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<?php

/**
 * Class to import archive
 *
 * Standard: PSR-2 (almost)
 * @link http://www.php-fig.org/psr/psr-2
 *
 * @package DUP_PRO
 * @subpackage classes/package
 * @copyright (c) 2017, Snapcreek LLC
 * @license https://opensource.org/licenses/GPL-3.0 GNU Public License
 *
 */

defined('ABSPATH') || defined('DUPXABSPATH') || exit;

use Duplicator\Libs\Snap\SnapIO;
use Duplicator\Libs\Snap\SnapJson;
use Duplicator\Addons\ProBase\License\License;
use Duplicator\Controllers\ImportPageController;
use Duplicator\Core\Views\TplMng;
use Duplicator\Installer\Core\Params\PrmMng;
use Duplicator\Libs\DupArchive\DupArchive;
use Duplicator\Libs\Snap\SnapWP;
use Duplicator\Utils\PHPExecCheck;

class DUP_PRO_Package_Importer
{
    const IMPORT_ENABLE_MIN_VERSION = '4.0.0'; // don't change this version on new realses
    const IMPORT_SUB_SITE_IN_MULTISITE_MIN_VERSION = '4.0.6'; // don't change this version on new realses
    const IMPORT_LITE_MAX_VERSION   = '2.0.0';

    /** @var string */
    protected $archive = null;
    /** @var string */
    protected $ext = null;
    /** @var bool */
    protected $isValid = false;
    /** @var string */
    protected $notValidMessage = '';
    /** @var object */
    protected $info = null;
    /** @var object */
    protected $scan = null;
    /**  @var string */
    protected $nameHash = null;
    /** @var string */
    protected $hash = null;
    /** @var bool */
    protected $isLite = false;
    /** @var string */
    protected $insPathType = ''; // duplicator, home, none

    /**
     *
     * @param string $path // valid archive patch
     * @throws Exception if file ins't valid
     */
    public function __construct($path)
    {
        if (!is_file($path)) {
            throw new Exception('Archive path "' . $path . '" is invalid');
        }

        SnapIO::chmod($path, 'u+rw');
        if (!is_readable($path)) {
            throw new Exception('Can\'t read the archive "' . $path . '"');
        }

        if (!preg_match(DUPLICATOR_PRO_ARCHIVE_REGEX_PATTERN, basename($path))) {
            throw new Exception('Invalid archive name "' . $path . '"');
        }

        $this->archive  = $path;
        $this->ext      = pathinfo($this->archive, PATHINFO_EXTENSION);
        $this->hash     = self::getHashFromArchiveName($this->archive);
        $this->nameHash = self::getNameHashFromArchiveName($this->archive);

        $this->initInfoObjects();
    }

    /**
     * Get file content from archive
     *
     * @param string $relativePath     relative path in archive
     * @param bool   $skipToDupFolder this flag optimizes the extraction of a file only for dup archives,
     *                                for ZIP archives it has no effect.
     *
     * @return string
     */
    protected function getFileContentFromArchive($relativePath, $skipToDupFolder = false)
    {
        switch ($this->ext) {
            case 'zip':
                if (!class_exists('ZipArchive', false)) {
                    throw new Exception(DUP_PRO_U::__('ZipArchive PHP module is not installed/enabled. The current package cannot be opened.'));
                }

                $zip = new ZipArchive();
                if ($zip->open($this->archive) !== true) {
                    throw new Exception('Can\'t open ZipArcive ' . $this->archive);
                }
                if (($fileContent = $zip->getFromName($relativePath)) === false) {
                    $zip->close();
                    throw new Exception('Can\'t get file ' . $relativePath . ' from archive ' . $this->archive);
                }
                $zip->close();
                break;
            case 'daf':
                $offset = ($skipToDupFolder ? DupArchive::getExtraOffset($this->archive) : 0);

                if (($fileContent = DupArchive::getSrcFile($this->archive, $relativePath, $offset)) === false) {
                    throw new Exception('Can\'t get file ' . $relativePath . ' from archive ' . $this->archive);
                }
                break;
            default:
                throw new Exception('Invalid archive extension "' . $this->ext . '"');
        }

