Retailspot Bid Adapter : initial release (#9824)

* add bidder adapter

* fix env url

* add unit tests

* minor: fix bids access in request

* add details in bid response

* fix unit tests

* fix adId undefined case

* reset package lock json

* handle vastXml as base64 string

modules/retailspotBidAdapter .md

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+# Overview
+
+Module Name: RetailSpot Bidder Adapter
+Module Type: Bidder Adapter
+Maintainer: guillaume@retail-spot.io
+
+# Description
+
+Module that connects to RetailSpot demand sources.
+Banner and Video ad formats are supported.
+
+# Test Parameters
+```
+  var adUnits = {
+    "code": "test-div",
+    "mediaTypes": {
+      "banner": {
+        "sizes": ["300x250"]
+      },
+      "video": {
+        context: "instream",
+        playerSize: [[640, 480]]
+      }
+    },
+    bids: [{
+      bidder: "retailspot",
+      params: {
+        placement: "test-12345"
+      }
+    }]
+  };
+```

modules/retailspotBidAdapter.js

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+import {buildUrl, deepAccess, parseSizesInput} from '../src/utils.js';
+import {registerBidder} from '../src/adapters/bidderFactory.js';
+import {BANNER, VIDEO} from '../src/mediaTypes.js';
+
+const BIDDER_CODE = 'retailspot';
+const DEFAULT_SUBDOMAIN = 'ssp';
+const PREPROD_SUBDOMAIN = 'ssp-preprod';
+const HOST = 'retail-spot.io';
+const ENDPOINT = '/prebid';
+const DEV_URL = 'http://localhost:8090/prebid';
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER, VIDEO],
+  aliases: ['rs'], // short code
+  /**
+   * 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) {
+    const sizes = getSize(getSizeArray(bid));
+    const sizeValid = sizes.width > 0 && sizes.height > 0;
+
+    return deepAccess(bid, 'params.placement') && sizeValid;
+  },
+  /**
+   * Make a server request from the list of BidRequests.
+   *
+   * @param {bidRequests} - bidRequests.bids[] is an array of AdUnits and bids
+   * @return ServerRequest Info describing the request to the server.
+   */
+  buildRequests: function (bidRequests, bidderRequest) {
+    const payload = bidderRequest;
+    payload.rs_pbjs_version = '$prebid.version$';
+
+    const data = JSON.stringify(payload);
+    const options = {
+      withCredentials: true
+    };
+
+    const envParam = bidRequests[0].params.env;
+    var subDomain = DEFAULT_SUBDOMAIN;
+    if (envParam === 'preprod') {
+      subDomain = PREPROD_SUBDOMAIN;
+    }
+
+    let url = buildUrl({
+      protocol: 'https',
+      host: `${subDomain}.${HOST}`,
+      pathname: ENDPOINT
+    });
+
+    if (envParam === 'dev') {
+      url = DEV_URL;
+    }
+
+    return {
+      method: 'POST',
+      url,
+      data,
+      options
+    };
+  },
+  /**
+   * 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, request) {
+    const bidResponses = [];
+    var bidRequests = {};
+
+    try {
+      bidRequests = JSON.parse(request.data).bids;
+    } catch (err) {
+      // json error initial request can't be read
+    }
+
+    // For this adapter, serverResponse is a list
+    serverResponse.body.forEach(response => {
+      const bid = createBid(response, bidRequests);
+      if (bid) {
+        bidResponses.push(bid);
+      }
+    });
+
+    return bidResponses;
+  }
+}
+
+function getSizeArray(bid) {
+  let inputSize = bid.sizes || [];
+
+  if (bid.mediaTypes && bid.mediaTypes.banner) {
+    inputSize = bid.mediaTypes.banner.sizes || [];
+  }
+
+  // handle size in bid.params in formats: [w, h] and [[w,h]].
+  if (bid.params && Array.isArray(bid.params.size)) {
+    inputSize = bid.params.size;
+    if (!Array.isArray(inputSize[0])) {
+      inputSize = [inputSize]
+    }
+  }
+
+  return parseSizesInput(inputSize);
+}
+
+/* Get parsed size from request size */
+function getSize(sizesArray) {
+  const parsed = {};
+  // the main requested size is the first one
+  const size = sizesArray[0];
+
+  if (typeof size !== 'string') {
+    return parsed;
+  }
+
+  const parsedSize = size.toUpperCase().split('X');
+  const width = parseInt(parsedSize[0], 10);
+  if (width) {
+    parsed.width = width;
+  }
+
+  const height = parseInt(parsedSize[1], 10);
+  if (height) {
+    parsed.height = height;
+  }
+
+  return parsed;
+}
+
+/* Create bid from response */
+function createBid(response, bidRequests) {
+  if (!response || !response.mediaType ||
+    (response.mediaType === 'video' && !response.vastXml) ||
+    (response.mediaType === 'banner' && !response.ad)) {
+    return;
+  }
+
+  const request = bidRequests && bidRequests.length && bidRequests.find(itm => response.requestId === itm.bidId);
+  // In case we don't retreive the size from the adserver, use the given one.
+  if (request) {
+    if (!response.width || response.width === '0') {
+      response.width = request.width;
+    }
+
+    if (!response.height || response.height === '0') {
+      response.height = request.height;
+    }
+  }
+
+  const bid = {
+    bidderCode: BIDDER_CODE,
+    width: response.width,
+    height: response.height,
+    requestId: response.requestId,
+    ttl: response.ttl || 3600,
+    creativeId: response.creativeId,
+    cpm: response.cpm,
+    netRevenue: response.netRevenue,
+    currency: response.currency,
+    meta: response.meta || { advertiserDomains: ['retail-spot.io'] },
+    mediaType: response.mediaType
+  };
+
+  // retreive video response if present
+  if (response.mediaType === 'video') {
+    bid.vastXml = window.atob(response.vastXml);
+  } else {
+    bid.ad = response.ad;
+  }
+  if (response.adId) {
+    bid.adId = response.adId;
+  }
+  if (response.dealId) {
+    bid.dealId = response.dealId;
+  }
+
+  return bid;
+}
+
+registerBidder(spec);