Upload File

import * as wmill from "windmill-client"

import { S3Object } from "windmill-client"

const graph = "https://graph.microsoft.com/v1.0"

export type DynSelect_site_id = string

export async function site_id(auth: RT.MsSharepoint) {

  const response = await fetch(

    `${graph}/sites?search=*&$select=id,displayName,webUrl&$top=200`,

    {

      headers: {

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

        Accept: "application/json",

      },

    }

  )

  if (!response.ok) {

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

  }

  const { value } = (await response.json()) as {

    value: { id: string; displayName: string; webUrl: string }[]

  }

  return value.map((s) => ({

    value: s.id,

    label: `${s.displayName} (${s.webUrl})`,

  }))

}

export type DynSelect_drive_id = string

export async function drive_id(auth: RT.MsSharepoint, site_id: string) {

  const response = await fetch(

    `${graph}/sites/${site_id}/drives?$select=id,name`,

    {

      headers: {

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

        Accept: "application/json",

      },

    }

  )

  if (!response.ok) {

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

  }

  const { value } = (await response.json()) as {

    value: { id: string; name: string }[]

  }

  return value.map((d) => ({ value: d.id, label: d.name }))

}

// The site's default document library, or the library given by drive_id

function driveUrl(site_id: string, drive_id: string | undefined) {

  return drive_id != null && drive_id !== ""

    ? `${graph}/drives/${encodeURIComponent(drive_id)}`

    : `${graph}/sites/${site_id}/drive`

}

// An item is addressed by its id, or by a path from the drive root starting with "/"

function ref(item: string | undefined) {

  if (item == null || item === "" || item === "/") return "root"

  if (!item.startsWith("/")) return `items/${encodeURIComponent(item)}`

  const path = item

    .replace(/\/+$/, "")

    .split("/")

    .map(encodeURIComponent)

    .join("/")

  return `root:${path}:`

}

/**

 * Upload File

 * Upload a file from Windmill object storage to a folder in a site's default document library, or in another of its libraries when `drive_id` is set. `folder` is an id, or a path from the drive root starting with "/" (e.g. `/Reports/2026`), the root when empty; `name` defaults to the object's file name. Files over 4 MB go through a resumable upload session in 10 MB chunks. Requires Sites.ReadWrite.All (a connection default).

 */

export async function main(

  auth: RT.MsSharepoint,

  site_id: DynSelect_site_id,

  file: S3Object,

  folder: string | undefined,

  name: string | undefined,

  conflict_behavior: "rename" | "replace" | "fail" = "rename",

  drive_id: DynSelect_drive_id | undefined

) {

  const drive = driveUrl(site_id, drive_id)

  // ponytail: the whole file is held in memory; stream chunks from loadS3FileStream if multi-GB uploads matter

  const bytes = await wmill.loadS3File(file)

  if (!bytes) throw new Error(`Could not load ${file.s3}`)

  const fileName = encodeURIComponent(

    name != null && name !== "" ? name : file.s3.split("/").pop()!

  )

  const parent = ref(folder)

  const target = parent.startsWith("items/")

    ? `${drive}/${parent}:/${fileName}:`

    : `${drive}/root:${parent === "root" ? "" : parent.slice(5, -1)}/${fileName}:`

  if (bytes.length <= 4 * 1024 * 1024) {

    const response = await fetch(

      `${target}/[email protected]=${conflict_behavior}`,

      {

        method: "PUT",

        headers: {

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

          "Content-Type": "application/octet-stream",

          Accept: "application/json",

        },

        body: bytes,

      }

    )

    if (!response.ok) {

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

    }

    return await response.json()

  }

  const session = await fetch(`${target}/createUploadSession`, {

    method: "POST",

    headers: {

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

      "Content-Type": "application/json",

      Accept: "application/json",

    },

    body: JSON.stringify({

      item: { "@microsoft.graph.conflictBehavior": conflict_behavior },

    }),

  })

  if (!session.ok) {

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

  }

  const { uploadUrl } = (await session.json()) as { uploadUrl: string }

  // Chunks must be a multiple of 320 KiB; the upload URL is pre-authenticated

  const chunk = 10 * 1024 * 1024

  for (let start = 0; ; start += chunk) {

    const end = Math.min(start + chunk, bytes.length)

    const response = await fetch(uploadUrl, {

      method: "PUT",

      headers: {

        "Content-Range": `bytes ${start}-${end - 1}/${bytes.length}`,

      },

      body: bytes.subarray(start, end),

    })

    if (!response.ok) {

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

    }

    if (end === bytes.length) return await response.json()

  }

}