decode query params (#590)

* decode query params

* Add unit test

* bump version

Author: danieljackins

integrations/segmentio/lib/utm.js

@@ -17,7 +17,7 @@ function utm(query) {
       if (utmParam === 'campaign') {
         utmParam = 'name'
       }
-      acc[utmParam] = v
+      acc[utmParam] = decodeURIComponent(v.replace(/\+/g, ' '))
     }
   }
 

integrations/segmentio/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@segment/analytics.js-integration-segmentio",
   "description": "The Segmentio analytics.js integration.",
-  "version": "4.4.4",
+  "version": "4.4.5",
   "keywords": [
     "analytics.js",
     "analytics.js-integration",

integrations/segmentio/test/index.test.js

@@ -241,6 +241,18 @@ describe('Segment.io', function() {
         Segment.global = window;
       });
 
+      it('should decode .campaign', function() {
+        Segment.global = { navigator: {}, location: {} };
+        Segment.global.location.search =
+          '?utm_source=%5BFoo%5D';
+        segment.normalize(object);
+        analytics.assert(object);
+        analytics.assert(object.context);
+        analytics.assert(object.context.campaign);
+        analytics.assert(object.context.campaign.source === '[Foo]');
+        Segment.global = window;
+      });
+
       it('should allow override of .campaign', function() {
         Segment.global = { navigator: {}, location: {} };
         Segment.global.location.search =