Now image form field only accepts image files

boards/forms.py

@@ -1,351 +1,352 b''
 import re
 import time
 import hashlib
 
 from captcha.fields import CaptchaField
 from django import forms
 from django.forms.util import ErrorList
 from django.utils.translation import ugettext_lazy as _
 
 from boards.mdx_neboard import formatters
 from boards.models.post import TITLE_MAX_LENGTH
 from boards.models import User, Post
 from neboard import settings
 from boards import utils
 import boards.settings as board_settings
 
 VETERAN_POSTING_DELAY = 5
 
 ATTRIBUTE_PLACEHOLDER = 'placeholder'
 
 LAST_POST_TIME = 'last_post_time'
 LAST_LOGIN_TIME = 'last_login_time'
 TEXT_PLACEHOLDER = _('''Type message here. You can reply to message >>123 like
  this. 2 new lines are required to start new paragraph.''')
 TAGS_PLACEHOLDER = _('tag1 several_words_tag')
 
 ERROR_IMAGE_DUPLICATE = _('Such image was already posted')
 
 LABEL_TITLE = _('Title')
 LABEL_TEXT = _('Text')
 LABEL_TAG = _('Tag')
 
 TAG_MAX_LENGTH = 20
 
 REGEX_TAG = ur'^[\w\d]+$'
 
 
 class FormatPanel(forms.Textarea):
     def render(self, name, value, attrs=None):
         output = '<div id="mark-panel">'
         for formatter in formatters:
             output += u'<span class="mark_btn"' + \
                       u' onClick="addMarkToMsg(\'' + formatter.format_left + \
                       '\', \'' + formatter.format_right + '\')">' + \
                       formatter.preview_left + formatter.name + \
                       formatter.preview_right + u'</span>'
 
         output += '</div>'
         output += super(FormatPanel, self).render(name, value, attrs=None)
 
         return output
 
 
 class PlainErrorList(ErrorList):
     def __unicode__(self):
         return self.as_text()
 
     def as_text(self):
         return ''.join([u'(!) %s ' % e for e in self])
 
 
 class NeboardForm(forms.Form):
 
     def as_div(self):
         """
         Returns this form rendered as HTML <as_div>s.
         """
 
         return self._html_output(
             # TODO Do not show hidden rows in the list here
             normal_row='<div class="form-row">'
                        '<div class="form-label">'
                        '%(label)s'
                        '</div>'
                        '<div class="form-input">'
                        '%(field)s'
                        '</div>'
                        '%(help_text)s'
                        '</div>',
             error_row='<div class="form-row">'
                       '<div class="form-label"></div>'
                       '<div class="form-errors">%s</div>'
                       '</div>',
             row_ender='</div>',
             help_text_html='%s',
             errors_on_separate_row=True)
 
     def as_json_errors(self):
         errors = []
 
         for name, field in self.fields.items():
             if self[name].errors:
                 errors.append({
                     'field': name,
                     'errors': self[name].errors.as_text(),
                 })
 
         return errors
 
 
 class PostForm(NeboardForm):
 
     title = forms.CharField(max_length=TITLE_MAX_LENGTH, required=False,
                             label=LABEL_TITLE)
     text = forms.CharField(
         widget=FormatPanel(attrs={ATTRIBUTE_PLACEHOLDER: TEXT_PLACEHOLDER}),
         required=False, label=LABEL_TEXT)
-    image = forms.ImageField(required=False, label=_('Image'))
+    image = forms.ImageField(required=False, label=_('Image'),
+            widget=forms.ClearableFileInput(attrs={'accept': 'image/*'}))
 
     # This field is for spam prevention only
     email = forms.CharField(max_length=100, required=False, label=_('e-mail'),
                             widget=forms.TextInput(attrs={
                                 'class': 'form-email'}))
 
     session = None
     need_to_ban = False
 
     def clean_title(self):
         title = self.cleaned_data['title']
         if title:
             if len(title) > TITLE_MAX_LENGTH:
                 raise forms.ValidationError(_('Title must have less than %s '
                                               'characters') %
                                             str(TITLE_MAX_LENGTH))
         return title
 
     def clean_text(self):
         text = self.cleaned_data['text']
         if text:
             if len(text) > board_settings.MAX_TEXT_LENGTH:
                 raise forms.ValidationError(_('Text must have less than %s '
                                               'characters') %
                                             str(board_settings
                                             .MAX_TEXT_LENGTH))
         return text
 
     def clean_image(self):
         image = self.cleaned_data['image']
         if image:
             if image._size > board_settings.MAX_IMAGE_SIZE:
                 raise forms.ValidationError(
                     _('Image must be less than %s bytes')
                     % str(board_settings.MAX_IMAGE_SIZE))
 
             md5 = hashlib.md5()
             for chunk in image.chunks():
                 md5.update(chunk)
             image_hash = md5.hexdigest()
             if Post.objects.filter(image_hash=image_hash).exists():
                 raise forms.ValidationError(ERROR_IMAGE_DUPLICATE)
 
         return image
 
     def clean(self):
         cleaned_data = super(PostForm, self).clean()
 
         if not self.session:
             raise forms.ValidationError('Humans have sessions')
 
         if cleaned_data['email']:
             self.need_to_ban = True
             raise forms.ValidationError('A human cannot enter a hidden field')
 
