AMX Bid Adapter: add support for overriding bidderCode (allowAlternateBidderCodes) (prebid#11712)

* add support for overriding bidderCode (allowAlternateBidderCodes) in AMX Bid adapter

* fix formatting and actually run tests

Author: nickjacob

modules/amxBidAdapter.js

@@ -454,6 +454,10 @@ export const spec = {
       setUIDSafe(response.am);
     }
 
+    const bidderSettings = config.getConfig('bidderSettings');
+    const settings = bidderSettings?.amx ?? bidderSettings?.standard ?? {};
+    const allowAlternateBidderCodes = !!settings.allowAlternateBidderCodes;
+
     return flatMap(Object.keys(response.r), (bidID) => {
       return flatMap(response.r[bidID], (siteBid) =>
         siteBid.b.map((bid) => {
@@ -466,8 +470,10 @@ export const spec = {
 
           const size = resolveSize(bid, request.data, bidID);
           const defaultExpiration = mediaType === BANNER ? 240 : 300;
+          const { bc: bidderCode, ds: demandSource } = bid.ext ?? {};
 
           return {
+            ...(bidderCode != null && allowAlternateBidderCodes ? { bidderCode } : {}),
             requestId: bidID,
             cpm: bid.price,
             width: size[0],
@@ -479,6 +485,7 @@ export const spec = {
             meta: {
               advertiserDomains: bid.adomain,
               mediaType,
+              ...(demandSource != null ? { demandSource } : {}),
             },
             mediaType,
             ttl: typeof bid.exp === 'number' ? bid.exp : defaultExpiration,

test/spec/modules/amxBidAdapter_spec.js

@@ -583,6 +583,55 @@ describe('AmxBidAdapter', () => {
       expect(parsed).to.eql([]);
     });
 
+    it('will read an bidderCode override from bid.ext.prebid.meta', () => {
+      const currentConfig = config.getConfig();
+      config.setConfig({
+        ...currentConfig,
+        bidderSettings: {
+          amx: {
+            allowAlternateBidderCodes: true
+          }
+        }
+      });
+
+      const parsed = spec.interpretResponse(
+        { body: {
+          ...sampleServerResponse,
+          r: {
+            [sampleRequestId]: [{
+              ...sampleServerResponse.r[sampleRequestId][0],
+              b: [{
+                ...sampleServerResponse.r[sampleRequestId][0].b[0],
+                ext: {
+                  bc: 'amx-pmp',
+                  ds: 'example',
+                }
+              }]
+            }]
+          }}},
+        baseRequest
+      );
+
+      config.setConfig(currentConfig);
+      expect(parsed.length).to.equal(1); // we removed one
+
+      // we should have display, video, display
+      expect(parsed[0]).to.deep.equal({
+        ...baseBidResponse,
+        meta: {
+          ...baseBidResponse.meta,
+          mediaType: BANNER,
+          demandSource: 'example'
+        },
+        mediaType: BANNER,
+        bidderCode: 'amx-pmp',
+        width: 300,
+        height: 600, // from the bid itself
+        ttl: 90,
+        ad: sampleDisplayAd,
+      });
+    });
+
     it('can parse a display ad', () => {
       const parsed = spec.interpretResponse(
         { body: sampleServerResponse },