Sith/com/views.py

# -*- coding:utf-8 -*
#
# Copyright 2016,2017
# - Skia <skia@libskia.so>
# - Sli <antoine@bartuccio.fr>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

from django.shortcuts import redirect, get_object_or_404
from django.http import HttpResponseRedirect
from django.views.generic import ListView, DetailView, View
from django.views.generic.edit import UpdateView, CreateView, DeleteView
from django.views.generic.detail import SingleObjectMixin
from django.utils.translation import ugettext_lazy as _
from django.core.urlresolvers import reverse, reverse_lazy
from django.core.exceptions import ValidationError
from django.utils import timezone
from django.conf import settings
from django.db.models import Max
from django.forms.models import modelform_factory
from django.core.exceptions import PermissionDenied
from django import forms

from datetime import timedelta

from com.models import Sith, News, NewsDate, Weekmail, WeekmailArticle, Screen, Poster
from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin, TabedViewMixin, CanCreateMixin, QuickNotifMixin
from core.views.forms import SelectDateTime
from core.models import Notification, RealGroup, User
from club.models import Club, Mailing


# Sith object

sith = Sith.objects.first


class PosterForm(forms.ModelForm):
    class Meta:
        model = Poster
        fields = ['name', 'file', 'club', 'screens', 'date_begin', 'date_end', 'display_time']
        widgets = {
            'screens': forms.CheckboxSelectMultiple,
            'is_moderated': forms.HiddenInput()
        }

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user', None)
        super(PosterForm, self).__init__(*args, **kwargs)
        if self.user:
            if not self.user.is_com_admin:
                self.fields['club'].queryset = Club.objects.filter(id__in=self.user.clubs_with_rights)


class ComTabsMixin(TabedViewMixin):
    def get_tabs_title(self):
        return _("Communication administration")

    def get_list_of_tabs(self):
        tab_list = []
        tab_list.append({
            'url': reverse('com:weekmail'),
            'slug': 'weekmail',
                    'name': _("Weekmail"),
        })
        tab_list.append({
            'url': reverse('com:weekmail_destinations'),
            'slug': 'weekmail_destinations',
                    'name': _("Weekmail destinations"),
        })
        tab_list.append({
            'url': reverse('com:index_edit'),
            'slug': 'index',
                    'name': _("Index page"),
        })
        tab_list.append({
            'url': reverse('com:info_edit'),
            'slug': 'info',
                    'name': _("Info message"),
        })
        tab_list.append({
            'url': reverse('com:alert_edit'),
            'slug': 'alert',
                    'name': _("Alert message"),
        })
        tab_list.append({
            'url': reverse('com:mailing_admin'),
            'slug': 'mailings',
                    'name': _("Mailing lists administration"),
        })
        tab_list.append({
            'url': reverse('com:poster_list'),
            'slug': 'posters',
                    'name': _("Posters list"),
        })
        tab_list.append({
            'url': reverse('com:screen_list'),
            'slug': 'screens',
                    'name': _("Screens list"),
        })
        return tab_list


class IsComAdminMixin(View):

    def dispatch(self, request, *args, **kwargs):
        if not (request.user.is_in_group(settings.SITH_GROUP_COM_ADMIN_ID)):
            raise PermissionDenied
        return super(IsComAdminMixin, self).dispatch(request, *args, **kwargs)


class ComEditView(ComTabsMixin, CanEditPropMixin, UpdateView):
    model = Sith
    template_name = 'core/edit.jinja'

    def get_object(self, queryset=None):
        return Sith.objects.first()


class AlertMsgEditView(ComEditView):
    fields = ['alert_msg']
    current_tab = "alert"
    success_url = reverse_lazy('com:alert_edit')


class InfoMsgEditView(ComEditView):
    fields = ['info_msg']
    current_tab = "info"
    success_url = reverse_lazy('com:info_edit')


class IndexEditView(ComEditView):
    fields = ['index_page']
    current_tab = "index"
    success_url = reverse_lazy('com:index_edit')


class WeekmailDestinationEditView(ComEditView):
    fields = ['weekmail_destinations']
    current_tab = "weekmail_destinations"
    success_url = reverse_lazy('com:weekmail_destinations')

