class ConferenceSpeaker(SpeakerBase):

    def clean_twitter_username(self):

        value = self.twitter_username

        if value.startswith("@"):

            value = value[1:]

        return value

    def save(self, *args, **kwargs):

        self.experience_html = parse(self.experience)

        self.twitter_username = self.clean_twitter_username()

        return super(ConferenceSpeaker, self).save(*args, **kwargs)

    twitter_username = models.CharField(

        max_length=15,

        blank=True,

        help_text=_(u"Your Twitter account")

    )

    first_time = models.BooleanField(

        blank=True,

        verbose_name=_("First-time speaker?"),

        help_text=_("Check this field if this is your first time speaking "

                    "at a technical conference."),

        )

    experience = models.TextField(blank=True, help_text=_

        ("List any past speaking experience you have. This can include "

         "user groups, meetups, or presentations at work or school.  Edit "

         "using <a href='http://warpedvisions.org/projects/"

         "markdown-cheat-sheet/target='_blank'>"

         "Markdown</a>."),

         verbose_name=_("Past speaking experience"),

    )

    experience_html = models.TextField(blank=True)

    travel_assistance = models.BooleanField(

        blank=True,

        verbose_name=_("Travel assistance required?"),

        help_text=_("Check this field if you require travel assistance to get "

                    "to North Bay Python in Petaluma, California."),

    )

    lodging_assistance = models.BooleanField(

        blank=True,

        verbose_name=_("Lodging assistance required?"),

        help_text=_("Check this field if you require lodging assistance in "

                    "Petaluma, California during North Bay Python."),

    )

    home_city = models.CharField(

        blank=True,

        max_length=127,

        help_text=_("Which city (and state, and country) will you be "

                    "traveling from to get to North Bay Python?"),

    )

    minority_group = models.CharField(blank=True, max_length=256,

        verbose_name=_("Diversity statement"),

        help_text=_("If you are a member of one or more groups that are "

                    "under-represented in the tech industry, you may list "

                    "these here. Your response is optional."),

    )

    code_of_conduct = models.BooleanField(

        help_text=_("I have read and, in the event that my proposal is "

                    "accepted, agree that I will comply with the "

                    "<a href='/code-of-conduct'>Code of Conduct</a>."),

    )

DEBUG = bool(int(os.environ.get("DEBUG", "1")))

DATABASES = {

    "default": {

        "ENGINE": "django.db.backends.sqlite3",

        "NAME": os.path.join(PROJECT_ROOT, "dev.db"),

    }

}

UNPREPEND_WWW = bool(int(os.environ.get("DJANGO_UNPREPEND_WWW", "0")))

# HEROKU: Update database configuration with $DATABASE_URL.

import dj_database_url

db_from_env = dj_database_url.config()

DATABASES['default'].update(db_from_env)

ALLOWED_HOSTS = [".localhost", ".herokuapp.com", ".northbaypython.org"]

CANONICAL_HOST = os.environ.get("DJANGO_CANONICAL_HOST", None)

# If DEFAULT_FROM_EMAIL is not set, email will most likely break in prod.

from_email = os.environ.get("DJANGO_DEFAULT_FROM_EMAIL", None)

if from_email is not None:

    DEFAULT_FROM_EMAIL = from_email

# Local time zone for this installation. Choices can be found here:

# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name

# although not all choices may be available on all operating systems.

# On Unix systems, a value of None will cause Django to use the same

# timezone as the operating system.

# If running in a Windows environment this must be set to the same as your

# system time zone.

TIME_ZONE = os.environ.get("TZ", "America/Los_Angeles")

# Set the email address that will receive errors.

admin_email = os.environ.get("DJANGO_ADMIN_EMAIL", None)

if admin_email is not None:

    ADMINS = [("Webmaster", admin_email)]

# Use SSLRedirectMiddleware

SSL_ON = os.environ.get("DJANGO_SSL_ON", True)

SSL_ALWAYS = os.environ.get("DJANGO_SSL_ALWAYS", False)

# Language code for this installation. All choices can be found here:

# http://www.i18nguy.com/unicode/language-identifiers.html

LANGUAGE_CODE = "en-us"