| 1 | import getRate from './lib/get-rate.js';
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| 2 | import parse from './utils/parser.js';
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| 3 | /**
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| 4 | * Function, which converts currencies based on provided rates.
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| 5 | *
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| 6 | * @param {number | string} amount - Amount of money you want to convert.
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| 7 | * @param {Object} options - Conversion options.
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| 8 | * @param {new (value: BigSource) => Big} fn - Optional, Big.js constructor - useful to avoid floating point errors.
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| 9 | * @return {number} Conversion result.
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| 10 | *
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| 11 | * @example
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| 12 | * const rates = {
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| 13 | * GBP: 0.92,
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| 14 | * EUR: 1.00,
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| 15 | * USD: 1.12
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| 16 | * };
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| 17 | *
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| 18 | * convert(10, {from: 'EUR', to: 'GBP', base: 'EUR', rates}); //=> 9.2
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| 19 | */
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| 20 | export default function convert(amount, { from, to, base, rates, BigJs }) {
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| 21 | // If provided `amount` is a string, use parsing
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| 22 | if (typeof amount === 'string') {
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| 23 | const data = parse(amount);
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| 24 | amount = data.amount;
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| 25 | from = data.from ?? from;
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| 26 | to = data.to ?? to;
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| 27 | }
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| 28 | if (BigJs) {
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| 29 | return new BigJs(amount).times(getRate(base, rates, from, to)).toNumber();
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| 30 | }
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| 31 | return (amount * 100) * getRate(base, rates, from, to) / 100;
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| 32 | }
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