<?php

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/**

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* @package Freemius

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* @copyright Copyright (c) 2015, Freemius, Inc.

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* @license https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3

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* @author Leo Fajardo (@leorw)

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* @since 2.5.0

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*/

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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/**

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* Manages the detection of clones and provides the logged-in WordPress user with options for manually resolving them.

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*

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* @since 2.5.0

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*

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* @property int $clone_identification_timestamp

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* @property int $temporary_duplicate_mode_selection_timestamp

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* @property int $temporary_duplicate_notice_shown_timestamp

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* @property string $request_handler_id

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* @property int $request_handler_timestamp

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* @property int $request_handler_retries_count

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* @property bool $hide_manual_resolution

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* @property array $new_blog_install_map

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*/

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class FS_Clone_Manager {

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/**

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* @var FS_Option_Manager

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*/

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private $_storage;

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/**

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* @var FS_Option_Manager

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*/

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private $_network_storage;

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/**

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* @var FS_Admin_Notices

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*/

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private $_notices;

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/**

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* @var FS_Logger

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*/

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protected $_logger;

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/**

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* @var int 3 minutes

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*/

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const CLONE_RESOLUTION_MAX_EXECUTION_TIME = 180;

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/**

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* @var int

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*/

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const CLONE_RESOLUTION_MAX_RETRIES = 3;

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/**

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* @var int

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*/

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const TEMPORARY_DUPLICATE_PERIOD = WP_FS__TIME_WEEK_IN_SEC * 2;

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/**

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* @var string

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*/

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const OPTION_NAME = 'clone_resolution';

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/**

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* @var string

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*/

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const OPTION_MANAGER_NAME = 'clone_management';

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/**

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* @var string

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*/

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const OPTION_TEMPORARY_DUPLICATE = 'temporary_duplicate';

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/**

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* @var string

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*/

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const OPTION_LONG_TERM_DUPLICATE = 'long_term_duplicate';

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/**

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* @var string

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*/

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const OPTION_NEW_HOME = 'new_home';

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#--------------------------------------------------------------------------------

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#region Singleton

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#--------------------------------------------------------------------------------

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/**

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* @var FS_Clone_Manager

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*/

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private static $_instance;

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/**

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* @return FS_Clone_Manager

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*/

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static function instance() {

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if ( ! isset( self::$_instance ) ) {

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self::$_instance = new self();

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}

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return self::$_instance;

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}

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#endregion

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private function __construct() {

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$this->_storage = FS_Option_Manager::get_manager( WP_FS___OPTION_PREFIX . self::OPTION_MANAGER_NAME, true );

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$this->_network_storage = FS_Option_Manager::get_manager( WP_FS___OPTION_PREFIX . self::OPTION_MANAGER_NAME, true, true );

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$this->maybe_migrate_options();

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$this->_notices = FS_Admin_Notices::instance( 'global_clone_resolution_notices', '', '', true );

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$this->_logger = FS_Logger::get_logger( WP_FS__SLUG . '_' . '_clone_manager', WP_FS__DEBUG_SDK, WP_FS__ECHO_DEBUG_SDK );

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}

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/**

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* Migrate clone resolution options from 2.5.0 array-based structure, to a new flat structure.

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*

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* The reason this logic is not in a separate migration script is that we want to be 100% sure data is migrated before any execution of clone logic.

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*

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* @todo Delete this one in the future.

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*/

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private function maybe_migrate_options() {

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$storages = array(

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$this->_storage,

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$this->_network_storage

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);

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foreach ( $storages as $storage ) {

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$clone_data = $storage->get_option( self::OPTION_NAME );

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if ( is_array( $clone_data ) && ! empty( $clone_data ) ) {

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foreach ( $clone_data as $key => $val ) {

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if ( ! is_null( $val ) ) {

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$storage->set_option( $key, $val );

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}

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}

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$storage->unset_option( self::OPTION_NAME, true );

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}

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}

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}

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/**

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* @author Leo Fajardo (@leorw)

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* @since 2.5.0

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*/

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function _init() {

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if ( is_admin() ) {

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if ( Freemius::is_admin_post() ) {

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add_action( 'admin_post_fs_clone_resolution', array( $this, '_handle_clone_resolution' ) );

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}

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if ( Freemius::is_ajax() ) {

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Freemius::add_ajax_action_static( 'handle_clone_resolution', array( $this, '_clone_resolution_action_ajax_handler' ) );

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} else {

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if (

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empty( $this->get_clone_identification_timestamp() ) &&

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(

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! fs_is_network_admin() ||

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! ( $this->is_clone_resolution_options_notice_shown() || $this->is_temporary_duplicate_notice_shown() )

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)

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) {

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$this->hide_clone_admin_notices();

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} else if ( ! Freemius::is_cron() && ! Freemius::is_admin_post() ) {

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$this->try_resolve_clone_automatically();

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$this->maybe_show_clone_admin_notice();

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add_action( 'admin_footer', array( $this, '_add_clone_resolution_javascript' ) );

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}

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}

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}

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}

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/**

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* Retrieves the timestamp that was stored when a clone was identified.

