54 lines
1.8 KiB
TypeScript
54 lines
1.8 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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import type {IVirusHashCache} from '@fluxer/virus_scan/src/cache/IVirusHashCache';
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import type {IVirusScanCacheStore} from '@fluxer/virus_scan/src/cache/IVirusScanCacheStore';
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import {seconds} from 'itty-time';
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export interface VirusHashCacheConfig {
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keyPrefix?: string;
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ttlSeconds?: number;
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}
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export class VirusHashCache implements IVirusHashCache {
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private readonly keyPrefix: string;
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private readonly ttlSeconds: number;
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constructor(
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private cacheStore: IVirusScanCacheStore,
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config: VirusHashCacheConfig = {},
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) {
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this.keyPrefix = config.keyPrefix ?? 'virus';
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this.ttlSeconds = config.ttlSeconds ?? seconds('7 days');
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}
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async isKnownVirusHash(fileHash: string): Promise<boolean> {
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const cachedValue = await this.cacheStore.get(this.buildCacheKey(fileHash));
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return cachedValue != null;
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}
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async cacheVirusHash(fileHash: string): Promise<void> {
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await this.cacheStore.set(this.buildCacheKey(fileHash), 'true', this.ttlSeconds);
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}
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private buildCacheKey(fileHash: string): string {
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return `${this.keyPrefix}:${fileHash}`;
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}
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}
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