Merge pull request #2340 from alphagov/msw/accept-di-cookie-consent

Accept cookie consent from Digital Identity query parameter

CHANGELOG.md

@@ -11,6 +11,7 @@
 
 * Increase size of action link blue arrow ([PR #2343](https://github.com/alphagov/govuk_publishing_components/pull/2343))
 * Remove scroll tracking on pages ([PR #2339](https://github.com/alphagov/govuk_publishing_components/pull/2339))
+* Accept cookie consent from Digital Identity query parameter ([PR #2340](https://github.com/alphagov/govuk_publishing_components/pull/2340))
 
 ## 27.4.0
 

app/assets/javascripts/govuk_publishing_components/analytics/init.js

@@ -8,6 +8,25 @@ var analyticsInit = function () {
     var linkedDomains = window.GOVUK.analyticsVars.linkedDomains || false
   }
 
+  window.GOVUK.Analytics.checkDigitalIdentityConsent = function (location) {
+    if (!location || !location.search) return
+    // this checks for the presence of the Digital Identity cookie consent query parameter and updates our consent cookie accordingly
+    // This is so that users don't see multiple cookie banners when they move between the different account management pages, as some will be on GOV.UK and others will be on the DI domain.
+    var digitalIdentityConsent = /([?&]cookie_consent=)(accept|reject)/.exec(location.search)
+    if (digitalIdentityConsent) {
+      if (digitalIdentityConsent[2] === 'accept') {
+        window.GOVUK.setConsentCookie({ usage: true })
+        // set cookies_preferences_set to true to prevent cookie banner showing
+        window.GOVUK.cookie('cookies_preferences_set', 'true')
+      } else if (digitalIdentityConsent[2] === 'reject') {
+        window.GOVUK.setConsentCookie({ usage: false })
+        window.GOVUK.cookie('cookies_preferences_set', 'true')
+      }
+    }
+  }
+
+  window.GOVUK.Analytics.checkDigitalIdentityConsent(window.location)
+
   var consentCookie = window.GOVUK.getConsentCookie()
   var dummyAnalytics = {
     addLinkedTrackerDomain: function () {},

spec/javascripts/govuk_publishing_components/analytics/analytics.spec.js

@@ -43,6 +43,32 @@ describe('GOVUK.Analytics', function () {
       expect(universalSetupArguments[1]).toEqual(['set', 'anonymizeIp', true])
       expect(universalSetupArguments[2]).toEqual(['set', 'allowAdFeatures', false])
     })
+
+    it('sets usage consent cookie to false when cookie_consent query string parameter has a value of "reject"', function () {
+      var location = {
+        protocol: 'https:',
+        hostname: 'site.example.com',
+        href: 'https://site.example.com/a/path?cookie_consent=reject',
+        search: '?cookie_consent=reject',
+        origin: 'https://site.example.com'
+      }
+      GOVUK.Analytics.checkDigitalIdentityConsent(location)
+      expect(GOVUK.getCookie('cookies_preferences_set')).toBe('true')
+      expect(GOVUK.getConsentCookie().usage).toBe(false)
+    })
+
+    it('sets usage consent cookie to true when cookie_consent query string parameter has a value of "accept"', function () {
+      var location = {
+        protocol: 'https:',
+        hostname: 'site.example.com',
+        href: 'https://site.example.com/a/path?cookie_consent=accept',
+        search: '?cookie_consent=accept',
+        origin: 'https://site.example.com'
+      }
+      GOVUK.Analytics.checkDigitalIdentityConsent(location)
+      expect(GOVUK.getCookie('cookies_preferences_set')).toBe('true')
+      expect(GOVUK.getConsentCookie().usage).toBe(true)
+    })
   })
 
   describe('extracting the default path for a page view', function () {