Gmail Management App

// Client ID and API key from the Developer Console
const CLIENT_ID = 'YOUR_CLIENT_ID';
const API_KEY = 'YOUR_API_KEY';

// Array of API discovery doc URLs for APIs used
const DISCOVERY_DOCS = ['https://www.googleapis.com/discovery/v1/apis/gmail/v1/rest'];

// Authorization scopes required by the API
const SCOPES = 'https://www.googleapis.com/auth/gmail.modify';

let authorizeButton = document.getElementById('authorize_button');
let cleanupButton = document.getElementById('cleanup_button');

function handleClientLoad() {
  gapi.load('client:auth2', initClient);
}

function initClient() {
  gapi.client.init({
    apiKey: API_KEY,
    clientId: CLIENT_ID,
    discoveryDocs: DISCOVERY_DOCS,
    scope: SCOPES
  }).then(function () {
    // Listen for sign-in state changes
    gapi.auth2.getAuthInstance().isSignedIn.listen(updateSigninStatus);

    // Handle initial sign-in state
    updateSigninStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
    authorizeButton.onclick = handleAuthClick;
    cleanupButton.onclick = cleanupInbox;
  });
}

function updateSigninStatus(isSignedIn) {
  if (isSignedIn) {
    authorizeButton.style.display = 'none';
    cleanupButton.disabled = false;
  } else {
    authorizeButton.style.display = 'block';
    cleanupButton.disabled = true;
  }
}

function handleAuthClick() {
  gapi.auth2.getAuthInstance().signIn();
}

function cleanupInbox() {
  gapi.client.gmail.users.messages.list({
    'userId': 'me',
    'q': 'is:unread older_than:7d' // Example: Cleanup unread emails older than 7 days
  }).then(function(response) {
    let messages = response.result.messages;
    if (messages && messages.length > 0) {
      for (let i = 0; i < messages.length; i++) {
        let message = messages[i];
        gapi.client.gmail.users.messages.modify({
          'userId': 'me',
          'id': message.id,
          'removeLabelIds': ['UNREAD'] // Example: Remove the 'unread' label
        }).then(function() {
          console.log('Email marked as read:', message.id);
        });
      }
    } else {
      console.log('No messages found.');
    }
  });
}