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<?php

/**
 * The plugin activation class.
 *
 * @since      	1.1.0
 * @since  		1.5 Moved into /inc
 * @package    	LiteSpeed
 * @subpackage 	LiteSpeed/inc
 * @author     	LiteSpeed Technologies <info@litespeedtech.com>
 */

namespace LiteSpeed;

defined('WPINC') || exit();

class Activation extends Base
{
	const TYPE_UPGRADE = 'upgrade';
	const TYPE_INSTALL_3RD = 'install_3rd';
	const TYPE_INSTALL_ZIP = 'install_zip';
	const TYPE_DISMISS_RECOMMENDED = 'dismiss_recommended';

const NETWORK_TRANSIENT_COUNT = 'lscwp_network_count';

private static $_data_file;

/**
	 * Construct
	 *
	 * @since 4.1
	 */
	public function __construct()
	{
		self::$_data_file = LSCWP_CONTENT_DIR . '/' . self::CONF_FILE;
	}

/**
	 * The activation hook callback.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public static function register_activation()
	{
		global $wp_version;
		$advanced_cache = LSCWP_CONTENT_DIR . '/advanced-cache.php';
		if (version_compare($wp_version, '5.3', '<') && !file_exists($advanced_cache)) {
			$file_pointer = fopen($advanced_cache, 'w');
			fwrite($file_pointer, "<?php\n\n// A compatibility placeholder for WordPress < v5.3\n// Created by LSCWP v6.1+");
			fclose($file_pointer);
		}

$count = 0;
		!defined('LSCWP_LOG_TAG') && define('LSCWP_LOG_TAG', 'Activate_' . get_current_blog_id());

if (is_multisite()) {
			$count = self::get_network_count();
			if ($count !== false) {
				$count = intval($count) + 1;
				set_site_transient(self::NETWORK_TRANSIENT_COUNT, $count, DAY_IN_SECONDS);
			}
		}

// Files will be delayed updated in next visit to wp-admin
		Conf::update_option('__activation', Core::VER);

/* Network file handler */
		if (is_multisite()) {
			if (!is_network_admin()) {
				if ($count === 1) {
					// Only itself is activated, set .htaccess with only CacheLookUp
					try {
						Htaccess::cls()->insert_ls_wrapper();
					} catch (\Exception $ex) {
						Admin_Display::error($ex->getMessage());
					}
				}
			}
		}

if (defined('LSCWP_REF') && LSCWP_REF == 'whm') {
			GUI::update_option(GUI::WHM_MSG, GUI::WHM_MSG_VAL);
		}
	}

/**
	 * Uninstall plugin
	 * @since 1.1.0
	 */
	public static function uninstall_litespeed_cache()
	{
		Task::destroy();

// Delete options
		foreach (Conf::cls()->load_default_vals() as $k => $v) {
			Base::delete_option($k);
		}

// Delete site options
		if (is_multisite()) {
			foreach (Conf::cls()->load_default_site_vals() as $k => $v) {
				Base::delete_site_option($k);
			}
		}

// Delete avatar table
		Data::cls()->tables_del();

if (file_exists(LITESPEED_STATIC_DIR)) {
			File::rrmdir(LITESPEED_STATIC_DIR);
		}

Cloud::version_check('uninstall');

// Files has been deleted when deactivated
	}

/**
	 * Get the blog ids for the network. Accepts function arguments.
	 *
	 * Will use wp_get_sites for WP versions less than 4.6
	 *
	 * @since 1.0.12
	 * @access public
	 * @return array The array of blog ids.
	 */
	public static function get_network_ids($args = array())
	{
		global $wp_version;
		if (version_compare($wp_version, '4.6', '<')) {
			$blogs = wp_get_sites($args);
			if (!empty($blogs)) {
				foreach ($blogs as $key => $blog) {
					$blogs[$key] = $blog['blog_id'];
				}
			}
		} else {
			$args['fields'] = 'ids';
			$blogs = get_sites($args);
		}
		return $blogs;
	}

/**
	 * Gets the count of active litespeed cache plugins on multisite.
	 *
	 * @since 1.0.12
	 * @access private
	 */
	private static function get_network_count()
	{
		$count = get_site_transient(self::NETWORK_TRANSIENT_COUNT);
		if ($count !== false) {
			return intval($count);
		}
		// need to update
		$default = array();
		$count = 0;

