@v4fire/core/lib/core/cache/restricted/index.js

V4Fire core library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
var _exportNames = {};
exports.default = void 0;
var _simple = _interopRequireWildcard(require("../../../core/cache/simple"));
Object.keys(_simple).forEach(function (key) {
  if (key === "default" || key === "__esModule") return;
  if (Object.prototype.hasOwnProperty.call(_exportNames, key)) return;
  if (key in exports && exports[key] === _simple[key]) return;
  Object.defineProperty(exports, key, {
    enumerable: true,
    get: function () {
      return _simple[key];
    }
  });
});
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
class RestrictedCache extends _simple.default {
  queue = new Set();
  capacity = 20;
  constructor(max) {
    super();
    if (max != null) {
      this.setCapacity(max);
    }
  }
  get(key) {
    if (this.has(key)) {
      this.queue.delete(key);
      this.queue.add(key);
    }
    return super.get(key);
  }
  set(key, value) {
    this.queue.delete(key);
    if (this.queue.size === this.capacity) {
      const key = this.queue.values().next().value;
      if (key !== undefined) {
        this.remove(key);
      }
    }
    this.queue.add(key);
    return super.set(key, value);
  }
  remove(key) {
    if (this.has(key)) {
      this.queue.delete(key);
      return super.remove(key);
    }
  }
  clear(filter) {
    const removed = super.clear(filter);
    for (let o = this.queue.values(), i = o.next(); !i.done; i = o.next()) {
      const el = i.value;
      if (removed.has(el)) {
        this.queue.delete(el);
      }
    }
    return removed;
  }
  setCapacity(value) {
    if (!Number.isInteger(value) || value < 0) {
      throw new TypeError('A value of `max` can be defined only as a non-negative integer number');
    }
    const removed = new Map(),
      amount = value - this.capacity;
    this.capacity = value;
    if (amount < 0) {
      while (this.capacity < this.queue.size) {
        const key = this.queue.values().next().value,
          el = this.remove(key);
        if (el) {
          removed.set(key, el);
        }
      }
    }
    return removed;
  }
}
exports.default = RestrictedCache;