from django.views.generic import DeleteView
from django.http import HttpResponseRedirect
from django.contrib import messages

class DeleteCheckView(DeleteView):
	""" Check if object actually can be deleted. Provide reasons to template
	    if not.
	"""
	def delete(self, request, *args, **kwargs):
		self.object = self.get_object()
		success_url = self.get_success_url()

		reasons = self.object.getNoDeleteReasons()
		if reasons:
			# do not delete, do what get does...
			return self.get(request, *args, **kwargs)
		else:
			self.object.delete()
			messages.info(request, "Object %s has been deleted" % self.object.handle)
			return HttpResponseRedirect(success_url)

	def get_context_data(self, **kwargs):
		if 'reasons' not in kwargs:
			kwargs['reasons'] = self.object.getNoDeleteReasons()
		return super(DeleteCheckView, self).get_context_data(**kwargs)