Converting from word document to native google doc - google-apps-script

Question

So I have some 2000 word documents I can generate with c#, however, I need them uploaded to google docs, in the native google docs format.
I looked at This guide to try to convert them, however, the code fails on the second to last line.
(My code below)
function myFunction() {
var folder = DriveApp.getFoldersByName("test").next();
var contents = folder.getFiles();
while (contents.hasNext()){
var file = contents.next();
var fileName = file.getName();
var officeFile = DriveApp.getFilesByName(fileName).next();
// Use the Advanced Drive API to upload the Excel file to Drive
// convert = true will convert the file to the corresponding Google Docs format
var uploadFile = JSON.parse(UrlFetchApp.fetch(
"https://www.googleapis.com/upload/drive/v2/files?uploadType=media&convert=true",
{
method: "POST",
contentType: officeFile.getMimeType(),
payload: officeFile.getBlob().getBytes(),
headers: {
"Authorization" : "Bearer " + ScriptApp.getOAuthToken()
},
muteHttpExceptions: true
}
).getContentText());
// Remove the file extension from the original file name
var fileName2 = officeFile.getName();
fileName2 = fileName2.substr(0, fileName2.lastIndexOf("."));
// Update the name of the Google Sheet created from the Excel sheet
DriveApp.getFileById(uploadFile.getID()).setName(fileName2); // FAILS HERE
//Logger.log(uploadFile.alternateLink);
}}
TypeError: Cannot find function getID in object [object Object]. (line 33, file "Code")
I understand what kind of error this is, however, I do not necessarily know how to solve it.

Answer 1

You don't need any UrlFetchApp manipulations. The Advanced Drive Service provides conversion as a part of copy method. Takes two lines of code:
var fileId = 'ID_of_Word_file';
Drive.Files.copy({}, fileId, {'convert': true});
You will need to enable this service in the scropt menu: see Resources > Advanced Services.
If iterating through a folder, get each file from file iterator with .next() and use getId() to get its id; the proceed as above.
The empty object in the first argument can be used to name the new file: e.g., it could be {'title': 'Name of new file'}