s2CNWyzX

1 // Load client secrets from a local file.
2  return readFile("credentials.json")
3    .then(async content => {
4      const token = await authorize(JSON.parse(content));
5      return await parseAttachment(token);
6    })
7    .catch(err => {
8      return console.log("Error loading client secret file:", err);
9    })
10
11  /**
12   * Create an OAuth2 client with the given credentials, and then execute the
13   * given callback function.
14   * @param {Object} credentials The authorization client credentials.
15   * @param {function} callback The callback to call with the authorized client.
16   */
17  async function authorize(credentials) {
18    const { client_secret, client_id, redirect_uris } = credentials.installed;
19    const oAuth2Client = new google.auth.OAuth2(
20      client_id, client_secret, redirect_uris[0]
21    );
22
23    // Check if we have previously stored a token.
24    try {
25      const oAuthToken = await readFile(TOKEN_PATH);
26      oAuth2Client.setCredentials(JSON.parse(oAuthToken));
27    } catch (err) {
28      await getNewToken(oAuth2Client);
29    }
30    return oAuth2Client;
31  }
32
33  /**
34   * Get and store new token after prompting for user authorization, and then
35   * execute the given callback with the authorized OAuth2 client.
36   * @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
37   * @param {getEventsCallback} callback The callback for the authorized client.
38   */
39  function getNewToken(oAuth2Client) {
40    const authUrl = oAuth2Client.generateAuthUrl({
41      access_type: 'offline',
42      scope: SCOPES,
43    });
44    console.log('Authorize this app by visiting this url:', authUrl);
45    const rl = readline.default.createInterface({
46      input: process.stdin,
47      output: process.stdout,
48    });
49
50    return rl.questionAsync('Enter the code from that page here: ')
51      .then(code => {
52        return oAuth2Client.getToken(code);
53      })
54      .then(tokenData => {
55        const token = tokenData.tokens;
56        oAuth2Client.setCredentials(token);
57        // Store the token to disk for later program executions
58        writeFile(TOKEN_PATH, JSON.stringify(token))
59        console.log("Token stored to", TOKEN_PATH);
60        return oAuth2Client;
61      })
62      .catch(err => {
63        return console.error(err);
64      })
65  }