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import logging
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import time
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import hashlib
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import pytz
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import re
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from PIL import Image
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from django import forms
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from django.core.cache import cache
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from django.core.files.images import get_image_dimensions
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from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
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from django.forms.utils import ErrorList
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from django.utils.translation import ugettext_lazy as _, ungettext_lazy
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import boards.settings as board_settings
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from boards import utils
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from boards.abstracts.constants import REGEX_TAGS
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from boards.abstracts.settingsmanager import get_settings_manager
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from boards.abstracts.sticker_factory import get_attachment_by_alias
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from boards.forms.fields import UrlFileField
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from boards.mdx_neboard import formatters
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from boards.models import Attachment
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from boards.models import Tag
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from boards.models.attachment import StickerPack
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from boards.models.attachment.downloaders import download, REGEX_MAGNET
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from boards.models.attachment.viewers import FILE_TYPES_IMAGE
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from boards.models.post import TITLE_MAX_LENGTH
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from boards.utils import validate_file_size, get_file_mimetype, \
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FILE_EXTENSION_DELIMITER, get_tripcode_from_text
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SECTION_FORMS = 'Forms'
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POW_HASH_LENGTH = 16
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POW_LIFE_MINUTES = 5
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REGEX_USERNAMES = re.compile(r'^[\w\s\d,]+$', re.UNICODE)
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REGEX_URL = re.compile(r'^(http|https|ftp):\/\/', re.UNICODE)
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VETERAN_POSTING_DELAY = 5
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ATTRIBUTE_PLACEHOLDER = 'placeholder'
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ATTRIBUTE_ROWS = 'rows'
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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 = _('music images i_dont_like_tags')
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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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LABEL_FILE = _('File')
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LABEL_DUPLICATES = _('Check for duplicates')
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LABEL_URL = _('Do not download URLs')
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ERROR_SPEED = 'Please wait %(delay)d second before sending message'
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ERROR_SPEED_PLURAL = 'Please wait %(delay)d seconds before sending message'
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ERROR_MANY_FILES = 'You can post no more than %(files)d file.'
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ERROR_MANY_FILES_PLURAL = 'You can post no more than %(files)d files.'
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ERROR_DUPLICATES = 'Some files are already present on the board.'
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TAG_MAX_LENGTH = 20
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TEXTAREA_ROWS = 4
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TRIPCODE_DELIM = '##'
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# TODO Maybe this may be converted into the database table?
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MIMETYPE_EXTENSIONS = {
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'image/jpeg': 'jpeg',
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'image/png': 'png',
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'image/gif': 'gif',
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'video/webm': 'webm',
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'application/pdf': 'pdf',
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'x-diff': 'diff',
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'image/svg+xml': 'svg',
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'application/x-shockwave-flash': 'swf',
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'image/x-ms-bmp': 'bmp',
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'image/bmp': 'bmp',
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}
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DOWN_MODE_DOWNLOAD = 'DOWNLOAD'
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DOWN_MODE_DOWNLOAD_UNIQUE = 'DOWNLOAD_UNIQUE'
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DOWN_MODE_URL = 'URL'
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DOWN_MODE_TRY = 'TRY'
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logger = logging.getLogger('boards.forms')
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def get_timezones():
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timezones = []
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for tz in pytz.common_timezones:
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timezones.append((tz, tz),)
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return timezones
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class FormatPanel(forms.Textarea):
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"""
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Panel for text formatting. Consists of buttons to add different tags to the
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form text area.
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"""
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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=attrs)
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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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"""
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Form with neboard-specific formatting.
