def start_oauth2_dance(self):
login_hint = ''
scope = ''
client = Client.get_by_id(1)
if not client:
# If client does not exist then create an empty one
client = Client(id=1)
client.installer_user = users.get_current_user().email()
client.put()
# Get the login hint from configuration
approval_prompt = 'auto' if client.refresh_token else 'force'
scope = constants.OAUTH2_SCOPE
redirect_uri = helpers.url_for('oauth.oauth_callback',
_external=True)
oauth_helper = OAuthDanceHelper(redirect_uri, approval_prompt, scope)
url = oauth_helper.step1_get_authorize_url()
#TODO: Add a random token to avoid forgery
return redirect(url)
