Add default setting for matomo_disable_cookies

app/views/layouts/_matomo.html.haml

 <!-- Matomo -->
-- matomo_disable_cookies = extra_config.has_key?('matomo_disable_cookies') && extra_config.matomo_disable_cookies
 = javascript_tag do
   :plain
     var _paq = window._paq = window._paq || [];
     _paq.push(['trackPageView']);
     _paq.push(['enableLinkTracking']);
-    #{matomo_disable_cookies ? '_paq.push(["disableCookies"])' : ""};
+    #{extra_config.matomo_disable_cookies ? '_paq.push(["disableCookies"])' : ""};
     (function() {
       var u="//#{extra_config.matomo_url}/";
       _paq.push(['setTrackerUrl', u+'matomo.php']);

config/initializers/1_settings.rb

@@ -819,6 +819,7 @@ Settings.forti_token_cloud['enabled'] = false if Settings.forti_token_cloud['ena
 Settings['extra'] ||= Settingslogic.new({})
 Settings.extra['matomo_site_id'] ||= Settings.extra['piwik_site_id'] if Settings.extra['piwik_site_id'].present?
 Settings.extra['matomo_url'] ||= Settings.extra['piwik_url'] if Settings.extra['piwik_url'].present?
+Settings.extra['matomo_disable_cookies'] = false if Settings.extra['matomo_disable_cookies'].nil?
 
 #
 # Rack::Attack settings

spec/views/layouts/_head.html.haml_spec.rb

@@ -92,7 +92,8 @@ RSpec.describe 'layouts/_head' do
     before do
       stub_config(extra: {
                     matomo_url: matomo_host,
-                    matomo_site_id: 12345
+                    matomo_site_id: 12345,
+                    matomo_disable_cookies: false
                   })
     end
 
@@ -101,10 +102,10 @@ RSpec.describe 'layouts/_head' do
 
       expect(rendered).to match(/<script.*>.*var u="\/\/#{matomo_host}\/".*<\/script>/m)
       expect(rendered).to match(%r(<noscript>.*<img src="//#{matomo_host}/matomo.php.*</noscript>))
+      expect(rendered).not_to include('_paq.push(["disableCookies"])')
     end
 
-    context 'matomo_disable_cookies' do
-      context 'when true' do
+    context 'when matomo_disable_cookies is true' do
       before do
         stub_config(extra: { matomo_url: matomo_host, matomo_site_id: 12345, matomo_disable_cookies: true })
       end
@@ -115,31 +116,6 @@ RSpec.describe 'layouts/_head' do
         expect(rendered).to include('_paq.push(["disableCookies"])')
       end
     end
-
-      context 'when false' do
-        before do
-          stub_config(extra: { matomo_url: matomo_host, matomo_site_id: 12345, matomo_disable_cookies: false })
-        end
-
-        it 'does not disable cookies' do
-          render
-
-          expect(rendered).not_to include('_paq.push(["disableCookies"])')
-        end
-      end
-
-      context 'when absent' do
-        before do
-          stub_config(extra: { matomo_url: matomo_host, matomo_site_id: 12345 })
-        end
-
-        it 'does not disable cookies' do
-          render
-
-          expect(rendered).not_to include('_paq.push(["disableCookies"])')
-        end
-      end
-    end
   end
 
   def stub_helper_with_safe_string(method)