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"""
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required_css_class = 'required-field'
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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">'
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'<div class="form-label">'
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'%(label)s'
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'</div>'
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'<div class="form-input">'
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'%(field)s'
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'</div>'
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'</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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widget=forms.TextInput(
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attrs={ATTRIBUTE_PLACEHOLDER: 'Title{}tripcode'.format(TRIPCODE_DELIM)}))
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text = forms.CharField(
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widget=FormatPanel(attrs={
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ATTRIBUTE_PLACEHOLDER: TEXT_PLACEHOLDER,
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ATTRIBUTE_ROWS: TEXTAREA_ROWS,
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}),
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required=False, label=LABEL_TEXT)
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download_mode = forms.ChoiceField(
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choices=(
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(DOWN_MODE_TRY, _('Download or insert as URLs')),
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(DOWN_MODE_DOWNLOAD, _('Download')),
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(DOWN_MODE_DOWNLOAD_UNIQUE, _('Download and check for uniqueness')),
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(DOWN_MODE_URL, _('Insert as URLs')),
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),
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initial=DOWN_MODE_TRY,
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label=_('File process mode'))
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file = UrlFileField(required=False, label=LABEL_FILE)
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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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subscribe = forms.BooleanField(required=False, label=_('Subscribe to thread'))
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guess = forms.CharField(widget=forms.HiddenInput(), required=False)
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timestamp = forms.CharField(widget=forms.HiddenInput(), required=False)
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iteration = forms.CharField(widget=forms.HiddenInput(), required=False)
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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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max_length = board_settings.get_int(SECTION_FORMS, 'MaxTextLength')
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if len(text) > max_length:
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raise forms.ValidationError(_('Text must have less than %s '
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'characters') % str(max_length))
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return text
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def clean_file(self):
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return self._clean_files(self.cleaned_data['file'])
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def clean(self):
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cleaned_data = super(PostForm, self).clean()
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if cleaned_data['email']:
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if board_settings.get_bool(SECTION_FORMS, 'Autoban'):
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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_file()
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limit_speed = board_settings.get_bool(SECTION_FORMS, 'LimitPostingSpeed')
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limit_first = board_settings.get_bool(SECTION_FORMS, 'LimitFirstPosting')
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settings_manager = get_settings_manager(self)
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if not self.errors and limit_speed or (limit_first and not settings_manager.get_setting('confirmed_user')):
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pow_difficulty = board_settings.get_int(SECTION_FORMS, 'PowDifficulty')
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if pow_difficulty > 0:
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# PoW-based
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if cleaned_data['timestamp'] \
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and cleaned_data['iteration'] and cleaned_data['guess'] \
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and not settings_manager.get_setting('confirmed_user'):
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self._validate_hash(cleaned_data['timestamp'], cleaned_data['iteration'], cleaned_data['guess'], cleaned_data['text'])
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else:
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# Time-based
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self._validate_posting_speed()
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settings_manager.set_setting('confirmed_user', True)
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if self.cleaned_data['download_mode'] == DOWN_MODE_DOWNLOAD_UNIQUE:
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self._check_file_duplicates(self.get_files())
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return cleaned_data
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def get_files(self):
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"""
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Gets file from form or URL.
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"""
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files = []
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for file in self.cleaned_data['file']:
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if isinstance(file, UploadedFile):
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files.append(file)
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return files
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def get_file_urls(self):
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files = []
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for file in self.cleaned_data['file']:
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if type(file) == str:
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files.append(file)
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return files
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def get_tripcode(self):
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title = self.cleaned_data['title']
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if title is not None and TRIPCODE_DELIM in title:
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tripcode = get_tripcode_from_text(title.split(TRIPCODE_DELIM, maxsplit=1)[1])
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else:
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tripcode = ''
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return tripcode
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def get_title(self):
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title = self.cleaned_data['title']
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if title is not None and TRIPCODE_DELIM in title:
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return title.split(TRIPCODE_DELIM, maxsplit=1)[0]
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else:
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return title
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def get_images(self):
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return self.cleaned_data.get('stickers', [])
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def is_subscribe(self):
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return self.cleaned_data['subscribe']
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def _update_file_extension(self, file):
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if file:
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mimetype = get_file_mimetype(file)
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extension = MIMETYPE_EXTENSIONS.get(mimetype)
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if extension:
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filename = file.name.split(FILE_EXTENSION_DELIMITER, 1)[0]
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new_filename = filename + FILE_EXTENSION_DELIMITER + extension
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file.name = new_filename
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else:
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logger.info('Unrecognized file mimetype: {}'.format(mimetype))
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def _clean_files(self, inputs):
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files = []
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max_file_count = board_settings.get_int(SECTION_FORMS, 'MaxFileCount')
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if len(inputs) > max_file_count:
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raise forms.ValidationError(
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ungettext_lazy(ERROR_MANY_FILES, ERROR_MANY_FILES,
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max_file_count) % {'files': max_file_count})
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for file_input in inputs:
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if isinstance(file_input, UploadedFile):
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files.append(self._clean_file_file(file_input))
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else:
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files.append(self._clean_file_url(file_input))
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for file in files:
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self._validate_image_dimensions(file)
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return files
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def _validate_image_dimensions(self, file):
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if isinstance(file, UploadedFile):
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mimetype = get_file_mimetype(file)
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if mimetype.split('/')[-1] in FILE_TYPES_IMAGE:
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Image.warnings.simplefilter('error', Image.DecompressionBombWarning)
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try:
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print(get_image_dimensions(file))
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except Exception:
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raise forms.ValidationError('Possible decompression bomb or large image.')
