old_contents: # Copyright 2017 Jonathan Anderson
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # 1. Redistributions of source code must retain the above copyright notice, this
  # list of conditions and the following disclaimer.
  #
  # 2. Redistributions in binary form must reproduce the above copyright notice,
  # this list of conditions and the following disclaimer in the documentation
  # and/or other materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  from flask_wtf import FlaskForm
  from wtforms.fields import *
  from wtforms.widgets import HiddenInput, TextArea
  from wtforms.validators import Email, Optional, Required
  
  shirt_choices = [ (i,i) for i in ('', 'S', 'M', 'L', 'XL', '2XL', '3XL') ]
  
  class RegistrationForm(FlaskForm):
      name = TextField()
      username = TextField('FreeBSD username (if you have one)')
      host = SelectField(coerce = int)
      email = TextField('Email address')
      address = TextField(widget = TextArea(), validators = [ Required() ])
      arrival = DateField(validators = [ Optional() ])
      departure = DateField(validators = [ Optional() ])
      shirt_size = SelectField(choices = shirt_choices)
      dietary_needs = TextField()
  
      def validate(self):
          if not FlaskForm.validate(self):
              return False
  
          if self.username.data == '' and self.host.data == -1:
              self.host.errors.append(
                      "Guests without a FreeBSD username require a host")
              return False
  
          if self.username.data != '' and self.host.data != -1:
              self.host.errors.append(
                      "People with @FreeBSD.org usernames do not require a host")
              return False
  
          return True
  
new_contents: # Copyright 2017 Jonathan Anderson
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # 1. Redistributions of source code must retain the above copyright notice, this
  # list of conditions and the following disclaimer.
  #
  # 2. Redistributions in binary form must reproduce the above copyright notice,
  # this list of conditions and the following disclaimer in the documentation
  # and/or other materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  from flask_wtf import FlaskForm
  from wtforms.fields import *
  from wtforms.widgets import HiddenInput, TextArea
  from wtforms.validators import Email, Optional, Required
  
  shirt_choices = [ (i,i) for i in ('', 'S', 'M', 'L', 'XL', '2XL', '3XL') ]
  
  class RegistrationForm(FlaskForm):
      name = TextField()
      username = TextField('FreeBSD username (if you have one)')
      host = SelectField(coerce = int)
      email = TextField('Email address')
      address = TextField(widget = TextArea(), validators = [ Required() ])
      arrival = DateField('Arrival date (or empty if local)',
                          validators = [ Optional() ])
      departure = DateField('Departure date (or empty if local)',
                            validators = [ Optional() ])
      shirt_size = SelectField(choices = shirt_choices)
      dietary_needs = TextField()
  
      def validate(self):
          if not FlaskForm.validate(self):
              return False
  
          if self.username.data == '' and self.host.data == -1:
              self.host.errors.append(
                      "Guests without a FreeBSD username require a host")
              return False
  
          if self.username.data != '' and self.host.data != -1:
              self.host.errors.append(
                      "People with @FreeBSD.org usernames do not require a host")
              return False
  
          return True
  
subject: Clarify that locals don’t need dates.