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Yieldmo Synthetic Inventory Module: ad prefetch from the yieldmo ad server #7803

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Yieldmo Synthetic Inventory Module: ad prefetch from the yieldmo ad server #7803

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Yieldmo Synthetic Inventory Module: ad prefetch from the yieldmo ad s…
ym-abaranov Nov 12, 2021
8bec1fb
https://github.com/prebid/Prebid.js/pull/7803 fixes
ym-abaranov Jan 12, 2022
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319 changes: 301 additions & 18 deletions modules/yieldmoSyntheticInventoryModule.js
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Original file line number Diff line number Diff line change
@@ -1,26 +1,35 @@
import { config } from '../src/config.js';
import { isGptPubadsDefined } from '../src/utils.js';
import { isGptPubadsDefined, isFn } from '../src/utils.js';
import strIncludes from 'core-js-pure/features/string/includes.js';

export const MODULE_NAME = 'Yieldmo Synthetic Inventory Module';
export const AD_SERVER_ENDPOINT = 'https://ads.yieldmo.com/v002/t_ads/ads';
export const AD_REQUEST_TYPE = 'GET';
const USPAPI_VERSION = 1;

let cmpVersion = 0;
let cmpResolved = false;

export function init(config) {
checkSandbox(window);
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There is a similar function in utils which checks if window is inside iframe, inIframe

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Good catch, we will change that

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We've kept checkSandbox because inIframe checks iframe placement. We're ok with iframe but not sandboxed one

validateConfig(config);

if (!isGptPubadsDefined()) {
window.googletag = window.googletag || {};
window.googletag.cmd = window.googletag.cmd || [];
}

const googletag = window.googletag;
const containerName = 'ym_sim_container_' + config.placementId;

googletag.cmd.push(() => {
if (window.document.body) {
googletagCmd(config, containerName, googletag);
} else {
window.document.addEventListener('DOMContentLoaded', () => googletagCmd(config, containerName, googletag));
const consentData = () => {
const consentDataObj = {};
return (api, result) => {
consentDataObj[api] = result;
if ('cmp' in consentDataObj && 'usp' in consentDataObj) {
if (!isGptPubadsDefined()) {
window.top.googletag = window.top.googletag || {};
window.top.googletag.cmd = window.top.googletag.cmd || [];
}
getAd(`${AD_SERVER_ENDPOINT}?${serialize(collectData(config.placementId, consentDataObj))}`, config);
}
}
});
};
const consentDataHandler = consentData();
lookupIabConsent((a) => consentDataHandler('cmp', a), (e) => consentDataHandler('cmp', false));
lookupUspConsent((a) => consentDataHandler('usp', a), (e) => consentDataHandler('usp', false));
}

export function validateConfig(config) {
Expand All @@ -32,15 +41,289 @@ export function validateConfig(config) {
}
}

function googletagCmd(config, containerName, googletag) {
const gamContainer = window.document.createElement('div');
function googletagCmd(config, googletag) {
const gamContainer = window.top.document.createElement('div');
const containerName = 'ym_sim_container_' + config.placementId;
gamContainer.id = containerName;
window.document.body.appendChild(gamContainer);
window.top.document.body.appendChild(gamContainer);
googletag.defineSlot(config.adUnitPath, [1, 1], containerName)
.addService(googletag.pubads())
.setTargeting('ym_sim_p_id', config.placementId);
googletag.enableServices();
googletag.display(containerName);
}

function collectData(placementId, consentDataObj) {
const timeStamp = new Date().getTime();
const connection = window.navigator.connection || {};
const description = Array.prototype.slice.call(document.getElementsByTagName('meta'))
.filter((meta) => meta.getAttribute('name') === 'description')[0];
const pageDimensions = {
density: window.top.devicePixelRatio || 0,
height: window.top.screen.height || window.top.screen.availHeight || window.top.outerHeight || window.top.innerHeight || 481,
width: window.top.screen.width || window.top.screen.availWidth || window.top.outerWidth || window.top.innerWidth || 321,
};

return {
bust: timeStamp,
dnt: window.top.doNotTrack === '1' || window.top.navigator.doNotTrack === '1' || false,
pr: document.referrer || '',
_s: 1,
e: 4,
page_url: window.top.location.href,
p: placementId,
description: description ? description.content.substring(0, 1000) : '',
title: document.title,
scrd: pageDimensions.density,
h: pageDimensions.height,
w: pageDimensions.width,
pft: timeStamp,
ct: timeStamp,
connect: connection.effectiveType,
bwe: connection.downlink ? connection.downlink + 'Mb/sec' : '',
rtt: connection.rtt,
sd: connection.saveData,
us_privacy: (consentDataObj.usp && consentDataObj.usp.usPrivacy) || '',
cmp: (consentDataObj.cmp && consentDataObj.cmp.tcString) || ''
};
}

function serialize(dataObj) {
const str = [];
for (let p in dataObj) {
if (dataObj.hasOwnProperty(p) && (dataObj[p] || dataObj[p] === false)) {
str.push(encodeURIComponent(p) + '=' + encodeURIComponent(dataObj[p]));
}
}
return str.join('&');
}

function processResponse(response) {
let responseBody;
try {
responseBody = JSON.parse(response.responseText);
} catch (err) {
throw new Error(`${MODULE_NAME}: response body is not valid JSON`);
}
if (response.status !== 200 || !responseBody.data || !responseBody.data.length || !responseBody.data[0].ads || !responseBody.data[0].ads.length) {
throw new Error(`${MODULE_NAME}: NOAD`);
}
return responseBody;
}

