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✏️ Editing: class-fs-cache-manager.php

<?php
    /**
     * @package     Freemius
     * @copyright   Copyright (c) 2015, Freemius, Inc.
     * @license     https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3
     * @since       1.1.6
     */

if ( ! defined( 'ABSPATH' ) ) {
        exit;
    }

class FS_Cache_Manager {
        /**
         * @var FS_Option_Manager
         */
        private $_options;
        /**
         * @var FS_Logger
         */
        private $_logger;

/**
         * @var FS_Cache_Manager[]
         */
        private static $_MANAGERS = array();

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.3
         *
         * @param string $id
         */
        private function __construct( $id ) {
            $this->_logger = FS_Logger::get_logger( WP_FS__SLUG . '_cach_mngr_' . $id, WP_FS__DEBUG_SDK, WP_FS__ECHO_DEBUG_SDK );

$this->_logger->entrance();
            $this->_logger->log( 'id = ' . $id );

$this->_options = FS_Option_Manager::get_manager( $id, true, true, false );
        }

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param $id
         *
         * @return FS_Cache_Manager
         */
        static function get_manager( $id ) {
            $id = strtolower( $id );

if ( ! isset( self::$_MANAGERS[ $id ] ) ) {
                self::$_MANAGERS[ $id ] = new FS_Cache_Manager( $id );
            }

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

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @return bool
         */
        function is_empty() {
            $this->_logger->entrance();

return $this->_options->is_empty();
        }

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         */
        function clear() {
            $this->_logger->entrance();

$this->_options->clear( true );
        }

/**
         * Delete cache manager from DB.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.0.9
         */
        function delete() {
            $this->_options->delete();
        }

/**
         * Check if there's a cached item.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string $key
         *
         * @return bool
         */
        function has( $key ) {
            $cache_entry = $this->_options->get_option( $key, false );

return ( is_object( $cache_entry ) &&
                     isset( $cache_entry->timestamp ) &&
                     is_numeric( $cache_entry->timestamp )
            );
        }

/**
         * Check if there's a valid cached item.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string   $key
         * @param null|int $expiration Since 1.2.2.7
         *
         * @return bool
         */
        function has_valid( $key, $expiration = null ) {
            $cache_entry = $this->_options->get_option( $key, false );

$is_valid = ( is_object( $cache_entry ) &&
                          isset( $cache_entry->timestamp ) &&
                          is_numeric( $cache_entry->timestamp ) &&
                          $cache_entry->timestamp > WP_FS__SCRIPT_START_TIME
            );

if ( $is_valid &&
                 is_numeric( $expiration ) &&
                 isset( $cache_entry->created ) &&
                 is_numeric( $cache_entry->created ) &&
                 $cache_entry->created + $expiration < WP_FS__SCRIPT_START_TIME
            ) {
                /**
                 * Even if the cache is still valid, since we are checking for validity
                 * with an explicit expiration period, if the period has past, return
                 * `false` as if the cache is invalid.
                 *
                 * @since 1.2.2.7
                 */
                $is_valid = false;
            }

return $is_valid;
        }

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string $key
         * @param mixed  $default
         *
         * @return mixed
         */
        function get( $key, $default = null ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = $this->_options->get_option( $key, false );

if ( is_object( $cache_entry ) &&
                 isset( $cache_entry->timestamp ) &&
                 is_numeric( $cache_entry->timestamp )
            ) {
                return $cache_entry->result;
            }

return is_object( $default ) ? clone $default : $default;
        }

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string $key
         * @param mixed  $default
         *
         * @return mixed
         */
        function get_valid( $key, $default = null ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = $this->_options->get_option( $key, false );

if ( is_object( $cache_entry ) &&
                 isset( $cache_entry->timestamp ) &&
                 is_numeric( $cache_entry->timestamp ) &&
                 $cache_entry->timestamp > WP_FS__SCRIPT_START_TIME
            ) {
                return $cache_entry->result;
            }

return is_object( $default ) ? clone $default : $default;
        }

/**
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string $key
         * @param mixed  $value
         * @param int    $expiration
         * @param int    $created Since 2.0.0 Cache creation date.
         */
        function set( $key, $value, $expiration = WP_FS__TIME_24_HOURS_IN_SEC, $created = WP_FS__SCRIPT_START_TIME ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = new stdClass();

$cache_entry->result    = $value;
            $cache_entry->created   = $created;
            $cache_entry->timestamp = $created + $expiration;
            $this->_options->set_option( $key, $cache_entry, true );
        }

/**
         * Get cached record expiration, or false if not cached or expired.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.1.7.3
         *
         * @param string $key
         *
         * @return bool|int
         */
        function get_record_expiration( $key ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = $this->_options->get_option( $key, false );

return false;
        }

/**
         * Purge cached item.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.1.6
         *
         * @param string $key
         */
        function purge( $key ) {
            $this->_logger->entrance( 'key = ' . $key );

$this->_options->unset_option( $key, true );
        }

/**
         * Extend cached item caching period.
         *
         * @author Vova Feldman (@svovaf)
         * @since  2.0.0
         *
         * @param string $key
         * @param int    $expiration
         *
         * @return bool
         */
        function update_expiration( $key, $expiration = WP_FS__TIME_24_HOURS_IN_SEC ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = $this->_options->get_option( $key, false );

if ( ! is_object( $cache_entry ) ||
                 ! isset( $cache_entry->timestamp ) ||
                 ! is_numeric( $cache_entry->timestamp )
            ) {
                return false;
            }

$this->set( $key, $cache_entry->result, $expiration, $cache_entry->created );

return true;
        }

/**
         * Set cached item as expired.
         *
         * @author Vova Feldman (@svovaf)
         * @since  1.2.2.7
         *
         * @param string $key
         */
        function expire( $key ) {
            $this->_logger->entrance( 'key = ' . $key );

$cache_entry = $this->_options->get_option( $key, false );

if ( is_object( $cache_entry ) &&
                 isset( $cache_entry->timestamp ) &&
                 is_numeric( $cache_entry->timestamp )
            ) {
                // Set to expired.
                $cache_entry->timestamp = WP_FS__SCRIPT_START_TIME;
                $this->_options->set_option( $key, $cache_entry, true );
            }
        }

#--------------------------------------------------------------------------------
        #region Migration
        #--------------------------------------------------------------------------------

/**
         * Migrate options from site level.
         *
         * @author Vova Feldman (@svovaf)
         * @since  2.0.0
         */
        function migrate_to_network() {
            $this->_options->migrate_to_network();
        }

#endregion
    }

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