/**
* Starts the NXTClass object cache.
*
* If an object-cache.php file exists in the nxt-content directory,
* it uses that drop-in as an external object cache.
*
* @access private
* @since 3.0.0
*/
function nxt_start_object_cache()
{
global $_nxt_using_ext_object_cache;
$first_init = false;
if (!function_exists('nxt_cache_init')) {
if (file_exists(nxt_CONTENT_DIR . '/object-cache.php')) {
require_once nxt_CONTENT_DIR . '/object-cache.php';
$_nxt_using_ext_object_cache = true;
} else {
require_once ABSPATH . nxtINC . '/cache.php';
$_nxt_using_ext_object_cache = false;
}
$first_init = true;
} else {
if (!$_nxt_using_ext_object_cache && file_exists(nxt_CONTENT_DIR . '/object-cache.php')) {
// Sometimes advanced-cache.php can load object-cache.php before it is loaded here.
// This breaks the function_exists check above and can result in $_nxt_using_ext_object_cache
// being set incorrectly. Double check if an external cache exists.
$_nxt_using_ext_object_cache = true;
}
}
// If cache supports reset, reset instead of init if already initialized.
// Reset signals to the cache that global IDs have changed and it may need to update keys
// and cleanup caches.
if (!$first_init && function_exists('nxt_cache_reset')) {
nxt_cache_reset();
} else {
nxt_cache_init();
}
if (function_exists('nxt_cache_add_global_groups')) {
nxt_cache_add_global_groups(array('users', 'userlogins', 'usermeta', 'user_meta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts'));
nxt_cache_add_non_persistent_groups(array('comment', 'counts', 'plugins'));
}
}
/**
* Restore the current blog, after calling switch_to_blog()
*
* @see switch_to_blog()
* @since MU
*
* @return bool True on success, False if we're already on the current blog
*/
function restore_current_blog()
{
global $table_prefix, $nxtdb, $blog_id, $switched, $switched_stack, $nxt_roles, $nxt_object_cache;
if (!$switched) {
return false;
}
if (!is_array($switched_stack)) {
return false;
}
$blog = array_pop($switched_stack);
if ($blog_id == $blog) {
do_action('switch_blog', $blog, $blog);
/* If we still have items in the switched stack, consider ourselves still 'switched' */
$switched = is_array($switched_stack) && count($switched_stack) > 0;
return true;
}
$nxtdb->set_blog_id($blog);
$prev_blog_id = $blog_id;
$blog_id = $blog;
$table_prefix = $nxtdb->prefix;
if (is_object($nxt_roles)) {
$nxtdb->suppress_errors();
if (method_exists($nxt_roles, '_init')) {
$nxt_roles->_init();
} elseif (method_exists($nxt_roles, '__construct')) {
$nxt_roles->__construct();
}
$nxtdb->suppress_errors(false);
}
if (did_action('init')) {
$current_user = nxt_get_current_user();
if (is_object($current_user)) {
$current_user->for_blog($blog_id);
}
}
if (is_object($nxt_object_cache) && isset($nxt_object_cache->global_groups)) {
$global_groups = $nxt_object_cache->global_groups;
} else {
$global_groups = false;
}
nxt_cache_init();
if (function_exists('nxt_cache_add_global_groups')) {
if (is_array($global_groups)) {
nxt_cache_add_global_groups($global_groups);
} else {
nxt_cache_add_global_groups(array('users', 'userlogins', 'usermeta', 'user_meta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts'));
}
nxt_cache_add_non_persistent_groups(array('comment', 'counts', 'plugins'));
}
do_action('switch_blog', $blog_id, $prev_blog_id);
/* If we still have items in the switched stack, consider ourselves still 'switched' */
$switched = is_array($switched_stack) && count($switched_stack) > 0;
return true;
}
