views.py
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from django.shortcuts import get_object_or_404, redirect, render
from django.http import HttpResponse, Http404
from os import path
from django.views import generic
from django.contrib import messages
from django.core.urlresolvers import reverse, reverse_lazy
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.mixins import LoginRequiredMixin
from amadeus.permissions import has_subject_permissions, has_resource_permissions
from log.mixins import LogMixin
from topics.models import Topic
from pendencies.forms import PendenciesForm
from .forms import FileLinkForm
from .models import FileLink
class DownloadFile(LoginRequiredMixin, LogMixin, generic.DetailView):
log_component = 'resources'
log_action = 'view'
log_resource = 'filelink'
log_context = {}
login_url = reverse_lazy("users:login")
redirect_field_name = 'next'
model = FileLink
def dispatch(self, request, *args, **kwargs):
slug = self.kwargs.get('slug', '')
file_link = get_object_or_404(FileLink, slug = slug)
if not has_resource_permissions(request.user, file_link):
return redirect(reverse_lazy('subjects:home'))
return super(DownloadFile, self).dispatch(request, *args, **kwargs)
def render_to_response(self, context, **response_kwargs):
slug = self.kwargs.get('slug', '')
file_link = get_object_or_404(FileLink, slug = slug)
if not path.exists(file_link.file_content.path):
raise Http404()
response = HttpResponse(open(file_link.file_content.path, 'rb').read())
response['Content-Type'] = 'application/force-download'
response['Pragma'] = 'public'
response['Expires'] = '0'
response['Cache-Control'] = 'must-revalidate, post-check=0, pre-check=0'
response['Content-Disposition'] = 'attachment; filename=%s' % file_link.filename
response['Content-Transfer-Encoding'] = 'binary'
response['Content-Length'] = str(path.getsize(file_link.file_content.path))
self.log_context['category_id'] = file_link.topic.subject.category.id
self.log_context['category_name'] = file_link.topic.subject.category.name
self.log_context['category_slug'] = file_link.topic.subject.category.slug
self.log_context['subject_id'] = file_link.topic.subject.id
self.log_context['subject_name'] = file_link.topic.subject.name
self.log_context['subject_slug'] = file_link.topic.subject.slug
self.log_context['topic_id'] = file_link.topic.id
self.log_context['topic_name'] = file_link.topic.name
self.log_context['topic_slug'] = file_link.topic.slug
self.log_context['filelink_id'] = file_link.id
self.log_context['filelink_name'] = file_link.name
self.log_context['filelink_slug'] = file_link.slug
super(DownloadFile, self).createLog(self.request.user, self.log_component, self.log_action, self.log_resource, self.log_context)
return response
class CreateView(LoginRequiredMixin, LogMixin, generic.edit.CreateView):
log_component = 'resources'
log_action = 'create'
log_resource = 'filelink'
log_context = {}
login_url = reverse_lazy("users:login")
redirect_field_name = 'next'
template_name = 'file_links/create.html'
form_class = FileLinkForm
def dispatch(self, request, *args, **kwargs):
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
if not has_subject_permissions(request.user, topic.subject):
return redirect(reverse_lazy('subjects:home'))
return super(CreateView, self).dispatch(request, *args, **kwargs)
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
pendencies_form = PendenciesForm(initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
return self.render_to_response(self.get_context_data(form = form, pendencies_form = pendencies_form))
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
pendencies_form = PendenciesForm(self.request.POST, initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
if (form.is_valid() and pendencies_form.is_valid()):
return self.form_valid(form, pendencies_form)
else:
return self.form_invalid(form, pendencies_form)
def get_initial(self):
initial = super(CreateView, self).get_initial()
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
initial['subject'] = topic.subject
return initial
def form_invalid(self, form, pendencies_form):
return self.render_to_response(self.get_context_data(form = form, pendencies_form = pendencies_form))
def form_valid(self, form, pendencies_form):
self.object = form.save(commit = False)
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
self.object.topic = topic
self.object.order = topic.resource_topic.count() + 1
if not self.object.topic.visible and not self.object.topic.repository:
self.object.visible = False
self.object.save()
pend_form = pendencies_form.save(commit = False)
pend_form.resource = self.object
if not pend_form.action == "":
pend_form.save()
self.log_context['category_id'] = self.object.topic.subject.category.id
self.log_context['category_name'] = self.object.topic.subject.category.name
self.log_context['category_slug'] = self.object.topic.subject.category.slug
self.log_context['subject_id'] = self.object.topic.subject.id
self.log_context['subject_name'] = self.object.topic.subject.name
self.log_context['subject_slug'] = self.object.topic.subject.slug
self.log_context['topic_id'] = self.object.topic.id
self.log_context['topic_name'] = self.object.topic.name
self.log_context['topic_slug'] = self.object.topic.slug
self.log_context['filelink_id'] = self.object.id
self.log_context['filelink_name'] = self.object.name
self.log_context['filelink_slug'] = self.object.slug
super(CreateView, self).createLog(self.request.user, self.log_component, self.log_action, self.log_resource, self.log_context)
return redirect(self.get_success_url())
def get_context_data(self, **kwargs):
context = super(CreateView, self).get_context_data(**kwargs)
context['title'] = _('Create File Link')
slug = self.kwargs.get('slug', '')
topic = get_object_or_404(Topic, slug = slug)
context['topic'] = topic
context['subject'] = topic.subject
return context
def get_success_url(self):
