PulsePoint Lite adapter changes (prebid#1338)

* ET-1691: Pulsepoint Analytics adapter for Prebid. (#1)

* ET-1691: Adding pulsepoint analytics and tests for pulsepoint adapter

* ET-1691: Adding pulsepoint analytics and tests for pulsepoint adapter

* ET-1691: cleanup

* ET-1691: minor

* ET-1691: revert package.json change

* Adding bidRequest to bidFactory.createBid method as per prebid#509

* ET-1765: Adding support for additional params in PulsePoint adapter (prebid#2)

* ET-1850: Fixing prebid#866

* Minor fix

* Adding multi imp ORTB support

* replacing existing lite adapter code

* interim commit

* pulseLite - native tests

* pulseLite - native tests

* registering new adapter name via alias

modules/pulsepointLiteBidAdapter.js

@@ -5,45 +5,203 @@ import {ajax} from 'src/ajax';
 import {STATUS} from 'src/constants';
 import adaptermanager from 'src/adaptermanager';
 
+/**
+ * PulsePoint "Lite" Adapter.  This adapter implementation is lighter than the
+ * alternative/original PulsePointAdapter because it has no external
+ * dependencies and relies on a single OpenRTB request to the PulsePoint
+ * bidder instead of separate requests per slot.
+ */
 function PulsePointLiteAdapter() {
-  const bidUrl = window.location.protocol + '//bid.contextweb.com/header/tag?';
+  const bidUrl = window.location.protocol + '//bid.contextweb.com/header/ortb';
   const ajaxOptions = {
-    method: 'GET',
+    method: 'POST',
     withCredentials: true,
     contentType: 'text/plain'
   };
+  const NATIVE_DEFAULTS = {
+    TITLE_LEN: 100,
+    DESCR_LEN: 200,
+    SPONSORED_BY_LEN: 50,
+    IMG_MIN: 150,
+    ICON_MIN: 50,
+  };
+
+  /**
+   * Makes the call to PulsePoint endpoint and registers bids.
+   */
+  function _callBids(bidRequest) {
+    try {
+      // construct the openrtb bid request from slots
+      const request = {
+        imp: bidRequest.bids.map(slot => impression(slot)),
+        site: site(bidRequest),
+        device: device(),
+      };
+      ajax(bidUrl, (rawResponse) => {
+        bidResponseAvailable(bidRequest, rawResponse);
+      }, JSON.stringify(request), ajaxOptions);
+    } catch (e) {
+      // register passback on any exceptions while attempting to fetch response.
+      logError('pulsepoint.requestBid', 'ERROR', e);
+      bidResponseAvailable(bidRequest);
+    }
+  }
 
-  function _callBids(bidderRequest) {
-    bidderRequest.bids.forEach(bidRequest => {
-      try {
-        var params = Object.assign({}, environment(), bidRequest.params);
-        var url = bidUrl + Object.keys(params).map(k => k + '=' + encodeURIComponent(params[k])).join('&');
-        ajax(url, (bidResponse) => {
-          bidResponseAvailable(bidRequest, bidResponse);
-        }, null, ajaxOptions);
-      } catch (e) {
-        // register passback on any exceptions while attempting to fetch response.
-        logError('pulsepoint.requestBid', 'ERROR', e);
-        bidResponseAvailable(bidRequest);
+  /**
+   * Callback for bids, after the call to PulsePoint completes.
+   */
+  function bidResponseAvailable(bidRequest, rawResponse) {
+    const idToSlotMap = {};
+    const idToBidMap = {};
+    // extract the request bids and the response bids, keyed by impr-id
+    bidRequest.bids.forEach((slot) => {
+      idToSlotMap[slot.bidId] = slot;
+    });
+    const bidResponse = parse(rawResponse);
+    if (bidResponse) {
+      bidResponse.seatbid.forEach(seatBid => seatBid.bid.forEach((bid) => {
+        idToBidMap[bid.impid] = bid;
+      }));
+    }
+    // register the responses
+    Object.keys(idToSlotMap).forEach((id) => {
+      if (idToBidMap[id]) {
+        const size = adSize(idToSlotMap[id]);
+        const bid = createBid(STATUS.GOOD, bidRequest);
+        bid.bidderCode = bidRequest.bidderCode;
+        bid.cpm = idToBidMap[id].price;
+        bid.adId = id;
+        if(isNative(idToSlotMap[id])) {
+          bid.native = nativeResponse(idToSlotMap[id], idToBidMap[id]);
+          bid.mediaType = 'native';
+        } else {
+          bid.ad = idToBidMap[id].adm;
+          bid.width = size[0];
+          bid.height = size[1];
+        }
+        addBidResponse(idToSlotMap[id].placementCode, bid);
+      } else {
+        const passback = createBid(STATUS.NO_BID, bidRequest);
+        passback.bidderCode = bidRequest.bidderCode;
+        passback.adId = id;
+        addBidResponse(idToSlotMap[id].placementCode, passback);
       }
     });
   }
 