         if not self.errors:
             self._clean_text_image()
 
         if not self.errors and self.session:
             self._validate_posting_speed()
 
         return cleaned_data
 
     def _clean_text_image(self):
         text = self.cleaned_data.get('text')
         image = self.cleaned_data.get('image')
 
         if (not text) and (not image):
             error_message = _('Either text or image must be entered.')
             self._errors['text'] = self.error_class([error_message])
 
     def _validate_posting_speed(self):
         can_post = True
 
         # TODO Remove this, it's only for test
         if not 'user_id' in self.session:
             return
 
         user = User.objects.get(id=self.session['user_id'])
         if user.is_veteran():
             posting_delay = VETERAN_POSTING_DELAY
         else:
             posting_delay = settings.POSTING_DELAY
 
         if LAST_POST_TIME in self.session:
             now = time.time()
             last_post_time = self.session[LAST_POST_TIME]
 
             current_delay = int(now - last_post_time)
 
             if current_delay < posting_delay:
                 error_message = _('Wait %s seconds after last posting') % str(
                     posting_delay - current_delay)
                 self._errors['text'] = self.error_class([error_message])
 
                 can_post = False
 
         if can_post:
             self.session[LAST_POST_TIME] = time.time()
 
 
 class ThreadForm(PostForm):
 
     regex_tags = re.compile(ur'^[\w\s\d]+$', re.UNICODE)
 
     tags = forms.CharField(
         widget=forms.TextInput(attrs={ATTRIBUTE_PLACEHOLDER: TAGS_PLACEHOLDER}),
         max_length=100, label=_('Tags'))
 
     def clean_tags(self):
         tags = self.cleaned_data['tags']
 
         if tags:
             if not self.regex_tags.match(tags):
                 raise forms.ValidationError(
                     _('Inappropriate characters in tags.'))
 
         return tags
 
     def clean(self):
         cleaned_data = super(ThreadForm, self).clean()
 
         return cleaned_data
 
 
 class PostCaptchaForm(PostForm):
     captcha = CaptchaField()
 
     def __init__(self, *args, **kwargs):
         self.request = kwargs['request']
         del kwargs['request']
 
         super(PostCaptchaForm, self).__init__(*args, **kwargs)
 
     def clean(self):
         cleaned_data = super(PostCaptchaForm, self).clean()
 
         success = self.is_valid()
         utils.update_captcha_access(self.request, success)
 
         if success:
             return cleaned_data
         else:
             raise forms.ValidationError(_("Captcha validation failed"))
 
 
 class ThreadCaptchaForm(ThreadForm):
     captcha = CaptchaField()
 
     def __init__(self, *args, **kwargs):
         self.request = kwargs['request']
         del kwargs['request']
 
         super(ThreadCaptchaForm, self).__init__(*args, **kwargs)
 
     def clean(self):
         cleaned_data = super(ThreadCaptchaForm, self).clean()
 
         success = self.is_valid()
         utils.update_captcha_access(self.request, success)
 
         if success:
             return cleaned_data
         else:
             raise forms.ValidationError(_("Captcha validation failed"))
 
 
 class SettingsForm(NeboardForm):
 
     theme = forms.ChoiceField(choices=settings.THEMES,
                               label=_('Theme'))
 
 
 class ModeratorSettingsForm(SettingsForm):
 
     moderate = forms.BooleanField(required=False, label=_('Enable moderation '
                                                           'panel'))
 
 
 class LoginForm(NeboardForm):
 
     user_id = forms.CharField()
 
     session = None
 
     def clean_user_id(self):
         user_id = self.cleaned_data['user_id']
         if user_id:
             users = User.objects.filter(user_id=user_id)
             if len(users) == 0:
                 raise forms.ValidationError(_('No such user found'))
 
         return user_id
 
     def _validate_login_speed(self):
         can_post = True
 
         if LAST_LOGIN_TIME in self.session:
             now = time.time()
             last_login_time = self.session[LAST_LOGIN_TIME]
 
             current_delay = int(now - last_login_time)
 
             if current_delay < board_settings.LOGIN_TIMEOUT:
                 error_message = _('Wait %s minutes after last login') % str(
                     (board_settings.LOGIN_TIMEOUT - current_delay) / 60)
                 self._errors['user_id'] = self.error_class([error_message])
 
                 can_post = False
 
         if can_post:
             self.session[LAST_LOGIN_TIME] = time.time()
 
     def clean(self):
         if not self.session:
             raise forms.ValidationError('Humans have sessions')
 
         self._validate_login_speed()
 
         cleaned_data = super(LoginForm, self).clean()
 
         return cleaned_data
 
 
 class AddTagForm(NeboardForm):
 
     tag = forms.CharField(max_length=TAG_MAX_LENGTH, label=LABEL_TAG)
     method = forms.CharField(widget=forms.HiddenInput(), initial='add_tag')
 
     def clean_tag(self):
         tag = self.cleaned_data['tag']
 
         regex_tag = re.compile(REGEX_TAG, re.UNICODE)
         if not regex_tag.match(tag):
             raise forms.ValidationError(_('Inappropriate characters in tags.'))
 
         return tag
 
     def clean(self):
         cleaned_data = super(AddTagForm, self).clean()
 
         return cleaned_data