        return $fileContent;
    }

    /**
     * This function extract a single file from archive in target file.
     *
     * @param string $file            file relative path
     * @param string $targetFile      target file full path
     * @param bool   $skipToDupFolder this flag optimizes the extraction of a file only for dup archives,
     *                                for ZIP archives it has no effect.
     *
     * @return string extracted file fullpath
     */
    protected function extractSingleFile($file, $targetFile, $skipToDupFolder = false)
    {
        $content = $this->getFileContentFromArchive($file, $skipToDupFolder);
        if (SnapIO::mkdirP(dirname($targetFile)) === false) {
            throw new Exception('Can\'t create file content folder ' . dirname($targetFile));
        }
        if (file_put_contents($targetFile, $content) === false) {
            throw new Exception('Can\'t create file ' . $targetFile);
        }
        return $targetFile;
    }

    /**
     * This function extract archive info package and read it, After initializing the information deletes the file.
     *
     * @return void
     */
    protected function initInfoObjects()
    {
        try {
            $this->info    = $this->getObjectFromJson('dup-installer/dup-archive__' . $this->hash . '.txt', true);
            $this->scan    = $this->getObjectFromJson('dup-installer/dup-scan__' . $this->hash . '.json', true);
            $this->isValid = true;
            if (isset($this->info->dup_type)) {
                $this->isLite = ($this->info->dup_type == 'lite');
            } else {
                $this->isLite = version_compare($this->getDupVersion(), self::IMPORT_LITE_MAX_VERSION, '<=');
            }
            if (!isset($this->info->installer_backup_name)) {
                $this->info->installer_backup_name = preg_replace(
                    '/^(.*)_archive\.(?:zip|daf)$/',
                    '$1_installer-backup.php',
                    $this->info->package_name,
                    1
                );
            }
        } catch (Exception $ex) {
            DUP_PRO_Log::trace("Couldn't initialize the info object: " . $ex->getMessage());
            $this->notValidMessage = $ex->getMessage();
            $this->isValid         = false;
        }
    }

    /**
     * Return json object
     *
     * @param string $relativePath     relative path in archive
     * @param bool   $skipToDupFolder this flag optimizes the extraction of a file only for dup archives,
     *                                for ZIP archives it has no effect.
     *
     * @return object The decoded json object
     */
    protected function getObjectFromJson($relativePath, $skipToDupFolder = false)
    {
        $json = $this->getFileContentFromArchive($relativePath, $skipToDupFolder);

        if (($result = json_decode($json)) === false) {
            throw new Exception('Can\'t decode scan json ' . $relativePath);
        }

        return $result;
    }

    /**
     * return admin installer page ling with right query string
     *
     * @return string
     */
    public function getInstallerPageLink()
    {
        if (is_multisite()) {
            $url = network_admin_url('admin.php');
        } else {
            $url = admin_url('admin.php');
        }

        $queryStr = http_build_query(array(
            'page'    => DUP_PRO_Constants::$IMPORT_INSTALLER_PAGE,
            'package' => $this->archive
        ));
        return $url . '?' . $queryStr;
    }

    /**
     * Return true if path have a import sub path
     *
     * @param string $path archive path
     *
     * @return boolean
     */
    public static function isImportPath($path)
    {
        return (preg_match('/[\/]' . preg_quote(DUPLICATOR_PRO_SSDIR_NAME, '/') . '[\/]' . preg_quote(DUPLICATOR_PRO_IMPORTS_DIR_NAME, '/') . '[\/]/', $path) === 1);
    }

    /**
     *
     * @param bool $removeArchive if true remove all or exclude archives
     *
     * @return bool
     */
    public static function cleanFolder($removeArchive = false)
    {
        if (!file_exists(DUPLICATOR_PRO_PATH_IMPORTS) && !wp_mkdir_p(DUPLICATOR_PRO_PATH_IMPORTS)) {
            throw new Exception('Can\'t create ' . DUPLICATOR_PRO_PATH_IMPORTS);
        }

        SnapIO::regexGlobCallback(DUPLICATOR_PRO_PATH_IMPORTS, array('\\Duplicator\\Libs\\Snap\\SnapIO', 'rrmdir'), array(
            'regexFile'   => ($removeArchive ? false : DUPLICATOR_PRO_ARCHIVE_REGEX_PATTERN),
            'regexFolder' => false,
            'invert'      => true,
        ));
        return true;
    }

