readImageDICOMFileSeries.js

import createWebworkerPromise from './createWebworkerPromise'
import PromiseFileReader from 'promise-file-reader'

import config from './itkConfig'

const readImageDICOMFileSeries = (webWorker, fileList) => {
  let worker = webWorker
  return createWebworkerPromise('ImageIO', worker)
    .then(({ webworkerPromise, worker: usedWorker }) => {
      worker = usedWorker
      const fetchFileDescriptions = Array.from(fileList, function (file) {
        return PromiseFileReader.readAsArrayBuffer(file).then(function (arrayBuffer) {
          const fileDescription = { name: file.name, type: file.type, data: arrayBuffer }
          return fileDescription
        })
      })

      return Promise.all(fetchFileDescriptions).then(function (fileDescriptions) {
        const transferables = fileDescriptions.map((description) => {
          return description.data
        })
        return webworkerPromise.postMessage({ operation: 'readDICOMImageSeries', fileDescriptions: fileDescriptions, config: config },
          transferables)
      }
      ).then(function (image) {
        return Promise.resolve({ image, webWorker: worker })
      })
    })
}

export default readImageDICOMFileSeries