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<?php

/**
 * The abstract instance
 *
 * @since      	3.0
 */

namespace LiteSpeed;

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

abstract class Root
{
	const CONF_FILE = '.litespeed_conf.dat';
	// Instance set
	private static $_instances;

	private static $_options = array();
	private static $_const_options = array();
	private static $_primary_options = array();
	private static $_network_options = array();

	/**
	 * Check if need to separate ccss for mobile
	 *
	 * @since  4.7
	 * @access protected
	 */
	protected function _separate_mobile()
	{
		return (wp_is_mobile() || apply_filters('litespeed_is_mobile', false)) && $this->conf(Base::O_CACHE_MOBILE);
	}

	/**
	 * Log a debug message.
	 *
	 * @since  4.4
	 * @access public
	 */
	public static function debug($msg, $backtrace_limit = false)
	{
		if (!defined('LSCWP_LOG')) {
			return;
		}

		if (defined('static::LOG_TAG')) {
			$msg = static::LOG_TAG . '  ' . $msg;
		}

		Debug2::debug($msg, $backtrace_limit);
	}

	/**
	 * Log an advanced debug message.
	 *
	 * @since  4.4
	 * @access public
	 */
	public static function debug2($msg, $backtrace_limit = false)
	{
		if (!defined('LSCWP_LOG_MORE')) {
			return;
		}

		if (defined('static::LOG_TAG')) {
			$msg = static::LOG_TAG . '  ' . $msg;
		}
		Debug2::debug2($msg, $backtrace_limit);
	}

	/**
	 * Check if there is cache folder for that type
	 *
	 * @since  3.0
	 */
	public function has_cache_folder($type)
	{
		$subsite_id = is_multisite() && !is_network_admin() ? get_current_blog_id() : '';

		if (file_exists(LITESPEED_STATIC_DIR . '/' . $type . '/' . $subsite_id)) {
			return true;
		}
		return false;
	}

	/**
	 * Maybe make the cache folder if not existed
	 *
	 * @since 4.4.2
	 */
	protected function _maybe_mk_cache_folder($type)
	{
		if (!$this->has_cache_folder($type)) {
			$subsite_id = is_multisite() && !is_network_admin() ? get_current_blog_id() : '';
			$path = LITESPEED_STATIC_DIR . '/' . $type . '/' . $subsite_id;
			mkdir($path, 0755, true);
		}
	}

	/**
	 * Delete file-based cache folder for that type
	 *
	 * @since  3.0
	 */
	public function rm_cache_folder($type)
	{
		if (!$this->has_cache_folder($type)) {
			return;
		}

		$subsite_id = is_multisite() && !is_network_admin() ? get_current_blog_id() : '';

		File::rrmdir(LITESPEED_STATIC_DIR . '/' . $type . '/' . $subsite_id);

		// Clear All summary data
		self::save_summary(false, false, true);

		if ($type == 'ccss' || $type == 'ucss') {
			Debug2::debug('[CSS] Cleared ' . $type . ' queue');
		} elseif ($type == 'avatar') {
			Debug2::debug('[Avatar] Cleared ' . $type . ' queue');
		} elseif ($type == 'css' || $type == 'js') {
			return;
		} else {
			Debug2::debug('[' . strtoupper($type) . '] Cleared ' . $type . ' queue');
		}
	}

	/**
	 * Build the static filepath
	 *
	 * @since  4.0
	 */
	protected function _build_filepath_prefix($type)
	{
		$filepath_prefix = '/' . $type . '/';
		if (is_multisite()) {
			$filepath_prefix .= get_current_blog_id() . '/';
		}

		return $filepath_prefix;
	}

	/**
	 * Load current queues from data file
	 *
	 * @since  4.1
	 * @since  4.3 Elevated to root.cls
	 */
	public function load_queue($type)
	{
		$filepath_prefix = $this->_build_filepath_prefix($type);
		$static_path = LITESPEED_STATIC_DIR . $filepath_prefix . '.litespeed_conf.dat';

		$queue = array();
		if (file_exists($static_path)) {
			$queue = \json_decode(file_get_contents($static_path), true) ?: array();
		}

		return $queue;
	}

	/**
	 * Save current queues to data file
	 *
	 * @since  4.1
	 * @since  4.3 Elevated to root.cls
	 */
	public function save_queue($type, $list)
	{
		$filepath_prefix = $this->_build_filepath_prefix($type);
		$static_path = LITESPEED_STATIC_DIR . $filepath_prefix . '.litespeed_conf.dat';

		$data = \json_encode($list);

		File::save($static_path, $data, true);
	}

	/**
	 * Clear all waiting queues
	 *
	 * @since  3.4
	 * @since  4.3 Elevated to root.cls
	 */
	public function clear_q($type, $silent = false)
	{
		$filepath_prefix = $this->_build_filepath_prefix($type);
		$static_path = LITESPEED_STATIC_DIR . $filepath_prefix . '.litespeed_conf.dat';

		if (file_exists($static_path)) {
			$silent = false;
			unlink($static_path);
		}

		if (!$silent) {
			$msg = __('All QUIC.cloud service queues have been cleared.', 'litespeed-cache');
			Admin_Display::succeed($msg);
		}
	}

	/**
	 * Load an instance or create it if not existed
	 * @since  4.0
	 */
	public static function cls($cls = false, $unset = false, $data = false)
	{
		if (!$cls) {
			$cls = self::ori_cls();
		}
		$cls = __NAMESPACE__ . '\\' . $cls;

		$cls_tag = strtolower($cls);

		if (!isset(self::$_instances[$cls_tag])) {
			if ($unset) {
				return;
			}

			self::$_instances[$cls_tag] = new $cls($data);
		} else {
			if ($unset) {
				unset(self::$_instances[$cls_tag]);
				return;
			}
		}

		return self::$_instances[$cls_tag];
	}

	/**
	 * Set one conf or confs
	 */
	public function set_conf($id, $val = null)
	{
		if (is_array($id)) {
			foreach ($id as $k => $v) {
				$this->set_conf($k, $v);
			}
			return;
		}
		self::$_options[$id] = $val;
	}

	/**
	 * Set one primary conf or confs
	 */
	public function set_primary_conf($id, $val = null)
	{
		if (is_array($id)) {
			foreach ($id as $k => $v) {
				$this->set_primary_conf($k, $v);
			}
			return;
		}
		self::$_primary_options[$id] = $val;
	}

	/**
	 * Set one network conf
	 */
	public function set_network_conf($id, $val = null)
	{
		if (is_array($id)) {
			foreach ($id as $k => $v) {
				$this->set_network_conf($k, $v);
			}
			return;
		}
		self::$_network_options[$id] = $val;
	}

	/**
	 * Set one const conf
	 */
	public function set_const_conf($id, $val)
	{
		self::$_const_options[$id] = $val;
	}

	/**
	 * Check if is overwritten by const
	 *
	 * @since  3.0
	 */
	public function const_overwritten($id)
	{
		if (!isset(self::$_const_options[$id]) || self::$_const_options[$id] == self::$_options[$id]) {
			return null;
		}
		return self::$_const_options[$id];
	}

	/**
	 * Check if is overwritten by primary site
	 *
	 * @since  3.2.2
	 */
	public function primary_overwritten($id)
	{
		if (!isset(self::$_primary_options[$id]) || self::$_primary_options[$id] == self::$_options[$id]) {
			return null;
		}

		// Network admin settings is impossible to be overwritten by primary
		if (is_network_admin()) {
			return null;
		}

		return self::$_primary_options[$id];
	}

	/**
	 * Get the list of configured options for the blog.
	 *
	 * @since 1.0
	 */
	public function get_options($ori = false)
	{
		if (!$ori) {
			return array_merge(self::$_options, self::$_primary_options, self::$_network_options, self::$_const_options);
		}

		return self::$_options;
	}

	/**
	 * If has a conf or not
	 */
	public function has_conf($id)
	{
		return array_key_exists($id, self::$_options);
	}

	/**
	 * If has a primary conf or not
	 */
	public function has_primary_conf($id)
	{
		return array_key_exists($id, self::$_primary_options);
	}

	/**
	 * If has a network conf or not
	 */
	public function has_network_conf($id)
	{
		return array_key_exists($id, self::$_network_options);
	}

	/**
	 * Get conf
	 */
	public function conf($id, $ori = false)
	{
		if (isset(self::$_options[$id])) {
			if (!$ori) {
				$val = $this->const_overwritten($id);
				if ($val !== null) {
					defined('LSCWP_LOG') && Debug2::debug('[Conf] 🏛️ const option ' . $id . '=' . var_export($val, true));
					return $val;
				}

				$val = $this->primary_overwritten($id); // Network Use primary site settings
				if ($val !== null) {
					return $val;
				}
			}

			// Network original value will be in _network_options
			if (!is_network_admin() || !$this->has_network_conf($id)) {
				return self::$_options[$id];
			}
		}

		if ($this->has_network_conf($id)) {
			if (!$ori) {
				$val = $this->const_overwritten($id);
				if ($val !== null) {
					defined('LSCWP_LOG') && Debug2::debug('[Conf] 🏛️ const option ' . $id . '=' . var_export($val, true));
					return $val;
				}
			}

			return $this->network_conf($id);
		}

		defined('LSCWP_LOG') && Debug2::debug('[Conf] Invalid option ID ' . $id);

		return null;
	}

	/**
	 * Get primary conf
	 */
	public function primary_conf($id)
	{
		return self::$_primary_options[$id];
	}

