Viên ngọc phương Đông

<?php

/**
 * Class DownloadLogHandler.
 */
class BackWpup_Download_Handler
{
    /**
     * Nonce.
     *
     * @var string The nonce to verify
     */
    private $nonce_action;

/**
     * Capability.
     *
     * @var string The capability needed to download the file
     */
    private $capability;

/**
     * Action.
     *
     * @var string The action to perform
     */
    private $action;

/**
     * Downloader.
     *
     * @var \BackWPup_Download_File_Interface The instance used to download the file
     */
    private $downloader;

/**
     * DownloadLogHandler constructor.
     *
     * @param \BackWPup_Download_File_Interface $downloader   the instance used to download the file
     * @param string                            $nonce_action the nonce to verify
     * @param string                            $capability   the capability needed to download the file
     * @param string                            $action       the action to perform
     */
    public function __construct(BackWPup_Download_File_Interface $downloader, $nonce_action, $capability, $action)
    {
        $this->downloader = $downloader;
        $this->nonce_action = $nonce_action;
        $this->capability = $capability;
        $this->action = $action;
    }

/**
     * Handle the Request.
     */
    public function handle()
    {
        if (!$this->verify_request()) {
            return;
        }

$this->downloader->download();
    }

/**
     * Verify Request.
     *
     * @return bool True if verified, false otherwise. Die if nonce is not valid
     */
    private function verify_request()
    {
        // phpcs:ignore
        if (!isset($_GET['action']) || $this->action !== filter_var($_GET['action'])) {
            return false;
        }

check_admin_referer($this->nonce_action, $this->nonce_action);

if (!current_user_can($this->capability)) {
            wp_die('Cheating Uh?');
        }

return true;
    }
}