# News


class NewsForm(forms.ModelForm):
    class Meta:
        model = News
        fields = ['type', 'title', 'club', 'summary', 'content', 'author']
        widgets = {
            'author': forms.HiddenInput,
            'type': forms.RadioSelect,
        }
    start_date = forms.DateTimeField(['%Y-%m-%d %H:%M:%S'], label=_("Start date"), widget=SelectDateTime, required=False)
    end_date = forms.DateTimeField(['%Y-%m-%d %H:%M:%S'], label=_("End date"), widget=SelectDateTime, required=False)
    until = forms.DateTimeField(['%Y-%m-%d %H:%M:%S'], label=_("Until"), widget=SelectDateTime, required=False)
    automoderation = forms.BooleanField(label=_("Automoderation"), required=False)

    def clean(self):
        self.cleaned_data = super(NewsForm, self).clean()
        if self.cleaned_data['type'] != "NOTICE":
            if not self.cleaned_data['start_date']:
                self.add_error('start_date', ValidationError(_("This field is required.")))
            if not self.cleaned_data['end_date']:
                self.add_error('end_date', ValidationError(_("This field is required.")))
            if self.cleaned_data['start_date'] > self.cleaned_data['end_date']:
                self.add_error('end_date', ValidationError(_("You crazy? You can not finish an event before starting it.")))
            if self.cleaned_data['type'] == "WEEKLY" and not self.cleaned_data['until']:
                self.add_error('until', ValidationError(_("This field is required.")))
        return self.cleaned_data

    def save(self):
        ret = super(NewsForm, self).save()
        self.instance.dates.all().delete()
        if self.instance.type == "EVENT" or self.instance.type == "CALL":
            NewsDate(start_date=self.cleaned_data['start_date'],
                     end_date=self.cleaned_data['end_date'],
                     news=self.instance).save()
        elif self.instance.type == "WEEKLY":
            start_date = self.cleaned_data['start_date']
            end_date = self.cleaned_data['end_date']
            while start_date <= self.cleaned_data['until']:
                NewsDate(start_date=start_date,
                         end_date=end_date,
                         news=self.instance).save()
                start_date += timedelta(days=7)
                end_date += timedelta(days=7)
        return ret


class NewsEditView(CanEditMixin, UpdateView):
    model = News
    form_class = NewsForm
    template_name = 'com/news_edit.jinja'
    pk_url_kwarg = 'news_id'

    def get_initial(self):
        init = {}
        try:
            init['start_date'] = self.object.dates.order_by('id').first().start_date.strftime('%Y-%m-%d %H:%M:%S')
        except:
            pass
        try:
            init['end_date'] = self.object.dates.order_by('id').first().end_date.strftime('%Y-%m-%d %H:%M:%S')
        except:
            pass
        return init

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        if form.is_valid() and 'preview' not in request.POST.keys():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

    def form_valid(self, form):
        self.object = form.save()
        if form.cleaned_data['automoderation'] and self.request.user.is_in_group(settings.SITH_GROUP_COM_ADMIN_ID):
            self.object.moderator = self.request.user
            self.object.is_moderated = True
            self.object.save()
        else:
            self.object.is_moderated = False
            self.object.save()
            for u in RealGroup.objects.filter(id=settings.SITH_GROUP_COM_ADMIN_ID).first().users.all():
                if not u.notifications.filter(type="NEWS_MODERATION", viewed=False).exists():
                    Notification(user=u, url=reverse("com:news_detail", kwargs={'news_id': self.object.id}), type="NEWS_MODERATION").save()
        return super(NewsEditView, self).form_valid(form)


class NewsCreateView(CanCreateMixin, CreateView):
    model = News
    form_class = NewsForm
    template_name = 'com/news_edit.jinja'

    def get_initial(self):
        init = {'author': self.request.user}
        try:
            init['club'] = Club.objects.filter(id=self.request.GET['club']).first()
        except:
            pass
        return init

