Your IP : 18.218.150.40
<?php
/**
* Custom Facebook Feed Cache
*
* For the new feed builder
*
* @since 4.0
*/
namespace CustomFacebookFeed;
use CustomFacebookFeed\SB_Facebook_Data_Encryption;
class CFF_Cache {
/**
* @var int
*/
private $feed_id;
/**
* @var int
*/
private $page;
/**
* @var string
*/
private $suffix;
/**
* @var bool
*/
private $is_legacy;
/**
* @var int
*/
private $cache_time;
/**
* @var array
*/
private $posts;
/**
* @var array
*/
private $posts_page;
/**
* @var bool
*/
private $is_expired;
/**
* @var array
*/
private $header;
/**
* @var array
*/
private $resized_images;
/**
* @var array
*/
private $meta;
/**
* @var array
*/
private $posts_backup;
/**
* @var array
*/
private $header_backup;
/**
* @var object|SB_Facebook_Data_Encryption
*/
protected $encryption;
/**
* CFF_Cache constructor. Set the feed id, cache key, legacy
*
* @param string $feed_id
* @param int $page
* @param int $cache_time
* @param bool $is_legacy
*/
public function __construct( $feed_id, $page = 1, $cache_time = 0, $is_legacy = false ) {
$this->cache_time = (int)$cache_time;
$this->is_legacy = $is_legacy;
$this->page = $page;
if ( $this->page === 1 ) {
$this->suffix = '';
} else {
$this->suffix = '_' . $this->page;
}
$this->feed_id = $feed_id;
$this->encryption = new SB_Facebook_Data_Encryption();
}
/**
* Set all caches based on available data.
*
* @since 4.0
*/
public function retrieve_and_set() {
if ( ! $this->is_legacy ) {
$expired = true;
$existing_caches = $this->query_cff_feed_caches();
foreach ( $existing_caches as $cache ) {
switch( $cache['cache_key'] ) {
case 'posts':
$this->posts = $cache['cache_value'];
if ( strtotime( $cache['last_updated'] ) > time() - $this->cache_time ) {
$expired = false;
}
if ( empty( $cache['cache_value'] ) ) {
$expired = true;
}
break;
case 'posts' . $this->suffix:
$this->posts_page = $cache['cache_value'];
break;
case 'header':
$this->header = $cache['cache_value'];
break;
case 'resized_images'. $this->suffix:
$this->resized_images = $cache['cache_value'];
break;
case 'meta'. $this->suffix:
$this->meta = $cache['cache_value'];
break;
case 'posts_backup'. $this->suffix:
$this->posts_backup = $cache['cache_value'];
break;
case 'header_backup'. $this->suffix:
$this->posts_backup = $cache['cache_value'];
break;
}
}
$this->is_expired = $expired;
} else {
$transient_cache = get_transient( $this->feed_id );
if ( $transient_cache ) {
if ( strpos( $this->feed_id, 'cff_header_') !== false ) {
$this->header = $transient_cache;
$this->is_expired = false;
} else {
$this->posts = $transient_cache;
$this->is_expired = false;
}
} else {
$this->posts = array();
$this->is_expired = true;
}
$this->posts_backup = get_transient( '!cff_backup_' . $this->feed_id );
}
if ( $this->cache_time < 1 ) {
$this->is_expired = true;
}
}
/**
* Whether or not the cache needs to be refreshed
*
* @param string $cache_type
*
* @return bool
*
* @since 4.0
*/
public function is_expired( $cache_type = 'posts' ) {
if ( $cache_type !== 'posts' ) {
$cache = $this->get( $cache_type );
return (empty( $cache ) || $this->is_expired);
}
if ( $this->page === 1 ) {
return $this->is_expired;
} else {
if ( $this->is_expired ) {
return true;
}
if ( empty( $this->posts_page ) ) {
return true;
}
}
return false;
}
/**
* Get data currently stored in the database for the type
*
* @param string $type
*
* @return array
*
* @since 4.0
*/
public function get( $type ) {
$return = array();
switch( $type ) {
case 'posts':
$return = $this->posts;
break;
case 'posts' . $this->suffix:
$return = $this->posts_page;
break;
case 'header':
$return = $this->header;
break;
case 'resized_images':
$return = $this->resized_images;
break;
case 'meta':
$return = $this->meta;
break;
case 'posts_backup':
$return = $this->posts_backup;
break;
case 'header_backup':
$return = $this->header_backup;
break;
}
