TripleLift: User sync fallback (prebid#4509)

* Add IdentityLink support and fix UnifiedId.

It appears we've been looking for UnifiedId userIds
on the bidderRequest object, when they are found on bidRequests.
This commit fixes that error, and adds support for IdentityLink.

* change maintainer email to group

* TripleLift: Sending schain (#1)

* Sending schain

* null -> undefined

* Hardcode sync endpoint protocol

* Switch to EB2 sync endpoint

* Add support for image based user syncing

* Rename endpoint variable

* Add assertion

modules/tripleliftBidAdapter.js

@@ -63,21 +63,34 @@ export const tripleliftAdapterSpec = {
   },
 
   getUserSyncs: function(syncOptions) {
-    let ibCall = '//ib.3lift.com/sync?';
-    if (consentString !== null) {
-      ibCall = utils.tryAppendQueryString(ibCall, 'gdpr', gdprApplies);
-      ibCall = utils.tryAppendQueryString(ibCall, 'cmp_cs', consentString);
+    let syncType = _getSyncType(syncOptions);
+    if (!syncType) return;
+
+    let syncEndpoint = 'https://eb2.3lift.com/sync?';
+
+    if (syncType === 'image') {
+      syncEndpoint = utils.tryAppendQueryString(syncEndpoint, 'px', 1);
+      syncEndpoint = utils.tryAppendQueryString(syncEndpoint, 'src', 'prebid');
     }
 
-    if (syncOptions.iframeEnabled) {
-      return [{
-        type: 'iframe',
-        url: ibCall
-      }];
+    if (consentString !== null) {
+      syncEndpoint = utils.tryAppendQueryString(syncEndpoint, 'gdpr', gdprApplies);
+      syncEndpoint = utils.tryAppendQueryString(syncEndpoint, 'cmp_cs', consentString);
     }
+
+    return [{
+      type: syncType,
+      url: syncEndpoint
+    }];
   }
 }
 
+function _getSyncType(syncOptions) {
+  if (!syncOptions) return;
+  if (syncOptions.iframeEnabled) return 'iframe';
+  if (syncOptions.pixelEnabled) return 'image';
+}
+
 function _buildPostBody(bidRequests) {
   let data = {};
   let { schain } = bidRequests[0];

test/spec/modules/tripleliftBidAdapter_spec.js

@@ -5,6 +5,7 @@ import { deepClone } from 'src/utils';
 import prebid from '../../../package.json';
 
 const ENDPOINT = 'https://tlx.3lift.com/header/auction?';
+const GDPR_CONSENT_STR = 'BOONm0NOONm0NABABAENAa-AAAARh7______b9_3__7_9uz_Kv_K7Vf7nnG072lPVA9LTOQ6gEaY';
 
 describe('triplelift adapter', function () {
   const adapter = newBidder(tripleliftAdapterSpec);
@@ -107,7 +108,7 @@ describe('triplelift adapter', function () {
           referer: 'http://examplereferer.com'
         },
         gdprConsent: {
-          consentString: 'BOONm0NOONm0NABABAENAa-AAAARh7______b9_3__7_9uz_Kv_K7Vf7nnG072lPVA9LTOQ6gEaY',
+          consentString: GDPR_CONSENT_STR,
           gdprApplies: true
         },
       };
@@ -281,7 +282,7 @@ describe('triplelift adapter', function () {
         referer: 'http://examplereferer.com'
       },
       gdprConsent: {
-        consentString: 'BOONm0NOONm0NABABAENAa-AAAARh7______b9_3__7_9uz_Kv_K7Vf7nnG072lPVA9LTOQ6gEaY',
+        consentString: GDPR_CONSENT_STR,
         gdprApplies: true
       }
     };
@@ -355,12 +356,50 @@ describe('triplelift adapter', function () {
           referer: 'http://examplereferer.com'
         },
         gdprConsent: {
-          consentString: 'BOONm0NOONm0NABABAENAa-AAAARh7______b9_3__7_9uz_Kv_K7Vf7nnG072lPVA9LTOQ6gEaY',
+          consentString: GDPR_CONSENT_STR,
           gdprApplies: true
         }
       };
       let result = tripleliftAdapterSpec.interpretResponse(response, {bidderRequest});
       expect(result).to.have.length(2);
     });
   });
+
+  describe('getUserSyncs', function() {
+    let expectedIframeSyncUrl = 'https://eb2.3lift.com/sync?gdpr=true&cmp_cs=' + GDPR_CONSENT_STR + '&';
+    let expectedImageSyncUrl = 'https://eb2.3lift.com/sync?px=1&src=prebid&gdpr=true&cmp_cs=' + GDPR_CONSENT_STR + '&';
+
+    it('returns undefined when syncing is not enabled', function() {
+      expect(tripleliftAdapterSpec.getUserSyncs({})).to.equal(undefined);
+      expect(tripleliftAdapterSpec.getUserSyncs()).to.equal(undefined);
+    });
+
+    it('returns iframe user sync pixel when iframe syncing is enabled', function() {
+      let syncOptions = {
+        iframeEnabled: true
+      };
+      let result = tripleliftAdapterSpec.getUserSyncs(syncOptions);
+      expect(result[0].type).to.equal('iframe');
+      expect(result[0].url).to.equal(expectedIframeSyncUrl);
+    });
+
+    it('returns image user sync pixel when iframe syncing is disabled', function() {
+      let syncOptions = {
+        pixelEnabled: true
+      };
+      let result = tripleliftAdapterSpec.getUserSyncs(syncOptions);
+      expect(result[0].type).to.equal('image')
+      expect(result[0].url).to.equal(expectedImageSyncUrl);
+    });
+
+    it('returns iframe user sync pixel when both options are enabled', function() {
+      let syncOptions = {
+        pixelEnabled: true,
+        iframeEnabled: true
+      };
+      let result = tripleliftAdapterSpec.getUserSyncs(syncOptions);
+      expect(result[0].type).to.equal('iframe');
+      expect(result[0].url).to.equal(expectedIframeSyncUrl);
+    });
+  });
 });