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        if form.is_valid() and 'preview' not in request.POST.keys():
            return self.form_valid(form)
        else:
            self.object = form.instance
            return self.form_invalid(form)

    def form_valid(self, form):
        self.object = form.save()
        if form.cleaned_data['automoderation'] and self.request.user.is_in_group(settings.SITH_GROUP_COM_ADMIN_ID):
            self.object.moderator = self.request.user
            self.object.is_moderated = True
            self.object.save()
        else:
            for u in RealGroup.objects.filter(id=settings.SITH_GROUP_COM_ADMIN_ID).first().users.all():
                if not u.notifications.filter(type="NEWS_MODERATION", viewed=False).exists():
                    Notification(user=u, url=reverse("com:news_admin_list"), type="NEWS_MODERATION").save()
        return super(NewsCreateView, self).form_valid(form)


class NewsDeleteView(CanEditMixin, DeleteView):
    model = News
    pk_url_kwarg = 'news_id'
    template_name = 'core/delete_confirm.jinja'
    success_url = reverse_lazy('com:news_admin_list')


class NewsModerateView(CanEditMixin, SingleObjectMixin):
    model = News
    pk_url_kwarg = 'news_id'

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if 'remove' in request.GET.keys():
            self.object.is_moderated = False
        else:
            self.object.is_moderated = True
        self.object.moderator = request.user
        self.object.save()
        if 'next' in self.request.GET.keys():
            return redirect(self.request.GET['next'])
        return redirect('com:news_admin_list')


class NewsAdminListView(CanEditMixin, ListView):
    model = News
    template_name = 'com/news_admin_list.jinja'
    queryset = News.objects.all()


class NewsListView(CanViewMixin, ListView):
    model = News
    template_name = 'com/news_list.jinja'
    queryset = News.objects.filter(is_moderated=True)

    def get_context_data(self, **kwargs):
        kwargs = super(NewsListView, self).get_context_data(**kwargs)
        kwargs['NewsDate'] = NewsDate
        kwargs['timedelta'] = timedelta
        kwargs['birthdays'] = User.objects\
                .filter(date_of_birth__month=timezone.now().month, date_of_birth__day=timezone.now().day)\
                .filter(role__in=['STUDENT', 'FORMER_STUDENT'])\
                .order_by('-date_of_birth')
        return kwargs


class NewsDetailView(CanViewMixin, DetailView):
    model = News
    template_name = 'com/news_detail.jinja'
    pk_url_kwarg = 'news_id'

# Weekmail


class WeekmailPreviewView(ComTabsMixin, CanEditPropMixin, DetailView):
    model = Weekmail
    template_name = 'com/weekmail_preview.jinja'
    success_url = reverse_lazy('com:weekmail')
    current_tab = "weekmail"

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        try:
            if request.POST['send'] == "validate":
                self.object.send()
                return HttpResponseRedirect(reverse('com:weekmail') + "?qn_weekmail_send_success")
        except:
            pass
        return super(WeekmailEditView, self).get(request, *args, **kwargs)

    def get_object(self, queryset=None):
        return self.model.objects.filter(sent=False).order_by('-id').first()

    def get_context_data(self, **kwargs):
        """Add rendered weekmail"""
        kwargs = super(WeekmailPreviewView, self).get_context_data(**kwargs)
        kwargs['weekmail_rendered'] = self.object.render_html()
        return kwargs


class WeekmailEditView(ComTabsMixin, QuickNotifMixin, CanEditPropMixin, UpdateView):
    model = Weekmail
    template_name = 'com/weekmail.jinja'
    form_class = modelform_factory(Weekmail, fields=['title', 'intro', 'joke', 'protip', 'conclusion'],
                                   help_texts={'title': _("Delete and save to regenerate")})
    success_url = reverse_lazy('com:weekmail')
    current_tab = "weekmail"

    def get_object(self, queryset=None):
        weekmail = self.model.objects.filter(sent=False).order_by('-id').first()
        if not weekmail.title:
            now = timezone.now()
            weekmail.title = _("Weekmail of the ") + (now + timedelta(days=6 - now.weekday())).strftime('%d/%m/%Y')
            weekmail.save()
        return weekmail

