fs

import { openLazyFile } from 'remix/fs'

// Open a file from the filesystem
let lazyFile = openLazyFile('./path/to/file.json')

// The file is lazy - no data is read until you access it
let json = JSON.parse(await lazyFile.text())
console.log(json)

// Read as bytes
let bytes = await lazyFile.bytes()

// Get a readable stream
let stream = lazyFile.stream()

import { openLazyFile } from 'remix/fs'

let lazyFile = openLazyFile('./image.jpg', {
  name: 'custom-name.jpg',
  type: 'image/jpeg',
  lastModified: Date.now(),
})

console.log(lazyFile.name) // 'custom-name.jpg'
console.log(lazyFile.type) // 'image/jpeg'

import { openLazyFile, writeFile } from 'remix/fs'

// Read a file and write it elsewhere
let lazyFile = openLazyFile('./source.txt')
await writeFile('./destination.txt', lazyFile)

import { openLazyFile, writeFile } from 'remix/fs'
import * as fsp from 'node:fs/promises'

// Open a file handle
let handle = await fsp.open('./destination.txt', 'w')

// Write to the handle
let lazyFile = openLazyFile('./source.txt')
await writeFile(handle, lazyFile)

// Close the handle
await handle.close()

import { openLazyFile } from 'remix/fs'
import { createFileResponse } from 'remix/response/file'
import { createRouter } from 'remix/fetch-router'

let router = createRouter()

router.get('/download/:filename', async ({ params, request }) => {
  let lazyFile = openLazyFile(`./uploads/${params.filename}`)
  return createFileResponse(lazyFile, request)
})

import { writeFile } from 'remix/fs'
import { parseFormData } from 'remix/form-data-parser'
import { createRouter } from 'remix/fetch-router'

let router = createRouter()

router.post('/upload', async ({ request }) => {
  let formData = await parseFormData(request, {
    uploadHandler: async (fileUpload) => {
      let path = `./uploads/${Date.now()}-${fileUpload.name}`
      await writeFile(path, fileUpload)
      return path
    },
  })

  let filePath = formData.get('file')
  return Response.json({ filePath })
})

import { openLazyFile } from 'remix/fs'

let lazyFile = openLazyFile('./large-file.json')
let stream = lazyFile.stream()

// Process the stream
for await (let chunk of stream) {
  // Process each chunk
  console.log('Chunk size:', chunk.byteLength)
}