	/**
	 * Get network conf
	 */
	public function network_conf($id)
	{
		if (!$this->has_network_conf($id)) {
			return null;
		}

		return self::$_network_options[$id];
	}

	/**
	 * Get called class short name
	 */
	public static function ori_cls()
	{
		$cls = new \ReflectionClass(get_called_class());
		$shortname = $cls->getShortName();
		$namespace = str_replace(__NAMESPACE__ . '\\', '', $cls->getNamespaceName() . '\\');
		if ($namespace) {
			// the left namespace after dropped LiteSpeed
			$shortname = $namespace . $shortname;
		}

		return $shortname;
	}

	/**
	 * Generate conf name for wp_options record
	 *
	 * @since 3.0
	 */
	public static function name($id)
	{
		$name = strtolower(self::ori_cls());
		if ($name == 'conf2') {
			// For a certain 3.7rc correction, can be dropped after v4
			$name = 'conf';
		}
		return 'litespeed.' . $name . '.' . $id;
	}

	/**
	 * Dropin with prefix for WP's get_option
	 *
	 * @since 3.0
	 */
	public static function get_option($id, $default_v = false)
	{
		$v = get_option(self::name($id), $default_v);

		// Maybe decode array
		if (is_array($default_v)) {
			$v = self::_maybe_decode($v);
		}

		return $v;
	}

	/**
	 * Dropin with prefix for WP's get_site_option
	 *
	 * @since 3.0
	 */
	public static function get_site_option($id, $default_v = false)
	{
		$v = get_site_option(self::name($id), $default_v);

		// Maybe decode array
		if (is_array($default_v)) {
			$v = self::_maybe_decode($v);
		}

		return $v;
	}

	/**
	 * Dropin with prefix for WP's get_blog_option
	 *
	 * @since 3.0
	 */
	public static function get_blog_option($blog_id, $id, $default_v = false)
	{
		$v = get_blog_option($blog_id, self::name($id), $default_v);

		// Maybe decode array
		if (is_array($default_v)) {
			$v = self::_maybe_decode($v);
		}

		return $v;
	}

	/**
	 * Dropin with prefix for WP's add_option
	 *
	 * @since 3.0
	 */
	public static function add_option($id, $v)
	{
		add_option(self::name($id), self::_maybe_encode($v));
	}

	/**
	 * Dropin with prefix for WP's add_site_option
	 *
	 * @since 3.0
	 */
	public static function add_site_option($id, $v)
	{
		add_site_option(self::name($id), self::_maybe_encode($v));
	}

	/**
	 * Dropin with prefix for WP's update_option
	 *
	 * @since 3.0
	 */
	public static function update_option($id, $v)
	{
		update_option(self::name($id), self::_maybe_encode($v));
	}

	/**
	 * Dropin with prefix for WP's update_site_option
	 *
	 * @since 3.0
	 */
	public static function update_site_option($id, $v)
	{
		update_site_option(self::name($id), self::_maybe_encode($v));
	}

	/**
	 * Decode an array
	 *
	 * @since  4.0
	 */
	private static function _maybe_decode($v)
	{
		if (!is_array($v)) {
			$v2 = \json_decode($v, true);
			if ($v2 !== null) {
				$v = $v2;
			}
		}
		return $v;
	}

	/**
	 * Encode an array
	 *
	 * @since  4.0
	 */
	private static function _maybe_encode($v)
	{
		if (is_array($v)) {
			$v = \json_encode($v) ?: $v; // Non utf-8 encoded value will get failed, then used ori value
		}
		return $v;
	}

	/**
	 * Dropin with prefix for WP's delete_option
	 *
	 * @since 3.0
	 */
	public static function delete_option($id)
	{
		delete_option(self::name($id));
	}

	/**
	 * Dropin with prefix for WP's delete_site_option
	 *
	 * @since 3.0
	 */
	public static function delete_site_option($id)
	{
		delete_site_option(self::name($id));
	}

	/**
	 * Read summary
	 *
	 * @since  3.0
	 * @access public
	 */
	public static function get_summary($field = false)
	{
		$summary = self::get_option('_summary', array());

		if (!is_array($summary)) {
			$summary = array();
		}

		if (!$field) {
			return $summary;
		}

		if (array_key_exists($field, $summary)) {
			return $summary[$field];
		}

		return null;
	}

	/**
	 * Save summary
	 *
	 * @since  3.0
	 * @access public
	 */
	public static function save_summary($data = false, $reload = false, $overwrite = false)
	{
		if ($reload || empty(static::cls()->_summary)) {
			self::reload_summary();
		}

		$existing_summary = static::cls()->_summary;
		if ($overwrite || !is_array($existing_summary)) {
			$existing_summary = array();
		}
		$new_summary = array_merge($existing_summary, $data ?: array());
		// self::debug2( 'Save after Reloaded summary', $new_summary );
		static::cls()->_summary = $new_summary;

		self::update_option('_summary', $new_summary);
	}

	/**
	 * Reload summary
	 * @since 5.0
	 */
	public static function reload_summary()
	{
		static::cls()->_summary = self::get_summary();
		// self::debug2( 'Reloaded summary', static::cls()->_summary );
	}

	/**
	 * Get the current instance object. To be inherited.
	 *
	 * @since 3.0
	 */
	public static function get_instance()
	{
		return static::cls();
	}
}