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fix(frontend): 2月29日を誕生日に設定している場合、平年は3月1日を誕生日として扱うように (#17072)
* fix(frontend): 2月29日を誕生日に設定している場合、平年は3月1日を誕生日として扱うように * Update Changelog * add tests * spdx
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28
packages/frontend/src/utility/is-birthday.ts
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28
packages/frontend/src/utility/is-birthday.ts
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/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import * as Misskey from 'misskey-js';
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export function isBirthday(user: Misskey.entities.UserDetailed, now = new Date()): boolean {
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if (user.birthday == null) return false;
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const [_, bm, bd] = user.birthday.split('-').map((v) => parseInt(v, 10));
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if (isNaN(bm) || isNaN(bd)) return false;
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const y = now.getFullYear();
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const m = now.getMonth() + 1;
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const d = now.getDate();
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// 閏日生まれで平年の場合は3月1日を誕生日として扱う
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if (bm === 2 && bd === 29 && m === 3 && d === 1 && !isLeapYear(y)) {
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return true;
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}
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return m === bm && d === bd;
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}
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function isLeapYear(year: number): boolean {
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return (year % 4 === 0 && year % 100 !== 0) || (year % 400 === 0);
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}
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