GPT Pre Auction: setting GPID

modules/gptPreAuction.js

@@ -55,15 +55,16 @@ export const appendPbAdSlot = adUnit => {
   const context = adUnit.ortb2Imp.ext.data;
   const { customPbAdSlot } = _currentConfig;
 
-  if (customPbAdSlot) {
-    context.pbadslot = customPbAdSlot(adUnit.code, deepAccess(context, 'adserver.adslot'));
+  // use context.pbAdSlot if set (if someone set it already, it will take precedence over others)
+  if (context.pbadslot) {
     return;
   }
 
-  // use context.pbAdSlot if set
-  if (context.pbadslot) {
+  if (customPbAdSlot) {
+    context.pbadslot = customPbAdSlot(adUnit.code, deepAccess(context, 'adserver.adslot'));
     return;
   }
+
   // use data attribute 'data-adslotid' if set
   try {
     const adUnitCodeDiv = document.getElementById(adUnit.code);
@@ -78,12 +79,17 @@ export const appendPbAdSlot = adUnit => {
     return;
   }
   context.pbadslot = adUnit.code;
+  return true;
 };
 
 export const makeBidRequestsHook = (fn, adUnits, ...args) => {
   appendGptSlots(adUnits);
   adUnits.forEach(adUnit => {
-    appendPbAdSlot(adUnit);
+    const usedAdUnitCode = appendPbAdSlot(adUnit);
+    // gpid should be set to itself if already set, or to what pbadslot was (as long as it was not adUnit code)
+    if (!adUnit.ortb2Imp.ext.gpid && !usedAdUnitCode) {
+      adUnit.ortb2Imp.ext.gpid = adUnit.ortb2Imp.ext.data.pbadslot;
+    }
   });
   return fn.call(this, adUnits, ...args);
 };

test/spec/modules/gptPreAuction_spec.js

@@ -197,15 +197,69 @@ describe('GPT pre-auction module', () => {
         code: 'slotCode3',
       }];
 
+      // first two adUnits directly pass in pbadslot => gpid is same
       const expectedAdUnits = [{
         code: 'adUnit1',
-        ortb2Imp: { ext: { data: { pbadslot: '12345' } } }
-      }, {
+        ortb2Imp: {
+          ext: {
+            data: {
+              pbadslot: '12345'
+            },
+            gpid: '12345'
+          }
+        }
+      },
+      // second adunit
+      {
         code: 'slotCode1',
-        ortb2Imp: { ext: { data: { pbadslot: '67890', adserver: { name: 'gam', adslot: 'slotCode1' } } } }
+        ortb2Imp: {
+          ext: {
+            data: {
+              pbadslot: '67890',
+              adserver: {
+                name: 'gam',
+                adslot: 'slotCode1'
+              }
+            },
+            gpid: '67890'
+          }
+        }
       }, {
         code: 'slotCode3',
-        ortb2Imp: { ext: { data: { pbadslot: 'slotCode3', adserver: { name: 'gam', adslot: 'slotCode3' } } } }
+        ortb2Imp: {
+          ext: {
+            data: {
+              pbadslot: 'slotCode3',
+              adserver: {
+                name: 'gam',
+                adslot: 'slotCode3'
+              }
+            },
+            gpid: 'slotCode3'
+          }
+        }
+      }];
+
+      window.googletag.pubads().setSlots(testSlots);
+      runMakeBidRequests(testAdUnits);
+      expect(returnedAdUnits).to.deep.equal(expectedAdUnits);
+    });
+
+    it('should not apply gpid if pbadslot was set by adUnitCode', () => {
+      const testAdUnits = [{
+        code: 'noMatchCode',
+      }];
+
+      // first two adUnits directly pass in pbadslot => gpid is same
+      const expectedAdUnits = [{
+        code: 'noMatchCode',
+        ortb2Imp: {
+          ext: {
+            data: {
+              pbadslot: 'noMatchCode'
+            },
+          }
+        }
       }];
 
       window.googletag.pubads().setSlots(testSlots);