/**
* add value(s) to a list in redis
*
* examples to add items include this:
*
* {{{
* Lists::add('foo', 'bar'); // adds `bar` to a list called `foo`
* Lists::add('foo', array('bar', 'baz')); // adds `bar` and `baz` to a list called `foo`
* }}}
*
* @see li3_redis\storage\Redis::listAdd()
* @see li3_redis\storage\Redis::getKey()
* @param string $key redis key in which to store the hash
* @param string|array $values an item or an array of items to add to the list
* @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 $options array with additional options, see Redis::getKey()
* @return mixed the number of items in the list, or an array on multiple buckets
* @filter
*/
public static function add($key, $values, $buckets = null, array $options = array())
{
$defaults = array('namespace' => static::$namespace);
$options += $defaults;
$params = compact('key', 'values', 'buckets', 'options');
return static::_filter(__METHOD__, $params, function ($self, $params) {
extract($params);
if (is_null($buckets)) {
return Redis::listAdd($key, $values, $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::listAdd($key, $values, $options);
}
return count($result) > 1 ? $result : array_shift($result);
});
}
