# -*- coding: utf-8 -*- from django.core.urlresolvers import reverse from django.http import HttpResponse from django.utils.translation import ugettext as _ from openslides.config.api import config from openslides.projector.api import get_active_slide from openslides.utils.template import Tab from openslides.utils.tornado_webserver import ProjectorSocketHandler from openslides.utils.views import (AjaxView, CreateView, DeleteView, RedirectView, ListView, UpdateView) from .forms import MediafileNormalUserCreateForm, MediafileUpdateForm from .models import Mediafile class MediafileListView(ListView): """ View to see a table of all uploaded files. """ model = Mediafile def has_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')) class MediafileCreateView(CreateView): """ View to upload a new file. A manager can also set the uploader, else the request user is set as uploader. """ model = Mediafile permission_required = 'mediafile.can_upload' success_url_name = 'mediafile_list' url_name_args = [] def get_form(self, form_class): form_kwargs = self.get_form_kwargs() if self.request.method == 'GET': form_kwargs['initial'].update({'uploader': self.request.user.person_id}) if not self.request.user.has_perm('mediafile.can_manage'): # Returns our own ModelForm from .forms return MediafileNormalUserCreateForm(**form_kwargs) else: # Returns a ModelForm created by Django. return form_class(**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(MediafileCreateView, self).manipulate_object(*args, **kwargs) class MediafileUpdateView(UpdateView): """ View to edit the entry of an uploaded file. """ model = Mediafile permission_required = 'mediafile.can_manage' form_class = MediafileUpdateForm success_url_name = 'mediafile_list' url_name_args = [] def get_form_kwargs(self, *args, **kwargs): form_kwargs = super(MediafileUpdateView, self).get_form_kwargs(*args, **kwargs) form_kwargs['initial'].update({'uploader': self.object.uploader.person_id}) return form_kwargs class MediafileDeleteView(DeleteView): """ View to delete the entry of an uploaded file and the file itself. """ model = Mediafile permission_required = 'mediafile.can_manage' success_url_name = 'mediafile_list' def on_clicked_yes(self, *args, **kwargs): """Deletes the file in the filesystem, if user clicks "Yes".""" self.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 ProjectorSocketHandler.send_updates( {'calls': {'load_pdf_page': active_slide['page_num']}}) 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 = 'dashboard' def get_ajax_context(self, *args, **kwargs): config['pdf_fullscreen'] = not config['pdf_fullscreen'] active_slide = get_active_slide() if active_slide['callback'] == 'mediafile': ProjectorSocketHandler.send_updates( {'calls': {'toggle_fullscreen': config['pdf_fullscreen']}}) return {'fullscreen': config['pdf_fullscreen']} def register_tab(request): """ Inserts a new Tab to the views for files. """ selected = request.path.startswith('/mediafile/') return Tab( title=_('Files'), app='mediafile', # TODO: Rename this to icon='mediafile' later stylefile='styles/mediafile.css', url=reverse('mediafile_list'), permission=(request.user.has_perm('mediafile.can_see') or request.user.has_perm('mediafile.can_upload') or request.user.has_perm('mediafile.can_manage')), selected=selected)