$sites = self::get_network_ids(array('deleted' => 0));
		if (empty($sites)) {
			return false;
		}

foreach ($sites as $site) {
			$bid = is_object($site) && property_exists($site, 'blog_id') ? $site->blog_id : $site;
			$plugins = get_blog_option($bid, 'active_plugins', $default);
			if (in_array(LSCWP_BASENAME, $plugins, true)) {
				$count++;
			}
		}

/**
		 * In case this is called outside the admin page
		 * @see  https://codex.wordpress.org/Function_Reference/is_plugin_active_for_network
		 * @since  2.0
		 */
		if (!function_exists('is_plugin_active_for_network')) {
			require_once ABSPATH . '/wp-admin/includes/plugin.php';
		}

if (is_plugin_active_for_network(LSCWP_BASENAME)) {
			$count++;
		}
		return $count;
	}

/**
	 * Is this deactivate call the last active installation on the multisite network?
	 *
	 * @since 1.0.12
	 * @access private
	 */
	private static function is_deactivate_last()
	{
		$count = self::get_network_count();
		if ($count === false) {
			return false;
		}
		if ($count !== 1) {
			// Not deactivating the last one.
			$count--;
			set_site_transient(self::NETWORK_TRANSIENT_COUNT, $count, DAY_IN_SECONDS);
			return false;
		}

delete_site_transient(self::NETWORK_TRANSIENT_COUNT);
		return true;
	}

/**
	 * The deactivation hook callback.
	 *
	 * Initializes all clean up functionalities.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public static function register_deactivation()
	{
		Task::destroy();

!defined('LSCWP_LOG_TAG') && define('LSCWP_LOG_TAG', 'Deactivate_' . get_current_blog_id());

Purge::purge_all();

if (is_multisite()) {
			if (!self::is_deactivate_last()) {
				if (is_network_admin()) {
					// Still other activated subsite left, set .htaccess with only CacheLookUp
					try {
						Htaccess::cls()->insert_ls_wrapper();
					} catch (\Exception $ex) {
						Admin_Display::error($ex->getMessage());
					}
				}
				return;
			}
		}

/* 1) wp-config.php; */

try {
			self::cls()->_manage_wp_cache_const(false);
		} catch (\Exception $ex) {
			error_log('In wp-config.php: WP_CACHE could not be set to false during deactivation!');

Admin_Display::error($ex->getMessage());
		}

/* 2) adv-cache.php; Dropped in v3.0.4 */

/* 3) object-cache.php; */

Object_Cache::cls()->del_file();

/* 4) .htaccess; */

try {
			Htaccess::cls()->clear_rules();
		} catch (\Exception $ex) {
			Admin_Display::error($ex->getMessage());
		}

/* 5) .litespeed_conf.dat; */

self::_del_conf_data_file();

// delete in case it's not deleted prior to deactivation.
		GUI::dismiss_whm();
	}

/**
	 * Manage related files based on plugin latest conf
	 *
	 * NOTE: Only trigger this in backend admin access for efficiency concern
	 *
	 * Handle files:
	 * 		1) wp-config.php;
	 * 		2) adv-cache.php;
	 * 		3) object-cache.php;
	 * 		4) .htaccess;
	 * 		5) .litespeed_conf.dat;
	 *
	 * @since 3.0
	 * @access public
	 */
	public function update_files()
	{
		Debug2::debug('🗂️ [Activation] update_files');

// Update cache setting `_CACHE`
		$this->cls('Conf')->define_cache();

// Site options applied already
		$options = $this->get_options();

/* 1) wp-config.php; */

try {
			$this->_manage_wp_cache_const($options[self::_CACHE]);
		} catch (\Exception $ex) {
			// Add msg to admin page or CLI
			Admin_Display::error($ex->getMessage());
		}

/* 2) adv-cache.php; Dropped in v3.0.4 */

/* 3) object-cache.php; */

if ($options[self::O_OBJECT] && (!$options[self::O_DEBUG_DISABLE_ALL] || is_multisite())) {
			$this->cls('Object_Cache')->update_file($options);
		} else {
			$this->cls('Object_Cache')->del_file(); // Note: because it doesn't reconnect, which caused setting page OC option changes delayed, thus may meet Connect Test Failed issue (Next refresh will correct it). Not a big deal, will keep as is.
		}

/* 4) .htaccess; */

try {
			$this->cls('Htaccess')->update($options);
		} catch (\Exception $ex) {
			Admin_Display::error($ex->getMessage());
		}