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if 'up_article' in request.GET.keys():
            art = get_object_or_404(WeekmailArticle, id=request.GET['up_article'], weekmail=self.object)
            prev_art = self.object.articles.order_by('rank').filter(rank__lt=art.rank).last()
            if prev_art:
                art.rank, prev_art.rank = prev_art.rank, art.rank
                art.save()
                prev_art.save()
                self.quick_notif_list += ['qn_success']
        if 'down_article' in request.GET.keys():
            art = get_object_or_404(WeekmailArticle, id=request.GET['down_article'], weekmail=self.object)
            next_art = self.object.articles.order_by('rank').filter(rank__gt=art.rank).first()
            if next_art:
                art.rank, next_art.rank = next_art.rank, art.rank
                art.save()
                next_art.save()
                self.quick_notif_list += ['qn_success']
        if 'add_article' in request.GET.keys():
            art = get_object_or_404(WeekmailArticle, id=request.GET['add_article'], weekmail=None)
            art.weekmail = self.object
            art.rank = self.object.articles.aggregate(Max('rank'))['rank__max'] or 0
            art.rank += 1
            art.save()
            self.quick_notif_list += ['qn_success']
        if 'del_article' in request.GET.keys():
            art = get_object_or_404(WeekmailArticle, id=request.GET['del_article'], weekmail=self.object)
            art.weekmail = None
            art.rank = -1
            art.save()
            self.quick_notif_list += ['qn_success']
        return super(WeekmailEditView, self).get(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        """Add orphan articles """
        kwargs = super(WeekmailEditView, self).get_context_data(**kwargs)
        kwargs['orphans'] = WeekmailArticle.objects.filter(weekmail=None)
        return kwargs


class WeekmailArticleEditView(ComTabsMixin, QuickNotifMixin, CanEditPropMixin, UpdateView):
    """Edit an article"""
    model = WeekmailArticle
    fields = ['title', 'club', 'content']
    pk_url_kwarg = "article_id"
    template_name = 'core/edit.jinja'
    success_url = reverse_lazy('com:weekmail')
    quick_notif_url_arg = "qn_weekmail_article_edit"
    current_tab = "weekmail"


class WeekmailArticleCreateView(QuickNotifMixin, CreateView):
    """Post an article"""
    model = WeekmailArticle
    fields = ['title', 'club', 'content']
    template_name = 'core/create.jinja'
    success_url = reverse_lazy('core:user_tools')
    quick_notif_url_arg = "qn_weekmail_new_article"

    def get_initial(self):
        init = {}
        try:
            init['club'] = Club.objects.filter(id=self.request.GET['club']).first()
        except:
            pass
        return init

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        self.object = form.instance
        form.is_valid()  #  Valid a first time to populate club field
        try:
            m = form.instance.club.get_membership_for(request.user)
            if m.role <= settings.SITH_MAXIMUM_FREE_ROLE:
                raise
        except:
            form.add_error('club', ValidationError(_("You must be a board member of the selected club to post in the Weekmail.")))
        if form.is_valid() and not 'preview' in request.POST.keys():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

    def form_valid(self, form):
        form.instance.author = self.request.user
        return super(WeekmailArticleCreateView, self).form_valid(form)


class WeekmailArticleDeleteView(CanEditPropMixin, DeleteView):
    """Delete an article"""
    model = WeekmailArticle
    template_name = 'core/delete_confirm.jinja'
    success_url = reverse_lazy('com:weekmail')
    pk_url_kwarg = "article_id"


class MailingListAdminView(ComTabsMixin, ListView):
    template_name = "com/mailing_admin.jinja"
    model = Mailing
    current_tab = "mailings"

