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Merge pull request #103 from sharetribe/update-v6.0.0-from-upstream
Update v6.0.0 from upstream
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| const Decimal = require('decimal.js'); | ||
| const has = require('lodash/has'); | ||
| const { types } = require('sharetribe-flex-sdk'); | ||
| const { Money } = types; | ||
|
|
||
| /** Helper functions for handling currency */ | ||
|
|
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| // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER | ||
| // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Number/MIN_SAFE_INTEGER | ||
| // https://stackoverflow.com/questions/26380364/why-is-number-max-safe-integer-9-007-199-254-740-991-and-not-9-007-199-254-740-9 | ||
| const MIN_SAFE_INTEGER = Number.MIN_SAFE_INTEGER || -1 * (2 ** 53 - 1); | ||
| const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER || 2 ** 53 - 1; | ||
|
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||
| const isSafeNumber = decimalValue => { | ||
| if (!(decimalValue instanceof Decimal)) { | ||
| throw new Error('Value must be a Decimal'); | ||
| } | ||
| return decimalValue.gte(MIN_SAFE_INTEGER) && decimalValue.lte(MAX_SAFE_INTEGER); | ||
| }; | ||
|
|
||
| // See: https://en.wikipedia.org/wiki/ISO_4217 | ||
| // See: https://stripe.com/docs/currencies | ||
| const subUnitDivisors = { | ||
| AUD: 100, | ||
| CAD: 100, | ||
| CHF: 100, | ||
| CNY: 100, | ||
| DKK: 100, | ||
| EUR: 100, | ||
| GBP: 100, | ||
| HKD: 100, | ||
| INR: 100, | ||
| JPY: 1, | ||
| MXN: 100, | ||
| NOK: 100, | ||
| NZD: 100, | ||
| SEK: 100, | ||
| SGD: 100, | ||
| USD: 100, | ||
| }; | ||
|
|
||
| // Get the minor unit divisor for the given currency | ||
| exports.unitDivisor = currency => { | ||
| if (!has(subUnitDivisors, currency)) { | ||
| throw new Error( | ||
| `No minor unit divisor defined for currency: ${currency} in /server/api-util/currency.js` | ||
| ); | ||
| } | ||
| return subUnitDivisors[currency]; | ||
| }; | ||
|
|
||
| // Divisor can be positive value given as Decimal, Number, or String | ||
| const convertDivisorToDecimal = divisor => { | ||
| try { | ||
| const divisorAsDecimal = new Decimal(divisor); | ||
| if (divisorAsDecimal.isNegative()) { | ||
| throw new Error(`Parameter (${divisor}) must be a positive number.`); | ||
| } | ||
| return divisorAsDecimal; | ||
| } catch (e) { | ||
| throw new Error(`Parameter (${divisor}) must present a number.`, e); | ||
| } | ||
| }; | ||
|
|
||
| // Detect if the given value is a goog.math.Long object | ||
| // See: https://google.github.io/closure-library/api/goog.math.Long.html | ||
| const isGoogleMathLong = value => { | ||
| return typeof value === 'object' && isNumber(value.low_) && isNumber(value.high_); | ||
| }; | ||
|
|
||
| /** | ||
| * Gets subunit amount from Money object and returns it as Decimal. | ||
| * | ||
| * @param {Money} value | ||
| * | ||
| * @return {Number} converted value | ||
| */ | ||
| exports.getAmountAsDecimalJS = value => { | ||
| if (!(value instanceof Money)) { | ||
| throw new Error('Value must be a Money type'); | ||
| } | ||
| let amount; | ||
|
|
||
| if (isGoogleMathLong(value.amount)) { | ||
| // TODO: temporarily also handle goog.math.Long values created by | ||
| // the Transit tooling in the Sharetribe JS SDK. This should be | ||
| // removed when the value.amount will be a proper Decimal type. | ||
|
|
||
| // eslint-disable-next-line no-console | ||
| console.warn('goog.math.Long value in money amount:', value.amount, value.amount.toString()); | ||
|
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| amount = new Decimal(value.amount.toString()); | ||
| } else { | ||
| amount = new Decimal(value.amount); | ||
| } | ||
|
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||
| if (!isSafeNumber(amount)) { | ||
| throw new Error( | ||
| `Cannot represent money minor unit value ${amount.toString()} safely as a number` | ||
| ); | ||
| } | ||
|
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||
| return amount; | ||
| }; | ||
|
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| /** | ||
| * Converts value from DecimalJS to plain JS Number. | ||
| * This also checks that Decimal.js value (for Money/amount) | ||
| * is not too big or small for JavaScript to handle. | ||
| * | ||
| * @param {Decimal} value | ||
| * | ||
| * @return {Number} converted value | ||
| */ | ||
| exports.convertDecimalJSToNumber = decimalValue => { | ||
| if (!isSafeNumber(decimalValue)) { | ||
| throw new Error( | ||
| `Cannot represent Decimal.js value ${decimalValue.toString()} safely as a number` | ||
| ); | ||
| } | ||
|
|
||
| return decimalValue.toNumber(); | ||
| }; |
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