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from django import forms
import re
from django.utils.translation import ugettext as _
from django.utils.safestring import mark_safe
from django.conf import settings
from django.http import str_to_unicode
from django.contrib.auth.models import User
import logging
import urllib
DEFAULT_NEXT = '/' + getattr(settings, 'FORUM_SCRIPT_ALIAS')
def clean_next(next):
if next is None:
return DEFAULT_NEXT
next = str_to_unicode(urllib.unquote(next), 'utf-8')
next = next.strip()
if next.startswith('/'):
logging.debug('next url is %s' % next)
return next
logging.debug('next url is %s' % DEFAULT_NEXT)
return DEFAULT_NEXT
def get_next_url(request):
return clean_next(request.REQUEST.get('next'))
class StrippedNonEmptyCharField(forms.CharField):
def clean(self,value):
value = value.strip()
if self.required and value == '':
raise forms.ValidationError(_('this field is required'))
return value
class NextUrlField(forms.CharField):
def __init__(self):
super(NextUrlField,self).__init__(max_length = 255,widget = forms.HiddenInput(),required = False)
def clean(self,value):
return clean_next(value)
login_form_widget_attrs = { 'class': 'required login' }
username_re = re.compile(r'^[\w ]+$')
class UserNameField(StrippedNonEmptyCharField):
RESERVED_NAMES = (u'fuck', u'shit', u'ass', u'sex', u'add',
u'edit', u'save', u'delete', u'manage', u'update', 'remove', 'new')
def __init__(self,db_model=User, db_field='username', must_exist=False,skip_clean=False,label=_('choose a username'),**kw):
self.must_exist = must_exist
self.skip_clean = skip_clean
self.db_model = db_model
self.db_field = db_field
error_messages={'required':_('user name is required'),
'taken':_('sorry, this name is taken, please choose another'),
'forbidden':_('sorry, this name is not allowed, please choose another'),
'missing':_('sorry, there is no user with this name'),
'multiple-taken':_('sorry, we have a serious error - user name is taken by several users'),
'invalid':_('user name can only consist of letters, empty space and underscore'),
}
if 'error_messages' in kw:
error_messages.update(kw['error_messages'])
del kw['error_messages']
super(UserNameField,self).__init__(max_length=30,
widget=forms.TextInput(attrs=login_form_widget_attrs),
label=label,
error_messages=error_messages,
**kw
)
def clean(self,username):
""" validate username """
if self.skip_clean == True:
logging.debug('username accepted with no validation')
return username
if hasattr(self, 'user_instance') and isinstance(self.user_instance, User):
if username == self.user_instance.username:
logging.debug('username valid')
return username
try:
username = super(UserNameField, self).clean(username)
except forms.ValidationError:
raise forms.ValidationError(self.error_messages['required'])
if self.required and not username_re.search(username):
raise forms.ValidationError(self.error_messages['invalid'])
if username in self.RESERVED_NAMES:
raise forms.ValidationError(self.error_messages['forbidden'])
try:
user = self.db_model.objects.get(
**{'%s' % self.db_field : username}
)
if user:
if self.must_exist:
logging.debug('user exists and name accepted b/c here we validate existing user')
return username
else:
raise forms.ValidationError(self.error_messages['taken'])
except self.db_model.DoesNotExist:
if self.must_exist:
logging.debug('user must exist, so raising the error')
raise forms.ValidationError(self.error_messages['missing'])
else:
logging.debug('user name valid!')
return username
except self.db_model.MultipleObjectsReturned:
logging.debug('error - user with this name already exists')
raise forms.ValidationError(self.error_messages['multiple-taken'])
class UserEmailField(forms.EmailField):
def __init__(self,skip_clean=False,**kw):
self.skip_clean = skip_clean
super(UserEmailField,self).__init__(widget=forms.TextInput(attrs=dict(login_form_widget_attrs,
maxlength=200)), label=mark_safe(_('your email address')),
error_messages={'required':_('email address is required'),
'invalid':_('please enter a valid email address'),
'taken':_('this email is already used by someone else, please choose another'),
},
**kw
)
def clean(self,email):
""" validate if email exist in database
from legacy register
return: raise error if it exist """
email = super(UserEmailField,self).clean(email.strip())
if self.skip_clean:
return email
if settings.EMAIL_UNIQUE == True:
try:
user = User.objects.get(email = email)
logging.debug('email taken')
raise forms.ValidationError(self.error_messages['taken'])
except User.DoesNotExist:
logging.debug('email valid')
return email
except User.MultipleObjectsReturned:
logging.debug('email taken many times over')
raise forms.ValidationError(self.error_messages['taken'])
else:
return email
class SetPasswordForm(forms.Form):
password1 = forms.CharField(widget=forms.PasswordInput(attrs=login_form_widget_attrs),
label=_('choose password'),
error_messages={'required':_('password is required')},
)
password2 = forms.CharField(widget=forms.PasswordInput(attrs=login_form_widget_attrs),
label=mark_safe(_('retype password')),
error_messages={'required':_('please, retype your password'),
'nomatch':_('sorry, entered passwords did not match, please try again')},
)
def clean_password2(self):
"""
Validates that the two password inputs match.
"""
if 'password1' in self.cleaned_data:
if self.cleaned_data['password1'] == self.cleaned_data['password2']:
self.password = self.cleaned_data['password2']
self.cleaned_data['password'] = self.cleaned_data['password2']
return self.cleaned_data['password2']
else:
del self.cleaned_data['password2']
raise forms.ValidationError(self.fields['password2'].error_messages['nomatch'])
else:
return self.cleaned_data['password2']
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