/**
* Get new collection groupped by $groupper argument
* If the $grupper
* @param int|string|callable $groupper
* @param bool $force_property Force to handle $groupper as property name
* @return Collection
*/
public function group($groupper, $force_property = false)
{
$res = new Collection();
$initial_key = key($this->data);
if (!$force_property) {
if (is_numeric($groupper)) {
$c = 0;
$r = 0;
foreach ($this as $item) {
if ($c % $groupper == 0) {
$r++;
}
if (!isset($res[$r])) {
$res[$r] = new Collection();
}
$res[$r][] = $item;
$c++;
}
$this->setPosition($initial_key);
return $res;
}
if (is_callable($groupper)) {
foreach ($this as $item) {
$key = call_user_func($groupper, $item);
if (!isset($res[$key])) {
$res[$key] = new Collection();
}
$res[$key][] = $item;
}
$this->setPosition($initial_key);
return $res;
}
}
if (is_string($groupper)) {
$modifiers = array();
if (preg_match("~\\|~", $groupper)) {
$groupper_parts = explode("|", $groupper, 2);
$groupper = trim($groupper_parts[0]);
$p = new Template\ModifierParser();
$parsed_modifiers = $p->parse('|' . $groupper_parts[1]);
if ($parsed_modifiers) {
foreach ($parsed_modifiers as $pmod) {
$callback = $pmod['name'];
$args = $pmod['args'];
if (!is_callable($callback)) {
continue;
}
$self_key = array_keys($args, "self");
if (isset($self_key[0])) {
$self_key = $self_key[0];
} else {
array_unshift($args, '');
$self_key = 0;
}
foreach ($args as &$arg_v) {
$arg_v = trim($arg_v, '"\'');
}
$modifiers[] = array($callback, $args, $self_key);
}
}
}
foreach ($this as $item) {
$key = $item[$groupper];
if (is_null($key)) {
$key = '';
} else {
foreach ($modifiers as $mod) {
$callback = $mod[0];
$self_key = $mod[2];
$args = $mod[1];
$args[$self_key] = $key;
$key = call_user_func_array($callback, $args);
}
}
if ($key instanceof Entity) {
$key_index = $key['id'];
} else {
$key_index = $key;
}
if (!isset($res[$key_index])) {
$group_collection = $this->fork();
$group_collection->group_key = $key;
$res[$key_index] = $group_collection;
}
$res[$key_index][] = $item;
}
$this->setPosition($initial_key);
return $res;
}
$this->setPosition($initial_key);
}
public static function getVarModifiers($source_str)
{
$p = new ModifierParser();
$res = $p->parse($source_str);
return $res;
}
