Let the statisticsForms model return the total signups instead of the form model

- added unit test for getTotalSignups() method

lib/Models/Form.php

@@ -39,11 +39,6 @@ class Form extends Model {
     return parent::save();
   }
 
-  function withSignups() {
-    $this->signups = StatisticsForms::where('form_id', $this->id)->count();
-    return $this;
-  }
-
   static function search($orm, $search = '') {
     return $orm->whereLike('name', '%'.$search.'%');
   }

lib/Models/StatisticsForms.php

@@ -6,6 +6,10 @@ if(!defined('ABSPATH')) exit;
 class StatisticsForms extends Model {
   public static $_table = MP_STATISTICS_FORMS_TABLE;
 
+  public static function getTotalSignups($form_id = false) {
+    return self::where('form_id', $form_id)->count();
+  }
+
   public static function record($form_id, $subscriber_id) {
     if($form_id > 0 && $subscriber_id > 0) {
       // check if we already have a record for today

lib/Router/Forms.php

@@ -1,6 +1,7 @@
 <?php
 namespace MailPoet\Router;
 use \MailPoet\Models\Form;
+use \MailPoet\Models\StatisticsForms;
 use \MailPoet\Form\Renderer as FormRenderer;
 use \MailPoet\Listing;
 use \MailPoet\Form\Util;
@@ -29,9 +30,9 @@ class Forms {
 
     // fetch segments relations for each returned item
     foreach($listing_data['items'] as $key => $form) {
-      $form = $form
+      $form = $form->asArray();
-        ->withSignups()
+
-        ->asArray();
+      $form['signups'] = StatisticsForms::getTotalSignups($form['id']);
 
       $form['segments'] = (
         !empty($form['settings']['segments'])

tests/unit/Models/StatisticsFormsTest.php

@@ -36,6 +36,20 @@ class StatisticsFormsTest extends MailPoetTest {
     expect($record)->false();
   }
 
+  function testItCanReturnTheTotalSignupsOfAForm() {
+    // simulate 2 signups for form #1
+    StatisticsForms::record($form_id = 1, $subscriber_id = 2);
+    StatisticsForms::record($form_id = 1, $subscriber_id = 1);
+    // simulate 1 signup for form #2
+    StatisticsForms::record($form_id = 2, $subscriber_id = 2);
+
+    $form_1_signups = StatisticsForms::getTotalSignups($form_id = 1);
+    expect($form_1_signups)->equals(2);
+
+    $form_2_signups = StatisticsForms::getTotalSignups($form_id = 2);
+    expect($form_2_signups)->equals(1);
+  }
+
   function _after() {
     StatisticsForms::deleteMany();
   }