From 0c0f9eb070e61f1f43c014062d3c5df1ccfd12e4 Mon Sep 17 00:00:00 2001
From: dsjackins <daniel.jackins@segment.com>
Date: Tue, 26 Oct 2021 09:52:30 -0700
Subject: [PATCH] Add option to use amplitude referral behaviour (#639)

* Add option to use amplitude referral

* bump version
---
 integrations/amplitude/lib/index.js | 5 ++++-
 integrations/amplitude/package.json | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/integrations/amplitude/lib/index.js b/integrations/amplitude/lib/index.js
index 911a006ea..33a72ed12 100644
--- a/integrations/amplitude/lib/index.js
+++ b/integrations/amplitude/lib/index.js
@@ -53,6 +53,7 @@ var Amplitude = (module.exports = integration('Amplitude')
   .option('unsetParamsReferrerOnNewSession', false)
   .option('trackProductsOnce', false)
   .option('versionName', '')
+  .option('useAmplitudeReferral', false)
   .tag('<script src="' + src + '">'));
 
 /**
@@ -81,6 +82,7 @@ Amplitude.prototype.initialize = function() {
     includeGclid: this.options.trackGclid,
     saveParamsReferrerOncePerSession: this.options
       .saveParamsReferrerOncePerSession,
+    includeReferrer: this.options.useAmplitudeReferral,
     deviceIdFromUrlParam: this.options.deviceIdFromUrlParam,
     unsetParamsReferrerOnNewSession: this.options
       .unsetParamsReferrerOnNewSession,
@@ -144,7 +146,8 @@ Amplitude.prototype.loaded = function() {
 Amplitude.prototype.page = function(page) {
   this.setDeviceIdFromAnonymousId(page);
 
-  if (this.options.trackReferrer) this.sendReferrer();
+  if (this.options.trackReferrer && !this.options.useAmplitudeReferral)
+    this.sendReferrer();
 
   var category = page.category();
   var name = page.fullName();
diff --git a/integrations/amplitude/package.json b/integrations/amplitude/package.json
index f38ad6e12..c8978196e 100644
--- a/integrations/amplitude/package.json
+++ b/integrations/amplitude/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@segment/analytics.js-integration-amplitude",
   "description": "The Amplitude analytics.js integration.",
-  "version": "3.3.2",
+  "version": "3.3.3",
   "keywords": [
     "analytics.js",
     "analytics.js-integration",