Copy File or Folder

//native

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}:`

}

async function folderId(

  token: string,

  drive: string,

  folder: string

): Promise<string> {

  if (!folder.startsWith("/")) return folder

  const response = await fetch(`${drive}/${ref(folder)}?$select=id`, {

    headers: { Authorization: `Bearer ${token}`, Accept: "application/json" },

  })

  if (!response.ok) {

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

  }

  return ((await response.json()) as { id: string }).id

}

/**

 * Copy File or Folder

 * Copy a file or folder into another folder, optionally under a new name and into another drive (`destination_drive_id`). `item` and `destination_folder` are each an id, or a path from the drive root starting with "/" (e.g. `/Reports/2026/summary.xlsx`). Graph copies asynchronously: with `wait` the script polls for up to a minute, returns the final status with the new item's `resourceId` and fails if the copy failed (e.g. a name clash), otherwise it returns the `monitor_url` right away. Requires Sites.ReadWrite.All (a connection default).

 */

export async function main(

  auth: RT.MsSharepoint,

  site_id: DynSelect_site_id,

  item: string,

  destination_folder: string | undefined,

  new_name: string | undefined,

  destination_drive_id: string | undefined,

  wait: boolean = true,

  drive_id: DynSelect_drive_id | undefined

) {

  const drive = driveUrl(site_id, drive_id)

  const body: { [key: string]: any } = {}

  if (new_name != null && new_name !== "") body.name = new_name

  const otherDrive = destination_drive_id != null && destination_drive_id !== ""

  if (otherDrive || (destination_folder != null && destination_folder !== "")) {

    const destinationDrive = otherDrive

      ? `${graph}/drives/${encodeURIComponent(destination_drive_id!)}`

      : drive

    body.parentReference = {

      id: await folderId(

        auth.token,

        destinationDrive,

        destination_folder || "/"

      ),

    }

    if (otherDrive) body.parentReference.driveId = destination_drive_id

  }

  const response = await fetch(`${drive}/${ref(item)}/copy`, {

    method: "POST",

    headers: {

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

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

      Accept: "application/json",

    },

    body: JSON.stringify(body),

  })

  if (!response.ok) {

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

  }

  // 202 Accepted with an empty body; Location is a pre-authenticated monitor URL

  const monitor_url = response.headers.get("Location")

  if (!wait || !monitor_url) return { monitor_url }

  let status: { [key: string]: any } = {}

  for (let i = 0; i < 30; i++) {

    const poll = await fetch(monitor_url, { redirect: "manual" })

    // A finished copy may instead redirect to the new item

    if (poll.status >= 300 && poll.status < 400) {

      const resourceId = poll.headers

        .get("Location")

        ?.match(/\/items\/([^/?#:]+)/)?.[1]

      return { status: "completed", resourceId, monitor_url }

    }

    if (!poll.ok) throw new Error(`${poll.status} ${await poll.text()}`)

    status = await poll.json()

    if (status.status === "failed") throw new Error(JSON.stringify(status))

    if (status.status === "completed") break

    await new Promise((resolve) => setTimeout(resolve, 2000))

  }

  return { ...status, monitor_url }

}