    /**
     * Get error message if installer.php isn't executable
     *
     * @return string
     */
    protected static function getNotExecPhpErrorMessage()
    {
        return __(
            'Duplicator cannot launch Import because on this Server it isn\'t possible to execute PHP scripts in folders:',
            'duplicator-pro'
        ) . '<br>' .
            ' - ' . DUPLICATOR_PRO_PATH_IMPORTS . '<br>' .
            ' - ' . SnapWP::getHomePath();
    }

    /**
     * This function prepares the installer execution by extracting the installer-backup.php file and creating the overwrite parameter file
     *
     * @return string installer.php link with right params.
     *
     * @throws Exception
     */
    public function prepareToInstall()
    {
        $failMessage = '';
        static::cleanFolder();

        if ($this->determineInstallerFolder() == 'none') {
            throw new Exception(static::getNotExecPhpErrorMessage());
        }

        if (!$this->isImportable($failMessage)) {
            throw new Exception($failMessage);
        }

        if (!$this->isLite) {
            $this->createOverwriteParams();
        }

        $installerLink = $this->extractInstallerBackup();

        if ($this->isLite) {
            // if is Lite move archive on root folder
            $archiveFolder = SnapIO::safePathUntrailingslashit(dirname($this->archive));
            $installerFolder = SnapIO::safePathUntrailingslashit($this->getInstallerFolderPath());
            if ($archiveFolder != $installerFolder) {
                SnapIO::rename($this->archive, $installerFolder . '/' . basename($this->archive), true);
            }
        }

        return $installerLink;
    }

    /**
     * Determine possible path for installer.
     * If is none the installer can't be executed
     *
     * @return string can be duplicator, home, none
     */
    protected function determineInstallerFolder()
    {
        if (empty($this->insPathType)) {
            $this->insPathType = ($this->isLite() ? 'home' : 'duplicator');
            if ($this->insPathType == 'duplicator') {
                $path = DUPLICATOR_PRO_PATH_IMPORTS;
                $url  = DUPLICATOR_PRO_URL_IMPORTS;
                $phpCheck = new PHPExecCheck($path, $url);
                if ($phpCheck->check() == PHPExecCheck::PHP_OK) {
                    return $this->insPathType;
                }
            }

            /**
             * Home is always considered a valid path because in some cases (hsoting with slow hdd and some cache systems) 
             * the check returns a false negative
             */
            $this->insPathType = 'home';
            /*
            $path = SnapWP::getHomePath();
            $url  = get_home_url();
            $phpCheck = new PHPExecCheck($path, $url);
            if ($phpCheck->check() == PHPExecCheck::PHP_OK) {
                return $this->insPathType;
            }
            $this->insPathType = 'none'; 
            */
        }
        return $this->insPathType;
    }

    /**
     * Return installer folder path
     *
     * @return string|false false if impossibile exec the installer
     */
    protected function getInstallerFolderPath()
    {
        switch ($this->determineInstallerFolder()) {
            case 'duplicator':
                return DUPLICATOR_PRO_PATH_IMPORTS;
            case 'home':
                return SnapWP::getHomePath();
            case 'none':
                return false;
        }
    }

    /**
     * Return installer filder url
     *
     * @return string|false false if impossibile exec the installer
     */
    protected function getInstallerFolderUrl()
    {
        switch ($this->determineInstallerFolder()) {
            case 'duplicator':
                return DUPLICATOR_PRO_URL_IMPORTS;
            case 'home':
                return get_home_url();
            case 'none':
                return false;
        }
    }

    /**
     * Return installer name
     *
     * @return string
     */
    protected function getInstallerName()
    {
        $pathInfo = pathinfo($this->info->installer_backup_name);
        if (!isset($pathInfo['extension']) || $pathInfo['extension'] !== 'php') {
            return $pathInfo['filename'] . '.php';
        }
        return $this->info->installer_backup_name;
    }

    /**
     * Extract installer-backup.php file in import folder
     *
     * @return string // return installer import URL
     *
     * @throws Exception
     */
    protected function extractInstallerBackup()
    {
        if (($installerPath = $this->getInstallerFolderPath()) == false) {
            throw new Exception('Is impossibile exec the installer file');
        }

        $targetFile = $installerPath . '/' . $this->getInstallerName();
        $this->extractSingleFile($this->info->installer_backup_name, $targetFile);
        return $this->getInstallLink();
    }

