EZP-26828: Trigger crowdin in-context translation based on a cookie

If an ez_in_context_translation cookie is set with any value, the request's accept-language
is set, using an event subscriber, to ach-UG, the pseudo-locale used by crowdin.

When the locale is ach-UG, the javascript that adds the in-context overlay is loaded.

EventListener/CrowdinRequestLocaleSubcriber.php

@@ -0,0 +1,31 @@
+<?php
+/**
+ * @copyright Copyright (C) eZ Systems AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+namespace EzSystems\PlatformUIBundle\EventListener;
+
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+class CrowdinRequestLocaleSubcriber implements EventSubscriberInterface
+{
+    public static function getSubscribedEvents()
+    {
+        return [
+            KernelEvents::REQUEST => [
+                ['setInContextAcceptLanguage', 100],
+            ],
+        ];
+    }
+
+    public function setInContextAcceptLanguage(GetResponseEvent $e)
+    {
+        if (!$e->getRequest()->cookies->has('ez_in_context_translation')) {
+            return;
+        }
+
+        $e->getRequest()->headers->set('accept-language', 'ach-UG');
+    }
+}

Resources/config/services.yml

@@ -291,3 +291,8 @@ services:
             calls:
                 - [setRequestStack, ['@request_stack']]
                 - [setPjaxRequestMatcher, ['@ezsystems.platformui.pjax.request_matcher']]
+
+    ezsystems.platformui.event_subscriber.crowdin_request_locale:
+        class: EzSystems\PlatformUIBundle\EventListener\CrowdinRequestLocaleSubcriber
+        tags:
+            - {name: kernel.event_subscriber}

Resources/views/PlatformUI/shell.html.twig

@@ -5,6 +5,14 @@
     <title>eZ Platform UI</title>
     <meta name="viewport" content="width=device-width"/>
     <meta charset="utf-8"/>
+
+    {% if parameters.interfaceLanguages[0] == 'ach_UG' %}
+        <script type="text/javascript">
+            var _jipt = [];
+            _jipt.push(['project', 'ez-platform']);
+        </script>
+        <script type="text/javascript" src="//cdn.crowdin.com/jipt/jipt.js"></script>
+    {% endif %}
 {% stylesheets '$css.files;ez_platformui$' filter='cssrewrite' %}
     <link rel="stylesheet" href="{{ asset_url }}"/>
 {% endstylesheets %}