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<?php
namespace Punic;
use Collator;
use Exception as PHPException;
/**
* Various helper stuff.
*/
class Comparer
{
/**
* @var array
*/
private $cache;
/**
* @var bool
*/
private $caseSensitive;
/**
* @var Collator|null
*/
private $collator;
/**
* @var bool
*/
private $iconv;
/**
* Initializes the instance.
*
* @param string $locale
* @param bool $caseSensitive
*/
public function __construct($locale = null, $caseSensitive = false)
{
$this->cache = array();
$this->locale = isset($locale) ? $locale : \Punic\Data::getDefaultLocale();
$this->caseSensitive = (bool) $caseSensitive;
$this->collator = null;
if (class_exists('\Collator')) {
try {
$this->collator = new Collator($this->locale);
} catch (PHPException $x) {
}
}
$this->iconv = function_exists('iconv');
}
/**
* @param string $str
*
* @return string
*/
private function normalize($str)
{
$str = (string) $str;
if (!isset($this->cache[$str])) {
$this->cache[$str] = $str;
if ($str !== '') {
if ($this->iconv) {
$transliterated = @iconv('UTF-8', 'ASCII//TRANSLIT', $str);
if ($transliterated !== false) {
$this->cache[$str] = $transliterated;
}
}
}
}
return $this->cache[$str];
}
/**
* Compare two strings.
*
* @param string $a
* @param string $b
*
* @return int
*/
public function compare($a, $b)
{
$result = null;
if (isset($this->collator)) {
try {
$a = (string) $a;
$b = (string) $b;
if ($this->caseSensitive) {
$result = $this->collator->compare($a, $b);
} else {
$array = array($a, $b);
if ($this->sort($array) === false) {
$result = false;
} else {
$ia = array_search($a, $array);
if ($ia === 1) {
$result = 1;
} else {
$ib = array_search($b, $array);
if ($ib === 1) {
$result = -1;
} else {
$result = 0;
}
}
}
}
} catch (PHPException $x) {
}
}
if ($result === null) {
$a = $this->normalize($a);
$b = $this->normalize($b);
$result = $this->caseSensitive ? strnatcmp($a, $b) : strnatcasecmp($a, $b);
}
return $result;
}
/**
* @param array $array
* @param bool $keepKeys
*
* @return array
*/
public function sort(&$array, $keepKeys = false)
{
$me = $this;
$result = null;
if (isset($this->collator)) {
try {
if ($keepKeys) {
$result = $this->collator->asort($array);
} else {
$result = $this->collator->sort($array);
}
} catch (PHPException $x) {
}
}
if ($result === null) {
if ($keepKeys) {
$result = uasort(
$array,
function ($a, $b) use ($me) {
return $me->compare($a, $b);
}
);
} else {
$result = usort(
$array,
function ($a, $b) use ($me) {
return $me->compare($a, $b);
}
);
}
}
return $result;
}
}