    /**
     * Return installer link
     *
     * @return string
     */
    public function getInstallLink()
    {
        if ($this->isLite) {
            $queryStr = '';
        } else {
            $queryStr = '?' . http_build_query(array(
                'archive'    => $this->archive,
                'dup_folder' => 'dup-installer-' . $this->info->packInfo->secondaryHash
            ));
        }
        return $this->getInstallerFolderUrl() . '/' . $this->getInstallerName() . $queryStr;
    }

    /**
     * Return overwrite param for import
     *
     * @return array
     */
    protected function getOverwriteParams()
    {
        global $wpdb;
        global $wp_version;
        $globalEntity = \DUP_PRO_Global_Entity::get_instance();

        if (DUP_PRO_Package_Recover::getRecoverPackageId() !== false) {
            $recoverPackage     = DUP_PRO_Package_Recover::getRecoverPackage();
            $recoverLink        = $recoverPackage->getInstallLink();
            $packageIsOutToDate = $recoverPackage->isOutToDate();
            $packageLife        = $recoverPackage->getPackageLife();
        } else {
            $recoverLink        = '';
            $packageIsOutToDate = true;
            $packageLife        = -1;
        }

        $currentUser = wp_get_current_user();
        $updDirs     = wp_upload_dir();
        $params      = array(
            /* PrmMng::PARAM_DEBUG_PARAMS        => array(
              'value' => true
              ), */
            PrmMng::PARAM_TEMPLATE                    => array(
                'value' => 'import-base',
            ),
            PrmMng::PARAM_VALIDATION_ACTION_ON_START  => array(
                'value' => 'auto',
            ),
            PrmMng::PARAM_RECOVERY_LINK               => array(
                'value' => $recoverLink,
            ),
            PrmMng::PARAM_FROM_SITE_IMPORT_INFO       => array(
                'value' => array(
                    'import_page'             => ImportPageController::getImportPageLink(),
                    'recovery_page'           => DUP_PRO_CTRL_recovery::getRecoverPageLink(),
                    'recovery_is_out_to_date' => $packageIsOutToDate,
                    'recovery_package_life'   => $packageLife,
                    'color-scheme'            => DUP_PRO_UI_Screen::getCurrentColorScheme(),
                    'color-primary-button'    => DUP_PRO_UI_Screen::getPrimaryButtonColorByScheme()
                )
            ),
            PrmMng::PARAM_DB_DISPLAY_OVERWIRE_WARNING => array(
                'value' => false,
            ),
            PrmMng::PARAM_CPNL_CAN_SELECTED           => array(
                'value' => false,
            ),
            PrmMng::PARAM_DB_VIEW_MODE                => array(
                'value' => 'basic',
            ),
            PrmMng::PARAM_URL_NEW                     => array(
                'value'      => DUP_PRO_Archive::getOriginalUrls('home'),
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_PATH_NEW                    => array(
                'value'      => DUP_PRO_Archive::getOriginalPaths('home'),
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_ARCHIVE_ACTION              => array(),
            PrmMng::PARAM_ARCHIVE_ENGINE              => array(),
            PrmMng::PARAM_DB_ACTION                   => array(
                'value' => 'empty'
            ),
            PrmMng::PARAM_DB_HOST                     => array(
                'value'      => DB_HOST,
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_DB_NAME                     => array(
                'value'      => DB_NAME,
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_DB_USER                     => array(
                'value'      => DB_USER,
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_DB_PASS                     => array(
                'value'      => DB_PASSWORD,
                'formStatus' => 'st_infoonly'
            ),
            PrmMng::PARAM_DB_CHARSET                  => array(
                'value' => DB_CHARSET
            ),
            PrmMng::PARAM_DB_COLLATE                  => array(
                'value' => DB_COLLATE
            ),
            PrmMng::PARAM_OVERWRITE_SITE_DATA         => array(
                'value' => array(
                    'dupVersion'       => DUPLICATOR_PRO_VERSION,
                    'wpVersion'        => $wp_version,
                    'dupLicense'       => License::getType(),
                    'loggedUser'       => array(
                        'id'         => $currentUser->ID,
                        'user_login' => $currentUser->user_login
                    ),
                    'dbhost'           => DB_HOST,
                    'dbname'           => DB_NAME,
                    'dbuser'           => DB_USER,
                    'dbpass'           => DB_PASSWORD,
                    'table_prefix'      => $wpdb->base_prefix,
                    'restUrl'          => function_exists('get_rest_url') ? get_rest_url() : '',
                    'restNonce'        => wp_create_nonce('wp_rest'),
                    'restAuthUser'     => $globalEntity->basic_auth_enabled ? $globalEntity->basic_auth_user :  '',
                    'restAuthPassword' => $globalEntity->basic_auth_enabled ? DUP_PRO_Secure_Global_Entity::getInstance()->basic_auth_password : '',
                    'isMultisite'      => is_multisite(),
                    'subdomain'        => (defined('SUBDOMAIN_INSTALL') && SUBDOMAIN_INSTALL),
                    'subsites'         => DUP_PRO_MU::getSubsites(),
                    'nextSubsiteIdAI'  => SnapWP::getNextSubsiteIdAI(),
                    'adminUsers'       => DUP_PRO_WP_U::getAdminUserLists(),
                    'paths'            => DUP_PRO_Archive::getOriginalPaths(),
                    'urls'             => DUP_PRO_Archive::getOriginalUrls()
                )
            )
        );

