71 lines
2.3 KiB
TypeScript
71 lines
2.3 KiB
TypeScript
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/*
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This file is part of GNU Taler
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(C) 2021 Taler Systems S.A.
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GNU Taler is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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import { amountFractionalBase, AmountJson, Amounts } from "@gnu-taler/taler-util";
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import { MerchantBackend } from "../declaration";
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/**
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* sums two prices,
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* @param one
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* @param two
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* @returns
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*/
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const sumPrices = (one: string, two: string) => {
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const [currency, valueOne] = one.split(':')
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const [, valueTwo] = two.split(':')
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return `${currency}:${parseInt(valueOne, 10) + parseInt(valueTwo, 10)}`
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}
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/**
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* merge refund with the same description and a difference less than one minute
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* @param prev list of refunds that will hold the merged refunds
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* @param cur new refund to add to the list
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* @returns list with the new refund, may be merged with the last
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*/
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export function mergeRefunds(prev: MerchantBackend.Orders.RefundDetails[], cur: MerchantBackend.Orders.RefundDetails) {
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let tail;
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if (prev.length === 0 || //empty list
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cur.timestamp.t_s === 'never' || //current doesnt have timestamp
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(tail = prev[prev.length - 1]).timestamp.t_s === 'never' || // last doesnt have timestamp
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cur.reason !== tail.reason || //different reason
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cur.pending !== tail.pending || //different pending state
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Math.abs(cur.timestamp.t_s - tail.timestamp.t_s) > 1000 * 60) {//more than 1 minute difference
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prev.push(cur)
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return prev
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}
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prev[prev.length - 1] = {
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...tail,
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amount: sumPrices(tail.amount, cur.amount)
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}
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return prev
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}
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export const rate = (one: string, two: string) => {
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const a = Amounts.parseOrThrow(one)
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const b = Amounts.parseOrThrow(two)
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const af = toFloat(a)
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const bf = toFloat(b)
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if (bf === 0) return 0
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return af / bf
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}
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function toFloat(amount: AmountJson) {
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return amount.value + (amount.fraction / amountFractionalBase);
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}
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