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*

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* @return int|null

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*/

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function get_clone_identification_timestamp() {

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return $this->get_option( 'clone_identification_timestamp', true );

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}

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/**

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* @author Leo Fajardo (@leorw)

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* @since 2.5.1

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*

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* @param string $sdk_last_version

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*/

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function maybe_update_clone_resolution_support_flag( $sdk_last_version ) {

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if ( null !== $this->hide_manual_resolution ) {

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return;

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}

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$this->hide_manual_resolution = (

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! empty( $sdk_last_version ) &&

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version_compare( $sdk_last_version, '2.5.0', '<' )

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);

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}

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/**

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* Stores the time when a clone was identified.

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*/

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function store_clone_identification_timestamp() {

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$this->clone_identification_timestamp = time();

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}

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/**

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* Retrieves the timestamp for the temporary duplicate mode's expiration.

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*

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* @return int

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*/

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function get_temporary_duplicate_expiration_timestamp() {

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$temporary_duplicate_mode_start_timestamp = $this->was_temporary_duplicate_mode_selected() ?

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$this->temporary_duplicate_mode_selection_timestamp :

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$this->get_clone_identification_timestamp();

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return ( $temporary_duplicate_mode_start_timestamp + self::TEMPORARY_DUPLICATE_PERIOD );

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}

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/**

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* Determines if the SDK should handle clones. The SDK handles clones only up to 3 times with 3 min interval.

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*

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* @return bool

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*/

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private function should_handle_clones() {

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if ( ! isset( $this->request_handler_timestamp ) ) {

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return true;

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}

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if ( $this->request_handler_retries_count >= self::CLONE_RESOLUTION_MAX_RETRIES ) {

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return false;

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}

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// Give the logic that handles clones enough time to finish (it is given 3 minutes for now).

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return ( time() > ( $this->request_handler_timestamp + self::CLONE_RESOLUTION_MAX_EXECUTION_TIME ) );

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}

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/**

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* @author Leo Fajardo (@leorw)

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* @since 2.5.1

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*

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* @return bool

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*/

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function should_hide_manual_resolution() {

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return ( true === $this->hide_manual_resolution );

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}

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/**

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* Executes the clones handler logic if it should be executed, i.e., based on the return value of the should_handle_clones() method.

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*

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* @author Leo Fajardo (@leorw)

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* @since 2.5.0

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*/

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function maybe_run_clone_resolution() {

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if ( ! $this->should_handle_clones() ) {

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return;

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}

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$this->request_handler_retries_count = isset( $this->request_handler_retries_count ) ?

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( $this->request_handler_retries_count + 1 ) :

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1;

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$this->request_handler_timestamp = time();

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$handler_id = ( rand() . microtime() );

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$this->request_handler_id = $handler_id;

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// Add cookies to trigger request with the same user access permissions.

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$cookies = array();

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foreach ( $_COOKIE as $name => $value ) {

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$cookies[] = new WP_Http_Cookie( array(

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'name' => $name,

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'value' => $value,

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) );

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}

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wp_remote_post(

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admin_url( 'admin-post.php' ),

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array(

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'method' => 'POST',

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'body' => array(

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'action' => 'fs_clone_resolution',

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'handler_id' => $handler_id,

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),

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'timeout' => 0.01,

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'blocking' => false,

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'sslverify' => false,

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'cookies' => $cookies,

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)

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);

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}

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/**

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* Executes the clones handler logic.

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*

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* @author Leo Fajardo (@leorw)

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* @since 2.5.0

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*/

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function _handle_clone_resolution() {

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$handler_id = fs_request_get( 'handler_id' );

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if ( empty( $handler_id ) ) {

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return;

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}

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if (

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! isset( $this->request_handler_id ) ||

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$this->request_handler_id !== $handler_id

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) {

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return;

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}

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if ( ! $this->try_automatic_resolution() ) {

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$this->clear_temporary_duplicate_notice_shown_timestamp();

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}

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}

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#--------------------------------------------------------------------------------

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#region Automatic Clone Resolution

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#--------------------------------------------------------------------------------

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/**

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* @var array All installs cache.

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*/

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private $all_installs;

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/**

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* Checks if a given instance's install is a clone of another subsite in the network.

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*

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* @author Vova Feldman (@svovaf)

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*

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* @return FS_Site

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*/

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private function find_network_subsite_clone_install( Freemius $instance ) {

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if ( ! is_multisite() ) {

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// Not a multi-site network.

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return null;

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}

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if ( ! isset( $this->all_installs ) ) {

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$this->all_installs = Freemius::get_all_modules_sites();

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}

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// Check if there's another blog that has the same site.

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$module_type = $instance->get_module_type();

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$sites_by_module_type = ! empty( $this->all_installs[ $module_type ] ) ?

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$this->all_installs[ $module_type ] :

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array();

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$slug = $instance->get_slug();

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$sites_by_slug = ! empty( $sites_by_module_type[ $slug ] ) ?

