70 lines
1.9 KiB
TypeScript
70 lines
1.9 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and other misskey contributors
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import { AhoCorasick } from 'slacc';
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import RE2 from 're2';
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import type { MiNote } from '@/models/Note.js';
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import type { MiUser } from '@/models/User.js';
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type NoteLike = {
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userId: MiNote['userId'];
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text: MiNote['text'];
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cw?: MiNote['cw'];
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};
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type UserLike = {
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id: MiUser['id'];
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};
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const acCache = new Map<string, AhoCorasick>();
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export async function checkWordMute(note: NoteLike, me: UserLike | null | undefined, mutedWords: Array<string | string[]>): Promise<boolean> {
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// 自分自身
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if (me && (note.userId === me.id)) return false;
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if (mutedWords.length > 0) {
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const text = ((note.cw ?? '') + '\n' + (note.text ?? '')).trim();
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if (text === '') return false;
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const acable = mutedWords.filter(filter => Array.isArray(filter) && filter.length === 1).map(filter => filter[0]).sort();
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const unacable = mutedWords.filter(filter => !Array.isArray(filter) || filter.length !== 1);
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const acCacheKey = acable.join('\n');
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const ac = acCache.get(acCacheKey) ?? AhoCorasick.withPatterns(acable);
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acCache.delete(acCacheKey);
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for (const obsoleteKeys of acCache.keys()) {
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if (acCache.size > 1000) {
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acCache.delete(obsoleteKeys);
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}
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}
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acCache.set(acCacheKey, ac);
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if (ac.isMatch(text)) {
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return true;
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}
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const matched = unacable.some(filter => {
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if (Array.isArray(filter)) {
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return filter.every(keyword => text.includes(keyword));
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} else {
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// represents RegExp
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const regexp = filter.match(/^\/(.+)\/(.*)$/);
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// This should never happen due to input sanitisation.
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if (!regexp) return false;
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try {
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return new RE2(regexp[1], regexp[2]).test(text);
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} catch (err) {
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// This should never happen due to input sanitisation.
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return false;
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}
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}
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});
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if (matched) return true;
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}
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return false;
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}
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