// Written by Amit Agarwal www.ctrlq.org

// Step 1.
function authorizeBox() {
  var service = getBoxService_();
  if (!service.hasAccess()) {
    var authorizationUrl = service.getAuthorizationUrl();
    Logger.log('Open the following URL to authorize: %s', authorizationUrl);
  } else {
    Logger.log('Your account is already authorized');
  }
}

// Step 2.
function getFoldersList() {
  var response = UrlFetchApp.fetch('https://api.box.com/2.0/folders/0/items?fields=name,type', {
    headers: {
      Authorization: 'Bearer ' + getBoxService_().getAccessToken(),
    },
  });

  var result = JSON.parse(response.getContentText());
  var items = result.entries;

  var folders = [];

  for (var i = 0; i < items.length; i++) {
    if (items[i].type === 'folder') {
      folders.push({ name: items[i].name, id: items[i].id });
    }
  }

  Logger.log(folders);
}

/**
 * Configures the service.
 */
function getBoxService_() {
  return OAuth2.createService('Box')
    .setAuthorizationBaseUrl('https://app.box.com/api/oauth2/authorize')
    .setTokenUrl('https://app.box.com/api/oauth2/token')
    .setClientId(CLIENT_ID)
    .setClientSecret(CLIENT_SECRET)
    .setCallbackFunction('authCallback')
    .setPropertyStore(PropertiesService.getUserProperties());
}

/**
 * Handles the OAuth callback.
 */
function authCallback(request) {
  var service = getBoxService_();
  var authorized = service.handleCallback(request);
  if (authorized) {
    return HtmlService.createHtmlOutput('Your Google account is now connected to Box');
  } else {
    return HtmlService.createHtmlOutput('Sorry, the connection to Box was denied');
  }
}