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import re
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import time
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import hashlib
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from django import forms
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from django.forms.util import ErrorList
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from django.utils.translation import ugettext_lazy as _
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from boards.mdx_neboard import formatters
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from boards.models.post import TITLE_MAX_LENGTH
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from boards.models import PostImage
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from neboard import settings
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from boards import utils
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import boards.settings as board_settings
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VETERAN_POSTING_DELAY = 5
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ATTRIBUTE_PLACEHOLDER = 'placeholder'
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LAST_POST_TIME = 'last_post_time'
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LAST_LOGIN_TIME = 'last_login_time'
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TEXT_PLACEHOLDER = _('''Type message here. Use formatting panel for more advanced usage.''')
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TAGS_PLACEHOLDER = _('tag1 several_words_tag')
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ERROR_IMAGE_DUPLICATE = _('Such image was already posted')
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LABEL_TITLE = _('Title')
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LABEL_TEXT = _('Text')
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LABEL_TAG = _('Tag')
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LABEL_SEARCH = _('Search')
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TAG_MAX_LENGTH = 20
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REGEX_TAG = r'^[\w\d]+$'
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class FormatPanel(forms.Textarea):
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def render(self, name, value, attrs=None):
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output = '<div id="mark-panel">'
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for formatter in formatters:
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output += '<span class="mark_btn"' + \
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' onClick="addMarkToMsg(\'' + formatter.format_left + \
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'\', \'' + formatter.format_right + '\')">' + \
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formatter.preview_left + formatter.name + \
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formatter.preview_right + '</span>'
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output += '</div>'
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output += super(FormatPanel, self).render(name, value, attrs=None)
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return output
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class PlainErrorList(ErrorList):
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def __unicode__(self):
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return self.as_text()
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def as_text(self):
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return ''.join(['(!) %s ' % e for e in self])
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class NeboardForm(forms.Form):
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def as_div(self):
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"""
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Returns this form rendered as HTML <as_div>s.
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"""
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return self._html_output(
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# TODO Do not show hidden rows in the list here
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normal_row='<div class="form-row"><div class="form-label">'
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'%(label)s'
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'</div></div>'
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'<div class="form-row"><div class="form-input">'
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'%(field)s'
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'</div></div>'
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'<div class="form-row">'
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'%(help_text)s'
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'</div>',
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error_row='<div class="form-row">'
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'<div class="form-label"></div>'
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'<div class="form-errors">%s</div>'
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'</div>',
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row_ender='</div>',
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help_text_html='%s',
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errors_on_separate_row=True)
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def as_json_errors(self):
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errors = []
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for name, field in list(self.fields.items()):
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if self[name].errors:
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errors.append({
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'field': name,
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'errors': self[name].errors.as_text(),
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})
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return errors
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class PostForm(NeboardForm):
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title = forms.CharField(max_length=TITLE_MAX_LENGTH, required=False,
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label=LABEL_TITLE)
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text = forms.CharField(
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widget=FormatPanel(attrs={ATTRIBUTE_PLACEHOLDER: TEXT_PLACEHOLDER}),
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required=False, label=LABEL_TEXT)
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image = forms.ImageField(required=False, label=_('Image'),
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widget=forms.ClearableFileInput(
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attrs={'accept': 'image/*'}))
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# This field is for spam prevention only
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email = forms.CharField(max_length=100, required=False, label=_('e-mail'),
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widget=forms.TextInput(attrs={
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'class': 'form-email'}))
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session = None
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need_to_ban = False
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def clean_title(self):
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title = self.cleaned_data['title']
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if title:
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if len(title) > TITLE_MAX_LENGTH:
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raise forms.ValidationError(_('Title must have less than %s '
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'characters') %
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str(TITLE_MAX_LENGTH))
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return title
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def clean_text(self):
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text = self.cleaned_data['text'].strip()
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if text:
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if len(text) > board_settings.MAX_TEXT_LENGTH:
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raise forms.ValidationError(_('Text must have less than %s '
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'characters') %
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str(board_settings
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.MAX_TEXT_LENGTH))
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return text
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def clean_image(self):
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image = self.cleaned_data['image']
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if image:
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if image.size > board_settings.MAX_IMAGE_SIZE:
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raise forms.ValidationError(
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_('Image must be less than %s bytes')
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% str(board_settings.MAX_IMAGE_SIZE))
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md5 = hashlib.md5()
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for chunk in image.chunks():
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md5.update(chunk)
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image_hash = md5.hexdigest()
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if PostImage.objects.filter(hash=image_hash).exists():
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raise forms.ValidationError(ERROR_IMAGE_DUPLICATE)
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return image
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def clean(self):
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cleaned_data = super(PostForm, self).clean()
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if not self.session:
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raise forms.ValidationError('Humans have sessions')
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if cleaned_data['email']:
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self.need_to_ban = True
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raise forms.ValidationError('A human cannot enter a hidden field')
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if not self.errors:
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self._clean_text_image()
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if not self.errors and self.session:
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self._validate_posting_speed()
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return cleaned_data
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def _clean_text_image(self):
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text = self.cleaned_data.get('text')
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image = self.cleaned_data.get('image')
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if (not text) and (not image):
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error_message = _('Either text or image must be entered.')
