<?php

namespace Tenweb_Manager {

  class Migration
  {
    const MIGRATION_DB_FILE_NAME     = "10web_migration_db.sql";
    const MIGRATION_CONFIG_FILE_NAME = "10web_migration_config.json";
    const MIGRATION_ARCHIVE          = "10web_migration";
    protected $wpdb;
    /**
     * Migration constructor.
     *
     */
    public function __construct()
    {
      global $wpdb;
      $this->wpdb = $wpdb;

    }
    /**
	 * @return string
	*/
	public static function getMigrationArchive()
	{
	  // we need zlib to use gzencode function
	  if (extension_loaded('zlib')) {
      return self::MIGRATION_ARCHIVE.'.tar.gz';
	  } else {
      return self::MIGRATION_ARCHIVE.'.zip';
    }
	}

    /**
     * @return string
     */
    public static function get_tmp_dir()
    {
        $sys_tmp_dir = sys_get_temp_dir();
        if (!TENWEB_MIGRATION_DEBUG && is_dir($sys_tmp_dir)) {
            $tmp_dir = $sys_tmp_dir . "/10web_tmp";

        } else{
            $tmp_dir = self::get_uploads_dir() . "/10web_tmp";
        }


        if (!is_dir($tmp_dir)) {
          mkdir($tmp_dir);
        }

        return $tmp_dir;
    }

    /**
     * @param $delete_db_options
     *
     * function for removing  files, if something goes wrong
     */
    public static function role_back($delete_db_options = true)
    {
      self::recursive_remove_dir(self::get_tmp_dir());
      if($delete_db_options === true){
          self::role_back_db();
      }
    }

    public static function role_back_db()
    {
        delete_site_transient('tenweb_subdomain');
        delete_site_transient('tenweb_migrate_live');
        delete_site_transient('tenweb_migrate_domain_id');
        delete_site_transient('tenweb_migrate_region');
        delete_site_transient('tenweb_tp_domain_name');
    }

    public static function get_uploads_dir()
    {
      $uploads_dir = wp_upload_dir();
      return $uploads_dir["basedir"];
    }

    public static function recursive_remove_dir($dir) {
      if (is_dir($dir)) {
          $objects = scandir($dir);
          foreach ($objects as $object) {
              if ($object != "." && $object != "..") {
                  if (is_dir($dir."/".$object))
                      rmdir($dir."/".$object);
                  else
                      unlink($dir."/".$object);
              }
          }
          rmdir($dir);
      }
    }

  }
}