37 lines
1.2 KiB
TypeScript
37 lines
1.2 KiB
TypeScript
import { BadRequestException } from '@nestjs/common';
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export const MONEY_UNITS_PER_YUAN = 10_000;
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export function moneyToNumber(value: number | bigint | null | undefined) {
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if (value === null || value === undefined) return 0;
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const result = typeof value === 'bigint' ? Number(value) : value;
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if (!Number.isSafeInteger(result)) {
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throw new RangeError('金额超过 JavaScript 安全整数范围');
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}
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return result;
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}
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export function moneyUnitsToYuan(value: number | bigint | null | undefined) {
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return moneyToNumber(value) / MONEY_UNITS_PER_YUAN;
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}
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export function moneyUnitsToFixedYuan(value: number | bigint | null | undefined) {
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return moneyUnitsToYuan(value).toFixed(4);
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}
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export function assertMoneyUnits(
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value: number,
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label: string,
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options: { allowNegative?: boolean; allowZero?: boolean } = {},
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) {
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if (!Number.isSafeInteger(value)) {
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throw new BadRequestException(`${label}最多支持人民币小数点后 4 位，且不能超过安全金额范围`);
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}
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if (!options.allowNegative && value < 0) {
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throw new BadRequestException(`${label}不能为负数`);
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}
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if (options.allowZero === false && value === 0) {
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throw new BadRequestException(`${label}不能为 0`);
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}
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}
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