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31 lines
1.2 KiB
31 lines
1.2 KiB
import * as NodeCache from 'node-cache';
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import { Cache, ExpirationStrategy, MemoryStorage } from '@hokify/node-ts-cache';
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import { IAuthentication } from './types/Authentication';
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const cacheStrategy = new ExpirationStrategy(new MemoryStorage());
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/**
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* this is just a simple abstraction to provide
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* an application layer for caching credentials
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*/
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export class Authentication implements IAuthentication {
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cache = new NodeCache();
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constructor(private authenticator: IAuthentication) {}
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@Cache(cacheStrategy, { ttl: 60000 })
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async authenticate(username: string, password: string): Promise<boolean> {
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const cacheKey = `usr:${username}|pwd:${password}`;
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const fromCache = this.cache.get(cacheKey) as undefined | boolean;
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if (fromCache !== undefined) {
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console.log(`Cached Auth Result for user ${username}`, fromCache ? 'SUCCESS' : 'Failure');
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return fromCache;
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}
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const authResult = await this.authenticator.authenticate(username, password);
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console.log(`Auth Result for user ${username}`, authResult ? 'SUCCESS' : 'Failure');
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this.cache.set(cacheKey, authResult, authResult ? 86400 : 60); // cache for one day on success, otherwise just for 60 seconds
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return authResult;
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}
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}
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