@atlaskit/profilecard/dist/es2019/client/CachingClient.js

A React component to display a card with user information.

import { LRUMap } from 'lru_map';
export default class CachingClient {
  constructor(config) {
    const defaults = {
      cacheSize: 10,
      cacheMaxAge: 0
    };
    this.config = {
      ...defaults,
      ...config
    };
    // never set cacheSize or cacheMaxAge to negative numbers
    this.config.cacheSize = Math.max(this.config.cacheSize || 0, 0);
    this.config.cacheMaxAge = Math.max(this.config.cacheMaxAge || 0, 0);
    // DIR-474: cap cache at 30 days.
    if (this.config.cacheMaxAge) {
      this.config.cacheMaxAge = Math.min(this.config.cacheMaxAge, 30 * 24 * 60 * 60 * 1000);
    }
    // Only set cache if maxCacheAge and cacheSize are set
    this.cache = !this.config.cacheMaxAge || !this.config.cacheSize ? null : new LRUMap(this.config.cacheSize);
  }
  setCachedProfile(cacheIdentifier, profile) {
    this.cache && this.cache.set(cacheIdentifier, {
      expire: Date.now() + this.config.cacheMaxAge,
      profile
    });
  }
  getCachedProfile(cacheIdentifier) {
    if (!this.cache) {
      return null;
    }
    const cached = this.cache.get(cacheIdentifier);
    if (!cached) {
      return null;
    }
    if (cached.expire < Date.now()) {
      this.cache.delete(cacheIdentifier);
      return null;
    }

    // Extend expiry "date"
    this.setCachedProfile(cacheIdentifier, cached.profile);
    return cached.profile;
  }
  flushCache() {
    if (this.cache) {
      this.cache.clear();
    }
  }
}