    def dispatch(self, request, *args, **kwargs):
        if not (request.user.is_in_group(settings.SITH_GROUP_COM_ADMIN_ID) or request.user.is_root):
            raise PermissionDenied
        return super(MailingListAdminView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        kwargs = super(MailingListAdminView, self).get_context_data(**kwargs)
        kwargs['moderated'] = self.get_queryset().filter(is_moderated=True).all()
        kwargs['unmoderated'] = self.get_queryset().filter(is_moderated=False).all()
        kwargs['has_moderated'] = len(kwargs['moderated']) > 0
        kwargs['has_unmoderated'] = len(kwargs['unmoderated']) > 0
        return kwargs


class MailingModerateView(View):

    def get(self, request, *args, **kwargs):
        mailing = get_object_or_404(Mailing, pk=kwargs['mailing_id'])
        if mailing.can_moderate(request.user):
            mailing.is_moderated = True
            mailing.moderator = request.user
            mailing.save()
            return redirect('com:mailing_admin')

        raise PermissionDenied


class PosterListBaseView(ListView):
    """List communication posters"""
    current_tab = "posters"
    model = Poster
    template_name = 'com/poster_list.jinja'

    def dispatch(self, request, *args, **kwargs):
        club_id = kwargs.pop('club_id', None)
        self.club = None
        if club_id:
            self.club = get_object_or_404(Club, pk=club_id)
        return super(PosterListBaseView, self).dispatch(request, *args, **kwargs)

    def get_queryset(self):
        if self.request.user.is_com_admin:
            return Poster.objects.all().order_by('-date_begin')
        else:
            return Poster.objects.filter(club=self.club.id)

    def get_context_data(self, **kwargs):
        kwargs = super(PosterListBaseView, self).get_context_data(**kwargs)
        if not self.request.user.is_com_admin:
            kwargs['club'] = self.club
        return kwargs


class PosterCreateBaseView(CreateView):
    """Create communication poster"""
    current_tab = "posters"
    form_class = PosterForm
    template_name = 'core/create.jinja'

    def get_queryset(self):
        return Poster.objects.all()

    def dispatch(self, request, *args, **kwargs):
        if 'club_id' in kwargs:
            self.club = get_object_or_404(Club, pk=kwargs['club_id'])
        return super(PosterCreateBaseView, self).dispatch(request, *args, **kwargs)

    def get_form_kwargs(self):
        kwargs = super(PosterCreateBaseView, self).get_form_kwargs()
        kwargs.update({'user': self.request.user})
        return kwargs

    def get_context_data(self, **kwargs):
        kwargs = super(PosterCreateBaseView, self).get_context_data(**kwargs)
        if not self.request.user.is_com_admin:
            kwargs['club'] = self.club
        return kwargs

    def form_valid(self, form):
        if self.request.user.is_com_admin:
            form.instance.is_moderated = True
        return super(PosterCreateBaseView, self).form_valid(form)


class PosterEditBaseView(UpdateView):
    """Edit communication poster"""
    pk_url_kwarg = "poster_id"
    current_tab = "posters"
    form_class = PosterForm
    template_name = 'com/poster_edit.jinja'

    def dispatch(self, request, *args, **kwargs):
        if 'club_id' in kwargs and kwargs['club_id']:
            try:
                self.club = Club.objects.get(pk=kwargs['club_id'])
            except Club.DoesNotExist:
                raise PermissionDenied
        return super(PosterEditBaseView, self).dispatch(request, *args, **kwargs)

    def get_queryset(self):
        return Poster.objects.all()

    def get_form_kwargs(self):
        kwargs = super(PosterEditBaseView, self).get_form_kwargs()
        kwargs.update({'user': self.request.user})
        return kwargs

    def get_context_data(self, **kwargs):
        kwargs = super(PosterEditBaseView, self).get_context_data(**kwargs)
        if not self.request.user.is_com_admin:
            kwargs['club'] = self.club
        return kwargs

    def form_valid(self, form):
        if self.request.user.is_com_admin:
            form.instance.is_moderated = False
        return super(PosterEditBaseView, self).form_valid(form)


class PosterDeleteBaseView(DeleteView):
    """Edit communication poster"""
    pk_url_kwarg = "poster_id"
    current_tab = "posters"
    model = Poster
    template_name = 'core/delete_confirm.jinja'