messages.success(self.request, _('The File Link "%s" was added to the Topic "%s" of the virtual environment "%s" successfully!')%(self.object.name, self.object.topic.name, self.object.topic.subject.name))
return reverse_lazy('subjects:view', kwargs = {'slug': self.object.topic.subject.slug})
class UpdateView(LoginRequiredMixin, LogMixin, generic.UpdateView):
log_component = 'resources'
log_action = 'update'
log_resource = 'filelink'
log_context = {}
login_url = reverse_lazy("users:login")
redirect_field_name = 'next'
template_name = 'file_links/update.html'
model = FileLink
form_class = FileLinkForm
context_object_name = 'file_link'
def dispatch(self, request, *args, **kwargs):
slug = self.kwargs.get('topic_slug', '')
topic = get_object_or_404(Topic, slug = slug)
if not has_subject_permissions(request.user, topic.subject):
return redirect(reverse_lazy('subjects:home'))
return super(UpdateView, self).dispatch(request, *args, **kwargs)
def get(self, request, *args, **kwargs):
self.object = self.get_object()
form_class = self.get_form_class()
form = self.get_form(form_class)
slug = self.kwargs.get('topic_slug', '')
topic = get_object_or_404(Topic, slug = slug)
pend_form = self.object.pendencies_resource.all()
if len(pend_form) > 0:
pendencies_form = PendenciesForm(instance = pend_form[0], initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
else:
pendencies_form = PendenciesForm(initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
return self.render_to_response(self.get_context_data(form = form, pendencies_form = pendencies_form))
def post(self, request, *args, **kwargs):
self.object = self.get_object()
form_class = self.get_form_class()
form = self.get_form(form_class)
slug = self.kwargs.get('topic_slug', '')
topic = get_object_or_404(Topic, slug = slug)
pend_form = self.object.pendencies_resource.all()
if len(pend_form) > 0:
pendencies_form = PendenciesForm(self.request.POST, instance = pend_form[0], initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
else:
pendencies_form = PendenciesForm(self.request.POST, initial = {'subject': topic.subject.id, 'actions': [("", "-------"),("view", _("Visualize"))]})
if (form.is_valid() and pendencies_form.is_valid()):
return self.form_valid(form, pendencies_form)
else:
return self.form_invalid(form, pendencies_form)
def form_invalid(self, form, pendencies_form):
return self.render_to_response(self.get_context_data(form = form, pendencies_form = pendencies_form))
def form_valid(self, form, pendencies_form):
self.object = form.save(commit = False)
if not self.object.topic.visible and not self.object.topic.repository:
self.object.visible = False
self.object.save()
pend_form = pendencies_form.save(commit = False)
pend_form.resource = self.object
if not pend_form.action == "":
pend_form.save()
self.log_context['category_id'] = self.object.topic.subject.category.id
self.log_context['category_name'] = self.object.topic.subject.category.name
self.log_context['category_slug'] = self.object.topic.subject.category.slug
self.log_context['subject_id'] = self.object.topic.subject.id
self.log_context['subject_name'] = self.object.topic.subject.name
self.log_context['subject_slug'] = self.object.topic.subject.slug
self.log_context['topic_id'] = self.object.topic.id
self.log_context['topic_name'] = self.object.topic.name
self.log_context['topic_slug'] = self.object.topic.slug
self.log_context['filelink_id'] = self.object.id
self.log_context['filelink_name'] = self.object.name
self.log_context['filelink_slug'] = self.object.slug
super(UpdateView, self).createLog(self.request.user, self.log_component, self.log_action, self.log_resource, self.log_context)
return redirect(self.get_success_url())
def get_context_data(self, **kwargs):
context = super(UpdateView, self).get_context_data(**kwargs)
context['title'] = _('Update File Link')
slug = self.kwargs.get('topic_slug', '')
topic = get_object_or_404(Topic, slug = slug)
context['topic'] = topic
context['subject'] = topic.subject
return context
def get_success_url(self):
messages.success(self.request, _('The File Link "%s" was updated successfully!')%(self.object.name))
return reverse_lazy('subjects:view', kwargs = {'slug': self.object.topic.subject.slug})
class DeleteView(LoginRequiredMixin, LogMixin, generic.DeleteView):
log_component = 'resources'
log_action = 'delete'
log_resource = 'filelink'
log_context = {}
login_url = reverse_lazy("users:login")
redirect_field_name = 'next'
template_name = 'resources/delete.html'
model = FileLink
context_object_name = 'resource'
def dispatch(self, request, *args, **kwargs):
slug = self.kwargs.get('slug', '')
file_link = get_object_or_404(FileLink, slug = slug)
if not has_subject_permissions(request.user, file_link.topic.subject):
return redirect(reverse_lazy('subjects:home'))
return super(DeleteView, self).dispatch(request, *args, **kwargs)
def get_success_url(self):
messages.success(self.request, _('The File Link "%s" was removed successfully from virtual environment "%s"!')%(self.object.name, self.object.topic.subject.name))
self.log_context['category_id'] = self.object.topic.subject.category.id
self.log_context['category_name'] = self.object.topic.subject.category.name
self.log_context['category_slug'] = self.object.topic.subject.category.slug
self.log_context['subject_id'] = self.object.topic.subject.id
self.log_context['subject_name'] = self.object.topic.subject.name
self.log_context['subject_slug'] = self.object.topic.subject.slug
self.log_context['topic_id'] = self.object.topic.id
self.log_context['topic_name'] = self.object.topic.name
self.log_context['topic_slug'] = self.object.topic.slug
self.log_context['filelink_id'] = self.object.id
self.log_context['filelink_name'] = self.object.name
self.log_context['filelink_slug'] = self.object.slug
super(DeleteView, self).createLog(self.request.user, self.log_component, self.log_action, self.log_resource, self.log_context)
return reverse_lazy('subjects:view', kwargs = {'slug': self.object.topic.subject.slug})