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<?php
namespace W3TC;
/**
* W3 Object Cache plugin - administrative interface
*/
/**
* class ObjectCache_Environment
*/
class ObjectCache_Environment {
/**
* Fixes environment in each wp-admin request
*
* @param Config $config Config.
* @param bool $force_all_checks Force checks flag.
*
* @throws Util_Environment_Exceptions Exceptions.
*/
public function fix_on_wpadmin_request( $config, $force_all_checks ) {
$exs = new Util_Environment_Exceptions();
$objectcache_enabled = $config->get_boolean( 'objectcache.enabled' );
try {
$addin_required = apply_filters( 'w3tc_objectcache_addin_required', $objectcache_enabled );
if ( $addin_required ) {
$this->create_addin();
} else {
$this->delete_addin();
}
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
$exs->push( $ex );
}
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Fixes environment once event occurs.
*
* @param Config $config Config.
* @param string $event Event.
* @param null|Config $old_config Old Config.
*
* @throws Util_Environment_Exceptions Exception.
*/
public function fix_on_event( $config, $event, $old_config = null ) {
$objectcache_enabled = $config->get_boolean( 'objectcache.enabled' );
$engine = $config->get_string( 'objectcache.engine' );
if ( $objectcache_enabled && 'file' === $engine ) {
$new_interval = $config->get_integer( 'objectcache.file.gc' );
$old_interval = $old_config ? $old_config->get_integer( 'objectcache.file.gc' ) : -1;
if ( null !== $old_config && $new_interval !== $old_interval ) {
$this->unschedule_gc();
}
if ( ! wp_next_scheduled( 'w3_objectcache_cleanup' ) ) {
wp_schedule_event( time(), 'w3_objectcache_cleanup', 'w3_objectcache_cleanup' );
}
} else {
$this->unschedule_gc();
}
}
/**
* Fixes environment after plugin deactivation.
*
* @throws Util_Environment_Exceptions Exception.
* @throws Util_WpFile_FilesystemOperationException Exception.
*
* @return void
*/
public function fix_after_deactivation() {
$exs = new Util_Environment_Exceptions();
try {
$this->delete_addin();
} catch ( Util_WpFile_FilesystemOperationException $ex ) {
$exs->push( $ex );
}
$this->unschedule_gc();
$this->unschedule_purge_wpcron();
if ( count( $exs->exceptions() ) > 0 ) {
throw $exs;
}
}
/**
* Returns required rules for module
*
* @var Config $config
* @return array
*/
function get_required_rules( $config ) {
return null;
}
/**
* scheduling stuff
*/
private function unschedule_gc() {
if ( wp_next_scheduled( 'w3_objectcache_cleanup' ) ) {
wp_clear_scheduled_hook( 'w3_objectcache_cleanup' );
}
}
/**
* Remove cron job for object cache purge.
*
* @since 2.8.0
*
* @return void
*/
private function unschedule_purge_wpcron() {
if ( wp_next_scheduled( 'w3tc_objectcache_purge_wpcron' ) ) {
wp_clear_scheduled_hook( 'w3tc_objectcache_purge_wpcron' );
}
}
/**
* Creates add-in
*
* @throws Util_WpFile_FilesystemOperationException
*/
private function create_addin() {
$src = W3TC_INSTALL_FILE_OBJECT_CACHE;
$dst = W3TC_ADDIN_FILE_OBJECT_CACHE;
if ( $this->objectcache_installed() ) {
if ( $this->is_objectcache_add_in() ) {
$script_data = @file_get_contents( $dst );
if ( $script_data == @file_get_contents( $src ) ) {
return;
}
} elseif ( 'yes' === get_transient( 'w3tc_remove_add_in_objectcache' ) ) {
// user already manually asked to remove another plugin's add in,
// we should try to apply ours
// (in case of missing permissions deletion could fail).
} elseif ( ! $this->is_objectcache_old_add_in() ) {
$page_val = Util_Request::get_string( 'page' );
if ( ! empty( $page_val ) ) {
$url = 'admin.php?page=' . $page_val . '&';
} else {
$url = basename(
Util_Environment::remove_query_all(
isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : ''
)
) . '?page=w3tc_dashboard&';
}
$remove_url = Util_Ui::admin_url( $url . 'w3tc_default_remove_add_in=objectcache' );
throw new Util_WpFile_FilesystemOperationException(
sprintf(
// translators: 1 HTML button link to remove object-cache.php file.
__(
'The Object Cache add-in file object-cache.php is not a W3 Total Cache drop-in. Remove it or disable Object Caching. %1$s',
'w3-total-cache'
),
Util_Ui::button_link(
__(
'Yes, remove it for me',
'w3-total-cache'
),
wp_nonce_url( $remove_url, 'w3tc' )
)
)
);
}
}
Util_WpFile::copy_file( $src, $dst );
}
/**
* Deletes add-in
*
* @throws Util_WpFile_FilesystemOperationException
*/
private function delete_addin() {
if ( $this->is_objectcache_add_in() )
Util_WpFile::delete_file( W3TC_ADDIN_FILE_OBJECT_CACHE );
}
/**
* Returns true if object-cache.php is installed
*
* @return boolean
*/
public function objectcache_installed() {
return file_exists( W3TC_ADDIN_FILE_OBJECT_CACHE );
}
/**
* Returns true if object-cache.php is old version.
*
* @return boolean
*/
public function is_objectcache_old_add_in() {
if ( !$this->objectcache_installed() )
return false;
return ( ( $script_data = @file_get_contents( W3TC_ADDIN_FILE_OBJECT_CACHE ) )
&& ( ( strstr( $script_data, 'W3 Total Cache Object Cache' ) !== false ) ||
strstr( $script_data, 'w3_instance' ) !== false ) );
}
/**
* Checks if object-cache.php is latest version
*
* @return boolean
*/
public function is_objectcache_add_in() {
if ( !$this->objectcache_installed() )
return false;
return ( ( $script_data = @file_get_contents( W3TC_ADDIN_FILE_OBJECT_CACHE ) )
&& strstr( $script_data, 'ObjectCache Version: 1.5' ) !== false );
}
}