'use strict'

// Read a file from disk, store it in Redis, then read it back from Redis.

var redis = require('redis')
var client = redis.createClient({
  returnBuffers: true
})
var fs = require('fs')
var assert = require('assert')
var filename = 'grumpyCat.jpg'

// Get the file I use for testing like this:
//    curl http://media4.popsugar-assets.com/files/2014/08/08/878/n/1922507/caef16ec354ca23b_thumb_temp_cover_file32304521407524949.xxxlarge/i/Funny-Cat-GIFs.jpg -o grumpyCat.jpg
// or just use your own file.

// Read a file from fs, store it in Redis, get it back from Redis, write it back to fs.
fs.readFile(filename, function (err, data) {
  if (err) throw err
  console.log('Read ' + data.length + ' bytes from filesystem.')

  client.set(filename, data, console.log) // set entire file
  client.get(filename, function (err, reply) { // get entire file
    if (err) {
      console.log('Get error: ' + err)
    } else {
      assert.strictEqual(data.inspect(), reply.inspect())
      fs.writeFile('duplicate_' + filename, reply, function (err) {
        if (err) {
          console.log('Error on write: ' + err)
        } else {
          console.log('File written.')
        }
        client.end()
      })
    }
  })
})