From 049962fbf444c1d12064ad5f02f5177285b79411 Mon Sep 17 00:00:00 2001
From: Benoit Liabastre <b.liabastre@gmail.com>
Date: Wed, 17 Nov 2021 15:59:35 +0100
Subject: [PATCH] AdomikAnalyticsAdapter sampling

---
 modules/adomikAnalyticsAdapter.js             | 34 +++++++++++++------
 .../modules/adomikAnalyticsAdapter_spec.js    |  2 ++
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/modules/adomikAnalyticsAdapter.js b/modules/adomikAnalyticsAdapter.js
index d17bcfd27aa..e81f6e50054 100644
--- a/modules/adomikAnalyticsAdapter.js
+++ b/modules/adomikAnalyticsAdapter.js
@@ -14,6 +14,8 @@ const bidWon = CONSTANTS.EVENTS.BID_WON;
 const bidTimeout = CONSTANTS.EVENTS.BID_TIMEOUT;
 const ua = navigator.userAgent;
 
+var _sampled = true;
+
 let adomikAdapter = Object.assign(adapter({}),
   {
     // Track every event needed
@@ -81,6 +83,7 @@ adomikAdapter.sendTypedEvent = function() {
     uid: adomikAdapter.currentContext.uid,
     ahbaid: adomikAdapter.currentContext.id,
     hostname: window.location.hostname,
+    sampling: adomikAdapter.currentContext.sampling,
     eventsByPlacementCode: groupedTypedEvents.map(function(typedEventsByType) {
       let sizes = [];
       const eventKeys = ['request', 'response', 'winner'];
@@ -203,19 +206,28 @@ adomikAdapter.adapterEnableAnalytics = adomikAdapter.enableAnalytics;
 
 adomikAdapter.enableAnalytics = function (config) {
   adomikAdapter.currentContext = {};
-
   const initOptions = config.options;
-  if (initOptions) {
-    adomikAdapter.currentContext = {
-      uid: initOptions.id,
-      url: initOptions.url,
-      testId: initOptions.testId,
-      testValue: initOptions.testValue,
-      id: '',
-      timeouted: false,
+
+  _sampled = typeof config === 'undefined' ||
+             typeof config.sampling === 'undefined' ||
+             Math.random() < parseFloat(config.sampling);
+
+  if (_sampled) {
+    if (initOptions) {
+      adomikAdapter.currentContext = {
+        uid: initOptions.id,
+        url: initOptions.url,
+        testId: initOptions.testId,
+        testValue: initOptions.testValue,
+        id: '',
+        timeouted: false,
+        sampling: config.sampling
+      }
+      logInfo('Adomik Analytics enabled with config', initOptions);
+      adomikAdapter.adapterEnableAnalytics(config);
     }
-    logInfo('Adomik Analytics enabled with config', initOptions);
-    adomikAdapter.adapterEnableAnalytics(config);
+  } else {
+    logInfo('Adomik Analytics ignored for sampling', config.sampling);
   }
 };
 
diff --git a/test/spec/modules/adomikAnalyticsAdapter_spec.js b/test/spec/modules/adomikAnalyticsAdapter_spec.js
index 0ecdb0e10c7..1e3f437bbbe 100644
--- a/test/spec/modules/adomikAnalyticsAdapter_spec.js
+++ b/test/spec/modules/adomikAnalyticsAdapter_spec.js
@@ -73,6 +73,7 @@ describe('Adomik Prebid Analytic', function () {
       expect(adomikAnalytics.currentContext).to.deep.equal({
         uid: '123456',
         url: 'testurl',
+        sampling: undefined,
         testId: '12345',
         testValue: '1000',
         id: '',
@@ -85,6 +86,7 @@ describe('Adomik Prebid Analytic', function () {
       expect(adomikAnalytics.currentContext).to.deep.equal({
         uid: '123456',
         url: 'testurl',
+        sampling: undefined,
         testId: '12345',
         testValue: '1000',
         id: 'test-test-test',