@dpkit/zip/package/load.ts

Fast TypeScript data management framework built on top of the Data Package standard and Polars DataFrames

import { readFile, writeFile } from "node:fs/promises"
import { mkdir } from "node:fs/promises"
import { dirname, join } from "node:path"
import { loadPackageDescriptor } from "@dpkit/core"
import { getTempFolderPath } from "@dpkit/folder"
import { unzip } from "fflate"

export async function loadPackageFromZip(archivePath: string) {
  const basepath = getTempFolderPath()
  const zipData = await readFile(archivePath)

  const entries = await new Promise<Record<string, Uint8Array>>(
    (resolve, reject) => {
      unzip(zipData, (err, unzipped) => {
        if (err) reject(err)
        else resolve(unzipped)
      })
    },
  )

  for (const [filename, data] of Object.entries(entries)) {
    const path = join(basepath, filename)

    if (filename.endsWith("/")) {
      await mkdir(path, { recursive: true })
      continue
    }

    await mkdir(dirname(path), { recursive: true })
    await writeFile(path, data)
  }

  const dataPackage = await loadPackageDescriptor(
    join(basepath, "datapackage.json"),
  )

  return dataPackage
}