<?php

class SortRecord 
{
    public $key;
    public $mode;
    public $order;

    function __construct($key, $mode, $order)
    {        
        $this->key = $key;
        $this->order = ((boolean)($order) === false) ? 1 : -1;
        $this->mode = $mode;
    }

    function compare($a, $b)
    {
        if($a[$this->key] == $b[$this->key]) {
            return 0;
        }
        return ($a[$this->key] > $b[$this->key]) ? $this->order : -$this->order;
    }

    function compareKeys($a, $b)
    {
        if($a->{$this->key} == $b->{$this->key}) {
            return 0;
        }
        return ($a->{$this->key} > $b->{$this->key}) ? $this->order : -$this->order;
    }

    function sort(&$list)
    {
        return usort($list, array($this, 'compare'));
    }

    function sortKeys(&$list)
    {
        return usort($list, array($this, 'compareKeys'));
    }

    function group(&$list, $key, $types)
    {
        $groups = array();
        foreach ($types as $name) {
            $groups[$name] = array();
        }
        $groups['_any_'] = array();
        foreach ($list as $item) {
            if (isset($groups[$item[$key]])) {
                $groups[$item[$key]][] = $item;
            } else {
                $groups['_any_'][] = $item;
            }
        }
        $result = array();
        foreach ($groups as $value) {
            $result = array_merge($result, $value);
        }
        $list = $result;            
    }
}