/* 5) .litespeed_conf.dat; */

if (($options[self::O_GUEST] || $options[self::O_OBJECT]) && (!$options[self::O_DEBUG_DISABLE_ALL] || is_multisite())) {
			$this->_update_conf_data_file($options);
		}
	}

/**
	 * Delete data conf file
	 *
	 * @since  4.1
	 */
	private static function _del_conf_data_file()
	{
		if (file_exists(self::$_data_file)) {
			unlink(self::$_data_file);
		}
	}

/**
	 * Update data conf file for guest mode & object cache
	 *
	 * @since  4.1
	 */
	private function _update_conf_data_file($options)
	{
		$ids = array();
		if ($options[self::O_OBJECT]) {
			$this_ids = array(
				self::O_DEBUG,
				self::O_OBJECT_KIND,
				self::O_OBJECT_HOST,
				self::O_OBJECT_PORT,
				self::O_OBJECT_LIFE,
				self::O_OBJECT_USER,
				self::O_OBJECT_PSWD,
				self::O_OBJECT_DB_ID,
				self::O_OBJECT_PERSISTENT,
				self::O_OBJECT_ADMIN,
				self::O_OBJECT_TRANSIENTS,
				self::O_OBJECT_GLOBAL_GROUPS,
				self::O_OBJECT_NON_PERSISTENT_GROUPS,
			);
			$ids = array_merge($ids, $this_ids);
		}

if ($options[self::O_GUEST]) {
			$this_ids = array(self::HASH, self::O_CACHE_LOGIN_COOKIE, self::O_DEBUG_IPS, self::O_UTIL_NO_HTTPS_VARY, self::O_GUEST_UAS, self::O_GUEST_IPS);
			$ids = array_merge($ids, $this_ids);
		}

$data = array();
		foreach ($ids as $v) {
			$data[$v] = $options[$v];
		}
		$data = \json_encode($data);

$old_data = File::read(self::$_data_file);
		if ($old_data != $data) {
			defined('LSCWP_LOG') && Debug2::debug('[Activation] Updating .litespeed_conf.dat');
			File::save(self::$_data_file, $data);
		}
	}

/**
	 * Update the WP_CACHE variable in the wp-config.php file.
	 *
	 * If enabling, check if the variable is defined, and if not, define it.
	 * Vice versa for disabling.
	 *
	 * @since 1.0.0
	 * @since  3.0 Refactored
	 * @access private
	 */
	private function _manage_wp_cache_const($enable)
	{
		if ($enable) {
			if (defined('WP_CACHE') && WP_CACHE) {
				return false;
			}
		} elseif (!defined('WP_CACHE') || (defined('WP_CACHE') && !WP_CACHE)) {
			return false;
		}

if (apply_filters('litespeed_wpconfig_readonly', false)) {
			throw new \Exception('wp-config file is forbidden to modify due to API hook: litespeed_wpconfig_readonly');
		}

/**
		 * Follow WP's logic to locate wp-config file
		 * @see wp-load.php
		 */
		$conf_file = ABSPATH . 'wp-config.php';
		if (!file_exists($conf_file)) {
			$conf_file = dirname(ABSPATH) . '/wp-config.php';
		}

$content = File::read($conf_file);
		if (!$content) {
			throw new \Exception('wp-config file content is empty: ' . $conf_file);
		}

// Remove the line `define('WP_CACHE', true/false);` first
		if (defined('WP_CACHE')) {
			$content = preg_replace('/define$\s*([\'"])WP_CACHE\1\s*,\s*\w+\s*$\s*;/sU', '', $content);
		}

// Insert const
		if ($enable) {
			$content = preg_replace('/^<\?php/', "<?php\ndefine( 'WP_CACHE', true );", $content);
		}

$res = File::save($conf_file, $content, false, false, false);

if ($res !== true) {
			throw new \Exception('wp-config.php operation failed when changing `WP_CACHE` const: ' . $res);
		}

return true;
	}

/**
	 * Handle auto update
	 *
	 * @since 2.7.2
	 * @access public
	 */
	public function auto_update()
	{
		if (!$this->conf(Base::O_AUTO_UPGRADE)) {
			return;
		}

add_filter('auto_update_plugin', array($this, 'auto_update_hook'), 10, 2);
	}

/**
	 * Auto upgrade hook
	 *
	 * @since  3.0
	 * @access public
	 */
	public function auto_update_hook($update, $item)
	{
		if (!empty($item->slug) && 'litespeed-cache' === $item->slug) {
			$auto_v = Cloud::version_check('auto_update_plugin');

if (!empty($auto_v['latest']) && !empty($item->new_version) && $auto_v['latest'] === $item->new_version) {
				return true;
			}
		}

return $update; // Else, use the normal API response to decide whether to update or not
	}