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self._errors['text'] = self.error_class([error_message])
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def _validate_posting_speed(self):
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can_post = True
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posting_delay = settings.POSTING_DELAY
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if board_settings.LIMIT_POSTING_SPEED and LAST_POST_TIME in \
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self.session:
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now = time.time()
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last_post_time = self.session[LAST_POST_TIME]
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current_delay = int(now - last_post_time)
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if current_delay < posting_delay:
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error_message = _('Wait %s seconds after last posting') % str(
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posting_delay - current_delay)
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self._errors['text'] = self.error_class([error_message])
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can_post = False
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if can_post:
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self.session[LAST_POST_TIME] = time.time()
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class ThreadForm(PostForm):
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regex_tags = re.compile(r'^[\w\s\d]+$', re.UNICODE)
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tags = forms.CharField(
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widget=forms.TextInput(attrs={ATTRIBUTE_PLACEHOLDER: TAGS_PLACEHOLDER}),
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max_length=100, label=_('Tags'), required=True)
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def clean_tags(self):
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tags = self.cleaned_data['tags'].strip()
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if not tags or not self.regex_tags.match(tags):
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raise forms.ValidationError(
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_('Inappropriate characters in tags.'))
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return tags
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def clean(self):
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cleaned_data = super(ThreadForm, self).clean()
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return cleaned_data
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class SettingsForm(NeboardForm):
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theme = forms.ChoiceField(choices=settings.THEMES,
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label=_('Theme'))
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class AddTagForm(NeboardForm):
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tag = forms.CharField(max_length=TAG_MAX_LENGTH, label=LABEL_TAG)
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method = forms.CharField(widget=forms.HiddenInput(), initial='add_tag')
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def clean_tag(self):
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tag = self.cleaned_data['tag']
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regex_tag = re.compile(REGEX_TAG, re.UNICODE)
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if not regex_tag.match(tag):
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raise forms.ValidationError(_('Inappropriate characters in tags.'))
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return tag
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def clean(self):
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cleaned_data = super(AddTagForm, self).clean()
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return cleaned_data
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class SearchForm(NeboardForm):
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query = forms.CharField(max_length=500, label=LABEL_SEARCH, required=False)
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class LoginForm(NeboardForm):
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password = forms.CharField()
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session = None
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def clean_password(self):
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password = self.cleaned_data['password']
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if board_settings.MASTER_PASSWORD != password:
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raise forms.ValidationError(_('Invalid master password'))
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return password
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def _validate_login_speed(self):
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can_post = True
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if LAST_LOGIN_TIME in self.session:
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now = time.time()
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last_login_time = self.session[LAST_LOGIN_TIME]
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current_delay = int(now - last_login_time)
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if current_delay < board_settings.LOGIN_TIMEOUT:
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error_message = _('Wait %s minutes after last login') % str(
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(board_settings.LOGIN_TIMEOUT - current_delay) / 60)
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self._errors['password'] = self.error_class([error_message])
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can_post = False
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if can_post:
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self.session[LAST_LOGIN_TIME] = time.time()
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def clean(self):
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self._validate_login_speed()
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cleaned_data = super(LoginForm, self).clean()
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return cleaned_data
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