Google gmail api client

Here's a step-by-step guide on how to use the Google Gmail API client:

Prerequisites

  1. Create a Google Cloud Platform project: Go to the Google Cloud Console and create a new project.
  2. Enable the Gmail API: In the sidebar, click on "APIs & Services" and search for "Gmail API". Click on the result, then click on the "Enable" button.
  3. Create credentials: Click on "Create Credentials" and select "OAuth client ID". Choose "Other" as the application type and enter a name for your client ID. Click on "Create" and copy the client ID and client secret.
  4. Install the Google API Client Library: You can install the library using npm or yarn: npm install google-api-library or yarn add google-api-library.

Setting up the API Client

  1. Import the library: const { google } = require('googleapis');
  2. Set up the API client: const auth = new google.auth.GoogleAuth({ // your client ID, client secret, and redirect URI });
  3. Authenticate the client: auth.getClient((err, client) => { // use the client });

Using the API Client

  1. Get the Gmail API client: const gmail = google.gmail('v1');
  2. List labels: gmail.users.labels.list({ userId: 'me' }, (err, res) => { // handle the response });
  3. Get a label: gmail.users.labels.get({ userId: 'me', labelId: 'labelId' }, (err, res) => { // handle the response });
  4. Create a label: gmail.users.labels.create({ userId: 'me', requestBody: { name: 'NewLabel' } }, (err, res) => { // handle the response });
  5. Update a label: gmail.users.labels.update({ userId: 'me', labelId: 'labelId', requestBody: { name: 'UpdatedLabel' } }, (err, res) => { // handle the response });
  6. Delete a label: gmail.users.labels.delete({ userId: 'me', labelId: 'labelId' }, (err, res) => { // handle the response });

Example Code

Here's an example code snippet that lists all labels for the authenticated user:

const { google } = require('googleapis');
const auth = new google.auth.GoogleAuth({
  // your client ID, client secret, and redirect URI
});

auth.getClient((err, client) => {
  if (err) {
    console.error(err);
    return;
  }
  const gmail = google.gmail('v1');
  gmail.users.labels.list({ userId: 'me' }, (err, res) => {
    if (err) {
      console.error(err);
      return;
    }
    console.log(res.data.labels);
  });
});

Error Handling

Make sure to handle errors properly by checking the err object in the callback function. You can also use the try-catch block to catch any errors that may occur.

Security Considerations

When using the Gmail API client, make sure to: