Add teads bidder adapter (prebid#3135)

* Add teads bidder adapter

* Remove bidder code & tests arrow functions

modules/teadsBidAdapter.js

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+import {registerBidder} from 'src/adapters/bidderFactory';
+const utils = require('src/utils');
+const BIDDER_CODE = 'teads';
+const ENDPOINT_URL = '//a.teads.tv/hb/bid-request';
+const gdprStatus = {
+  GDPR_APPLIES_PUBLISHER: 12,
+  GDPR_APPLIES_GLOBAL: 11,
+  GDPR_DOESNT_APPLY: 0,
+  CMP_NOT_FOUND_OR_ERROR: 22
+}
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: ['video', 'banner'],
+  /**
+   * Determines whether or not the given bid request is valid.
+   *
+   * @param {BidRequest} bid The bid params to validate.
+   * @return boolean True if this is a valid bid, and false otherwise.
+   */
+  isBidRequestValid: function(bid) {
+    let isValid = false;
+    if (typeof bid.params !== 'undefined') {
+      let isValidPlacementId = _validateId(utils.getValue(bid.params, 'placementId'));
+      let isValidPageId = _validateId(utils.getValue(bid.params, 'pageId'));
+      isValid = isValidPlacementId && isValidPageId;
+    }
+
+    if (!isValid) {
+      utils.logError('Teads placementId and pageId parameters are required. Bid aborted.');
+    }
+    return isValid;
+  },
+  /**
+   * Make a server request from the list of BidRequests.
+   *
+   * @param {validBidRequests[]} an array of bids
+   * @return ServerRequest Info describing the request to the server.
+   */
+  buildRequests: function(validBidRequests, bidderRequest) {
+    const bids = validBidRequests.map(buildRequestObject);
+    const payload = {
+      referrer: utils.getTopWindowUrl(),
+      data: bids,
+      deviceWidth: screen.width
+    };
+
+    let gdpr = bidderRequest.gdprConsent;
+    if (bidderRequest && gdpr) {
+      let isCmp = (typeof gdpr.gdprApplies === 'boolean')
+      let isConsentString = (typeof gdpr.consentString === 'string')
+      let status = isCmp ? findGdprStatus(gdpr.gdprApplies, gdpr.vendorData) : gdprStatus.CMP_NOT_FOUND_OR_ERROR
+      payload.gdpr_iab = {
+        consent: isConsentString ? gdpr.consentString : '',
+        status: status
+      };
+    }
+
+    const payloadString = JSON.stringify(payload);
+    return {
+      method: 'POST',
+      url: ENDPOINT_URL,
+      data: payloadString,
+    };
+  },
+  /**
+   * Unpack the response from the server into a list of bids.
+   *
+   * @param {*} serverResponse A successful response from the server.
+   * @return {Bid[]} An array of bids which were nested inside the server.
+   */
+  interpretResponse: function(serverResponse, bidderRequest) {
+    const bidResponses = [];
+    serverResponse = serverResponse.body;
+
+    if (serverResponse.responses) {
+      serverResponse.responses.forEach(function (bid) {
+        const bidResponse = {
+          cpm: bid.cpm,
+          width: bid.width,
+          height: bid.height,
+          currency: bid.currency,
+          netRevenue: true,
+          ttl: bid.ttl,
+          ad: bid.ad,
+          requestId: bid.bidId,
+          creativeId: bid.creativeId
+        };
+        bidResponses.push(bidResponse);
+      });
+    }
+    return bidResponses;
+  },
+
+  getUserSyncs: function(syncOptions, responses, gdprApplies) {
+    if (syncOptions.iframeEnabled) {
+      return [{
+        type: 'iframe',
+        url: '//sync.teads.tv/iframe'
+      }];
+    }
+  }
+};
+
+function findGdprStatus(gdprApplies, gdprData) {
+  let status = gdprStatus.GDPR_APPLIES_PUBLISHER;
+
+  if (gdprApplies) {
+    if (gdprData.hasGlobalScope || gdprData.hasGlobalConsent) status = gdprStatus.GDPR_APPLIES_GLOBAL
+  } else status = gdprStatus.GDPR_DOESNT_APPLY
+  return status;
+}
+
+function buildRequestObject(bid) {
+  const reqObj = {};
+  let placementId = utils.getValue(bid.params, 'placementId');
+  let pageId = utils.getValue(bid.params, 'pageId');
+
+  reqObj.sizes = utils.parseSizesInput(bid.sizes);
+  reqObj.bidId = utils.getBidIdParameter('bidId', bid);
+  reqObj.bidderRequestId = utils.getBidIdParameter('bidderRequestId', bid);
+  reqObj.placementId = parseInt(placementId, 10);
+  reqObj.pageId = parseInt(pageId, 10);
+  reqObj.adUnitCode = utils.getBidIdParameter('adUnitCode', bid);
+  reqObj.auctionId = utils.getBidIdParameter('auctionId', bid);
+  reqObj.transactionId = utils.getBidIdParameter('transactionId', bid);
+  return reqObj;
+}
+
+function _validateId(id) {
+  return (parseInt(id) > 0);
+}
+
+registerBidder(spec);

modules/teadsBidAdapter.md

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+# Overview
+
+**Module Name**: Teads Bidder Adapter  
+**Module Type**: Bidder Adapter  
+**Maintainer**: innov-ssp@teads.tv 
+
+# Description
+
+Use `teads` as bidder.
+
+`placementId` & `pageId` are required and must be integers.
+
+## AdUnits configuration example
+```
+    var adUnits = [{
+      code: 'your-slot_1-div', //use exactly the same code as your slot div id.
+      sizes: [[300, 250]],
+      bids: [{
+          bidder: 'teads',
+          params: { 
+              placementId: 12345,
+              pageId: 1234
+          }
+      }]
+    },{
+      code: 'your-slot_2-div', //use exactly the same code as your slot div id.
+      sizes: [[600, 800]],
+      bids: [{
+          bidder: 'teads',
+          params: { 
+              placementId: 12345,
+              pageId: 1234
+          }
+      }]
+    }];
+```
+
+## UserSync example
+
+```
+pbjs.setConfig({
+  userSync: {
+    iframeEnabled: true,
+    syncEnabled: true,
+    syncDelay: 1
+  }
+});
+```