44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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const numberFormatterCache = new Map<string, Intl.NumberFormat>();
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export function getNumberFormatter(
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locale: string,
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numberFormatOptions: Intl.NumberFormatOptions = {},
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): Intl.NumberFormat {
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const cacheKey = buildFormatterCacheKey(locale, numberFormatOptions);
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const cachedFormatter = numberFormatterCache.get(cacheKey);
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if (cachedFormatter !== undefined) {
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return cachedFormatter;
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}
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const formatter = new Intl.NumberFormat(locale, numberFormatOptions);
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numberFormatterCache.set(cacheKey, formatter);
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return formatter;
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}
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function buildFormatterCacheKey(locale: string, numberFormatOptions: Intl.NumberFormatOptions): string {
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const optionEntries = Object.entries(numberFormatOptions)
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.filter(([, value]) => value !== undefined)
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.sort(([left], [right]) => left.localeCompare(right));
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const optionKey = optionEntries.map(([key, value]) => `${key}:${String(value)}`).join('|');
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return `${locale}|${optionKey}`;
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}
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