gd.js

const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
const async = require('async');
var firebase = require("firebase");

var data=[];
var imgs=[]
const SCOPES = [
  "https://www.googleapis.com/auth/drive",
  "https://www.googleapis.com/auth/drive.file",
  "https://www.googleapis.com/auth/drive.readonly",
  "https://www.googleapis.com/auth/drive.metadata.readonly",
  "https://www.googleapis.com/auth/drive.appdata",
  "https://www.googleapis.com/auth/drive.metadata",
  "https://www.googleapis.com/auth/drive.photos.readonly"
];
const firebaseConfig = {
    apiKey: "************************",
    authDomain: "yearbook-1131e.firebaseapp.com",
    databaseURL: "https://yearbook-1131e.firebaseio.com",
    projectId: "yearbook-1131e",
    storageBucket: "yearbook-1131e.appspot.com",
    messagingSenderId: " ",
    appId: " "
};
firebase.initializeApp(firebaseConfig);

var folderId = "'1PwsnZoBQReCFjG18lX8eIhPONGpxp8VC'";
var collection = "year5"
var collection2 = "random" 


const TOKEN_PATH = 'token.json';

fs.readFile('credentials.json', (err, content) => {
  if (err) return console.log('Error loading client secret file:', err);
  authorize(JSON.parse(content), listFiles);
});

/**
 * Create an OAuth2 client with the given credentials, and then execute the
 * given callback function.
 * @param {Object} credentials The authorization client credentials.
 * @param {function} callback The callback to call with the authorized client.
 */
function authorize(credentials, callback) {
  const {client_secret, client_id, redirect_uris} = credentials.web;
  const oAuth2Client = new google.auth.OAuth2(
      client_id, client_secret, redirect_uris[0]);

  // Check if we have previously stored a token.
  fs.readFile(TOKEN_PATH, (err, token) => {
    if (err) return getAccessToken(oAuth2Client, callback);
    oAuth2Client.setCredentials(JSON.parse(token));
    callback(oAuth2Client);
  });
}

/**
 * Get and store new token after prompting for user authorization, and then
 * execute the given callback with the authorized OAuth2 client.
 * @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
 * @param {getEventsCallback} callback The callback for the authorized client.
 */
function getAccessToken(oAuth2Client, callback) {
  const authUrl = oAuth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: SCOPES,
  });
  console.log('Authorize this app by visiting this url:', authUrl);
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });
  rl.question('Enter the code from that page here: ', (code) => {
    rl.close();
    oAuth2Client.getToken(code, (err, token) => {
      if (err) return console.error('Error retrieving access token', err);
      oAuth2Client.setCredentials(token);
      // Store the token to disk for later program executions
      fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
        if (err) return console.error(err);
        console.log('Token stored to', TOKEN_PATH);
      });
      callback(oAuth2Client);
    });
  });
}
 function saveData(collection,array){

    array.forEach((item)=>{
         firebase.firestore().collection('yearbook').doc('folders').collection(collection).add({
            url:item
        })
    })
    
  }

   function saveData2(collection1,collection2,array){

    array.forEach((item)=>{
         firebase.firestore().collection('yearbook').doc('folders').collection(collection1).doc("folders").collection(collection2).add({
            url:item
        })
    })
    console.log("done2")
  }
function makeUrl (id){
  var str = "https://drive.google.com/uc?export=view&id="
  var url = str + id
  return url
}

function urlFromData(data){
  data.forEach((item)=>{
    var url = makeUrl(item.id)
    imgs.push(url)
  })
//   saveData(collection,imgs)
  saveData2(collection,collection2,imgs)
// console.log(data)
  console.log("completed") 

  // app.render('index-Copy',{imgs:imgs},function(err,html){
  //   console.log("re rendering")
  //   if(err){
  //     console.log(err)
  //   }
  // })

  // console.log(imgs)     <%console.log(imgs)%> <img src= <% imgs[1] %> >     <%console.log(imgs[1])%>


}
/**
 * Lists the names and IDs of up to 10 files.
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listFiles(auth) {
  const drive = google.drive({version: 'v3', auth});
  var pageToken = null;
// Using the NPM module 'async'
async.doWhilst(
  function (callback) {
  drive.files.list({
    q:  folderId + " in parents and 	mimeType != 'application/vnd.google-apps.folder' ",
    fields: 'nextPageToken, files(id, name)',
    spaces: 'drive',
    pageToken: pageToken
  }, function (err, res) {
    if (err) {
      // Handle error
      console.error(err);
      callback(err)
    } else {
      // res.data.files.forEach(function (file) {
      //   console.log('Found file: ', file.name, file.id);
      //   data.push(file)
      // });
      // console.log(res.data.files)
      data= [...res.data.files]
      // console.log(data)
      pageToken = res.nextPageToken;
      callback();
    }
  });
}, function (callback) {
  callback();
  return !!pageToken;
}, function (err) {
  if (err) {
    // Handle error
    console.error(err);
  } else {
    // All pages fetched
    // console.log(data)
    // data.forEach((x)=>{
        
    //     if((/.pdf$/.test(x.name))||(/.mp4$/.test(x.name))||(/.txt$/.test(x.name))){  
              
    //         // console.log("xi=",x)  
    //       }
    // })
    

    urlFromData(data)
  }
})
// console.log(data)
}