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<?php
namespace CommerceGuys\Intl\Formatter;
use CommerceGuys\Intl\Calculator;
use CommerceGuys\Intl\Exception\InvalidArgumentException;
use CommerceGuys\Intl\NumberFormat\NumberFormat;
use CommerceGuys\Intl\NumberFormat\NumberFormatRepositoryInterface;
/**
* Formats numbers using locale-specific patterns.
*/
class NumberFormatter implements NumberFormatterInterface
{
use FormatterTrait;
/**
* The number format repository.
*
* @var NumberFormatRepositoryInterface
*/
protected $numberFormatRepository;
/**
* The default options.
*
* @var array
*/
protected $defaultOptions = [
'locale' => 'en',
'use_grouping' => true,
'minimum_fraction_digits' => 0,
'maximum_fraction_digits' => 3,
'rounding_mode' => PHP_ROUND_HALF_UP,
'style' => 'decimal',
];
/**
* The loaded number formats.
*
* @var NumberFormat[]
*/
protected $numberFormats = [];
/**
* Creates a NumberFormatter instance.
*
* @param NumberFormatRepositoryInterface $numberFormatRepository The number format repository.
* @param array $defaultOptions The default options.
*
* @throws \InvalidArgumentException
* @throws \RuntimeException
*/
public function __construct(NumberFormatRepositoryInterface $numberFormatRepository, array $defaultOptions = [])
{
if (!extension_loaded('bcmath')) {
throw new \RuntimeException('The bcmath extension is required by NumberFormatter.');
}
$this->validateOptions($defaultOptions);
$this->numberFormatRepository = $numberFormatRepository;
$this->defaultOptions = array_replace($this->defaultOptions, $defaultOptions);
}
/**
* {@inheritdoc}
*/
public function format($number, array $options = [])
{
if (!is_numeric($number)) {
$message = sprintf('The provided value "%s" is not a valid number or numeric string.', $number);
throw new InvalidArgumentException($message);
}
$this->validateOptions($options);
$options = array_replace($this->defaultOptions, $options);
$number = (string) $number;
// Percentages are passed as decimals (e.g. 0.2 for 20%).
if ($options['style'] == 'percent') {
$number = Calculator::multiply($number, '100');
}
$numberFormat = $this->getNumberFormat($options['locale']);
$number = $this->formatNumber($number, $numberFormat, $options);
return $number;
}
/**
* {@inheritdoc}
*/
public function parse($number, array $options = [])
{
$this->validateOptions($options);
$options = array_replace($this->defaultOptions, $options);
$numberFormat = $this->getNumberFormat($options['locale']);
$number = $this->parseNumber($number, $numberFormat);
return $number;
}
/**
* Gets the number format for the provided locale.
*
* @param string $locale The locale.
*
* @return NumberFormat
*/
protected function getNumberFormat($locale)
{
if (!isset($this->numberFormats[$locale])) {
$this->numberFormats[$locale] = $this->numberFormatRepository->get($locale);
}
return $this->numberFormats[$locale];
}
/**
* {@inheritdoc}
*/
protected function getAvailablePatterns(NumberFormat $numberFormat)
{
return [
'decimal' => $numberFormat->getDecimalPattern(),
'percent' => $numberFormat->getPercentPattern(),
];
}
/**
* Validates the provided options.
*
* Ensures the absence of unknown keys, correct data types and values.
*
* @param array $options The options.
*
* @throws \InvalidArgumentException
*/
protected function validateOptions(array $options)
{
foreach ($options as $option => $value) {
if (!array_key_exists($option, $this->defaultOptions)) {
throw new InvalidArgumentException(sprintf('Unrecognized option "%s".', $option));
}
}
if (isset($options['use_grouping']) && !is_bool($options['use_grouping'])) {
throw new InvalidArgumentException('The option "use_grouping" must be a boolean.');
}
foreach (['minimum_fraction_digits', 'maximum_fraction_digits'] as $option) {
if (array_key_exists($option, $options) && !is_numeric($options[$option])) {
throw new InvalidArgumentException(sprintf('The option "%s" must be numeric.', $option));
}
}
$roundingModes = [
PHP_ROUND_HALF_UP, PHP_ROUND_HALF_DOWN,
PHP_ROUND_HALF_EVEN, PHP_ROUND_HALF_ODD, 'none',
];
if (!empty($options['rounding_mode']) && !in_array($options['rounding_mode'], $roundingModes)) {
throw new InvalidArgumentException(sprintf('Unrecognized rounding mode "%s".', $options['rounding_mode']));
}
if (!empty($options['style']) && !in_array($options['style'], ['decimal', 'percent'])) {
throw new InvalidArgumentException(sprintf('Unrecognized style "%s".', $options['style']));
}
}
}
|
