from django.views.generic.detail import SingleObjectMixin from django.shortcuts import redirect from django.urls import reverse from . import models from django.contrib import messages import sys, mimetypes from django.http import Http404, HttpResponse class EnsureCFSOpenMixin(SingleObjectMixin): def dispatch(self, request, *args, **kwargs): # do not permit editing if call for speakers is not open if not self.camp.call_for_speakers_open: messages.error(request, "The Call for Speakers is not open.") return redirect(reverse('proposal_list', kwargs={'camp_slug': self.camp.slug})) # alright, continue with the request return super().dispatch(request, *args, **kwargs) class CreateProposalMixin(SingleObjectMixin): def form_valid(self, form): # set camp and user before saving form.instance.camp = self.camp form.instance.user = self.request.user speaker = form.save() return redirect(reverse('proposal_list', kwargs={'camp_slug': self.camp.slug})) class EnsureUnapprovedProposalMixin(SingleObjectMixin): def dispatch(self, request, *args, **kwargs): # do not permit editing if the proposal is already approved if self.get_object().proposal_status == models.UserSubmittedModel.PROPOSAL_APPROVED: messages.error(request, "This proposal has already been approved. Please contact the organisers if you need to modify something.") return redirect(reverse('proposal_list', kwargs={'camp_slug': self.camp.slug})) # alright, continue with the request return super().dispatch(request, *args, **kwargs) class EnsureWritableCampMixin(SingleObjectMixin): def dispatch(self, request, *args, **kwargs): # do not permit view if camp is in readonly mode if self.camp.read_only: messages.error(request, "No thanks") return redirect(reverse('proposal_list', kwargs={'camp_slug': self.camp.slug})) # alright, continue with the request return super().dispatch(request, *args, **kwargs) class EnsureUserOwnsProposalMixin(SingleObjectMixin): def dispatch(self, request, *args, **kwargs): # make sure that this proposal belongs to the logged in user if self.get_object().user.username != request.user.username: messages.error(request, "No thanks") return redirect(reverse('proposal_list', kwargs={'camp_slug': self.camp.slug})) # alright, continue with the request return super().dispatch(request, *args, **kwargs) class PictureViewMixin(SingleObjectMixin): def dispatch(self, request, *args, **kwargs): # do we have the requested picture? if kwargs['picture'] == 'thumbnail': if self.get_object().picture_small: self.picture = self.get_object().picture_small else: raise Http404() elif kwargs['picture'] == 'large': if self.get_object().picture_large: self.picture = self.get_object().picture_large else: raise Http404() else: # only 'thumbnail' and 'large' pictures supported raise Http404() # alright, continue with the request return super().dispatch(request, *args, **kwargs) def get_picture_response(self): if 'runserver' in sys.argv or 'runserver_plus' in sys.argv: # this is a local devserver situation, guess mimetype from extension and return picture directly response = HttpResponse(self.picture, content_type=mimetypes.types_map[".%s" % self.picture.name.split(".")[-1]]) else: # make nginx serve the picture using X-Accel-Redirect # (this works for nginx only, other webservers use x-sendfile) # maybe make the header name configurable response = HttpResponse() response['X-Accel-Redirect'] = '/public/speakerproposals/%(campslug)s/%(proposaluuid)s/%(filename)s' % { 'campslug': self.camp.slug, 'proposaluuid': self.get_object().uuid, 'filename': os.path.basename(self.picture.name), } response['Content-Type'] = '' return response