Convert 'display_revenues' setting to feature flag

[MAILPOET-2008]

lib/API/JSON/v1/Newsletters.php

@@ -8,6 +8,7 @@ use MailPoet\API\JSON\Error as APIError;
 use MailPoet\Config\AccessControl;
 use MailPoet\Cron\CronHelper;
 use MailPoet\Cron\Workers\SendingQueue\Tasks\Newsletter as NewsletterQueueTask;
+use MailPoet\Features\FeaturesController;
 use MailPoet\Listing;
 use MailPoet\Models\Newsletter;
 use MailPoet\Models\NewsletterOption;
@@ -43,6 +44,9 @@ class Newsletters extends APIEndpoint {
   /** @var SettingsController */
   private $settings;
 
+  /** @var FeaturesController */
+  private $features_controller;
+
   public $permissions = array(
     'global' => AccessControl::PERMISSION_MANAGE_EMAILS
   );
@@ -52,13 +56,15 @@ class Newsletters extends APIEndpoint {
     Listing\Handler $listing_handler,
     WPFunctions $wp,
     WCHelper $woocommerce_helper,
-    SettingsController $settings
+    SettingsController $settings,
+    FeaturesController $features_controller
   ) {
     $this->bulk_action = $bulk_action;
     $this->listing_handler = $listing_handler;
     $this->wp = $wp;
     $this->woocommerce_helper = $woocommerce_helper;
     $this->settings = $settings;
+    $this->features_controller = $features_controller;
   }
 
   function get($data = array()) {
@@ -443,13 +449,13 @@ class Newsletters extends APIEndpoint {
         $newsletter
           ->withSegments(true)
           ->withSendingQueue()
-          ->withStatistics($this->woocommerce_helper);
+          ->withStatistics($this->woocommerce_helper, $this->features_controller);
       } else if ($newsletter->type === Newsletter::TYPE_WELCOME || $newsletter->type === Newsletter::TYPE_AUTOMATIC) {
         $newsletter
           ->withOptions()
           ->withTotalSent()
           ->withScheduledToBeSent()
-          ->withStatistics($this->woocommerce_helper);
+          ->withStatistics($this->woocommerce_helper, $this->features_controller);
       } else if ($newsletter->type === Newsletter::TYPE_NOTIFICATION) {
         $newsletter
           ->withOptions()
@@ -459,7 +465,7 @@ class Newsletters extends APIEndpoint {
         $newsletter
           ->withSegments(true)
           ->withSendingQueue()
-          ->withStatistics($this->woocommerce_helper);
+          ->withStatistics($this->woocommerce_helper, $this->features_controller);
       }
 
       if ($newsletter->status === Newsletter::STATUS_SENT ||