/** * get amount of items within a list from redis * * {{{ * Lists::count('key'); * Lists::count('key', array('user' => 'foo', 'global')); // for multiple buckets at once * }}} * * @see li3_redis\storage\Redis::listLength() * @see li3_redis\storage\Redis::getKey() * @param string $key The key to uniquely identify the item in redis * @param string|array $buckets an array of additional prefixes, can be a numerical indexed * array with strings, or an associated array, in which the key and value will be glued * together by a separater or just a string, for one additional prefix. * @param array $options array with additional options, see Redis::getKey() * @return integer|boolean the number of values in that list, false if key does not exist * @filter */ public static function count($key, $buckets = null, array $options = array()) { $defaults = array('namespace' => static::$namespace); $options += $defaults; $params = compact('key', 'buckets', 'options'); return static::_filter(__METHOD__, $params, function ($self, $params) { extract($params); if (is_null($buckets)) { return Redis::listLength($key, $options); } $result = array(); $buckets = !is_array($buckets) ? array($buckets) : $buckets; foreach ($buckets as $prefix => $val) { $options['prefix'] = !is_numeric($prefix) ? Redis::addPrefix($val, $prefix) : $val; $result[$options['prefix']] = Redis::listLength($key, $options); } return count($result) > 1 ? $result : array_shift($result); }); }