Adds intval filter and fixes issue with number format applied on IDs

>=1000

lib/Config/Renderer.php

@@ -31,6 +31,7 @@ class Renderer {
     $this->setupDebug();
     $this->setupTranslations();
     $this->setupFunctions();
+    $this->setupFilters();
     $this->setupHandlebars();
     $this->setupHelpscout();
     $this->setupGlobalVariables();
@@ -45,6 +46,10 @@ class Renderer {
     $this->renderer->addExtension(new Twig\Functions());
   }
 
+  function setupFilters() {
+    $this->renderer->addExtension(new Twig\Filters());
+  }
+
   function setupHandlebars() {
     $this->renderer->addExtension(new Twig\Handlebars());
   }

lib/Twig/Filters.php

@@ -0,0 +1,20 @@
+<?php
+namespace MailPoet\Twig;
+
+if(!defined('ABSPATH')) exit;
+
+class Filters extends \Twig_Extension {
+
+  function getName() {
+    return 'filters';
+  }
+
+  function getFilters() {
+    return array(
+      new \Twig_SimpleFilter(
+        'intval',
+        'intval'
+      ),
+    );
+  }
+}

views/newsletter/editor.html

@@ -1193,7 +1193,7 @@
         validateUnsubscribeLinkPresent: true, // TODO: Add validation based on whether Mailpoet MTA is used or not
       },
       urls: {
-        send: '<%= admin_url('admin.php?page=mailpoet-newsletters#/send/' ~ (params('id') | number_format)) %>',
+        send: '<%= admin_url('admin.php?page=mailpoet-newsletters#/send/' ~ (params('id') | intval)) %>',
         imageMissing: '<%= image_url(
           "newsletter_editor/image-missing.svg"
         ) %>',
@@ -1204,7 +1204,7 @@
       endpoint: 'newsletters',
       action: 'get',
       data: {
-        id: "<%= params('id') | number_format %>",
+        id: "<%= params('id') | intval %>",
       }
     }).always(function() {
       MailPoet.Modal.loading(false);