUnit;
+      break;
+    case OUTSTREAM:
+      adUnit = outStreamAdUnit;
+      break;
+    case INSTREAM:
+      adUnit = inStreamAdUnit;
+      break;
+  }
+
+  const bidResponse = mockBidResponse(adUnit, utils.getUniqueIdentifierStr());
+  const bidderRequest = mockBidRequest(adUnit, bidResponse);
+  return {
+    adUnits: [adUnit],
+    bidsReceived: [bidResponse],
+    bidderRequests: [bidderRequest],
+  };
+}
+
+describe('Instream Tracking', function () {
+  beforeEach(function () {
+    sandbox = sinon.sandbox.create();
+  });
+
+  afterEach(function () {
+    sandbox.restore();
+  });
+
+  describe('gaurd checks', function () {
+    it('skip if tracking not enable', function () {
+      sandbox.stub(config, 'getConfig').withArgs('instreamTracking').returns(undefined);
+      assert.isNotOk(trackInstreamDeliveredImpressions({
+        adUnits: [],
+        bidsReceived: [],
+        bidderRequests: []
+      }), 'should not start tracking when tracking is disabled');
+    });
+
+    it('run only if instream bids are present', function () {
+      enableInstreamTracking();
+      assert.isNotOk(trackInstreamDeliveredImpressions({adUnits: [], bidsReceived: [], bidderRequests: []}));
+    });
+
+    it('checks for instream bids', function (done) {
+      enableInstreamTracking();
+      assert.isNotOk(trackInstreamDeliveredImpressions(getMockInput('banner')), 'should not start tracking when banner bids are present')
+      assert.isNotOk(trackInstreamDeliveredImpressions(getMockInput(OUTSTREAM)), 'should not start tracking when outstream bids are present')
+      mockPerformanceApi({});
+      assert.isOk(trackInstreamDeliveredImpressions(getMockInput(INSTREAM)), 'should start tracking when instream bids are present')
+      setTimeout(done, 10);
+    });
+  });
+
+  describe('instream bids check', function () {
+    let spyEventsOn;
+
+    beforeEach(function () {
+      spyEventsOn = sandbox.spy(events, 'emit');
+    });
+
+    it('BID WON event is not emitted when no video cache key entries are present', function (done) {
+      enableInstreamTracking();
+      trackInstreamDeliveredImpressions(getMockInput(INSTREAM));
+      mockPerformanceApi({});
+      setTimeout(function () {
+        assert.isNotOk(spyEventsOn.calledWith('bidWon'))
+        done()
+      }, 10);
+    });
+
+    it('BID WON event is not emitted when ad server call is sent', function (done) {
+      enableInstreamTracking();
+      mockPerformanceApi({adServerCallSent: true});
+      setTimeout(function () {
+        assert.isNotOk(spyEventsOn.calledWith('bidWon'))
+        done()
+      }, 10);
+    });
+
+    it('BID WON event is emitted when video cache key is present', function (done) {
+      enableInstreamTracking(/cache/);
+      const bidWonSpy = sandbox.spy();
+      events.on('bidWon', bidWonSpy);
+      mockPerformanceApi({adServerCallSent: true, videoPresent: true});
+
+      trackInstreamDeliveredImpressions(getMockInput(INSTREAM));
+      setTimeout(function () {
+        assert.isOk(spyEventsOn.calledWith('bidWon'))
+        assert(bidWonSpy.args[0][0].videoCacheKey, VIDEO_CACHE_KEY, 'Video cache key in bid won should be equal to video cache call');
+        done()
+      }, 10);
+    });
+  });
+});