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$sites_by_module_type[ $slug ] :

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array();

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$current_blog_id = get_current_blog_id();

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$current_install = $instance->get_site();

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foreach ( $sites_by_slug as $site ) {

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if (

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$current_install->id == $site->id &&

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$current_blog_id != $site->blog_id

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) {

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// Clone is identical to an install on another subsite in the network.

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return $site;

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}

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}

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return null;

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}

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/**

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* Tries to find a different install of the context product that is associated with the current URL and loads it.

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*

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* @author Leo Fajardo (@leorw)

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* @since 2.5.0

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*

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* @param Freemius $instance

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* @param string $url

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*

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* @return object

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*/

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private function find_other_install_by_url( Freemius $instance, $url ) {

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$result = $instance->get_api_user_scope()->get( "/plugins/{$instance->get_id()}/installs.json?url=" . urlencode( $url ) . "&all=true", true );

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$current_install = $instance->get_site();

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if ( $instance->is_api_result_object( $result, 'installs' ) ) {

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foreach ( $result->installs as $install ) {

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if ( $install->id == $current_install->id ) {

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continue;

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}

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if (

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$instance->is_only_premium() &&

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! FS_Plugin_License::is_valid_id( $install->license_id )

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) {

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continue;

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}

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// When searching for installs by a URL, the API will first strip any paths and search for any matching installs by the subdomain. Therefore, we need to test if there's a match between the current URL and the install's URL before continuing.

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if ( $url !== fs_strip_url_protocol( untrailingslashit( $install->url ) ) ) {

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continue;

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}

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// Found a different install that is associated with the current URL, load it and replace the current install with it if no updated install is found.

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return $install;

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}

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}

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return null;

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}

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/**

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* Delete the current install associated with a given instance and opt-in/activate-license to create a fresh install.

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*

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* @author Vova Feldman (@svovaf)

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* @since 2.5.0

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*

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* @param Freemius $instance

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* @param string|false $license_key

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*

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* @return bool TRUE if successfully connected. FALSE if failed and had to restore install from backup.

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*/

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private function delete_install_and_connect( Freemius $instance, $license_key = false ) {

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$user = Freemius::_get_user_by_id( $instance->get_site()->user_id );

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$instance->delete_current_install( true );

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if ( ! is_object( $user ) ) {

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// Get logged-in WordPress user.

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$current_user = Freemius::_get_current_wp_user();

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// Find the relevant FS user by email address.

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$user = Freemius::_get_user_by_email( $current_user->user_email );

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}

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if ( is_object( $user ) ) {

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// When a clone is found, we prefer to use the same user of the original install for the opt-in.

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$instance->install_with_user( $user, $license_key, false, false );

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} else {

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// If no user is found, activate with the license.

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$instance->opt_in(

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false,

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false,

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false,

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$license_key

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);

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}

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if ( is_object( $instance->get_site() ) ) {

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// Install successfully created.

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return true;

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}

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// Restore from backup.

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$instance->restore_backup_site();

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return false;

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}

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/**

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* Try to resolve the clone situation automatically.

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*

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* @param Freemius $instance

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* @param string $current_url

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* @param bool $is_localhost

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* @param bool|null $is_clone_of_network_subsite

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*

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* @return bool If managed to automatically resolve the clone.

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*/

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private function try_resolve_clone_automatically_by_instance(

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Freemius $instance,

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$current_url,

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$is_localhost,

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$is_clone_of_network_subsite = null

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) {

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// Try to find a different install of the context product that is associated with the current URL.

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$associated_install = $this->find_other_install_by_url( $instance, $current_url );

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if ( is_object( $associated_install ) ) {

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// Replace the current install with a different install that is associated with the current URL.

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$instance->store_site( new FS_Site( clone $associated_install ) );

[477] Fix | Delete

$instance->sync_install( array( 'is_new_site' => true ), true );

[478] Fix | Delete

[479] Fix | Delete

return true;

[480] Fix | Delete

}

[481] Fix | Delete

[482] Fix | Delete

if ( ! $instance->is_premium() ) {

[483] Fix | Delete

// For free products, opt-in with the context user to create new install.

[484] Fix | Delete

return $this->delete_install_and_connect( $instance );

[485] Fix | Delete

}

[486] Fix | Delete

[487] Fix | Delete

$license = $instance->_get_license();

[488] Fix | Delete

$can_activate_license = ( is_object( $license ) && ! $license->is_utilized( $is_localhost ) );

[489] Fix | Delete

[490] Fix | Delete

if ( ! $can_activate_license ) {

[491] Fix | Delete

// License can't be activated, therefore, can't be automatically resolved.

[492] Fix | Delete

return false;

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

if ( ! WP_FS__IS_LOCALHOST_FOR_SERVER && ! $is_localhost ) {

[496] Fix | Delete

$is_clone_of_network_subsite = ( ! is_null( $is_clone_of_network_subsite ) ) ?

[497] Fix | Delete

$is_clone_of_network_subsite :

[498] Fix | Delete

is_object( $this->find_network_subsite_clone_install( $instance ) );

[499] Fix | Delete