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from datetime import datetime, timedelta
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import hashlib
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from django.db import transaction
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from django.db.models import Count
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from django.template import RequestContext
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from django.utils import timezone
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from django.views.generic import View
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from boards import utils
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from boards.models import User, Post
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from boards.models.post import SETTING_MODERATE
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from boards.models.user import RANK_USER, Ban
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import neboard
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BAN_REASON_SPAM = 'Autoban: spam bot'
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OLD_USER_AGE_DAYS = 90
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PARAMETER_FORM = 'form'
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class BaseBoardView(View):
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def get_context_data(self, **kwargs):
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request = kwargs['request']
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context = self._default_context(request)
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context['version'] = neboard.settings.VERSION
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context['site_name'] = neboard.settings.SITE_NAME
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return context
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def _default_context(self, request):
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"""Create context with default values that are used in most views"""
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context = RequestContext(request)
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user = self._get_user(request)
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context['user'] = user
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context['tags'] = user.get_sorted_fav_tags()
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context['posts_per_day'] = float(Post.objects.get_posts_per_day())
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theme = self._get_theme(request, user)
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context['theme'] = theme
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context['theme_css'] = 'css/' + theme + '/base_page.css'
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# This shows the moderator panel
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moderate = user.get_setting(SETTING_MODERATE)
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if moderate == 'True':
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context['moderator'] = user.is_moderator()
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else:
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context['moderator'] = False
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return context
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def _get_user(self, request):
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"""
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Get current user from the session. If the user does not exist, create
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a new one.
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"""
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session = request.session
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if not 'user_id' in session:
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request.session.save()
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md5 = hashlib.md5()
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md5.update(session.session_key)
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new_id = md5.hexdigest()
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while User.objects.filter(user_id=new_id).exists():
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md5.update(str(timezone.now()))
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new_id = md5.hexdigest()
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time_now = timezone.now()
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user = User.objects.create(user_id=new_id, rank=RANK_USER,
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registration_time=time_now)
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self._delete_old_users()
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session['user_id'] = user.id
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else:
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user = User.objects.get(id=session['user_id'])
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return user
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def _get_theme(self, request, user=None):
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"""
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Get user's CSS theme
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"""
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if not user:
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user = self._get_user(request)
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theme = user.get_setting('theme')
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if not theme:
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theme = neboard.settings.DEFAULT_THEME
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return theme
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def _delete_old_users(self):
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"""
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Delete users with no favorite tags and posted messages. These can be spam
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bots or just old user accounts
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"""
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old_registration_date = datetime.now().date() - timedelta(
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OLD_USER_AGE_DAYS)
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for user in User.objects.annotate(tags_count=Count('fav_tags')).filter(
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tags_count=0).filter(
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registration_time__lt=old_registration_date):
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if not Post.objects.filter(user=user).exists():
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user.delete()
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@transaction.atomic
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def _ban_current_user(self, request):
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"""
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Add current user to the IP ban list
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"""
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ip = utils.get_client_ip(request)
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ban, created = Ban.objects.get_or_create(ip=ip)
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if created:
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ban.can_read = False
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ban.reason = BAN_REASON_SPAM
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ban.save()
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