    def dispatch(self, request, *args, **kwargs):
        if 'club_id' in kwargs and kwargs['club_id']:
            try:
                self.club = Club.objects.get(pk=kwargs['club_id'])
            except Club.DoesNotExist:
                raise PermissionDenied
        return super(PosterDeleteBaseView, self).dispatch(request, *args, **kwargs)


class PosterListView(IsComAdminMixin, ComTabsMixin, PosterListBaseView):
    """List communication posters"""

    def get_context_data(self, **kwargs):
        kwargs = super(PosterListView, self).get_context_data(**kwargs)
        kwargs['app'] = "com"
        return kwargs


class PosterCreateView(IsComAdminMixin, ComTabsMixin, PosterCreateBaseView):
    """Create communication poster"""
    success_url = reverse_lazy('com:poster_list')

    def get_context_data(self, **kwargs):
        kwargs = super(PosterCreateView, self).get_context_data(**kwargs)
        kwargs['app'] = "com"
        return kwargs


class PosterEditView(IsComAdminMixin, ComTabsMixin, PosterEditBaseView):
    """Edit communication poster"""
    success_url = reverse_lazy('com:poster_list')

    def get_context_data(self, **kwargs):
        kwargs = super(PosterEditView, self).get_context_data(**kwargs)
        kwargs['app'] = "com"
        return kwargs


class PosterDeleteView(IsComAdminMixin, ComTabsMixin, PosterDeleteBaseView):
    """Delete communication poster"""
    success_url = reverse_lazy('com:poster_list')


class PosterModerateListView(IsComAdminMixin, ComTabsMixin, ListView):
    """Moderate list communication poster"""
    current_tab = "posters"
    model = Poster
    template_name = 'com/poster_moderate.jinja'
    queryset = Poster.objects.filter(is_moderated=False).all()

    def get_context_data(self, **kwargs):
        kwargs = super(PosterModerateListView, self).get_context_data(**kwargs)
        kwargs['app'] = "com"
        return kwargs


class PosterModerateView(IsComAdminMixin, ComTabsMixin, View):
    """Moderate communication poster"""
    def get(self, request, *args, **kwargs):
        obj = get_object_or_404(Poster, pk=kwargs['object_id'])
        if obj.can_be_moderated_by(request.user):
            obj.is_moderated = True
            obj.moderator = request.user
            obj.save()
            return redirect('com:poster_moderate_list')
        raise PermissionDenied

    def get_context_data(self, **kwargs):
        kwargs = super(PosterModerateListView, self).get_context_data(**kwargs)
        kwargs['app'] = "com"
        return kwargs


class ScreenListView(IsComAdminMixin, ComTabsMixin, ListView):
    """List communication screens"""
    current_tab = "screens"
    model = Screen
    template_name = 'com/screen_list.jinja'


class ScreenSlideshowView(DetailView):
    """Slideshow of actives posters"""
    pk_url_kwarg = "screen_id"
    model = Screen
    template_name = 'com/screen_slideshow.jinja'

    def get_context_data(self, **kwargs):
        kwargs = super(ScreenSlideshowView, self).get_context_data(**kwargs)
        kwargs['posters'] = self.object.active_posters()
        return kwargs


class ScreenCreateView(IsComAdminMixin, ComTabsMixin, CreateView):
    """Create communication screen"""
    current_tab = "screens"
    model = Screen
    fields = ['name', ]
    template_name = 'core/create.jinja'
    success_url = reverse_lazy('com:screen_list')


class ScreenEditView(IsComAdminMixin, ComTabsMixin, UpdateView):
    """Edit communication screen"""
    pk_url_kwarg = "screen_id"
    current_tab = "screens"
    model = Screen
    fields = ['name', ]
    template_name = 'com/screen_edit.jinja'
    success_url = reverse_lazy('com:screen_list')


class ScreenDeleteView(IsComAdminMixin, ComTabsMixin, DeleteView):
    """Delete communication screen"""
    pk_url_kwarg = "screen_id"
    current_tab = "screens"
    model = Screen
    template_name = 'core/delete_confirm.jinja'
    success_url = reverse_lazy('com:screen_list')