currencies-exchange-rates/lib/services/cache-service.js

currencies-exchange-rates

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _nodeCache = _interopRequireDefault(require("node-cache"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class CacheService {
  constructor(ttlSeconds) {
    this.cache = new _nodeCache.default({
      stdTTL: ttlSeconds,
      checkperiod: ttlSeconds * 0.2,
      useClones: false
    });
  }

  get(key, fetchData) {
    const value = this.cache.get(key);

    if (value) {
      return Promise.resolve(value);
    }

    if (!fetchData) {
      return undefined;
    }

    return fetchData().then(result => {
      this.cache.set(key, result);
      return result;
    });
  }

  del(keys) {
    this.cache.del(keys);
  }

  flush() {
    this.cache.flushAll();
  }

}

var _default = CacheService;
exports.default = _default;
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