import random

import sys

from django.conf import settings

from django.core.exceptions import ObjectDoesNotExist

from django.core.urlresolvers import reverse

from django.db.models import Q

from django.http import Http404, HttpResponse, HttpResponseForbidden

from django.shortcuts import render, redirect, get_object_or_404

from django.views import static

from django.contrib import messages

from django.contrib.auth.models import User

from django.contrib.auth.decorators import login_required

from account.models import EmailAddress

from symposion.proposals.models import (

    ProposalBase, ProposalSection, ProposalKind

)

from symposion.proposals.models import SupportingDocument, AdditionalSpeaker

from symposion.speakers.models import Speaker

from symposion.utils.mail import send_email

            message_ctx = {

                "proposal": proposal,

            }

            def create_speaker_token(email_address):

                # create token and look for an existing speaker to prevent

                # duplicate tokens and confusing the pending speaker

                try:

                    pending = Speaker.objects.get(

                        Q(user=None, invite_email=email_address)

                    )

                except Speaker.DoesNotExist:

                    pending = Speaker.objects.create(

                        invite_email=email_address,

                        invite_token=token,

                    )

                else:

                    token = pending.invite_token

                return pending, token

            email_address = add_speaker_form.cleaned_data["email"]

            # check if email is on the site now

            users = EmailAddress.objects.get_users_for(email_address)

            if users:

                # should only be one since we enforce unique email