lostplaces-backend/django_lostplaces/lostplaces/views/base_views.py

141 lines
4.5 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from django.views import View
from django.views.generic.edit import CreateView
from django.views.generic.detail import SingleObjectMixin
from django.views.generic import ListView
from django.contrib import messages
from django.contrib.auth.mixins import UserPassesTestMixin, LoginRequiredMixin
from django.contrib.messages.views import SuccessMessageMixin
from django.shortcuts import redirect, get_object_or_404
from django.urls import reverse_lazy, reverse
from django.utils.translation import gettext as _
from lostplaces.models import Place
from lostplaces.common import redirect_referer_or
class IsAuthenticatedMixin(LoginRequiredMixin, View):
'''
A view mixin that checks wether a user is logged in or not.
If the user is not logged in, he gets redirected to
the login page.
'''
login_url = reverse_lazy('login')
permission_denied_message = _('Please login to proceed')
def handle_no_permission(self):
if not self.request.user.is_authenticated:
messages.error(self.request, self.permission_denied_message)
return super().handle_no_permission()
class IsPlaceSubmitterMixin(UserPassesTestMixin, View):
'''
A view mixin that checks wether a user is the submitter
of a place, throws 403 if the user is not. The subclass
has to provide a get_place method, which returns the
place to check.
'''
place_submitter_error_message = None
def get_place(self):
pass
def test_func(self):
""" Check if user is eligible to modify place. """
if not hasattr(self.request, 'user'):
return False
if self.request.user.is_superuser:
return True
# Check if currently logged in user was the submitter
place_obj = self.get_place()
if place_obj and hasattr(place_obj, 'submitted_by') and self.request.user.explorer == place_obj.submitted_by:
return True
if self.place_submitter_error_message:
messages.error(self.request, self.place_submitter_error_message)
return False
class IsEligibleToSeePlaceMixin(UserPassesTestMixin):
not_eligible_to_see_message = None
def get_place(self):
pass
def test_func(self):
if not hasattr(self.request, 'user'):
return False
if self.request.user.explorer.is_eligible_to_see(self.get_place()):
return True
if self.not_eligible_to_see_message:
messages.error(self.request, self.not_eligible_to_see_message)
return False
class PlaceAssetCreateView(IsAuthenticatedMixin, SuccessMessageMixin, CreateView):
"""
Abstract View for creating a place asset (i.e. PlaceImage)
"""
model = None
template_name = ''
success_message = ''
def get(self, request, place_id, *args, **kwargs):
self.place = get_object_or_404(Place, pk=place_id)
return super().get(request, *args, **kwargs)
def post(self, request, place_id, *args, **kwargs):
self.place = get_object_or_404(Place, pk=place_id)
response = super().post(request, *args, **kwargs)
self.object.place = self.place
self.object.submitted_by = request.user.explorer
self.object.save()
return response
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['place'] = self.place
return context
def get_success_url(self):
return reverse_lazy('place_detail', kwargs={'pk': self.place.id})
class PlaceAssetDeleteView(IsAuthenticatedMixin, IsPlaceSubmitterMixin, SingleObjectMixin, View):
model = None
success_message = ''
permission_denied_message = ''
def get_place(self):
place_id = self.get_object().place.id
return Place.objects.get(pk=place_id)
def test_func(self):
can_edit_place = super().test_func()
if can_edit_place:
return True
if self.get_object().submitted_by == self.request.user.explorer:
return True
messages.error(self.request, self.permission_denied_message)
return False
def get(self, request, *args, **kwargs):
place_id = self.get_object().place.id
self.get_object().delete()
messages.success(self.request, self.success_message)
return redirect_referer_or(request, reverse('place_detail', kwargs={'pk': place_id}))
class LevelCapPlaceListView(ListView):
model = Place
def get_queryset(self):
return self.request.user.explorer.get_places_eligible_to_see()