Rubicon Bid Adapter: Pass on carbon segtaxes

modules/rubiconBidAdapter.js

@@ -528,6 +528,9 @@ export const spec = {
     if (bidRequest?.ortb2Imp?.ext?.ae) {
       data['o_ae'] = 1;
     }
+
+    addDesiredSegtaxes(bidderRequest, data);
+
     // loop through userIds and add to request
     if (bidRequest.userIdAsEids) {
       bidRequest.userIdAsEids.forEach(eid => {
@@ -1001,6 +1004,22 @@ function applyFPD(bidRequest, mediaType, data) {
   }
 }
 
+function addDesiredSegtaxes(bidderRequest, target) {
+  if (rubiConf.readTopics === false) {
+    return;
+  }
+  let iSegments = [1, 2, 5, 6, 507].concat(rubiConf.sendUserSegtax?.map(seg => Number(seg)));
+  let vSegments = [4, 508].concat(rubiConf.sendSiteSegtax?.map(seg => Number(seg)));
+  let userData = bidderRequest.ortb2?.user?.data || [];
+  userData.forEach(topic => {
+    const taxonomy = Number(topic.ext?.segtax);
+    let char;
+    if ((iSegments.includes(taxonomy) && (char = 'i')) || (vSegments.includes(taxonomy) && (char = 'v'))) {
+      target[`tg_${char}.tax${taxonomy}`] = topic.segment?.map(seg => seg.id).join(',')
+    }
+  })
+}
+
 /**
  * @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['tg_i.tax507']).is.equal('1,2');
+          expect(slotParams['tg_v.tax508']).is.equal('3,4');
+        });
       });
 
       describe('classifiedAsVideo', function () {