cache sent media file_ids with ease for puregram package

if you send a lot of similar MediaSource.path or MediaSource.url media files you've probably encountered a problem with the speed of uploading those files. sometimes those files might be really heavy, and it's not like you really want to wait these extra times every time, do you? that's why you probably need @puregram/media-cacher

const { Telegram, MediaSource } = require('puregram')
const { hooks: cacheHooks } = require('@puregram/media-cacher')

const telegram = Telegram.fromToken(process.env.TOKEN)

telegram.useHooks(cacheHooks())

telegram.updates.on('message', (context) => {
  return context.sendPhoto(MediaSource.path(PATH_TO_FILE))
})

telegram.updates.startPolling()

if the file is heavy, it might take some time to send the photo the first time, but next times will be much faster since the PATH_TO_FILE will be cached with correspnding fileId!

$ yarn add @puregram/media-cacher
$ npm i -S @puregram/media-cacher

internally @puregram/media-cacher uses MemoryStorage that will keep everything in memory. this means that after your bot reloads everything will be lost. you might want to use another storage (like redis or something):

const { RedisStorage } = require('some-redis-storage-implementation-i-guess')

telegram.useHooks(
  cacheHooks({
    storage: new RedisStorage({
      ...
    })
  })
)

as all storage-based puregram packages, @puregram/media-cacher exposes getStorageKey function that allows you to set user keys according to your needs. that key will be used in the storage (storage.get(key), storage.has(key)) to store the fileId