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def _clean_file_file(self, file):
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validate_file_size(file.size)
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self._update_file_extension(file)
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return file
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def _clean_file_url(self, url):
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file = None
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if url:
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mode = self.cleaned_data['download_mode']
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if mode == DOWN_MODE_URL:
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return url
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try:
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image = get_attachment_by_alias(url, self.session)
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if image is not None:
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if 'stickers' not in self.cleaned_data:
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self.cleaned_data['stickers'] = []
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self.cleaned_data['stickers'].append(image)
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return
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if file is None:
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file = self._get_file_from_url(url)
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if not file:
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raise forms.ValidationError(_('Invalid URL'))
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else:
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validate_file_size(file.size)
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self._update_file_extension(file)
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except forms.ValidationError as e:
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# Assume we will get the plain URL instead of a file and save it
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if mode == DOWN_MODE_TRY and (REGEX_URL.match(url) or REGEX_MAGNET.match(url)):
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logger.info('Error in forms: {}'.format(e))
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return url
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else:
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raise e
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return file
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def _clean_text_file(self):
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text = self.cleaned_data.get('text')
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file = self.get_files()
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file_url = self.get_file_urls()
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images = self.get_images()
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if (not text) and (not file) and (not file_url) and len(images) == 0:
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error_message = _('Either text or file must be entered.')
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self._add_general_error(error_message)
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def _get_cache_key(self, key):
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return '{}_{}'.format(self.session.session_key, key)
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def _set_session_cache(self, key, value):
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cache.set(self._get_cache_key(key), value)
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def _get_session_cache(self, key):
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return cache.get(self._get_cache_key(key))
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def _get_last_post_time(self):
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last = self._get_session_cache(LAST_POST_TIME)
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if last is None:
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last = self.session.get(LAST_POST_TIME)
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return last
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def _validate_posting_speed(self):
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can_post = True
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posting_delay = board_settings.get_int(SECTION_FORMS, 'PostingDelay')
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if board_settings.get_bool(SECTION_FORMS, 'LimitPostingSpeed'):
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now = time.time()
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current_delay = 0
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if LAST_POST_TIME not in self.session:
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self.session[LAST_POST_TIME] = now
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need_delay = True
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else:
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last_post_time = self._get_last_post_time()
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current_delay = int(now - last_post_time)
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need_delay = current_delay < posting_delay
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self._set_session_cache(LAST_POST_TIME, now)
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if need_delay:
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delay = posting_delay - current_delay
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|
|
error_message = ungettext_lazy(ERROR_SPEED, ERROR_SPEED_PLURAL,
|
|
|
delay) % {'delay': delay}
|
|
|
self._add_general_error(error_message)
|
|
|
|
|
|
can_post = False
|
|
|
|
|
|
if can_post:
|
|
|
self.session[LAST_POST_TIME] = now
|
|
|
else:
|
|
|
# Reset the time since posting failed
|
|
|
self._set_session_cache(LAST_POST_TIME, self.session[LAST_POST_TIME])
|
|
|
|
|
|
def _get_file_from_url(self, url: str) -> SimpleUploadedFile:
|
|
|
"""
|
|
|
Gets an file file from URL.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
return download(url)
|
|
|
except forms.ValidationError as e:
|
|
|
raise e
|
|
|
except Exception as e:
|
|
|
raise forms.ValidationError(e)
|
|
|
|
|
|
def _validate_hash(self, timestamp: str, iteration: str, guess: str, message: str):
|
|
|
payload = timestamp + message.replace('\r\n', '\n')
|
|
|
difficulty = board_settings.get_int(SECTION_FORMS, 'PowDifficulty')
|
|
|
target = str(int(2 ** (POW_HASH_LENGTH * 3) / difficulty))
|
|
|
if len(target) < POW_HASH_LENGTH:
|
|
|
target = '0' * (POW_HASH_LENGTH - len(target)) + target
|
|
|
|
|
|
computed_guess = hashlib.sha256((payload + iteration).encode())\
|
|
|
.hexdigest()[0:POW_HASH_LENGTH]
|
|
|
if guess != computed_guess or guess > target:
|
|
|
self._add_general_error(_('Invalid PoW.'))
|
|
|
|
|
|
def _check_file_duplicates(self, files):
|
|
|
for file in files:
|
|
|
file_hash = utils.get_file_hash(file)
|
|
|
if Attachment.objects.get_existing_duplicate(file_hash, file):
|
|
|
self._add_general_error(_(ERROR_DUPLICATES))
|
|
|
|
|
|
def _add_general_error(self, message):
|
|
|
self.add_error('text', forms.ValidationError(message))
|
|
|
|
|
|
|
|
|
class ThreadForm(PostForm):
|
|
|
|
|
|
tags = forms.CharField(
|
|
|
widget=forms.TextInput(attrs={ATTRIBUTE_PLACEHOLDER: TAGS_PLACEHOLDER}),
|
|
|
max_length=100, label=_('Tags'), required=True)
|
|
|
monochrome = forms.BooleanField(label=_('Monochrome'), required=False)
|
|
|
stickerpack = forms.BooleanField(label=_('Sticker Pack'), required=False)
|
|
|
|
|
|
def clean_tags(self):
|
|
|
tags = self.cleaned_data['tags'].strip()
|
|
|
|
|
|
if not tags or not REGEX_TAGS.match(tags):
|
|
|
raise forms.ValidationError(
|
|
|
_('Inappropriate characters in tags.'))
