LocalCacheService

LocalCacheService.ts

import { DateTime } from 'luxon'
import Logger from '@ioc:Adonis/Core/Logger'

class LocalCacheService {
  private cache: { [key: string]: any } = {}
  timerRef: NodeJS.Timer

  constructor() {
    this.timerRef = setInterval(() => {
      Logger.trace('Auto cleaning expired item')
      this.cleanExpired()
    }, 60 * 60 * 1000)
  }

  get(key: string) {
    const data = this.cache[key]
    if (!data) return

    if (DateTime.fromMillis(data.created_at).diffNow().toMillis() < -data.expire) {
      this.delete(key)
      return
    }
    return data.value || true
  }
  set(key: string, value: any, expire = 60) {
    return (this.cache[key] = { value, expire, created_at: DateTime.now().toMillis() })
  }
  getSet(key: string, value: any, setIfValue?: boolean) {
    const cachedValue = this.get(key)
    if (setIfValue && !cachedValue) return cachedValue
    this.set(key, value)
    return cachedValue
  }
  delete(key: string) {
    return delete this.cache[key]
  }
  cleanExpired() {
    Object.entries(this.cache).forEach(([key, data]) => {
      if (DateTime.fromMillis(data.created_at).diffNow().toMillis() < -data.expire) {
        this.delete(key)
      }
    })
  }
}

export default new LocalCacheService()