return $this->maybe_decrypt( $return );
}
/**
* @param string $type
* @param array $cache_value
*
* @since 4.0
*/
public function set( $type, $cache_value ) {
switch( $type ) {
case 'posts':
$this->posts = $cache_value;
break;
case 'posts' . $this->suffix:
$this->posts_page = $cache_value;
break;
case 'header':
$this->header = $cache_value;
break;
case 'resized_images':
$this->resized_images = $cache_value;
break;
case 'meta':
$this->meta = $cache_value;
break;
case 'posts_backup':
$this->posts_backup = $cache_value;
break;
case 'header_backup':
$this->header_backup = $cache_value;
break;
}
}
/**
* Update a single cache with new data. Try to accept any data and convert it
* to JSON if needed
*
* @param string $cache_type
* @param array|object|string $cache_value
* @param bool $include_backup
* @param bool $cron_update
*
* @return int
*
* @since 4.0
*/
public function update_or_insert( $cache_type, $cache_value, $include_backup = true, $cron_update = true ) {
$this->clear_wp_cache();
if ( $this->page > 1 || ($cache_type !== 'posts' && $cache_type !== 'header') ) {
$cron_update = false;
}
$cache_key = $cache_type . $this->suffix;
$this->set( $cache_key, $cache_value );
if ( is_array( $cache_value ) || is_object( $cache_value ) ) {
$cache_value = CFF_Utils::cff_json_encode( $cache_value );
}
$encrypted_cache_value = $this->maybe_encrypt( $cache_value );
if ( $this->is_legacy ) {
if ( $cache_key === 'posts' ) {
set_transient( $this->feed_id, $encrypted_cache_value, $this->cache_time );
if ( $include_backup ) {
set_transient( '!cff_backup_' . $this->feed_id, $encrypted_cache_value, YEAR_IN_SECONDS );
}
} elseif ( strpos( $cache_key, 'posts' ) !== false ) {
set_transient( $this->feed_id, $encrypted_cache_value, $this->cache_time );
} elseif ( strpos( $cache_key, 'header' ) !== false ) {
set_transient( $this->feed_id, $encrypted_cache_value, $this->cache_time );
}
return 1;
}
global $wpdb;
$cache_table_name = $wpdb->prefix . 'cff_feed_caches';
$sql = $wpdb->prepare( "
SELECT * FROM $cache_table_name
WHERE feed_id = %d
AND cache_key = %s", $this->feed_id, $cache_key );
$existing = $wpdb->get_results( $sql, ARRAY_A );
$data = array();
$where = array();
$format = array();
$data['cache_value'] = $this->maybe_encrypt( $cache_value );
$format[] = '%s';
$data['last_updated'] = date( 'Y-m-d H:i:s' );
$format[] = '%s';
if ( ! empty( $existing[0] ) ) {
$where['feed_id'] = $this->feed_id;
$where_format[] = '%d';
$where['cache_key'] = $cache_key;
$where_format[] = '%s';
$affected = $wpdb->update( $cache_table_name, $data, $where, $format, $where_format );
} else {
$data['cache_key'] = $cache_key;
$format[] = '%s';
$data['cron_update'] = $cron_update === true ? 'yes' : '';
$format[] = '%s';
$data['feed_id'] = $this->feed_id;
$format[] = '%d';
$affected = $wpdb->insert( $cache_table_name, $data, $format );
}
return $affected;
}
/**
* Tasks to do after a new set of posts are retrieved
*
* @since 4.0
*/
public function after_new_posts_retrieved() {
if ( $this->page === 1 ) {
$this->clear( 'all' );
}
}
/**
* Resets caches after they expire
*
* @param string $type
*
* @return bool|false|int
*/
public function clear( $type ) {
$this->clear_wp_cache();
global $wpdb;
$cache_table_name = $wpdb->prefix . 'cff_feed_caches';
if ( $type === 'all' ) {
$affected = $wpdb->query( $wpdb->prepare(
"UPDATE $cache_table_name
SET cache_value = ''
WHERE feed_id = %d
AND cache_key NOT IN ( 'posts', 'posts_backup', 'header_backup' );",
$this->feed_id ) );
} else {
$data = [ 'cache_value' => '' ];
$format = [ '%s' ];
$where['feed_id'] = $this->feed_id;
$where_format[] = '%d';
$where['cache_key'] = $type . $this->suffix;
$where_format[] = '%s';
$affected = $wpdb->update( $cache_table_name, $data, $where, $format, $where_format );
}
return $affected;
}
/**
* Clears caches in the WP Options table used mostly by legacy feeds.
