Rubicon Bid Adapter: Pass on carbon segtaxes

modules/rubiconBidAdapter.js

@@ -528,6 +528,13 @@ export const spec = {
     if (bidRequest?.ortb2Imp?.ext?.ae) {
       data['o_ae'] = 1;
     }
+
+    const topics = getCarbonTopics(bidderRequest);
+    if (topics) {
+      Object.keys(topics).forEach(field => {
+        data[field] = topics[field];
+      });
+    }
     // loop through userIds and add to request
     if (bidRequest.userIdAsEids) {
       bidRequest.userIdAsEids.forEach(eid => {
@@ -1001,6 +1008,23 @@ function applyFPD(bidRequest, mediaType, data) {
   }
 }
 
+function getCarbonTopics(bidderRequest) {
+  if (rubiConf.readTopics === false) {
+    return undefined;
+  }
+  let fields = {};
+  let userData = bidderRequest.ortb2?.user?.data || [];
+  userData.forEach(topic => {
+    const taxonomy = topic.ext?.segtax;
+    if (taxonomy == 507 || taxonomy == 508) {
+      const domain = bidderRequest.refererInfo.domain;
+      fields[`s_segs_${taxonomy}_${domain}`] = topic.segment?.map(seg => seg.id).join(',')
+    }
+  })
+  let hasProps = Object.keys(fields).length > 0;
+  return hasProps ? fields : undefined;
+}
+
 /**
  * @param sizes
  * @returns {*}

test/spec/modules/rubiconBidAdapter_spec.js

@@ -2718,6 +2718,32 @@ describe('the rubicon adapter', function () {
 
           expect(slotParams['o_ae']).to.equal(1)
         });
+
+        it('should pass along Carbon segtaxes, but not non-Carbon ones', () => {
+          const localBidderRequest = Object.assign({}, bidderRequest);
+          localBidderRequest.refererInfo = {domain: 'bob'};
+          localBidderRequest.ortb2.user = {
+            data: [{
+              ext: {
+                segtax: '404'
+              },
+              segment: [{id: 5}, {id: 6}]
+            }, {
+              ext: {
+                segtax: '507'
+              },
+              segment: [{id: 1}, {id: 2}]
+            }, {
+              ext: {
+                segtax: '508'
+              },
+              segment: [{id: 3}, {id: 4}]
+            }]
+          }
+          const slotParams = spec.createSlotParams(bidderRequest.bids[0], localBidderRequest);
+          expect(slotParams.s_segs_507_bob).is.equal('1,2');
+          expect(slotParams.s_segs_508_bob).is.equal('3,4');
+        });
       });
 
       describe('classifiedAsVideo', function () {