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localcache.ts

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import { ICache } from '@api/abstract/abstract.cache';

import { CacheConf, CacheConfLocal, ConfigService } from '@config/env.config';

import { Logger } from '@config/logger.config';

import { BufferJSON } from 'baileys';

import NodeCache from 'node-cache';

export class LocalCache implements ICache {

private readonly logger = new Logger('LocalCache');

private conf: CacheConfLocal;

static localCache = new NodeCache();

constructor(

private readonly configService: ConfigService,

private readonly module: string,

) {

this.conf = this.configService.get<CacheConf>('CACHE')?.LOCAL;

}

async get(key: string): Promise<any> {

return LocalCache.localCache.get(this.buildKey(key));

}

async set(key: string, value: any, ttl?: number) {

return LocalCache.localCache.set(this.buildKey(key), value, ttl || this.conf.TTL);

}

async has(key: string) {

return LocalCache.localCache.has(this.buildKey(key));

}

async delete(key: string) {

return LocalCache.localCache.del(this.buildKey(key));

}

async deleteAll(appendCriteria?: string) {

const keys = await this.keys(appendCriteria);

if (!keys?.length) {

return 0;

}

return LocalCache.localCache.del(keys);

}

async keys(appendCriteria?: string) {

const filter = `${this.buildKey('')}${appendCriteria ? `${appendCriteria}:` : ''}`;

return LocalCache.localCache.keys().filter((key) => key.substring(0, filter.length) === filter);

}

buildKey(key: string) {

return `${this.module}:${key}`;

}

async hGet(key: string, field: string) {

try {

const data = LocalCache.localCache.get(this.buildKey(key)) as object;

if (data && field in data) {

return JSON.parse(data[field], BufferJSON.reviver);

}

return null;

} catch (error) {

this.logger.error(error);

}

}

async hSet(key: string, field: string, value: any) {

try {

const json = JSON.stringify(value, BufferJSON.replacer);

let hash = LocalCache.localCache.get(this.buildKey(key));

if (!hash) {

hash = {};

}

hash[field] = json;

LocalCache.localCache.set(this.buildKey(key), hash);

} catch (error) {

this.logger.error(error);

}

}

async hDelete(key: string, field: string) {

try {

const data = LocalCache.localCache.get(this.buildKey(key)) as object;

if (data && field in data) {

delete data[field];

LocalCache.localCache.set(this.buildKey(key), data);

return 1;

}

return 0;

} catch (error) {

this.logger.error(error);

}

}

}