@prezly/theme-kit-nextjs/build/adapters/prezly/cache/redis.cjs

Data layer and utility library for developing Prezly themes with NextJS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.createRedisCache = createRedisCache;
var _jsonStableStringify = _interopRequireDefault(require("json-stable-stringify"));
var _redis = require("redis");
var _excluded = ["ttl", "prefix"];
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
function asyncGeneratorStep(n, t, e, r, o, a, c) { try { var i = n[a](c), u = i.value; } catch (n) { return void e(n); } i.done ? t(u) : Promise.resolve(u).then(r, o); }
function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; }
function _objectWithoutProperties(e, t) { if (null == e) return {}; var o, r, i = _objectWithoutPropertiesLoose(e, t); if (Object.getOwnPropertySymbols) { var n = Object.getOwnPropertySymbols(e); for (r = 0; r < n.length; r++) o = n[r], -1 === t.indexOf(o) && {}.propertyIsEnumerable.call(e, o) && (i[o] = e[o]); } return i; }
function _objectWithoutPropertiesLoose(r, e) { if (null == r) return {}; var t = {}; for (var n in r) if ({}.hasOwnProperty.call(r, n)) { if (-1 !== e.indexOf(n)) continue; t[n] = r[n]; } return t; }
var CONNECTIONS = new Map();
function createRedisCache(_ref) {
  var _CONNECTIONS$get;
  var {
      ttl,
      prefix = ''
    } = _ref,
    options = _objectWithoutProperties(_ref, _excluded);
  var connectionKey = (0, _jsonStableStringify.default)(options);
  var connection = (_CONNECTIONS$get = CONNECTIONS.get(connectionKey)) !== null && _CONNECTIONS$get !== void 0 ? _CONNECTIONS$get : (0, _redis.createClient)(options).on('error', error => console.error(error)).connect();
  CONNECTIONS.set(connectionKey, connection);
  function createCache() {
    var namespacePrefix = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
    return {
      get(key, latestVersion) {
        return _asyncToGenerator(function* () {
          var client = yield connection;
          var cached = yield client.get("".concat(namespacePrefix).concat(key));
          if (!cached) {
            return undefined;
          }
          var entry = JSON.parse(cached);
          if (entry.version < latestVersion) {
            // the entry is stale and cannot be used anymore
            return undefined;
          }
          if (ttl) {
            client.expire("".concat(namespacePrefix).concat(key), ttl); // bump TTL on entries access
          }
          return entry.value;
        })();
      },
      set(key, value, version) {
        return _asyncToGenerator(function* () {
          var client = yield connection;
          var entry = {
            value,
            version
          };
          yield client.set("".concat(namespacePrefix).concat(key), JSON.stringify(entry), {
            EX: ttl
          });
        })();
      },
      namespace(namespace) {
        return createCache("".concat(namespacePrefix).concat(namespace, ":"));
      }
    };
  }
  return createCache(prefix);
}