013 - rest service cache

import {ajax} from "rxjs/ajax";
import {map, shareReplay} from "rxjs/operators";

class MyRestService {

  #cacheables = new Map();

  generateAjax(urlOrConfig, enableCache, clear) {
    if(enableCache) {
      const cacheKey = urlOrConfig.url || urlOrConfig;
      if(clear) {
         this.#cacheables.delete(cacheKey);
      }
      this.#cacheables.has(cacheKey) || this.#cacheables.set(cacheKey, this.#generateAjaxBase(urlOrConfig).pipe(shareReplay(1)));

      return this.#cacheables.get(cacheKey);
    }

    return this.#generateAjaxBase(urlOrConfig);
  }

  #generateAjaxBase(urlOrConfig) {
      return ajax(urlOrConfig).pipe(map(r => r.response));
  }

}