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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form\Extension\Core\DataTransformer;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Symfony\Component\Form\Exception\UnexpectedTypeException;
/**
* Transforms between a normalized format (integer or float) and a percentage value.
*
* @author Bernhard Schussek <bschussek@gmail.com>
* @author Florian Eckerstorfer <florian@eckerstorfer.org>
*/
class PercentToLocalizedStringTransformer implements DataTransformerInterface
{
const FRACTIONAL = 'fractional';
const INTEGER = 'integer';
protected static $types = [
self::FRACTIONAL,
self::INTEGER,
];
private $type;
private $scale;
/**
* @see self::$types for a list of supported types
*
* @param int $scale The scale
* @param string $type One of the supported types
*
* @throws UnexpectedTypeException if the given value of type is unknown
*/
public function __construct(int $scale = null, string $type = null)
{
if (null === $scale) {
$scale = 0;
}
if (null === $type) {
$type = self::FRACTIONAL;
}
if (!\in_array($type, self::$types, true)) {
throw new UnexpectedTypeException($type, implode('", "', self::$types));
}
$this->type = $type;
$this->scale = $scale;
}
/**
* Transforms between a normalized format (integer or float) into a percentage value.
*
* @param int|float $value Normalized value
*
* @return string Percentage value
*
* @throws TransformationFailedException if the given value is not numeric or
* if the value could not be transformed
*/
public function transform($value)
{
if (null === $value) {
return '';
}
if (!is_numeric($value)) {
throw new TransformationFailedException('Expected a numeric.');
}
if (self::FRACTIONAL == $this->type) {
$value *= 100;
}
$formatter = $this->getNumberFormatter();
$value = $formatter->format($value);
if (intl_is_failure($formatter->getErrorCode())) {
throw new TransformationFailedException($formatter->getErrorMessage());
}
// replace the UTF-8 non break spaces
return $value;
}
/**
* Transforms between a percentage value into a normalized format (integer or float).
*
* @param string $value Percentage value
*
* @return int|float Normalized value
*
* @throws TransformationFailedException if the given value is not a string or
* if the value could not be transformed
*/
public function reverseTransform($value)
{
if (!\is_string($value)) {
throw new TransformationFailedException('Expected a string.');
}
if ('' === $value) {
return;
}
$position = 0;
$formatter = $this->getNumberFormatter();
$groupSep = $formatter->getSymbol(\NumberFormatter::GROUPING_SEPARATOR_SYMBOL);
$decSep = $formatter->getSymbol(\NumberFormatter::DECIMAL_SEPARATOR_SYMBOL);
$grouping = $formatter->getAttribute(\NumberFormatter::GROUPING_USED);
if ('.' !== $decSep && (!$grouping || '.' !== $groupSep)) {
$value = str_replace('.', $decSep, $value);
}
if (',' !== $decSep && (!$grouping || ',' !== $groupSep)) {
$value = str_replace(',', $decSep, $value);
}
if (false !== strpos($value, $decSep)) {
$type = \NumberFormatter::TYPE_DOUBLE;
} else {
$type = \PHP_INT_SIZE === 8 ? \NumberFormatter::TYPE_INT64 : \NumberFormatter::TYPE_INT32;
}
// replace normal spaces so that the formatter can read them
$result = $formatter->parse(str_replace(' ', "\xc2\xa0", $value), $type, $position);
if (intl_is_failure($formatter->getErrorCode())) {
throw new TransformationFailedException($formatter->getErrorMessage());
}
if (self::FRACTIONAL == $this->type) {
$result /= 100;
}
if (\function_exists('mb_detect_encoding') && false !== $encoding = mb_detect_encoding($value, null, true)) {
$length = mb_strlen($value, $encoding);
$remainder = mb_substr($value, $position, $length, $encoding);
} else {
$length = \strlen($value);
$remainder = substr($value, $position, $length);
}
// After parsing, position holds the index of the character where the
// parsing stopped
if ($position < $length) {
// Check if there are unrecognized characters at the end of the
// number (excluding whitespace characters)
$remainder = trim($remainder, " \t\n\r\0\x0b\xc2\xa0");
if ('' !== $remainder) {
throw new TransformationFailedException(sprintf('The number contains unrecognized characters: "%s"', $remainder));
}
}
return $result;
}
/**
* Returns a preconfigured \NumberFormatter instance.
*
* @return \NumberFormatter
*/
protected function getNumberFormatter()
{
$formatter = new \NumberFormatter(\Locale::getDefault(), \NumberFormatter::DECIMAL);
$formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $this->scale);
return $formatter;
}
}
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