Create Folder

//native

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

function driveUrl(drive_id: string | undefined) {

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

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

    : `${graph}/me/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}:`

}

/**

 * Create Folder

 * Create a folder in your OneDrive, or in another drive when `drive_id` is set. `parent` is an id, or a path from the drive root starting with "/" (e.g. `/Reports/2026`), the root when empty. Requires Files.ReadWrite (a connection default); a drive that is not your own needs Files.ReadWrite.All.

 */

export async function main(

  auth: RT.MsOnedrive,

  name: string,

  parent: string | undefined,

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

  drive_id: string | undefined

) {

  const drive = driveUrl(drive_id)

  const response = await fetch(`${drive}/${ref(parent)}/children`, {

    method: "POST",

    headers: {

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

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

      Accept: "application/json",

    },

    body: JSON.stringify({

      name,

      folder: {},

      "@microsoft.graph.conflictBehavior": conflict_behavior,

    }),

  })

  if (!response.ok) {

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

  }

  return await response.json()

}