// import a file and export it again
import { importer } from 'ipfs-unixfs-importer'
import { exporter } from 'ipfs-unixfs-exporter'
import { MemoryBlockstore } from 'blockstore-core/memory'

// Should contain the blocks we are trying to export
const blockstore = new MemoryBlockstore()
const files = []

for await (const file of importer([{
  path: '/foo/bar.txt',
  content: new Uint8Array([0, 1, 2, 3])
}], blockstore)) {
  files.push(file)
}

console.info(files[0].cid) // Qmbaz

const entry = await exporter(files[0].cid, blockstore)

console.info(entry.cid) // Qmqux
console.info(entry.path) // Qmbaz/foo/bar.txt
console.info(entry.name) // bar.txt
console.info(entry.unixfs.fileSize()) // 4

// stream content from unixfs node
const size = entry.unixfs.fileSize()
const bytes = new Uint8Array(size)
let offset = 0

for await (const buf of entry.content()) {
  bytes.set(buf, offset)
  offset += chunk.length
}

console.info(bytes) // 0, 1, 2, 3