fqtree/src/caches.ts

a flexible quadtree for JavaScript/TypeScript

import { Option, is_none } from 'onsreo';

export class DataCache<T> {
  cache: Map<number, T>;

  constructor() {
    this.cache = new Map();
  }

  destroy() {
    this.cache.clear();
  }

  add(data: T, id: number): void {
    this.cache.set(id, data);
  }

  all(): IterableIterator<T> {
    return this.cache.values();
  }

  get(id: Option<number>): Option<T> {
    return id ? this.cache.get(id) : undefined;
  }

  has(id: Option<number>): boolean {
    return id ? this.cache.has(id) : false;
  }

  remove(id: Option<number>): void {
    id && this.cache.delete(id);
  }
}

let __qt_data_cache: Option<DataCache<any>> = null;

export function get_data_cache<T>(): DataCache<T> {
  if (is_none(__qt_data_cache)) {
    __qt_data_cache = new DataCache<T>();
  }
  return __qt_data_cache;
}

let __qt_quadrant_cache: Option<DataCache<any>> = null;

export function get_qt_cache<T>(): DataCache<T> {
  if (is_none(__qt_quadrant_cache)) {
    __qt_quadrant_cache = new DataCache<T>();
  }
  return __qt_quadrant_cache;
}