GMail API pagination use of nextPageToken

Question

Have spent hours searching Google et. al. for an answer, sure it\'s simple but how do you create pagination with the GMail api using nextPageToken? what ever I do cannot ge

Answer 1

You could save the next page token on every request and use it in your next request. If there is no next page token in the response, you know that you have gotten all messages:

function listMessages(pageToken) {
  return new Promise(function(resolve) {
    var options = {
      userId: 'me',
      maxResults: 10
    };
    if (pageToken) {
      options.pageToken = pageToken;
    }
    var request = gapi.client.gmail.users.messages.list(options);
    request.execute(resolve);
  });
}

function getMessage(message) {
  return new Promise(function(resolve) {
    var messageRequest = gapi.client.gmail.users.messages.get({
      userId: 'me',
      id: message.id
    });
    messageRequest.execute(resolve);
  });
}

var pageToken;
function displayInbox(){
  listMessages(pageToken).then(function (response) {
    if (response.nextPageToken) {
      pageToken = response.nextPageToken; // Get the next page next time
    } else {
      console.log('No more pages left!');
    }
    if (response.messages) {
      Promise.all(response.messages.map(getMessage)).then(function (messages) {
        messages.forEach(appendMessageRow);
      });
    }
  })
}