Get 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}:`

}

/**

 * Get File or Folder

 * Get the metadata of a file or folder in a site's default document library, or in another of its libraries when `drive_id` is set: name, size, web URL, parent, timestamps and a short-lived `@microsoft.graph.downloadUrl`. `item` is an id, or a path from the drive root starting with "/" (e.g. `/Reports/2026/summary.xlsx`). `expand` takes relationships such as `listItem`, `permissions` or `thumbnails`. Requires Sites.Read.All (covered by the default Sites.ReadWrite.All).

 */

export async function main(

  auth: RT.MsSharepoint,

  site_id: DynSelect_site_id,

  item: string,

  select: string | undefined,

  expand: string | undefined,

  drive_id: DynSelect_drive_id | undefined

) {

  const drive = driveUrl(site_id, drive_id)

  const url = new URL(`${drive}/${ref(item)}`)

  if (select != null && select !== "") {

    url.searchParams.append("$select", select)

  }

  if (expand != null && expand !== "") {

    url.searchParams.append("$expand", expand)

  }

  const response = await fetch(url, {

    headers: {

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

      Accept: "application/json",

    },

  })

  if (!response.ok) {

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

  }

  return await response.json()

}