74 lines
3.0 KiB
JavaScript
74 lines
3.0 KiB
JavaScript
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import merge from './util/merge';
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import assertString from './util/assertString';
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function currencyRegex(options) {
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var decimal_digits = "\\d{".concat(options.digits_after_decimal[0], "}");
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options.digits_after_decimal.forEach(function (digit, index) {
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if (index !== 0) decimal_digits = "".concat(decimal_digits, "|\\d{").concat(digit, "}");
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});
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var symbol = "(".concat(options.symbol.replace(/\W/, function (m) {
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return "\\".concat(m);
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}), ")").concat(options.require_symbol ? '' : '?'),
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negative = '-?',
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whole_dollar_amount_without_sep = '[1-9]\\d*',
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whole_dollar_amount_with_sep = "[1-9]\\d{0,2}(\\".concat(options.thousands_separator, "\\d{3})*"),
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valid_whole_dollar_amounts = ['0', whole_dollar_amount_without_sep, whole_dollar_amount_with_sep],
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whole_dollar_amount = "(".concat(valid_whole_dollar_amounts.join('|'), ")?"),
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decimal_amount = "(\\".concat(options.decimal_separator, "(").concat(decimal_digits, "))").concat(options.require_decimal ? '' : '?');
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var pattern = whole_dollar_amount + (options.allow_decimal || options.require_decimal ? decimal_amount : '');
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// default is negative sign before symbol, but there are two other options (besides parens)
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if (options.allow_negatives && !options.parens_for_negatives) {
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if (options.negative_sign_after_digits) {
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pattern += negative;
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} else if (options.negative_sign_before_digits) {
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pattern = negative + pattern;
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}
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}
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// South African Rand, for example, uses R 123 (space) and R-123 (no space)
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if (options.allow_negative_sign_placeholder) {
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pattern = "( (?!\\-))?".concat(pattern);
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} else if (options.allow_space_after_symbol) {
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pattern = " ?".concat(pattern);
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} else if (options.allow_space_after_digits) {
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pattern += '( (?!$))?';
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}
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if (options.symbol_after_digits) {
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pattern += symbol;
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} else {
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pattern = symbol + pattern;
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}
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if (options.allow_negatives) {
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if (options.parens_for_negatives) {
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pattern = "(\\(".concat(pattern, "\\)|").concat(pattern, ")");
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} else if (!(options.negative_sign_before_digits || options.negative_sign_after_digits)) {
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pattern = negative + pattern;
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}
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}
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// ensure there's a dollar and/or decimal amount, and that
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// it doesn't start with a space or a negative sign followed by a space
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return new RegExp("^(?!-? )(?=.*\\d)".concat(pattern, "$"));
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}
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var default_currency_options = {
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symbol: '$',
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require_symbol: false,
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allow_space_after_symbol: false,
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symbol_after_digits: false,
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allow_negatives: true,
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parens_for_negatives: false,
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negative_sign_before_digits: false,
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negative_sign_after_digits: false,
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allow_negative_sign_placeholder: false,
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thousands_separator: ',',
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decimal_separator: '.',
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allow_decimal: true,
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require_decimal: false,
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digits_after_decimal: [2],
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allow_space_after_digits: false
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};
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export default function isCurrency(str, options) {
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assertString(str);
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options = merge(options, default_currency_options);
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return currencyRegex(options).test(str);
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}
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