        // if is manage hosting overwrite url and paths
        if (DUP_PRO_Custom_Host_Manager::getInstance()->isManaged()) {
            $urlPathParams = array(
                PrmMng::PARAM_SITE_URL           => array(
                    'value'      => site_url(),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_PATH_WP_CORE_NEW   => array(
                    'value'      => DUP_PRO_Archive::getOriginalPaths('abs'),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_URL_CONTENT_NEW    => array(
                    'value'      => content_url(),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_PATH_CONTENT_NEW   => array(
                    'value'      => DUP_PRO_Archive::getOriginalPaths('wpcontent'),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_URL_UPLOADS_NEW    => array(
                    'value'      => $updDirs['baseurl'],
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_PATH_UPLOADS_NEW   => array(
                    'value'      => DUP_PRO_Archive::getOriginalPaths('uploads'),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_URL_PLUGINS_NEW    => array(
                    'value'      => plugins_url(),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_PATH_PLUGINS_NEW   => array(
                    'value'      => DUP_PRO_Archive::getOriginalPaths('plugins'),
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_URL_MUPLUGINS_NEW  => array(
                    'value'      => WPMU_PLUGIN_URL,
                    'formStatus' => 'st_infoonly'
                ),
                PrmMng::PARAM_PATH_MUPLUGINS_NEW => array(
                    'value'      => DUP_PRO_Archive::getOriginalPaths('muplugins'),
                    'formStatus' => 'st_infoonly'
                )
            );

            $params = array_merge($params, $urlPathParams);
        }
        return $params;
    }

    /**
     * This function creates the parameter overwriting file
     *
     * @return boolean // return true on success
     *
     * @throws Exception if fail
     */
    protected function createOverwriteParams()
    {
        if (($installerPath = $this->getInstallerFolderPath()) == false) {
            throw new Exception('Is impossibile exec the installer file');
        }

        $overwriteFile = $installerPath . '/' . DUPLICATOR_PRO_LOCAL_OVERWRITE_PARAMS . '_' . $this->hash . '.json';

        $params = $this->getOverwriteParams();

        if (file_put_contents($overwriteFile, SnapJson::jsonEncodePPrint($params)) === false) {
            throw new Exception('Can\'t create overwrite param file');
        }

        return true;
    }

    /**
     * this function check if package is importable
     *
     * @param string $failMessage message if isn't importable
     *
     * @return boolean
     */
    public function isImportable(&$failMessage = null)
    {
        if (!$this->isValid) {
            $failMessage = DUP_PRO_U::__('The package information can\'t be read.') . "<br>\n";
            $failMessage .= sprintf(DUP_PRO_U::__('Error: %s'), $this->notValidMessage);

            if (!class_exists('ZipArchive', false)) {
                $failMessage .= sprintf(
                    _x(
                        'For more information see %1$s[this FAQ item]%2$s',
                        '%1$s and %2$s represents the opening and closing HTML tags for an anchor or link',
                        'duplicator-pro'
                    ),
                    '<a href="https://snapcreek.com/duplicator/docs/faqs-tech/#faq-trouble-060-q" target="_blank">',
                    '</a>'
                );
            }
            return false;
        }

