feat: add supports for http methods on rest setting

includes/abstract-integration.php

@@ -7,8 +7,6 @@ use WP_Error;
 use Exception;
 use TypeError;
 
-use function WPCT_HTTP\wpct_http_post;
-
 /**
  * Integration abstract class.
  *
@@ -196,9 +194,9 @@ abstract class Integration extends Singleton
             );
             $this->apply_pipes($hook['pipes'], $payload);
             $headers = $backend->get_headers();
-            if (isset($hook['endpoint'])) {
+            if (isset($hook['method'], $hook['endpoint'])) {
                 $url = $backend->get_endpoint_url($hook['endpoint']);
-                $res = wpct_http_post($url, [
+                $res = $this->submit_rest($hook['method'], $url, [
                     'data' => $payload,
                     'files' => $attachments,
                     'headers' => $headers,
@@ -350,6 +348,36 @@ abstract class Integration extends Singleton
         );
     }
 
+    /**
+     * Submit REST requests over HTTP methods.
+     *
+     * @since 3.0.4
+     *
+     * @param string $method HTTP method (GET, POST, PUT, DELETE).
+     * @param string $url Target URL.
+     * @param array $args Request arguments.
+     * @return array|WP_Error Request response.
+     */
+    private function submit_rest($method, $url, $args)
+    {
+        $m = strtolower($method);
+        $func = "\WPCT_HTTP\wpct_http_{$m}";
+        if (!is_callable($func)) {
+            return new WP_Error(
+                'http_method_not_allowed',
+                __("Unkown HTTP method: {$method}", 'wpct-erp-forms'),
+                ['status' => 405]
+            );
+        }
+
+        if (in_array($method, ['GET', 'DELETE'])) {
+            unset($args['headers']['Content-Type']);
+            $args['params'] = $args['data'];
+        }
+
+        return $func($url, $args);
+    }
+
     /**
      * JSON RPC login request.
      *

includes/class-settings.php

@@ -128,6 +128,10 @@ class Settings extends BaseSettings
                             'backend' => ['type' => 'string'],
                             'form_id' => ['type' => 'string'],
                             'endpoint' => ['type' => 'string'],
+                            'method' => [
+                                'type' => 'string',
+                                'enum' => ['GET', 'POST', 'PUT', 'DELETE'],
+                            ],
                             'pipes' => [
                                 'type' => 'array',
                                 'items' => [