Download Attachment

import * as wmill from "windmill-client"

import { S3Object } from "windmill-client"

/**

 * Download Attachment

 * Download a message's file attachment to Windmill object storage and return its S3 reference. Get the attachment id from List Attachments. Requires Mail.Read (covered by the default Mail.ReadWrite).

 */

export async function main(

  auth: RT.Outlook,

  message_id: string,

  attachment_id: string,

  destination: S3Object,

  mailbox: string | undefined

) {

  const base = `https://graph.microsoft.com/v1.0/${

    mailbox != null && mailbox !== ""

      ? `users/${encodeURIComponent(mailbox)}`

      : "me"

  }`

  const response = await fetch(

    `${base}/messages/${encodeURIComponent(

      message_id

    )}/attachments/${encodeURIComponent(attachment_id)}/$value`,

    { headers: { Authorization: `Bearer ${auth.token}` } }

  )

  if (!response.ok) {

    throw new Error(`${response.status} ${await response.text()}`)

  }

  await wmill.writeS3File(

    destination,

    response.body as ReadableStream<Uint8Array>

  )

  return destination

}