tildetown-admin/ttadmin/guestbook/forms.py

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2016-12-20 06:00:00 +00:00
from datetime import datetime, timedelta
from django.core.exceptions import ValidationError
from django.forms import Form, CharField, EmailField, Textarea, ChoiceField
from common.forms import CaptchaField
# this should go in something like redis. I refuse, however, to involve redis
# in all of this until i have 2-3 more usecases.
# TODO generalize
submission_throttle = {}
def throttle_submission(name):
last_submission = submission_throttle.get(name)
now = datetime.now()
if last_submission is None\
or now - last_submission > timedelta(minutes=30):
submission_throttle[name] = datetime.now()
else:
raise ValidationError('you have submitted pretty recently. try again in a bit.')
def validate_msg_text(msg):
if len(msg) == 0:
raise ValidationError('message cannot be empty')
if len(msg) > 500:
raise ValidationError('too long')
class GuestbookForm(Form):
name = CharField(label='name!')
msg = CharField(
widget=Textarea,
label="message!",
validators=(validate_msg_text,),
)
captcha = CaptchaField()
def clean(self):
result = super().clean()
throttle_submission(result['name'])
if self.errors:
raise ValidationError('oops, looks like there were some problems below.')
return result