@prezly/theme-kit-core/build/content-delivery/cache/memory.cjs

Data layer and utility library for developing Prezly themes with JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.RECORDS_LIMIT = void 0;
exports.createSharedMemoryCache = createSharedMemoryCache;
var RECORDS_LIMIT = exports.RECORDS_LIMIT = 10000;
var GC_PROBABILITY = 1 / 100;
var CACHE = new Map();
function createSharedMemoryCache() {
  var prefix = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
  return {
    get(key, latestVersion) {
      var entry = CACHE.get("".concat(prefix).concat(key));
      if (!entry) {
        return undefined;
      }
      if (entry.version < latestVersion) {
        CACHE.delete("".concat(prefix).concat(key));
        return undefined;
      }
      var {
        value,
        version
      } = entry;
      CACHE.set("".concat(prefix).concat(key), {
        value,
        version,
        accessed: new Date().getTime()
      });
      return value;
    },
    set(key, value, version) {
      var entry = {
        value,
        version,
        accessed: new Date().getTime()
      };
      CACHE.set("".concat(prefix).concat(key), entry);
      if (CACHE.size > RECORDS_LIMIT && Math.random() < GC_PROBABILITY) {
        gc();
      }
    },
    namespace(namespace) {
      return createSharedMemoryCache("".concat(prefix).concat(namespace, ":"));
    }
  };
}
function gc() {
  Array.from(CACHE.entries()).sort((_ref, _ref2) => {
    var [, a] = _ref;
    var [, b] = _ref2;
    return -cmp(a.accessed, b.accessed);
  }).slice(RECORDS_LIMIT).forEach(_ref3 => {
    var [key] = _ref3;
    CACHE.delete(key);
  });
}
function cmp(a, b) {
  if (a === b) return 0;
  return a < b ? -1 : 1;
}