-  function environment() {
+  /**
+   * Produces an OpenRTBImpression from a slot config.
+   */
+  function impression(slot) {
+    return {
+      id: slot.bidId,
+      banner: banner(slot),
+      native: native(slot),
+      tagid: slot.params.ct.toString(),
+    };
+  }
+
+  /**
+   * Produces an OpenRTB Banner object for the slot given.
+   */
+  function banner(slot) {
+    const size = adSize(slot);
+    return slot.nativeParams ? null : {
+      w: size[0],
+      h: size[1],
+    };
+  }
+
+  /**
+   * Produces an OpenRTB Native object for the slot given.
+   */
+  function native(slot) {
+    if (slot.nativeParams) {
+      const assets = [];
+      addAsset(assets, titleAsset(assets.length + 1, slot.nativeParams.title, NATIVE_DEFAULTS.TITLE_LEN));
+      addAsset(assets, dataAsset(assets.length + 1, slot.nativeParams.body, 2, NATIVE_DEFAULTS.DESCR_LEN));
+      addAsset(assets, dataAsset(assets.length + 1, slot.nativeParams.sponsoredBy, 1, NATIVE_DEFAULTS.SPONSORED_BY_LEN));
+      addAsset(assets, imageAsset(assets.length + 1, slot.nativeParams.icon, 1, NATIVE_DEFAULTS.ICON_MIN, NATIVE_DEFAULTS.ICON_MIN));
+      addAsset(assets, imageAsset(assets.length + 1, slot.nativeParams.image, 3, NATIVE_DEFAULTS.IMG_MIN, NATIVE_DEFAULTS.IMG_MIN));
+      return {
+        request: JSON.stringify({ assets }),
+        ver: '1.1',
+      };
+    }
+    return null;
+  }
+
+  /**
+   * Helper method to add an asset to the assets list.
+   */
+  function addAsset(assets, asset) {
+    if(asset) {
+      assets.push(asset);
+    }
+  }
+
+  /**
+   * Produces a Native Title asset for the configuration given.
+   */
+  function titleAsset(id, params, defaultLen) {
+    if (params) {
+      return {
+        id: id,
+        required: params.required ? 1 : 0,
+        title: {
+          len: params.len || defaultLen,
+        },
+      };
+    }
+    return null;
+  }
+
+  /**
+   * Produces a Native Image asset for the configuration given.
+   */
+  function imageAsset(id, params, type, defaultMinWidth, defaultMinHeight) {
+    return params ? {
+      id: id,
+      required: params.required ? 1 : 0,
+      img: {
+        type,
+        wmin: params.wmin || defaultMinWidth,
+        hmin: params.hmin || defaultMinHeight,
+      }
+    } : null;
+  }
+
+  /**
+   * Produces a Native Data asset for the configuration given.
+   */
+  function dataAsset(id, params, type, defaultLen) {
+    return params ? {
+      id: id,
+      required: params.required ? 1 : 0,
+      data: {
+        type,
+        len: params.len || defaultLen,
+      }
+    } : null;
+  }
+
+  /**
+   * Produces an OpenRTB site object.
+   */
+  function site(bidderRequest) {
+    const pubId = bidderRequest.bids.length > 0 ? bidderRequest.bids[0].params.cp : '0';
     return {
-      cn: 1,
-      ca: 'BID',
-      tl: 1,
-      'if': 0,
-      cwu: getTopWindowLocation().href,
-      cwr: referrer(),
-      dw: document.documentElement.clientWidth,
-      cxy: document.documentElement.clientWidth + ',' + document.documentElement.clientHeight,
-      tz: new Date().getTimezoneOffset(),
-      ln: (navigator.language || navigator.browserLanguage || navigator.userLanguage || navigator.systemLanguage)
+      publisher: {
+        id: pubId.toString(),
+      },
+      ref: referrer(),
+      page: getTopWindowLocation().href,
     };
   }
 
