/**
* Constructor. Register built in Transformers.
*/
private function __construct()
{
$this->registerBuiltInTransformers();
usort($this->items, function (TransformerInterface $a, TransformerInterface $b) {
return Utils::cmpInt($b->getPriority(), $a->getPriority());
});
}
/**
* Sort fixers by their priorities.
*
* @return $this
*/
private function sortFixers()
{
// Schwartzian transform is used to improve the efficiency and avoid
// `usort(): Array was modified by the user comparison function` warning for mocked objects.
$data = array_map(function (FixerInterface $fixer) {
return array($fixer, $fixer->getPriority());
}, $this->fixers);
usort($data, function (array $a, array $b) {
return Utils::cmpInt($b[1], $a[1]);
});
$this->fixers = array_map(function (array $item) {
return $item[0];
}, $data);
return $this;
}
/**
* @dataProvider provideCmpIntCases
*/
public function testCmpInt($expected, $left, $right)
{
$this->assertSame($expected, Utils::cmpInt($left, $right));
}
/**
* Get the delimiter that would require the least escaping in a regular expression.
*
* @param string $pattern the regular expression
*
* @return string the preg delimiter
*/
private function getBestDelimiter($pattern)
{
// try do find something that's not used
$delimiters = array();
foreach (self::$delimiters as $k => $d) {
if (false === strpos($pattern, $d)) {
return $d;
}
$delimiters[$d] = array(substr_count($pattern, $d), $k);
}
// return the least used delimiter, using the position in the list as a tie breaker
uasort($delimiters, function ($a, $b) {
if ($a[0] === $b[0]) {
return Utils::cmpInt($a, $b);
}
return $a[0] < $b[0] ? -1 : 1;
});
return key($delimiters);
}
