From d5d61ca78a772f8df7e2f64e2768cc638ebf485d Mon Sep 17 00:00:00 2001
From: Jason Snellbaker <jsnellbaker@appnexus.com>
Date: Mon, 11 Apr 2022 15:35:13 -0400
Subject: [PATCH] appnexus bid adapter - support mediaTypes pos field

---
 modules/appnexusBidAdapter.js                |  7 +++
 test/spec/modules/appnexusBidAdapter_spec.js | 51 +++++++++++++++++++-
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/modules/appnexusBidAdapter.js b/modules/appnexusBidAdapter.js
index 2758fc2d03a..418b8e6fe2e 100644
--- a/modules/appnexusBidAdapter.js
+++ b/modules/appnexusBidAdapter.js
@@ -802,6 +802,13 @@ function bidToTag(bid) {
   }
   if (bid.params.position) {
     tag.position = { 'above': 1, 'below': 2 }[bid.params.position] || 0;
+  } else {
+    let mediaTypePos = deepAccess(bid, `mediaTypes.banner.pos`) || deepAccess(bid, `mediaTypes.video.pos`);
+    // only support unknown, atf, and btf values for position at this time
+    if (mediaTypePos === 0 || mediaTypePos === 1 || mediaTypePos === 3) {
+      // ortb spec treats btf === 3, but our system interprets btf === 2; so converting the ortb value here for consistency
+      tag.position = (mediaTypePos === 3) ? 2 : mediaTypePos;
+    }
   }
   if (bid.params.trafficSourceCode) {
     tag.traffic_source_code = bid.params.trafficSourceCode;
diff --git a/test/spec/modules/appnexusBidAdapter_spec.js b/test/spec/modules/appnexusBidAdapter_spec.js
index 11e92a1af2e..9ee236ed62a 100644
--- a/test/spec/modules/appnexusBidAdapter_spec.js
+++ b/test/spec/modules/appnexusBidAdapter_spec.js
@@ -100,6 +100,55 @@ describe('AppNexusAdapter', function () {
       expect(payload.tags[0].private_sizes).to.deep.equal([{width: 300, height: 250}]);
     });
 
+    it('should add position in request', function() {
+      // set from bid.params
+      let bidRequest = deepClone(bidRequests[0]);
+      bidRequest.params.position = 'above';
+
+      const request = spec.buildRequests([bidRequest]);
+      const payload = JSON.parse(request.data);
+
+      expect(payload.tags[0].position).to.exist;
+      expect(payload.tags[0].position).to.deep.equal(1);
+
+      // set from mediaTypes.banner.pos = 1
+      bidRequest = deepClone(bidRequests[0]);
+      bidRequest.mediaTypes = {
+        banner: { pos: 1 }
+      };
+
+      const request2 = spec.buildRequests([bidRequest]);
+      const payload2 = JSON.parse(request2.data);
+
+      expect(payload2.tags[0].position).to.exist;
+      expect(payload2.tags[0].position).to.deep.equal(1);
+
+      // set from mediaTypes.video.pos = 3
+      bidRequest = deepClone(bidRequests[0]);
+      bidRequest.mediaTypes = {
+        video: { pos: 3 }
+      };
+
+      const request3 = spec.buildRequests([bidRequest]);
+      const payload3 = JSON.parse(request3.data);
+
+      expect(payload3.tags[0].position).to.exist;
+      expect(payload3.tags[0].position).to.deep.equal(2);
+
+      // bid.params trumps mediatypes
+      bidRequest = deepClone(bidRequests[0]);
+      bidRequest.params.position = 'above';
+      bidRequest.mediaTypes = {
+        banner: { pos: 3 }
+      };
+
+      const request4 = spec.buildRequests([bidRequest]);
+      const payload4 = JSON.parse(request4.data);
+
+      expect(payload4.tags[0].position).to.exist;
+      expect(payload4.tags[0].position).to.deep.equal(1);
+    });
+
     it('should add publisher_id in request', function() {
       let bidRequest = Object.assign({},
         bidRequests[0],
@@ -116,7 +165,7 @@ describe('AppNexusAdapter', function () {
       expect(payload.tags[0].publisher_id).to.deep.equal(1231234);
       expect(payload.publisher_id).to.exist;
       expect(payload.publisher_id).to.deep.equal(1231234);
-    })
+    });
 
     it('should add source and verison to the tag', function () {
       const request = spec.buildRequests(bidRequests);