import os

import uuid

from django.db import models

from django.db.models import Q

from django.utils.translation import ugettext_lazy as _

from django.utils.timezone import now

from django.core.exceptions import ObjectDoesNotExist

from django.core.exceptions import ValidationError

from symposion.conference.models import Section

from symposion.speakers.models import Speaker

class ProposalSection(models.Model):

    """

      * closed is NULL or False

    """

    start = models.DateTimeField(null=True, blank=True, verbose_name=_("Start"))

    end = models.DateTimeField(null=True, blank=True, verbose_name=_("End"))

    to distinguish the section as well as the kind.

    """

    name = models.CharField(_("Name"), max_length=100)

    slug = models.SlugField(verbose_name=_("Slug"))

    objects = InheritanceManager()

    title = models.CharField(max_length=100, verbose_name=_("Title"))

    abstract = models.TextField(

        editable=False,

        verbose_name=_("Submitted")

    )

    # @@@ this validation used to exist as a validators keyword on additional_speakers

    #     M2M field but that is no longer supported by Django. Should be moved to

        (SPEAKING_STATUS_DECLINED, _("Declined")),

    ]

    status = models.IntegerField(choices=SPEAKING_STATUS, default=SPEAKING_STATUS_PENDING, verbose_name=_("Status"))

    class Meta:

class SupportingDocument(models.Model):

    created_at = models.DateTimeField(default=now, verbose_name=_("Created at"))