+  /**
+   * Attempts to capture the referrer url.
+   */
   function referrer() {
     try {
       return window.top.document.referrer;
@@ -52,40 +210,92 @@ function PulsePointLiteAdapter() {
     }
   }
 
-  function bidResponseAvailable(bidRequest, rawResponse) {
-    if (rawResponse) {
-      var bidResponse = parse(rawResponse);
-      if (bidResponse) {
-        var adSize = bidRequest.params.cf.toUpperCase().split('X');
-        var bid = createBid(STATUS.GOOD, bidRequest);
-        bid.bidderCode = bidRequest.bidder;
-        bid.cpm = bidResponse.bidCpm;
-        bid.ad = bidResponse.html;
-        bid.width = adSize[0];
-        bid.height = adSize[1];
-        addBidResponse(bidRequest.placementCode, bid);
-        return;
-      }
-    }
-    var passback = createBid(STATUS.NO_BID, bidRequest);
-    passback.bidderCode = bidRequest.bidder;
-    addBidResponse(bidRequest.placementCode, passback);
+  /**
+   * Produces an OpenRTB Device object.
+   */
+  function device() {
+    return {
+      ua: navigator.userAgent,
+      language: (navigator.language || navigator.browserLanguage || navigator.userLanguage || navigator.systemLanguage),
+    };
   }
 
+  /**
+   * Safely parses the input given. Returns null on
+   * parsing failure.
+   */
   function parse(rawResponse) {
     try {
-      return JSON.parse(rawResponse);
+      if(rawResponse) {
+        return JSON.parse(rawResponse);
+      }
     } catch (ex) {
-      logError('pulsepoint.safeParse', 'ERROR', ex);
-      return null;
+      logError('pulsepointLite.safeParse', 'ERROR', ex);
+    }
+    return null;
+  }
+
+  /**
+   * Determines the AdSize for the slot.
+   */
+  function adSize(slot) {
+    if(slot.params.cf) {
+      const size = slot.params.cf.toUpperCase().split('X');
+      const width = parseInt(slot.params.cw || size[0], 10);
+      const height = parseInt(slot.params.ch || size[1], 10);
+      return [width, height];
     }
+    return [1, 1];
+  }
+
+  /**
+   * Parses the native response from the Bid given.
+   */
+  function nativeResponse(slot, bid) {
+    if(slot.nativeParams) {
+      const nativeAd = parse(bid.adm);
+      const keys = {};
+      if(nativeAd && nativeAd.native && nativeAd.native.assets) {
+        nativeAd.native.assets.forEach((asset) => {
+          keys.title = asset.title ? asset.title.text : keys.title;
+          keys.body = asset.data && asset.data.type === 2 ? asset.data.value : keys.body;
+          keys.sponsoredBy = asset.data && asset.data.type === 1 ? asset.data.value : keys.sponsoredBy;
+          keys.image = asset.img && asset.img.type === 3 ? asset.img.url : keys.image;
+          keys.icon = asset.img && asset.img.type === 1 ? asset.img.url : keys.icon;
+        });
+        if (nativeAd.native.link) {
+          keys.clickUrl = encodeURIComponent(nativeAd.native.link.url);
+        }
+        keys.impressionTrackers = nativeAd.native.imptrackers;
+        return keys;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Parses the native response from the Bid given.
+   */
+  function isNative(slot) {
+    return slot.nativeParams ? true : false;
   }
 
   return {
     callBids: _callBids
   };
 }
 
-adaptermanager.registerBidAdapter(new PulsePointLiteAdapter, 'pulsepointLite');
+/**
+ * "pulseLite" will be the adapter name going forward. "pulsepointLite" to be
+ * deprecated, but kept here for backwards compatibility.
+ * Reason is key truncation. When the Publisher opts for sending all bids to DFP, then
+ * the keys get truncated due to the limit in key-size (20 characters, detailed
+ * here https://support.google.com/dfp_premium/answer/1628457?hl=en). Here is an
+ * example, where keys got truncated when using the "pulsepointLite" alias - "hb_adid_pulsepointLi=1300bd87d59c4c2"
+*/
+adaptermanager.registerBidAdapter(new PulsePointLiteAdapter, 'pulseLite', {
+  supportedMediaTypes: [ 'native' ]
+});
+adaptermanager.aliasBidAdapter('pulseLite', 'pulsepointLite');
 
 module.exports = PulsePointLiteAdapter;