/**
	 * Upgrade LSCWP
	 *
	 * @since 2.9
	 * @access public
	 */
	public function upgrade()
	{
		$plugin = Core::PLUGIN_FILE;

/**
		 * @see wp-admin/update.php
		 */
		include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
		include_once ABSPATH . 'wp-admin/includes/file.php';
		include_once ABSPATH . 'wp-admin/includes/misc.php';

try {
			ob_start();
			$skin = new \WP_Ajax_Upgrader_Skin();
			$upgrader = new \Plugin_Upgrader($skin);
			$result = $upgrader->upgrade($plugin);
			if (!is_plugin_active($plugin)) {
				// todo: upgrade should reactivate the plugin again by WP. Need to check why disabled after upgraded.
				activate_plugin($plugin, '', is_multisite());
			}
			ob_end_clean();
		} catch (\Exception $e) {
			Admin_Display::error(__('Failed to upgrade.', 'litespeed-cache'));
			return;
		}

if (is_wp_error($result)) {
			Admin_Display::error(__('Failed to upgrade.', 'litespeed-cache'));
			return;
		}

Admin_Display::succeed(__('Upgraded successfully.', 'litespeed-cache'));
	}

/**
	 * Detect if the plugin is active or not
	 *
	 * @since  1.0
	 */
	public function dash_notifier_is_plugin_active($plugin)
	{
		include_once ABSPATH . 'wp-admin/includes/plugin.php';

$plugin_path = $plugin . '/' . $plugin . '.php';

return is_plugin_active($plugin_path);
	}

/**
	 * Detect if the plugin is installed or not
	 *
	 * @since  1.0
	 */
	public function dash_notifier_is_plugin_installed($plugin)
	{
		include_once ABSPATH . 'wp-admin/includes/plugin.php';

$plugin_path = $plugin . '/' . $plugin . '.php';

$valid = validate_plugin($plugin_path);

return !is_wp_error($valid);
	}

/**
	 * Grab a plugin info from WordPress
	 *
	 * @since  1.0
	 */
	public function dash_notifier_get_plugin_info($slug)
	{
		include_once ABSPATH . 'wp-admin/includes/plugin-install.php';
		$result = plugins_api('plugin_information', array('slug' => $slug));

if (is_wp_error($result)) {
			return false;
		}

return $result;
	}

/**
	 * Install the 3rd party plugin
	 *
	 * @since  1.0
	 */
	public function dash_notifier_install_3rd()
	{
		!defined('SILENCE_INSTALL') && define('SILENCE_INSTALL', true);

$slug = !empty($_GET['plugin']) ? $_GET['plugin'] : false;

// Check if plugin is installed already
		if (!$slug || $this->dash_notifier_is_plugin_active($slug)) {
			return;
		}

$plugin_path = $slug . '/' . $slug . '.php';

if (!$this->dash_notifier_is_plugin_installed($slug)) {
			$plugin_info = $this->dash_notifier_get_plugin_info($slug);
			if (!$plugin_info) {
				return;
			}
			// Try to install plugin
			try {
				ob_start();
				$skin = new \Automatic_Upgrader_Skin();
				$upgrader = new \Plugin_Upgrader($skin);
				$result = $upgrader->install($plugin_info->download_link);
				ob_end_clean();
			} catch (\Exception $e) {
				return;
			}
		}

if (!is_plugin_active($plugin_path)) {
			activate_plugin($plugin_path);
		}
	}

/**
	 * Handle all request actions from main cls
	 *
	 * @since  2.9
	 * @access public
	 */
	public function handler()
	{
		$type = Router::verify_type();

switch ($type) {
			case self::TYPE_UPGRADE:
				$this->upgrade();
				break;

case self::TYPE_INSTALL_3RD:
				$this->dash_notifier_install_3rd();
				break;

case self::TYPE_DISMISS_RECOMMENDED:
				Cloud::reload_summary();
				Cloud::save_summary(array('news.new' => 0));
				break;

case self::TYPE_INSTALL_ZIP:
				Cloud::reload_summary();
				$summary = Cloud::get_summary();
				if (!empty($summary['news.zip'])) {
					Cloud::save_summary(array('news.new' => 0));

$this->cls('Debug2')->beta_test($summary['zip']);
				}
				break;

default:
				break;
		}

Admin::redirect();
	}
}