function getAd(url, config) {
const req = new XMLHttpRequest();
req.open(AD_REQUEST_TYPE, url, true);
req.onload = (e) => {
const response = processResponse(e.target);
window.top.__ymAds = response;
const googletag = window.top.googletag;
googletag.cmd.push(() => {
if (window.top.document.body) {
googletagCmd(config, googletag);
} else {
window.top.document.addEventListener('DOMContentLoaded', () => googletagCmd(config, googletag));
}
});
};
req.send(null);
}

function checkSandbox(w) {
try {
return !w.top.document && w.top !== w && !w.frameElement;
} catch (e) {
throw new Error(`${MODULE_NAME}: module was placed in the sandbox iframe`);
}
}

function lookupIabConsent(cmpSuccess, cmpError) {
function findCMP() {
let f = window;
let cmpFrame;
let cmpFunction;

while (!cmpFrame) {
try {
if (isFn(f.__tcfapi)) {
cmpVersion = 2;
cmpFunction = f.__tcfapi;
cmpFrame = f;
continue;
}
} catch (e) { }

try {
if (f.frames['__tcfapiLocator']) {
cmpVersion = 2;
cmpFrame = f;
continue;
}
} catch (e) { }

if (f === window.top) break;
f = f.parent;
}
return {
cmpFrame,
cmpFunction
};
}

function cmpResponseCallback(tcfData, success) {
if (success) {
setTimeout(() => {
if (!cmpResolved) {
cmpSuccess(tcfData);
}
}, 3000);
if (tcfData.gdprApplies === false || tcfData.eventStatus === 'tcloaded' || tcfData.eventStatus === 'useractioncomplete') {
cmpSuccess(tcfData);
cmpResolved = true;
}
} else {
cmpError('CMP unable to register callback function. Please check CMP setup.');
}
}

let { cmpFrame, cmpFunction } = findCMP();

if (!cmpFrame) {
return cmpError('CMP not found.');
}

if (isFn(cmpFunction)) {
cmpFunction('addEventListener', cmpVersion, cmpResponseCallback);
} else {
callCmpWhileInIframe('addEventListener', cmpFrame, cmpResponseCallback);
}

function callCmpWhileInIframe(commandName, cmpFrame, moduleCallback) {
let apiName = '__tcfapi';
let callName = `${apiName}Call`;
let callId = Math.random() + '';
let msg = {
[callName]: {
command: commandName,
version: cmpVersion,
parameter: undefined,
callId: callId
}
};

cmpFrame.postMessage(msg, '*');

window.addEventListener('message', readPostMessageResponse, false);

function readPostMessageResponse(event) {
let cmpDataPkgName = `${apiName}Return`;
let json = (typeof event.data === 'string' && strIncludes(event.data, cmpDataPkgName)) ? JSON.parse(event.data) : event.data;
if (json[cmpDataPkgName] && json[cmpDataPkgName].callId) {
let payload = json[cmpDataPkgName];

if (payload.callId === callId) {
moduleCallback(payload.returnValue, payload.success);
}
}
}
}
}

function lookupUspConsent(uspSuccess, uspError) {
function findUsp() {
let f = window;
let uspapiFrame;
let uspapiFunction;

while (!uspapiFrame) {
try {
if (isFn(f.__uspapi)) {
uspapiFunction = f.__uspapi;
uspapiFrame = f;
continue;
}
} catch (e) {}

try {
if (f.frames['__uspapiLocator']) {
uspapiFrame = f;
continue;
}
} catch (e) {}
if (f === window.top) break;
f = f.parent;
}
return {
uspapiFrame,
uspapiFunction,
};
}

function handleUspApiResponseCallbacks() {
const uspResponse = {};

function afterEach() {
if (uspResponse.usPrivacy) {
uspSuccess(uspResponse);
} else {
uspError('Unable to get USP consent string.');
}
}

return {
consentDataCallback: (consentResponse, success) => {
if (success && consentResponse.uspString) {
uspResponse.usPrivacy = consentResponse.uspString;
}
afterEach();
},
};
}

let callbackHandler = handleUspApiResponseCallbacks();
let { uspapiFrame, uspapiFunction } = findUsp();

if (!uspapiFrame) {
return uspError('USP CMP not found.');
}

if (isFn(uspapiFunction)) {
uspapiFunction(
'getUSPData',
USPAPI_VERSION,
callbackHandler.consentDataCallback
);
} else {
callUspApiWhileInIframe(
'getUSPData',
uspapiFrame,
callbackHandler.consentDataCallback
);
}

function callUspApiWhileInIframe(commandName, uspapiFrame, moduleCallback) {
let callId = Math.random() + '';
let msg = {
__uspapiCall: {
command: commandName,
version: USPAPI_VERSION,
callId: callId,
},
};

uspapiFrame.postMessage(msg, '*');

window.addEventListener('message', readPostMessageResponse, false);

function readPostMessageResponse(event) {
const res = event && event.data && event.data.__uspapiReturn;
if (res && res.callId) {
if (res.callId === callId) {
moduleCallback(res.returnValue, res.success);
}
}
}
}
}

config.getConfig('yieldmo_synthetic_inventory', config => init(config.yieldmo_synthetic_inventory));
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