*/
public static function clear_legacy(){
global $wpdb;
$cache_table_name = $wpdb->prefix . 'cff_feed_caches';
$sql = "
UPDATE $cache_table_name
SET cache_value = ''
WHERE cache_key = 'posts';";
$wpdb->query( $sql );
$table_name = $wpdb->prefix . "options";
$wpdb->query( "
DELETE
FROM $table_name
WHERE `option_name` LIKE ('%\_transient\_cff\_%')
" );
$wpdb->query( "
DELETE
FROM $table_name
WHERE `option_name` LIKE ('%\_transient\_cff\_ej\_%')
" );
$wpdb->query( "
DELETE
FROM $table_name
WHERE `option_name` LIKE ('%\_transient\_cff\_tle\_%')
" );
$wpdb->query( "
DELETE
FROM $table_name
WHERE `option_name` LIKE ('%\_transient\_cff\_album\_%')
" );
$wpdb->query( "
DELETE
FROM $table_name
WHERE `option_name` LIKE ('%\_transient\_timeout\_cff\_%')
" );
}
/**
* Clears caches in the CFF Feed Caches table.
*/
public static function clear_all_builder(){
global $wpdb;
$cache_table_name = $wpdb->prefix . 'cff_feed_caches';
$affected = $wpdb->query( $wpdb->prepare(
"UPDATE $cache_table_name
SET cache_value = '', last_updated = '0000-00-00 00:00:00'
WHERE cron_update = %s;",
'yes' ) );
return $affected;
}
/**
* Clears popular page caching solutions
*/
public static function clear_page_caches(){
//Clear cache of major caching plugins
if(isset($GLOBALS['wp_fastest_cache']) && method_exists($GLOBALS['wp_fastest_cache'], 'deleteCache')){
$GLOBALS['wp_fastest_cache']->deleteCache();
}
//WP Super Cache
if (function_exists('wp_cache_clear_cache')) {
wp_cache_clear_cache();
}
//W3 Total Cache
if (function_exists('w3tc_flush_all')) {
w3tc_flush_all();
}
if (function_exists('sg_cachepress_purge_cache')) {
sg_cachepress_purge_cache();
}
// Litespeed Cache (older method)
if ( method_exists( 'LiteSpeed_Cache_API', 'purge' ) ) {
LiteSpeed_Cache_API::purge( 'esi.custom-facebook-feed' );
}
// Litespeed Cache (new method)
if(has_action('litespeed_purge')) {
do_action( 'litespeed_purge', 'esi.custom-facebook-feed' );
}
}
/**
* Get all available caches from the cff_cache table.
*
* @return array
*
* @since 4.0
*/
private function query_cff_feed_caches() {
$feed_cache = wp_cache_get( $this->get_wp_cache_key() );
if ( false === $feed_cache ) {
global $wpdb;
$cache_table_name = $wpdb->prefix . 'cff_feed_caches';
if ( $this->page === 1 ) {
$sql = $wpdb->prepare( "
SELECT * FROM $cache_table_name
WHERE feed_id = %s", $this->feed_id );
} else {
$sql = $wpdb->prepare( "
SELECT * FROM $cache_table_name
WHERE feed_id = %s
AND cache_key IN ( 'posts', %s, %s, %s )",
$this->feed_id,
'posts_' . $this->page,
'resized_images_' . $this->page,
'meta_' . $this->page );
}
$feed_cache = $wpdb->get_results( $sql, ARRAY_A );
wp_cache_set( $this->get_wp_cache_key(), $feed_cache );
}
return $feed_cache;
}
/**
* Delete the wp_cache
*
* @since 4.0
*/
private function clear_wp_cache() {
wp_cache_delete( $this->get_wp_cache_key() );
}
/**
* Key used to get the wp cache key
*
* @return string
*
* @since 4.0
*/
private function get_wp_cache_key() {
return 'cff_feed_'. $this->feed_id . '_' . $this->page;
}
/**
* Uses a raw value and attempts to encrypt it
*
* @param $value
*
* @return bool|string
*/
private function maybe_encrypt( $value ) {
if ( ! empty( $value ) && ! is_string( $value ) ) {
$value = cff_json_encode( $value );
}
if ( empty( $value ) ) {
return $value;
}
return $this->encryption->encrypt( $value );
}
/**
* Uses a raw value and attempts to decrypt it
*
* @param $value
*
* @return bool|string
*/
private function maybe_decrypt( $value ) {
if ( ! is_string( $value ) ) {
return $value;
}
if ( strpos( $value, '{' ) === 0 ) {
return $value;
}
$decrypted = $this->encryption->decrypt( $value );
if ( ! $decrypted ) {
return $value;
}
return $decrypted;
}
}