remove list fetcher component entirely - prefer server-side flow

Author: dannyvankooten

assets/src/js/admin.js

@@ -2,7 +2,6 @@
 const tabs = require('./admin/tabs.js')
 const settings = require('./admin/settings.js')
 
-require('./admin/list-fetcher.js')
 require('./admin/fields/mailchimp-api-key.js')
 require('./admin/list-overview.js')
 require('./admin/show-if.js')

assets/src/js/admin/list-fetcher.js

@@ -22,26 +22,9 @@ public function __construct(MC4WP_Admin_Tools $tools)
      */
     public function add_hooks()
     {
-        add_action('wp_ajax_mc4wp_renew_mailchimp_lists', [ $this, 'refresh_mailchimp_lists' ]);
         add_action('wp_ajax_mc4wp_get_list_details', [ $this, 'get_list_details' ]);
     }
 
-    /**
-     * Empty lists cache & fetch lists again.
-     */
-    public function refresh_mailchimp_lists()
-    {
-        if (! $this->tools->is_user_authorized()) {
-            wp_send_json_error();
-            return;
-        }
-
-        check_ajax_referer('mc4wp-ajax');
-
-        $mailchimp = new MC4WP_MailChimp();
-        $success   = $mailchimp->refresh_lists();
-        wp_send_json($success);
-    }
 
     /**
      * Retrieve details (merge fields and interest categories) for one or multiple lists in Mailchimp

includes/admin/class-admin-ajax.php

@@ -2,8 +2,9 @@
 <p><?php echo esc_html__('The table below shows your Mailchimp audiences and their details. If you just applied changes to your Mailchimp account, please use the following button to renew the cache.', 'mailchimp-for-wp'); ?></p>
 
 <div id="mc4wp-list-fetcher">
-    <form method="post">
+    <form method="post" action="">
         <input type="hidden" name="_mc4wp_action" value="empty_lists_cache" />
+        <?php echo wp_nonce_field('_mc4wp_action'); ?>
         <p>
             <input type="submit" value="<?php echo esc_attr__('Renew Mailchimp audiences', 'mailchimp-for-wp'); ?>" class="button">
         </p>