googleapis.js

//google api
const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
const path = require('path');

const SCOPES =  ['https://www.googleapis.com/auth/drive',
'https://www.googleapis.com/auth/drive.file',
'https://www.googleapis.com/auth/drive.appdata',];

const TOKEN_PATH = 'token.json';

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) console.error(err);
                console.log('Token stored to', TOKEN_PATH);
            });
            callback(oAuth2Client);
        });
    });
}
// If modifying these scopes, delete token.json.
module.exports = {

  

   authorize: (credentials, callback) => {
        const {client_secret, client_id, redirect_uris} = credentials.installed;
        const oAuth2Client = new google.auth.OAuth2( client_id, client_secret, redirect_uris[0]);
        fs.readFile(path.join(__dirname, './token.json'), (err, token) => {
            if (err) return getAccessToken(oAuth2Client, callback);
            oAuth2Client.setCredentials(JSON.parse(token));
            callback(oAuth2Client);
        });
   }
}



/**
 * Lists the names and IDs of up to 10 files.
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */

// function listFiles(auth) {
//   drive = google.drive({version: 'v3', auth});
//   drive.files.list({
//     pageSize: 10,
//     fields: 'nextPageToken, files(id, name)',
//   }, (err, res) => {
//     if (err) return console.log('The API returned an error: ' + err);
//     const files = res.data.files;
//     if (files.length) {
//       console.log('Files:');
//       files.map((file) => {
//         console.log(`${file.name} (${file.id})`);
//       });
//     } else {
//       console.log('No files found.');
//     }
//   });
// }