53 lines
1.7 KiB
TypeScript
53 lines
1.7 KiB
TypeScript
/*
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* Copyright (c) 2023 Huawei Technologies Co.,Ltd.
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*
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* openInula is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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*
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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import utils from '../../utils/utils';
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import {Locale, SelectPool} from '../../types/types';
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import { I18nCache } from '../../types/interfaces';
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/**
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* 规则选择器
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* eg : 输入选择语句 female {She} other {They}} ，表示'female'和'other'是两种可能的值，它们分别对应着'She'和'They'两个输出结果。
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* 如果调用select（{ value: 'female' }）则表示，输出 she
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*/
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class SelectFormatter {
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private readonly locale: Locale;
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private readonly cache: I18nCache;
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constructor(locale: Locale, cache: I18nCache) {
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this.locale = locale;
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this.cache = cache;
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}
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getRule(value: SelectPool, rules: any) {
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if (this.cache.select) {
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// 创建key，用于唯一标识
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const cacheKey = utils.generateKey<Intl.NumberFormatOptions>(this.locale, rules);
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// 如果key存在，则使用缓存中的替代
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if (this.cache.select[cacheKey]) {
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return this.cache.select[cacheKey][value] || this.cache.select[cacheKey].other;
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}
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// 如果不存在，则进行缓存
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this.cache.select[cacheKey] = rules;
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}
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return rules[value] || rules.other;
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}
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}
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export default SelectFormatter;
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