getFilenamesAndIds.js

/**
 * Retrieves the filenames and corresponding file IDs of all files within a given Google Drive folder.
 *
 * @param {string} folderId - The ID of the folder.
 * @returns {Object[]} - An array of objects containing the file ID and name.
 */
function getFilenamesAndIds(folderId) {
  // Get the folder using the provided folderId
  let folder = DriveApp.getFolderById(folderId);

  // Get all the files within the folder
  let files = folder.getFiles();

  // Initialize an empty array to store the filenames and file IDs
  let filenamesAndIds = [];

  // Iterate over each file in the folder
  while (files.hasNext()) {
    // Get the next file
    let file = files.next();

    // Retrieve the file ID and name
    let fileId = file.getId();
    let filename = file.getName();

    // Create an object with the file ID and name
    let fileInfo = {
      id: fileId,
      name: filename
    };

    // Add the fileInfo object to the filenamesAndIds array
    filenamesAndIds.push(fileInfo);
  }

  // Return the array containing the filenames and file IDs
  return filenamesAndIds;
}


function getFilenamesAndIds_test() {
  let folderId = "your-folder-id"; // Replace with the actual folder ID

  let filenamesAndIds = getFilenamesAndIds(folderId);
  console.log(filenamesAndIds);
  // [
    // { id: "file1-id", name: "File 1" },
    // { id: "file2-id", name: "File 2" },
    // { id: "file3-id", name: "File 3" },
    // // Additional files...
  // ]

}