forum/forms/general.py

   1 from django import forms
   2 import re
   3 from django.utils.translation import ugettext as _
   4 from django.utils.safestring import mark_safe
   5 from forum import settings
   6 from django.http import str_to_unicode
   7 from forum.models import User
   8 from forum.modules import call_all_handlers
   9 import urllib
  10 import logging
  11
  12 DEFAULT_NEXT = getattr(settings, 'APP_BASE_URL')
  13 def clean_next(next):
  14     if next is None:
  15         return DEFAULT_NEXT
  16     next = str_to_unicode(urllib.unquote(next), 'utf-8')
  17     next = next.strip()
  18     if next.startswith('/'):
  19         return next
  20     return DEFAULT_NEXT
  21
  22 def get_next_url(request):
  23     return clean_next(request.REQUEST.get('next'))
  24
  25 class StrippedNonEmptyCharField(forms.CharField):
  26     def clean(self,value):
  27         value = value.strip()
  28         if self.required and value == '':
  29             raise forms.ValidationError(_('this field is required'))
  30         return value
  31
  32 class NextUrlField(forms.CharField):
  33     def __init__(self):
  34         super(NextUrlField,self).__init__(max_length = 255,widget = forms.HiddenInput(),required = False)
  35     def clean(self,value):
  36         return clean_next(value)
  37
  38 login_form_widget_attrs = { 'class': 'required login' }
  39 username_re = re.compile(r'^[\w\s ]+$', re.UNICODE)
  40
  41 class UserNameField(StrippedNonEmptyCharField):
  42     def __init__(self,db_model=User, db_field='username', must_exist=False,skip_clean=False,label=_('choose a username'),**kw):
  43         self.must_exist = must_exist
  44         self.skip_clean = skip_clean
  45         self.db_model = db_model
  46         self.db_field = db_field
  47         error_messages={'required':_('user name is required'),
  48                         'taken':_('sorry, this name is taken, please choose another'),
  49                         'forbidden':_('sorry, this name is not allowed, please choose another'),
  50                         'missing':_('sorry, there is no user with this name'),
  51                         'multiple-taken':_('sorry, we have a serious error - user name is taken by several users'),
  52                         'invalid':_('user name can only consist of letters, empty space and underscore'),
  53                         'toshort':_('user name is to short, please use at least %d characters') % settings.MIN_USERNAME_LENGTH
  54                     }
  55         if 'error_messages' in kw:
  56             error_messages.update(kw['error_messages'])
  57             del kw['error_messages']
  58         super(UserNameField,self).__init__(max_length=30,
  59                 widget=forms.TextInput(attrs=login_form_widget_attrs),
  60                 label=label,
  61                 error_messages=error_messages,
  62                 **kw
  63                 )
  64
  65     def clean(self,username):
  66         """ validate username """
  67         if self.skip_clean == True:
  68             return username
  69         if hasattr(self, 'user_instance') and isinstance(self.user_instance, User):
  70             if username == self.user_instance.username:
  71                 return username
  72         try:
  73             username = super(UserNameField, self).clean(username)
  74         except forms.ValidationError:
  75             raise forms.ValidationError(self.error_messages['required'])
  76         if len(username) < settings.MIN_USERNAME_LENGTH:
  77             raise forms.ValidationError(self.error_messages['toshort'])
  78         if self.required and not username_re.match(username):
  79             raise forms.ValidationError(self.error_messages['invalid'])
  80         if username in settings.RESERVED_USERNAMES:
  81             raise forms.ValidationError(self.error_messages['forbidden'])
  82         try:
  83             user = self.db_model.objects.get(
  84                     **{'%s' % self.db_field : username}
  85             )
  86             if user:
  87                 if self.must_exist:
  88                     return username
  89                 else:
  90                     raise forms.ValidationError(self.error_messages['taken'])
  91         except self.db_model.DoesNotExist:
  92             if self.must_exist:
  93                 raise forms.ValidationError(self.error_messages['missing'])
  94             else:
  95                 return username
  96         except self.db_model.MultipleObjectsReturned:
  97             raise forms.ValidationError(self.error_messages['multiple-taken'])
  98
  99 class UserEmailField(forms.EmailField):
 100     def __init__(self,skip_clean=False,**kw):
 101         self.skip_clean = skip_clean
 102         super(UserEmailField,self).__init__(widget=forms.TextInput(attrs=dict(login_form_widget_attrs,
 103             maxlength=200)), label=mark_safe(_('your email address')),
 104             error_messages={'required':_('email address is required'),
 105                             'invalid':_('please enter a valid email address'),
 106                             'taken':_('this email is already used by someone else, please choose another'),
 107                             },
 108             **kw
 109             )
 110
 111     def clean(self,email):
 112         """ validate if email exist in database
 113         from legacy register
 114         return: raise error if it exist """
 115         email = super(UserEmailField,self).clean(email.strip())
 116         if self.skip_clean:
 117             return email
 118         if settings.EMAIL_UNIQUE == True:
 119             try:
 120                 user = User.objects.get(email = email)
 121                 raise forms.ValidationError(self.error_messages['taken'])
 122             except User.DoesNotExist:
 123                 return email
 124             except User.MultipleObjectsReturned:
 125                 raise forms.ValidationError(self.error_messages['taken'])
 126         else:
 127             return email
 128
 129 class SetPasswordForm(forms.Form):
 130     password1 = forms.CharField(widget=forms.PasswordInput(attrs=login_form_widget_attrs),
 131                                 label=_('choose password'),
 132                                 error_messages={'required':_('password is required')},
 133                                 )
 134     password2 = forms.CharField(widget=forms.PasswordInput(attrs=login_form_widget_attrs),
 135                                 label=mark_safe(_('retype password')),
 136                                 error_messages={'required':_('please, retype your password'),
 137                                                 'nomatch':_('sorry, entered passwords did not match, please try again')},
 138                                 )
 139
 140     def __init__(self, data=None, user=None, *args, **kwargs):
 141         super(SetPasswordForm, self).__init__(data, *args, **kwargs)
 142
 143     def clean_password2(self):
 144         """
 145         Validates that the two password inputs match.
 146
 147         """
 148         if 'password1' in self.cleaned_data:
 149             if self.cleaned_data['password1'] == self.cleaned_data['password2']:
 150                 self.password = self.cleaned_data['password2']
 151                 self.cleaned_data['password'] = self.cleaned_data['password2']
 152                 return self.cleaned_data['password2']
 153             else:
 154                 del self.cleaned_data['password2']
 155                 raise forms.ValidationError(self.fields['password2'].error_messages['nomatch'])
 156         else:
 157             return self.cleaned_data['password2']
 158
 159 class SimpleCaptchaForm(forms.Form):
 160     fields = {}
 161
 162     def __init__(self, *args, **kwargs):
 163         super(SimpleCaptchaForm, self).__init__(*args, **kwargs)
 164
 165         spam_fields = call_all_handlers('create_anti_spam_field')
 166         if spam_fields:
 167             spam_fields = dict(spam_fields)
 168             for name, field in spam_fields.items():
 169                 self.fields[name] = field
 170
 171             self._anti_spam_fields = spam_fields.keys()
 172         else:
 173             self._anti_spam_fields = []