feat(cacheservice): add suport to use use redis in cacheservice

src/libs/cacheengine.ts

@@ -0,0 +1,22 @@
+import { CacheConf, ConfigService } from '../config/env.config';
+import { ICache } from '../whatsapp/abstract/abstract.cache';
+import { LocalCache } from './localcache';
+import { RedisCache } from './rediscache';
+
+export class CacheEngine {
+  private engine: ICache;
+
+  constructor(private readonly configService: ConfigService, module: string) {
+    const cacheConf = configService.get<CacheConf>('CACHE');
+
+    if (cacheConf?.REDIS?.ENABLED && cacheConf?.REDIS?.URI !== '') {
+      this.engine = new RedisCache(configService, module);
+    } else if (cacheConf?.LOCAL?.ENABLED) {
+      this.engine = new LocalCache(configService, module);
+    }
+  }
+
+  public getEngine() {
+    return this.engine;
+  }
+}

src/libs/localcache.ts

@@ -0,0 +1,48 @@
+import NodeCache from 'node-cache';
+
+import { CacheConf, CacheConfLocal, ConfigService } from '../config/env.config';
+import { ICache } from '../whatsapp/abstract/abstract.cache';
+
+export class LocalCache implements ICache {
+  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}`;
+  }
+}

src/libs/rediscache.client.ts

@@ -0,0 +1,59 @@
+import { createClient, RedisClientType } from 'redis';
+
+import { CacheConf, CacheConfRedis, configService } from '../config/env.config';
+import { Logger } from '../config/logger.config';
+
+class Redis {
+  private logger = new Logger(Redis.name);
+  private client: RedisClientType = null;
+  private conf: CacheConfRedis;
+  private connected = false;
+
+  constructor() {
+    this.conf = configService.get<CacheConf>('CACHE')?.REDIS;
+  }
+
+  getConnection(): RedisClientType {
+    if (this.connected) {
+      return this.client;
+    } else {
+      this.client = createClient({
+        url: this.conf.URI,
+      });
+
+      this.client.on('connect', () => {
+        this.logger.verbose('redis connecting');
+      });
+
+      this.client.on('ready', () => {
+        this.logger.verbose('redis ready');
+        this.connected = true;
+      });
+
+      this.client.on('error', () => {
+        this.logger.error('redis disconnected');
+        this.connected = false;
+      });
+
+      this.client.on('end', () => {
+        this.logger.verbose('redis connection ended');
+        this.connected = false;
+      });
+
+      try {
+        this.logger.verbose('connecting new redis client');
+        this.client.connect();
+        this.connected = true;
+        this.logger.verbose('connected to new redis client');
+      } catch (e) {
+        this.connected = false;
+        this.logger.error('redis connect exception caught: ' + e);
+        return null;
+      }
+
+      return this.client;
+    }
+  }
+}
+
+export const redisClient = new Redis();

src/libs/rediscache.ts

@@ -0,0 +1,83 @@
+import { RedisClientType } from 'redis';
+
+import { CacheConf, CacheConfRedis, ConfigService } from '../config/env.config';
+import { Logger } from '../config/logger.config';
+import { ICache } from '../whatsapp/abstract/abstract.cache';
+import { redisClient } from './rediscache.client';
+
+export class RedisCache implements ICache {
+  private readonly logger = new Logger(RedisCache.name);
+  private client: RedisClientType;
+  private conf: CacheConfRedis;
+
+  constructor(private readonly configService: ConfigService, private readonly module: string) {
+    this.conf = this.configService.get<CacheConf>('CACHE')?.REDIS;
+    this.client = redisClient.getConnection();
+  }
+
+  async get(key: string): Promise<any> {
+    try {
+      return JSON.parse(await this.client.get(this.buildKey(key)));
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  async set(key: string, value: any, ttl?: number) {
+    try {
+      await this.client.setEx(this.buildKey(key), ttl || this.conf?.TTL, JSON.stringify(value));
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  async has(key: string) {
+    try {
+      return (await this.client.exists(this.buildKey(key))) > 0;
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  async delete(key: string) {
+    try {
+      return await this.client.del(this.buildKey(key));
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  async deleteAll(appendCriteria?: string) {
+    try {
+      const keys = await this.keys(appendCriteria);
+      if (!keys?.length) {
+        return 0;
+      }
+
+      return await this.client.del(keys);
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  async keys(appendCriteria?: string) {
+    try {
+      const match = `${this.buildKey('')}${appendCriteria ? `${appendCriteria}:` : ''}*`;
+      const keys = [];
+      for await (const key of this.client.scanIterator({
+        MATCH: match,
+        COUNT: 100,
+      })) {
+        keys.push(key);
+      }
+
+      return [...new Set(keys)];
+    } catch (error) {
+      this.logger.error(error);
+    }
+  }
+
+  buildKey(key: string) {
+    return `${this.conf?.PREFIX_KEY}:${this.module}:${key}`;
+  }
+}