from django.http import HttpResponse from openslides.config.api import config from openslides.projector.api import get_active_slide from openslides.utils.rest_api import viewsets from openslides.utils.views import (AjaxView, CreateView, DeleteView, RedirectView, ListView, UpdateView) from .forms import MediafileManagerForm, MediafileNormalUserForm from .models import Mediafile from .serializers import MediafileSerializer class MediafileListView(ListView): """ View to see a table of all uploaded files. """ model = Mediafile def check_permission(self, request, *args, **kwargs): return (request.user.has_perm('mediafile.can_see') or request.user.has_perm('mediafile.can_upload') or request.user.has_perm('mediafile.can_manage')) def get_context_data(self, *args, **kwargs): context = super(MediafileListView, self).get_context_data(*args, **kwargs) for mediafile in context['mediafile_list']: if self.request.user.has_perm('mediafile.can_manage'): mediafile.with_action_buttons = True elif self.request.user.has_perm('mediafile.can_upload') and self.request.user == mediafile.uploader: mediafile.with_action_buttons = True else: mediafile.with_action_buttons = False return context class MediafileViewMixin(object): """ Mixin for create and update views for mediafiles. A manager can set the uploader manually, else the request user is set as uploader. """ fields = ('mediafile', 'title', 'uploader', 'is_presentable',) model = Mediafile success_url_name = 'mediafile_list' url_name_args = [] def get_form(self, form_class): form_kwargs = self.get_form_kwargs() if not self.request.user.has_perm('mediafile.can_manage'): return MediafileNormalUserForm(**form_kwargs) else: return MediafileManagerForm(**form_kwargs) def manipulate_object(self, *args, **kwargs): """ Method to handle the uploader. If a user has manager permissions, he has to set the uploader in the given form field. Then this method only calls super. Else it sets the requesting user as uploader. """ if not self.request.user.has_perm('mediafile.can_manage'): self.object.uploader = self.request.user return super(MediafileViewMixin, self).manipulate_object(*args, **kwargs) class MediafileCreateView(MediafileViewMixin, CreateView): """ View to upload a new file. """ required_permission = 'mediafile.can_upload' def get_form_kwargs(self, *args, **kwargs): form_kwargs = super(MediafileCreateView, self).get_form_kwargs(*args, **kwargs) if self.request.method == 'GET': form_kwargs['initial'].update({'uploader': self.request.user}) return form_kwargs class MediafileUpdateView(MediafileViewMixin, UpdateView): """ View to edit the entry of an uploaded file. """ def check_permission(self, request, *args, **kwargs): return (request.user.has_perm('mediafile.can_manage') or (request.user.has_perm('mediafile.can_upload') and self.get_object().uploader == self.request.user)) def get_form_kwargs(self, *args, **kwargs): form_kwargs = super(MediafileUpdateView, self).get_form_kwargs(*args, **kwargs) form_kwargs['initial'].update({'uploader': self.get_object().uploader.pk}) return form_kwargs class MediafileDeleteView(DeleteView): """ View to delete the entry of an uploaded file and the file itself. """ model = Mediafile success_url_name = 'mediafile_list' def check_permission(self, request, *args, **kwargs): return (request.user.has_perm('mediafile.can_manage') or (request.user.has_perm('mediafile.can_upload') and self.get_object().uploader == self.request.user)) def on_clicked_yes(self, *args, **kwargs): """Deletes the file in the filesystem, if user clicks "Yes".""" self.get_object().mediafile.delete() return super(MediafileDeleteView, self).on_clicked_yes(*args, **kwargs) class PdfNavBaseView(AjaxView): """ BaseView for the Pdf Ajax Navigation. """ def get_ajax_context(self, *args, **kwargs): return {'current_page': self.active_slide['page_num']} def load_other_page(self, active_slide): """ Tell connected clients to load an other pdf page. """ config['projector_active_slide'] = active_slide class PdfNextView(PdfNavBaseView): """ Activate the next Page of a pdf and return the number of the current page. """ def get(self, request, *args, **kwargs): """ Increment the page number by 1. If the page number is set in the active slide, we are the value is incremented by 1. Otherwise, it is the first page and it is set to 2. """ self.active_slide = get_active_slide() if self.active_slide['callback'] == 'mediafile': if 'page_num' not in self.active_slide: self.active_slide['page_num'] = 2 else: self.active_slide['page_num'] += 1 self.load_other_page(self.active_slide) response = super(PdfNextView, self).get(self, request, *args, **kwargs) else: # no Mediafile is active and the JavaScript should not do anything. response = HttpResponse() return response class PdfPreviousView(PdfNavBaseView): """ Activate the previous Page of a pdf and return the number of the current page. """ def get(self, request, *args, **kwargs): """ Decrement the page number by 1. If the page number is set and it is greater than 1, it is decremented by 1. Otherwise, it is the first page and nothing happens. """ self.active_slide = get_active_slide() response = None if self.active_slide['callback'] == 'mediafile': if 'page_num' in self.active_slide and self.active_slide['page_num'] > 1: self.active_slide['page_num'] -= 1 self.load_other_page(self.active_slide) response = super(PdfPreviousView, self).get(self, request, *args, **kwargs) if not response: response = HttpResponse() return response class PdfGoToPageView(PdfNavBaseView): """ Activate the page set in the textfield. """ def get(self, request, *args, **kwargs): target_page = int(request.GET.get('page_num')) self.active_slide = get_active_slide() if target_page: self.active_slide['page_num'] = target_page self.load_other_page(self.active_slide) response = super(PdfGoToPageView, self).get(self, request, *args, **kwargs) else: response = HttpResponse() return response class PdfToggleFullscreenView(RedirectView): """ Toggle fullscreen mode for pdf presentations. """ allow_ajax = True url_name = 'core_dashboard' def get_ajax_context(self, *args, **kwargs): config['pdf_fullscreen'] = not config['pdf_fullscreen'] return {'fullscreen': config['pdf_fullscreen']} class MediafileViewSet(viewsets.ModelViewSet): """ API endpoint to list, retrieve, create, update and destroy mediafile objects. """ model = Mediafile queryset = Mediafile.objects.all() serializer_class = MediafileSerializer def check_permissions(self, request): """ Calls self.permission_denied() if the requesting user has not the permission to see mediafile objects and in case of create, update or destroy requests the permission to manage mediafile objects. """ # TODO: Use mediafile.can_upload permission to create and update some # objects but restricted concerning the uploader. if (not request.user.has_perm('mediafile.can_see') or (self.action in ('create', 'update', 'destroy') and not request.user.has_perm('mediafile.can_manage'))): self.permission_denied(request)