views.py
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from django.shortcuts import render
from django.views import generic
from django.core.urlresolvers import reverse_lazy
from django.contrib import messages
from django.utils.translation import ugettext_lazy as _
from django.shortcuts import get_object_or_404,redirect
from django.contrib.auth.mixins import LoginRequiredMixin
from rolepermissions.mixins import HasRoleMixin
from core.mixins import NotificationMixin
from django.urls import reverse
from django.core.files.base import ContentFile
from .image_crawler import *
from courses.models import Topic
from .models import Link
from .forms import *
# Create your views here.
class CreateLink(LoginRequiredMixin, HasRoleMixin, NotificationMixin, generic.CreateView):
allowed_roles = ['professor', 'system_admin']
template_name = 'links/create_link.html'
form_class = CreateLinkForm
success_url = reverse_lazy('course:manage')
context_object_name = 'form'
def form_invalid(self,form):
context = super(CreateLink, self).form_invalid(form)
context.status_code = 400
return context
def form_valid(self, form):
self.object = form.save(commit = False)
topic = get_object_or_404(Topic, slug = self.kwargs.get('slug'))
self.object.topic = topic
self.object.save()
self.link = Link.objects.get(slug = self.object.slug)
self.formato,self.baixado = get_images(self.link.link_url,self.link.slug)
self.caminho = 'links/static/images/%s'%(self.link.slug)+'%s'%(self.formato)
super(CreateLink, self).createNotification(message="created a Link at "+ self.object.topic.name, actor=self.request.user,
resource_name=self.object.name, resource_link= reverse('course:view_topic', args=[self.object.topic.slug]),
users=self.object.topic.subject.students.all())
self.setImage()
return self.get_success_url()
def setImage(self):
if self.baixado:
with open(self.caminho,'rb') as f:
data = f.read()
nome = '%s'%(self.link.slug)+"%s"%(self.formato)
self.link.image.save(nome,ContentFile(data))
else:
with open('links/static/images/default.jpg','rb') as f:
data = f.read()
self.link.image.save('default.jpg',ContentFile(data))
def get_context_data(self,**kwargs):
context = {}
context['links'] = Link.objects.all()
context['form'] = CreateLinkForm
topic = get_object_or_404(Topic, slug = self.kwargs.get('slug'))
context["topic"] = topic
return context
def get_success_url(self):
self.success_url = redirect('course:links:render_link', id = self.object.id)
return self.success_url
def deleteLink(request,linkname):
link = get_object_or_404(Link,name = linkname)
link.delete()
template_name = 'links/delete_link.html'
messages.success(request,_("Link deleted Successfully!"))
return redirect('course:manage')
def render_link(request, id):
template_name = 'links/render_link.html'
context = {
'link': get_object_or_404(Link, id = id)
}
return render(request, template_name, context)
#Referencia no delete link para adicionar quando resolver o problema do context {% url 'course:delete' link.name %}
class UpdateLink(LoginRequiredMixin, HasRoleMixin, generic.UpdateView):
allowed_roles = ['professor', 'system_admin']
template_name = 'links/update_link.html'
form_class = UpdateLinkForm
success_url = reverse_lazy('course:links:render_link')
def form_valid(self, form):
form.save()
messages.success(self.request, _('Link updated successfully!'))
return super(UpdateLink, self).form_valid(form)
def get_object(self, queryset=None):
self.object = get_object_or_404(Link, slug = self.kwargs.get('slug'))
print(self.object.link_description)
return self.object
def get_success_url(self):
self.success_url = redirect('course:links:render_link', id = self.object.id)
return self.success_url
class ViewLink(LoginRequiredMixin,HasRoleMixin,generic.DetailView):
allowed_roles = ['professor', 'system_admin']
template_name = 'links/view_link.html'
success_url = reverse_lazy('course:links:render_link')
context_object_name = 'link'
def get_context_data(self,**kwargs):
context = {}
link = Link.objects.get(slug = self.kwargs.get('slug'))
context['link'] = link
return context
def get_success_url(self):
self.success_url = redirect('course:links:render_link', id = self.object.id)
return self.success_url
def get_queryset(self):
self.queryset = Link.objects.filter(slug = self.kwargs.get('slug'))
return self.queryset