From bdf0636081359db846f05c02c0b8060a4071a505 Mon Sep 17 00:00:00 2001
From: Matt Loar <matt@loar.name>
Date: Fri, 26 Jun 2020 09:43:06 -0500
Subject: [PATCH] Support Limited Data Use in Facebook Pixel

---
 integrations/facebook-pixel/lib/index.js       | 4 ++++
 integrations/facebook-pixel/test/index.test.js | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/integrations/facebook-pixel/lib/index.js b/integrations/facebook-pixel/lib/index.js
index 2f8f19cff..da319459f 100644
--- a/integrations/facebook-pixel/lib/index.js
+++ b/integrations/facebook-pixel/lib/index.js
@@ -30,6 +30,7 @@ var FacebookPixel = (module.exports = integration('Facebook Pixel')
   .option('standardEventsCustomProperties', [])
   .option('keyForExternalId', '')
   .option('userIdAsExternalId', false)
+  .option('limitedDataUse', true)
   .mapping('standardEvents')
   .mapping('legacyEvents')
   .mapping('contentTypes')
@@ -102,6 +103,9 @@ FacebookPixel.prototype.initialize = function() {
   if (!this.options.automaticConfiguration) {
     window.fbq('set', 'autoConfig', false, this.options.pixelId);
   }
+  if (this.options.limitedDataUse) {
+    window.fbq('dataProcessingOptions', ['LDU'], 0, 0);
+  }
   if (this.options.initWithExistingTraits) {
     var traits = this.formatTraits(this.analytics);
     window.fbq('init', this.options.pixelId, traits);
diff --git a/integrations/facebook-pixel/test/index.test.js b/integrations/facebook-pixel/test/index.test.js
index 687f9a1e4..9a87574aa 100644
--- a/integrations/facebook-pixel/test/index.test.js
+++ b/integrations/facebook-pixel/test/index.test.js
@@ -35,6 +35,7 @@ describe('Facebook Pixel', function() {
     pixelId: '123123123',
     agent: 'test',
     initWithExistingTraits: false,
+    limitedDataUse: true,
     whitelistPiiProperties: [],
     blacklistPiiProperties: [],
     standardEventsCustomProperties: []
@@ -147,6 +148,12 @@ describe('Facebook Pixel', function() {
         );
       });
 
+      it('should call dataProcessingOptions if limitedDataUse is enabled', function() {
+        analytics.stub(window, 'fbq');
+        analytics.initialize();
+        analytics.called(window.fbq, 'dataProcessingOptions', ['LDU'], 0, 0);
+      });
+
       before(function() {
         options.initWithExistingTraits = true;
       });