        if ($this->isLite) {
            // if is lite skip all checks
            return true;
        }

        if (version_compare($this->getDupVersion(), self::IMPORT_ENABLE_MIN_VERSION, '<')) {
            $failMessage = sprintf(
                __(
                    'Package is incompatible or too old. Only packages created with Duplicator Pro v%s or higher can be imported.',
                    'duplicator-pro'
                ),
                self::IMPORT_ENABLE_MIN_VERSION
            );
            $failMessage .= '<br>';
            $failMessage .= sprintf(
                _x(
                    'If you want to install this package then please use the "classic installer.php" overwrite method %1$sexplained here%2$s.',
                    '%1$s and %2$s represents the opening and closing HTML tags for an anchor or link',
                    'duplicator-pro'
                ),
                '<a target="_blank" href="https://snapcreek.com/duplicator/docs/quick-start/#quick-040-q">',
                '</a>'
            );
            return false;
        }

        if (!$this->packageHasRequiredInstallerFiles()) {
            $failMessage = DUP_PRO_U::__('The package lacks some of the installer files.');
            return false;
        }

        $failMessage = '';
        return true;
    }

    /**
     * Check if package have a warning
     *
     * @param string $warnMessage
     *
     * @return bool
     */
    public function haveImportWaring(&$warnMessage = '')
    {
        if (is_multisite() && version_compare($this->getDupVersion(), self::IMPORT_SUB_SITE_IN_MULTISITE_MIN_VERSION, '<')) {
            $warnMessage = sprintf(
                __(
                    'This package is importable but the installation type "import subsite in multisite" isn\'t available ' .
                    'because it was created with a version of Duplicator prior to %s',
                    'duplicator-pro'
                ),
                self::IMPORT_SUB_SITE_IN_MULTISITE_MIN_VERSION
            );
            $warnMessage .= '<br>';
            $warnMessage .= sprintf(
                __(
                    'To use this type of installation use a package created with version %s +',
                    'duplicator-pro'
                ),
                self::IMPORT_SUB_SITE_IN_MULTISITE_MIN_VERSION
            );
            return true;
        }

        return false;
    }

    /**
     * Check if paths list is in zip archive
     *
     * @param string[] $paths paths list
     *
     * @return bool
     */
    protected function packageZipRequiredPathsCheck($paths)
    {
        if (!class_exists('ZipArchive', false)) {
            throw new Exception(DUP_PRO_U::__('ZipArchive PHP module is not installed/enabled. The current package cannot be opened.'));
        }

        $zip = new ZipArchive();
        if ($zip->open($this->archive) !== true) {
            throw new Exception('Can\'t open ZipArcive ' . $this->archive);
        }

        for ($i = 0; $i < count($paths); $i++) {
            if ($zip->locateName($paths[$i]) === false) {
                break;
            }
        }
        $zip->close();
        return ($i >= count($paths));
    }

    /**
     * Check if paths list is in zip archive
     *
     * @param string[] $paths           paths list
     * @param bool     $skipToDupFolder if true and if there is the position in the archive,
     *                                  the scan jumps directly to the position of the dup folder,
     *                                  otherwise the scan starts from the beginning.
     *
     * @return bool
     */
    protected function packageDupRequiredPathsCheck($paths, $skipToDupFolder = false)
    {
        $offset = ($skipToDupFolder ? DupArchive::getExtraOffset($this->archive) : 0);

        if (($handle = SnapIO::fopen($this->archive, 'r')) === false) {
            throw new Exception('Can\'t open DupArchive ' . $this->archive);
        }

        for ($i = 0; $i < count($paths); $i++) {
            if (DupArchive::searchPath($handle, $paths[$i], $offset) === false) {
                break;
            }
        }

        SnapIO::fclose($handle);
        return ($i >= count($paths));
    }

    /**
     * Return true if package har required installer files
     *
     * @return bool
     */
    protected function packageHasRequiredInstallerFiles()
    {
        $check = false;

        try {
            if (!$this->isValid) {
                throw new Exception("Can't do this check on an invalid package.");
            }