|
|
|
|
|
|
default_tag_name = board_settings.get(SECTION_FORMS, 'DefaultTag')\
|
|
|
.strip().lower()
|
|
|
|
|
|
required_tag_exists = False
|
|
|
tag_set = set()
|
|
|
for tag_string in tags.split():
|
|
|
tag_name = tag_string.strip().lower()
|
|
|
if tag_name == default_tag_name:
|
|
|
required_tag_exists = True
|
|
|
tag, created = Tag.objects.get_or_create_with_alias(
|
|
|
name=tag_name, required=True)
|
|
|
else:
|
|
|
tag, created = Tag.objects.get_or_create_with_alias(name=tag_name)
|
|
|
tag_set.add(tag)
|
|
|
|
|
|
# If this is a new tag, don't check for its parents because nobody
|
|
|
# added them yet
|
|
|
if not created:
|
|
|
tag_set |= set(tag.get_all_parents())
|
|
|
|
|
|
for tag in tag_set:
|
|
|
if tag.required:
|
|
|
required_tag_exists = True
|
|
|
break
|
|
|
|
|
|
# Use default tag if no section exists
|
|
|
if not required_tag_exists:
|
|
|
default_tag, created = Tag.objects.get_or_create_with_alias(
|
|
|
name=default_tag_name, required=True)
|
|
|
tag_set.add(default_tag)
|
|
|
|
|
|
return tag_set
|
|
|
|
|
|
def clean(self):
|
|
|
cleaned_data = super(ThreadForm, self).clean()
|
|
|
|
|
|
return cleaned_data
|
|
|
|
|
|
def is_monochrome(self):
|
|
|
return self.cleaned_data['monochrome']
|
|
|
|
|
|
def clean_stickerpack(self):
|
|
|
stickerpack = self.cleaned_data['stickerpack']
|
|
|
if stickerpack:
|
|
|
tripcode = self.get_tripcode()
|
|
|
if not tripcode:
|
|
|
raise forms.ValidationError(_(
|
|
|
'Tripcode should be specified to own a stickerpack.'))
|
|
|
title = self.get_title()
|
|
|
if not title:
|
|
|
raise forms.ValidationError(_(
|
|
|
'Title should be specified as a stickerpack name.'))
|
|
|
if not REGEX_TAGS.match(title):
|
|
|
raise forms.ValidationError(_('Inappropriate sticker pack name.'))
|
|
|
|
|
|
existing_pack = StickerPack.objects.filter(name=title).first()
|
|
|
if existing_pack:
|
|
|
if existing_pack.tripcode != tripcode:
|
|
|
raise forms.ValidationError(_(
|
|
|
'A sticker pack with this name already exists and is'
|
|
|
' owned by another tripcode.'))
|
|
|
if not existing_pack.tripcode:
|
|
|
raise forms.ValidationError(_(
|
|
|
'This sticker pack can only be updated by an '
|
|
|
'administrator.'))
|
|
|
|
|
|
return stickerpack
|
|
|
|
|
|
def is_stickerpack(self):
|
|
|
return self.cleaned_data['stickerpack']
|
|
|
|
|
|
|
|
|
class SettingsForm(NeboardForm):
|
|
|
|
|
|
theme = forms.ChoiceField(
|
|
|
choices=board_settings.get_list_dict('View', 'Themes'),
|
|
|
label=_('Theme'))
|
|
|
image_viewer = forms.ChoiceField(
|
|
|
choices=board_settings.get_list_dict('View', 'ImageViewers'),
|
|
|
label=_('Image view mode'))
|
|
|
username = forms.CharField(label=_('User name'), required=False)
|
|
|
timezone = forms.ChoiceField(choices=get_timezones(), label=_('Time zone'))
|
|
|
|
|
|
def clean_username(self):
|
|
|
username = self.cleaned_data['username']
|
|
|
|
|
|
if username and not REGEX_USERNAMES.match(username):
|
|
|
raise forms.ValidationError(_('Inappropriate characters.'))
|
|
|
|
|
|
return username
|
|
|
|
|
|
|
|
|
class SearchForm(NeboardForm):
|
|
|
query = forms.CharField(max_length=500, label=LABEL_SEARCH, required=False)
|
|
|
|
