add_action('wp_ajax_kalrav_upload_file', 'kalrav_upload_file');
add_action('wp_ajax_nopriv_kalrav_upload_file', 'kalrav_upload_file');  

function kalrav_upload_file()
{
    // Path to your plugin uploads folder
    $upload_dir = plugin_dir_path(__FILE__) . 'uploads/';

    if (!file_exists($upload_dir)) {
        mkdir($upload_dir, 0755, true);
    }

    if (!empty($_FILES['file']['name'])) { 
        $file_name = time() . '-' . basename($_FILES['file']['name']);  
        $target_path = $upload_dir . $file_name;

        if (move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) { 
            wp_send_json_success([
                'message' => 'File uploaded successfully!',
                'file_path' => $target_path,
                'url' => plugins_url('uploads/' . $file_name, __FILE__)  
            ]);
        } else {
            wp_send_json_error(['message' => 'Failed to move uploaded file.']);
        }
    } else {
        wp_send_json_error(['message' => 'No file uploaded.']);
    }

    wp_die();
}