Encapsulate date formatting within the DateTime class [PREMIUM-4]

lib/API/Endpoints/v1/Services.php

@@ -1,7 +1,6 @@
 <?php
 namespace MailPoet\API\Endpoints\v1;
 
-use Carbon\Carbon;
 use MailPoet\API\Endpoint as APIEndpoint;
 use MailPoet\API\Error as APIError;
 use MailPoet\Services\Bridge;
@@ -44,8 +43,7 @@ class Services extends APIEndpoint {
     } elseif($state == Bridge::MAILPOET_KEY_EXPIRING) {
       $success_message = sprintf(
         __('Your MailPoet key expires on %s!', 'mailpoet'),
-        Carbon::createFromTimestamp(strtotime($result['data']['expire_at']))
-          ->format($this->date_time->getDateFormat())
+        $this->date_time->formatDate(strtotime($result['data']['expire_at']))
       );
     }
 
@@ -94,8 +92,7 @@ class Services extends APIEndpoint {
     } elseif($state == Bridge::PREMIUM_KEY_EXPIRING) {
       $success_message = sprintf(
         __('Your license key expires on %s.', 'mailpoet'),
-        Carbon::createFromTimestamp(strtotime($result['data']['expire_at']))
-          ->format($this->date_time->getDateFormat())
+        $this->date_time->formatDate(strtotime($result['data']['expire_at']))
       );
     }
 

lib/Config/ServicesChecker.php

@@ -36,7 +36,7 @@ class ServicesChecker {
     ) {
       if($display_error_notice) {
         $date_time = new DateTime();
-        $date = date($date_time->getDateFormat(), strtotime($mss_key['data']['expire_at']));
+        $date = $date_time->formatDate(strtotime($mss_key['data']['expire_at']));
         $error = Helpers::replaceLinkTags(
           __('Your newsletters are awesome! Don\'t forget to [link]upgrade your MailPoet email plan[/link] by %s to keep sending them to your subscribers.', 'mailpoet'),
           'https://account.mailpoet.com?s=' . Subscriber::getTotalSubscribers()
@@ -77,7 +77,7 @@ class ServicesChecker {
     ) {
       if($display_error_notice) {
         $date_time = new DateTime();
-        $date = date($date_time->getDateFormat(), strtotime($premium_key['data']['expire_at']));
+        $date = $date_time->formatDate(strtotime($premium_key['data']['expire_at']));
         $error = Helpers::replaceLinkTags(
           __('Your License Key is expiring! Don\'t forget to [link]renew your license[/link] by %s to keep enjoying automatic updates and Premium support.', 'mailpoet'),
           'https://account.mailpoet.com'

lib/WP/DateTime.php

@@ -38,6 +38,12 @@ class DateTime {
     return date($format, $timestamp);
   }
 
+  function formatDate($timestamp, $format=false) {
+    if (empty($format)) $format = $this->getDateFormat();
+
+    return date($format, $timestamp);
+  }
+
   /**
    * Generates a list of time strings within an interval,
    * formatted and mapped from DEFAULT_TIME_FORMAT to WordPress time strings.

tests/unit/WP/DateTimeTest.php

@@ -42,9 +42,17 @@ class DateTimeTest extends MailPoetTest {
   function testFormatTime() {
     $timestamp = 1234567;
     $format = "H:i:s";
+    expect($this->date_time->formatTime($timestamp))->equals(date($this->date_time->getTimeFormat(), $timestamp));
     expect($this->date_time->formatTime($timestamp, $format))->equals(date($format, $timestamp));
   }
 
+  function testFormatDate() {
+    $timestamp = 1234567;
+    $format = "Y-m-d";
+    expect($this->date_time->formatDate($timestamp))->equals(date($this->date_time->getDateFormat(), $timestamp));
+    expect($this->date_time->formatDate($timestamp, $format))->equals(date($format, $timestamp));
+  }
+
   function testTimeInterval() {
     $one_hour_interval = array_keys($this->date_time->getTimeInterval(
       '00:00:00',