- Rebased master

- Cleaned up import & moved it under Subscribers menu

lib/Models/SubscriberSegment.php

@@ -1,6 +1,8 @@
 <?php
 namespace MailPoet\Models;
 
+use MailPoet\Util\Helpers;
+
 if(!defined('ABSPATH')) exit;
 
 class SubscriberSegment extends Model {
@@ -9,4 +11,26 @@ class SubscriberSegment extends Model {
   function __construct() {
     parent::__construct();
   }
-}
+
+  static function createMultiple($segmnets, $subscribers) {
+    $values = Helpers::flattenArray(
+      array_map(function ($segment) use ($subscribers) {
+        return array_map(function ($subscriber) use ($segment) {
+          return array(
+            $segment,
+            $subscriber
+          );
+        }, $subscribers);
+      }, $segmnets)
+    );
+    return self::rawExecute(
+      'INSERT IGNORE INTO `' . self::$_table . '` ' .
+      '(segment_id, subscriber_id) ' .
+      'VALUES ' . rtrim(
+        str_repeat(
+          '(?, ?), ', count($subscribers) * count($segmnets)), ', '
+      ),
+      $values
+    );
+  }
+}