Add sending service key validation [MAILPOET-743]

lib/API/Endpoints/Services.php

@@ -0,0 +1,57 @@
+<?php
+namespace MailPoet\API\Endpoints;
+
+use Carbon\Carbon;
+use MailPoet\API\Endpoint as APIEndpoint;
+use MailPoet\API\Error as APIError;
+use MailPoet\Services\Bridge;
+
+if(!defined('ABSPATH')) exit;
+
+class Services extends APIEndpoint {
+  function verifyMailPoetKey($data = array()) {
+    $key = isset($data['key']) ? trim($data['key']) : null;
+
+    if(!$key) {
+      return $this->badRequest(array(
+        APIError::BAD_REQUEST  => __('You need to specify a key.', 'mailpoet')
+      ));
+    }
+
+    try {
+      $bridge = new Bridge($key);
+      $result = $bridge->checkKey();
+    } catch(\Exception $e) {
+      return $this->errorResponse(array(
+        $e->getCode() => $e->getMessage()
+      ));
+    }
+
+    $code = !empty($result['code']) ? (int)$result['code'] : null;
+
+    if($code == Bridge::MAILPOET_KEY_VALID) {
+      return $this->successResponse(null);
+    }
+
+    switch($code) {
+      case Bridge::MAILPOET_KEY_INVALID:
+        $error = __('Your MailPoet key is invalid!', 'mailpoet');
+        break;
+      case Bridge::MAILPOET_KEY_EXPIRING:
+        $error = sprintf(
+          __('Your MailPoet key is expiring on %s!', 'mailpoet'),
+          Carbon::createFromTimestamp(strtotime($result['data']['expire_at']))
+            ->format('Y-m-d')
+        );
+        break;
+      default:
+        $error = sprintf(
+          __('Error validating API key, please try again later (code: %s)', 'mailpoet'),
+          $code
+        );
+        break;
+    }
+
+    return $this->errorResponse(array(APIError::BAD_REQUEST => $error));
+  }
+}