Move plugin files to a subfolder

[MAILPOET-3988]

mailpoet/lib/API/JSON/Endpoint.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace MailPoet\API\JSON;
+
+use MailPoet\Config\AccessControl;
+use MailPoet\WP\Functions as WPFunctions;
+
+abstract class Endpoint {
+  const TYPE_POST = 'POST';
+  const TYPE_GET = 'GET';
+
+  public $permissions = [
+    'global' => AccessControl::PERMISSION_MANAGE_SETTINGS,
+    'methods' => [],
+  ];
+
+  protected static $getMethods = [];
+
+  public function successResponse(
+    $data = [], $meta = [], $status = Response::STATUS_OK
+  ) {
+    return new SuccessResponse($data, $meta, $status);
+  }
+
+  public function errorResponse(
+    $errors = [], $meta = [], $status = Response::STATUS_NOT_FOUND
+  ) {
+    if (empty($errors)) {
+      $errors = [
+        Error::UNKNOWN => WPFunctions::get()->__('An unknown error occurred.', 'mailpoet'),
+      ];
+    }
+    return new ErrorResponse($errors, $meta, $status);
+  }
+
+  public function badRequest($errors = [], $meta = []) {
+    if (empty($errors)) {
+      $errors = [
+        Error::BAD_REQUEST => WPFunctions::get()->__('Invalid request parameters', 'mailpoet'),
+      ];
+    }
+    return new ErrorResponse($errors, $meta, Response::STATUS_BAD_REQUEST);
+  }
+
+  public function isMethodAllowed($name, $type) {
+    // Block GET requests on POST endpoints, but allow POST requests on GET endpoints (some plugins
+    // change REQUEST_METHOD to POST on GET requests, which caused them to be blocked)
+    if ($type === self::TYPE_GET && !in_array($name, static::$getMethods)) {
+      return false;
+    }
+    return true;
+  }
+}