            $requiredFilePaths = array(
                $this->info->installer_backup_name,
                'dup-installer/main.installer.php',
            );

            switch ($this->ext) {
                case 'zip':
                    $check = $this->packageZipRequiredPathsCheck($requiredFilePaths);
                    break;
                case 'daf':
                    // It's possibile skip directly to the extra files because the files to be checked
                    // are at the end of the archive. Due to a performance issue you don't need to check files that require scanning the archive from the beginning.
                    $check = $this->packageDupRequiredPathsCheck($requiredFilePaths, true);
                    break;
                default:
                    throw new Exception('Invalid archive extension "' . $this->ext . '"');
            }
        } catch (Exception $ex) {
            DUP_PRO_Log::trace($ex->getMessage());
            throw $ex;
        }

        return $check;
    }

    /**
     * true if package is valid
     *
     * @return bool
     */
    public function isValid()
    {
        return $this->isValid;
    }

    /**
     * return archive full path
     *
     * @return string
     */
    public function getFullPath()
    {
        return $this->archive;
    }

    /**
     * return archive name
     *
     * @return string
     */
    public function getName()
    {
        return basename($this->archive);
    }

    /**
     *
     * @return string
     */
    public function getPackageId()
    {
        if (!$this->isValid) {
            return 0;
        }
        return $this->info->packInfo->packageId;
    }

    /**
     *
     * @return string
     */
    public function getPackageName()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->packInfo->packageName;
    }

    /**
     * return package creation date
     *
     * @return string
     */
    public function getCreated()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->created;
    }

    /**
     * return archive size
     *
     * @return int
     */
    public function getSize()
    {
        return filesize($this->archive);
    }

    /**
     * return package version
     *
     * @return string
     */
    public function getDupVersion()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->version_dup;
    }

    /**
     * return source site wordpress version
     *
     * @return string
     */
    public function getWPVersion()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->version_wp;
    }

    /**
     * return source site PHP version
     *
     * @return string
     */
    public function getPhpVersion()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->version_php;
    }

    /**
     * return source site home url
     *
     * @return string
     */
    public function getHomeUrl()
    {
        if (!$this->isValid) {
            return '';
        }
        if ($this->isLite()) {
            return $this->info->url_old;
        } else {
            return $this->info->wpInfo->configs->realValues->homeUrl;
        }
    }

    /**
     * return source site home path
     *
     * @return string
     */
    public function getHomePath()
    {
        if (!$this->isValid) {
            return '';
        }

        if ($this->isLite()) {
            return $this->info->wproot;
        } else {
            return $this->info->wpInfo->configs->realValues->originalPaths->home;
        }
    }

    /**
     * return source site abs path
     *
     * @return string
     */
    public function getAbsPath()
    {
        if (!$this->isValid) {
            return '';
        }
        return $this->info->wpInfo->configs->realValues->archivePaths->abs;
    }

    /**
     * return package num folders
     *
     * @return int
     */
    public function getNumFolders()
    {
        if (!$this->isValid) {
            return 0;
        }
        return $this->info->fileInfo->dirCount;
    }

    /**
     * return package num files
     *
     * @return int
     */
    public function getNumFiles()
    {
        if (!$this->isValid) {
            return 0;
        }
        return $this->info->fileInfo->fileCount;
    }

    /**
     * return package database size
     *
     * @return int
     */
    public function getDbSize()
    {
        if (!$this->isValid) {
            return 0;
        }
        if ($this->isLite()) {
            return $this->info->dbInfo->tablesSizeOnDisk;
        } else {
            return DUP_PRO_U::byteSize($this->info->dbInfo->tablesSizeOnDisk);
        }
    }

    /**
     * return package num tables
     *
     * @return int
     */
    public function getNumTables()
    {
        if (!$this->isValid) {
            return 0;
        }
        return $this->info->dbInfo->tablesFinalCount;
    }

    /**
     * return package num rows
     *
     * @return int
     */
    public function getNumRows()
    {
        if (!$this->isValid) {
            return 0;
        }
        return (int) $this->info->dbInfo->tablesRowCount;
    }

    /**
     * thing function generate html package details
     *
     * @param bool $echo
     *
     * @return string|void
     */
    public function getHtmlDetails($echo = true)
    {
        return TplMng::getInstance()->render(
            'admin_pages/import/import-package-details',
            array(
                'importObj' => $this
            ),
            $echo
        );
    }

