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DecimalMoneyParser.php
101 lines
| 1 | <?php |
| 2 | |
| 3 | namespace Money\Parser; |
| 4 | |
| 5 | use Money\Currencies; |
| 6 | use Money\Currency; |
| 7 | use Money\Exception\ParserException; |
| 8 | use Money\Money; |
| 9 | use Money\MoneyParser; |
| 10 | use Money\Number; |
| 11 | |
| 12 | /** |
| 13 | * Parses a decimal string into a Money object. |
| 14 | * |
| 15 | * @author Teoh Han Hui <teohhanhui@gmail.com> |
| 16 | */ |
| 17 | final class DecimalMoneyParser implements MoneyParser |
| 18 | { |
| 19 | const DECIMAL_PATTERN = '/^(?P<sign>-)?(?P<digits>0|[1-9]\d*)?\.?(?P<fraction>\d+)?$/'; |
| 20 | |
| 21 | /** |
| 22 | * @var Currencies |
| 23 | */ |
| 24 | private $currencies; |
| 25 | |
| 26 | public function __construct(Currencies $currencies) |
| 27 | { |
| 28 | $this->currencies = $currencies; |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * {@inheritdoc} |
| 33 | */ |
| 34 | public function parse($money, $forceCurrency = null) |
| 35 | { |
| 36 | if (!is_string($money)) { |
| 37 | throw new ParserException('Formatted raw money should be string, e.g. 1.00'); |
| 38 | } |
| 39 | |
| 40 | if (null === $forceCurrency) { |
| 41 | throw new ParserException('DecimalMoneyParser cannot parse currency symbols. Use forceCurrency argument'); |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * This conversion is only required whilst currency can be either a string or a |
| 46 | * Currency object. |
| 47 | */ |
| 48 | $currency = $forceCurrency; |
| 49 | if (!$currency instanceof Currency) { |
| 50 | @trigger_error('Passing a currency as string is deprecated since 3.1 and will be removed in 4.0. Please pass a '.Currency::class.' instance instead.', E_USER_DEPRECATED); |
| 51 | $currency = new Currency($currency); |
| 52 | } |
| 53 | |
| 54 | $decimal = trim($money); |
| 55 | |
| 56 | if ($decimal === '') { |
| 57 | return new Money(0, $currency); |
| 58 | } |
| 59 | |
| 60 | $subunit = $this->currencies->subunitFor($currency); |
| 61 | |
| 62 | if (!preg_match(self::DECIMAL_PATTERN, $decimal, $matches) || !isset($matches['digits'])) { |
| 63 | throw new ParserException(sprintf('Cannot parse "%s" to Money.', $decimal)); |
| 64 | } |
| 65 | |
| 66 | $negative = isset($matches['sign']) && $matches['sign'] === '-'; |
| 67 | |
| 68 | $decimal = $matches['digits']; |
| 69 | |
| 70 | if ($negative) { |
| 71 | $decimal = '-'.$decimal; |
| 72 | } |
| 73 | |
| 74 | if (isset($matches['fraction'])) { |
| 75 | $fractionDigits = strlen($matches['fraction']); |
| 76 | $decimal .= $matches['fraction']; |
| 77 | $decimal = Number::roundMoneyValue($decimal, $subunit, $fractionDigits); |
| 78 | |
| 79 | if ($fractionDigits > $subunit) { |
| 80 | $decimal = substr($decimal, 0, $subunit - $fractionDigits); |
| 81 | } elseif ($fractionDigits < $subunit) { |
| 82 | $decimal .= str_pad('', $subunit - $fractionDigits, '0'); |
| 83 | } |
| 84 | } else { |
| 85 | $decimal .= str_pad('', $subunit, '0'); |
| 86 | } |
| 87 | |
| 88 | if ($negative) { |
| 89 | $decimal = '-'.ltrim(substr($decimal, 1), '0'); |
| 90 | } else { |
| 91 | $decimal = ltrim($decimal, '0'); |
| 92 | } |
| 93 | |
| 94 | if ($decimal === '' || $decimal === '-') { |
| 95 | $decimal = '0'; |
| 96 | } |
| 97 | |
| 98 | return new Money($decimal, $currency); |
| 99 | } |
| 100 | } |
| 101 |