Add public keyword to methods

[MAILPOET-2413]

lib/Statistics/Track/Clicks.php

@@ -31,7 +31,7 @@ class Clicks {
   /**
    * @param \stdClass|null $data
    */
-  function track($data) {
+  public function track($data) {
     if (!$data || empty($data->link)) {
       return $this->abort();
     }
@@ -90,7 +90,7 @@ class Clicks {
     }
   }
 
-  function processUrl($url, $newsletter, $subscriber, $queue, $wp_user_preview) {
+  public function processUrl($url, $newsletter, $subscriber, $queue, $wp_user_preview) {
     if (preg_match('/\[link:(?P<action>.*?)\]/', $url, $shortcode)) {
       if (!$shortcode['action']) $this->abort();
       $url = Link::processShortcodeAction(
@@ -107,13 +107,13 @@ class Clicks {
     return $url;
   }
 
-  function abort() {
+  public function abort() {
     WPFunctions::get()->statusHeader(404);
     WPFunctions::get()->getTemplatePart((string)404);
     exit;
   }
 
-  function redirectToUrl($url) {
+  public function redirectToUrl($url) {
     header('Location: ' . $url, true, 302);
     exit;
   }

lib/Statistics/Track/Opens.php

@@ -5,7 +5,7 @@ namespace MailPoet\Statistics\Track;
 use MailPoet\Models\StatisticsOpens;
 
 class Opens {
-  function track($data, $display_image = true) {
+  public function track($data, $display_image = true) {
     if (!$data) {
       return $this->returnResponse($display_image);
     }
@@ -25,7 +25,7 @@ class Opens {
     return $this->returnResponse($display_image);
   }
 
-  function returnResponse($display_image) {
+  public function returnResponse($display_image) {
     if (!$display_image) return;
     // return 1x1 pixel transparent gif image
     header('Content-Type: image/gif');

lib/Statistics/Track/Unsubscribes.php

@@ -5,7 +5,7 @@ namespace MailPoet\Statistics\Track;
 use MailPoet\Models\StatisticsUnsubscribes;
 
 class Unsubscribes {
-  function track($newsletter_id, $subscriber_id, $queue_id) {
+  public function track($newsletter_id, $subscriber_id, $queue_id) {
     $statistics = StatisticsUnsubscribes::where('subscriber_id', $subscriber_id)
       ->where('newsletter_id', $newsletter_id)
       ->where('queue_id', $queue_id)

lib/Statistics/Track/WooCommercePurchases.php

@@ -18,12 +18,12 @@ class WooCommercePurchases {
   /** @var Cookies */
   private $cookies;
 
-  function __construct(Helper $woocommerce_helper, Cookies $cookies) {
+  public function __construct(Helper $woocommerce_helper, Cookies $cookies) {
     $this->woocommerce_helper = $woocommerce_helper;
     $this->cookies = $cookies;
   }
 
-  function trackPurchase($id, $use_cookies = true) {
+  public function trackPurchase($id, $use_cookies = true) {
     $order = $this->woocommerce_helper->wcGetOrder($id);
     if (!$order instanceof WC_Order) {
       return;