    /**
     * get the list folder to check package to import
     *
     * @return string[]
     */
    protected static function getFoldersToCheck()
    {
        $result = array();
        if (is_readable(DUPLICATOR_PRO_PATH_IMPORTS) && is_dir(DUPLICATOR_PRO_PATH_IMPORTS)) {
            $result[] = DUPLICATOR_PRO_PATH_IMPORTS;
        }

        $home = duplicator_pro_get_home_path();
        if (is_readable($home) && is_dir($home)) {
            $result[] = $home;
        }

        $customPath = DUP_PRO_Global_Entity::get_instance()->import_custom_path;
        if (strlen($customPath) > 0 && is_dir($customPath) && is_readable($customPath)) {
            $result[] = $customPath;
        }

        return $result;
    }

    /**
     * get list of all packages avaibale to import sorted by filetime
     *
     * @return string[]
     */
    public static function getArchiveList()
    {
        $archivesList = array();
        foreach (self::getFoldersToCheck() as $folder) {
            $archivesList = array_merge($archivesList, SnapIO::regexGlob($folder, array(
                'regexFile'   => DUPLICATOR_PRO_ARCHIVE_REGEX_PATTERN,
                'regexFolder' => false
            )));
        }

        $fileNames = array();
        $result    = array();

        // unique archive name in list
        foreach ($archivesList as $arhivePath) {
            $archiveName = basename($arhivePath);
            if (in_array($archiveName, $fileNames)) {
                continue;
            }

            $fileNames[] = $archiveName;
            $result[]    = $arhivePath;
        }
        usort($result, array(__CLASS__, 'archiveListSort'));
        return $result;
    }

    /**
     *
     * @param string $a // path
     * @param string $b // path
     * @return int
     */
    public static function archiveListSort($a, $b)
    {
        $timeA = 0;
        $timeB = 0;

        if (file_exists($a)) {
            $timeA = filemtime($a);
        }


        if (file_exists($b)) {
            $timeB = filemtime($b);
        }

        if ($timeA === $timeB) {
            return 0;
        } elseif ($timeA > $timeB) {
            return -1;
        } else {
            return 1;
        }
    }

    /**
     * get import objects of all packages avaibles to import
     *
     * @return \DUP_PRO_Package_Importer[]
     */
    public static function getArchiveObjects()
    {
        $objects = array();
        foreach (DUP_PRO_Package_Importer::getArchiveList() as $archivePath) {
            try {
                $objects[] = new DUP_PRO_Package_Importer($archivePath);
            } catch (Exception $e) {
                DUP_PRO_Log::traceObject('Can\'t read package and continue', $e);
            }
        }

        return $objects;
    }

    /**
     * Get package hash from archive file name
     *
     * @param $path archive file name
     * @return package hash
     */
    public static function getHashFromArchiveName($path)
    {
        return preg_replace('/^.+_([a-z0-9]{7})[a-z0-9]+_[0-9]{6}([0-9]{8})_archive\.(?:zip|daf)$/', '$1-$2', basename($path));
    }

    /**
     * get package name hash from archive file name
     *
     * @param string $path
     * @return string
     */
    public static function getNameHashFromArchiveName($path)
    {
        return preg_replace('/^(.+_[a-z0-9]{7}[a-z0-9]+_[0-9]{6}[0-9]{8})_archive\.(?:zip|daf)$/', '$1', basename($path));
    }

    /**
     * true f current package is from Duplicator LITE
     *
     * @return bool
     */
    public function isLite()
    {
        return $this->isLite;
    }

    /**
     * Purge old imports
     *
     * @return void
     */
    public static function purgeOldImports()
    {
        if (!file_exists(DUPLICATOR_PRO_PATH_IMPORTS)) {
            return;
        }

        if (($files = scandir(DUPLICATOR_PRO_PATH_IMPORTS)) == false) {
            DUP_PRO_LOG::trace("Couldn't get list of files in " . DUPLICATOR_PRO_PATH_IMPORTS);
            return;
        }

        foreach ($files as $file) {
            $filepath = DUPLICATOR_PRO_PATH_IMPORTS . "/{$file}";
            DUP_PRO_LOG::trace("checking {$filepath}");
            if (is_file($filepath)) {
                if (filemtime($filepath) <= time() - DUP_PRO_Constants::IMPORTS_CLEANUP_SECS) {
                    @unlink($filepath);
                }
            }
        }
    }
}

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