allows multiple bids to be registered per a slot, related to #496 (#503)

* allows multiple bids to be registered per a slot, related to #496

* keep track of bid request in rubicon adapter to use when calling createBid

src/adapters/rubicon.js

@@ -59,7 +59,7 @@ var RubiconAdapter = function RubiconAdapter() {
    * @return {Bid} a bid, for prebid
    */
   function _errorBid(response, ads) {
-    var bidResponse = bidfactory.createBid(2);
+    var bidResponse = bidfactory.createBid(2, response.bid);
     bidResponse.bidderCode = RUBICON_BIDDER_CODE;
 
     // use the raw ads as the 'error'
@@ -99,59 +99,70 @@ var RubiconAdapter = function RubiconAdapter() {
   }
 
   /**
-   * Create a (successful) bid for a unit,
+   * Create (successful) bids for a unit,
    * based on the given response
    * @param {String} placement placement code/unit path
    * @param {Object} response the response from rubicon
    * @return {Bid} a bid objectj
    */
-  function _makeBid(response, ads) {
+  function _makeBids(response, ads) {
 
     // if there are multiple ads, sort by CPM
     ads = ads.sort(_adCpmSort);
 
-    var bidResponse = bidfactory.createBid(1);
-    var ad = ads[0];
-    var size = ad.dimensions;
+    var bidResponses = [];
 
-    if (!size) {
-      // this really shouldn't happen
-      utils.logError('no dimensions given', RUBICON_BIDDER_CODE, ad);
-      return _errorBid(response, ads);
-    }
+    ads.forEach(function(ad) {
 
-    bidResponse.bidderCode = RUBICON_BIDDER_CODE;
-    bidResponse.cpm = ad.cpm;
+      var bidResponse,
+          size = ad.dimensions;
 
-    // the element id is what the iframe will use to render
-    // itself using the rubicontag.renderCreative API
-    bidResponse.ad = _creative(response.getElementId(), size);
-    bidResponse.width = size[0];
-    bidResponse.height = size[1];
+      if (!size) {
+        // this really shouldn't happen
+        utils.logError('no dimensions given', RUBICON_BIDDER_CODE, ad);
+        bidResponse = _errorBid(response, ads);
+      } else {
+        bidResponse = bidfactory.createBid(1, response.bid);
 
-    // DealId
-    if (ads.deal !== undefined && ads.deal !== "") {
-      bidResponse.dealId = ads.deal;
-    }
+        bidResponse.bidderCode = RUBICON_BIDDER_CODE;
+        bidResponse.cpm = ad.cpm;
 
-    return bidResponse;
+        // the element id is what the iframe will use to render
+        // itself using the rubicontag.renderCreative API
+        bidResponse.ad = _creative(response.getElementId(), size);
+        bidResponse.width = size[0];
+        bidResponse.height = size[1];
+
+        // DealId
+        if (ads.deal) {
+          bidResponse.dealId = ads.deal;
+        }
+      }
+
+      bidResponses.push(bidResponse);
+
+    });
+
+    return bidResponses;
   }
 
   /**
-   * Add a success/error bid based
+   * Add success/error bids based
    * on the response from rubicon
    * @param {Object} response -- AJAX response from fastlane
    */
-  function _addBid(response, ads) {
+  function _addBids(response, ads) {
     // get the bid for the placement code
-    var bid;
+    var bids;
     if (!ads || ads.length === 0) {
-      bid = _errorBid(response, ads);
+      bids = [ _errorBid(response, ads) ];
     } else {
-      bid = _makeBid(response, ads);
+      bids = _makeBids(response, ads);
     }
 
-    bidmanager.addBidResponse(response.getElementId(), bid);
+    bids.forEach(function(bid) {
+      bidmanager.addBidResponse(response.getElementId(), bid);
+    });
   }
 
   /**
@@ -211,7 +222,7 @@ var RubiconAdapter = function RubiconAdapter() {
 
   /**
    * Define the slot using the rubicontag.defineSlot API
-   * @param {Object} Bidrequest
+   * @param {Object} bid
    * @returns {RubiconSlot} Instance of RubiconSlot
    */
   function _defineSlot(bid) {
@@ -251,6 +262,8 @@ var RubiconAdapter = function RubiconAdapter() {
 
     slot.addKW(keywords);
 
+    slot.bid = bid;
+
     return slot;
   }
 
@@ -265,7 +278,7 @@ var RubiconAdapter = function RubiconAdapter() {
     utils.logMessage('Rubicon Project bidding complete: ' + ((new Date).getTime() - _bidStart));
 
     utils._each(slots, function (slot) {
-      _addBid(slot, slot.getRawResponses());
+      _addBids(slot, slot.getRawResponses());
     });
   }