stage2/views.py

   1 # -*- coding: utf-8 -*-
   2 from django.contrib.auth.decorators import login_required
   3 from django.core.urlresolvers import reverse
   4 from django.http import Http404
   5 from django.http.response import HttpResponseRedirect, HttpResponse, HttpResponseForbidden
   6 from django.shortcuts import get_object_or_404, render
   7 from django.utils import timezone
   8 from django.utils.cache import patch_cache_control
   9 from django.views.decorators.cache import never_cache
  10 from django.views.decorators.http import require_POST
  11 from unidecode import unidecode
  12
  13 from stage2.forms import AttachmentForm, MarkForm
  14 from stage2.models import Participant, Assignment, Answer, Attachment, Mark
  15
  16
  17 def all_assignments(participant):
  18     assignments = Assignment.objects.all()
  19     for assignment in assignments:
  20         assignment.answer = assignment.answer_set.filter(participant=participant).first()
  21         assignment.forms = [
  22             (AttachmentForm(assignment=assignment, file_no=i, label=label, extensions=ext),
  23              assignment.answer.attachment_set.filter(file_no=i).first() if assignment.answer else None)
  24             for i, (label, ext) in enumerate(assignment.file_descriptions, 1)]
  25     return assignments
  26
  27
  28 @never_cache
  29 def participant_view(request, participant_id, key):
  30     participant = get_object_or_404(Participant, id=participant_id)
  31     if not participant.check(key):
  32         raise Http404
  33     response = render(request, 'stage2/participant.html', {
  34         'participant': participant,
  35         'assignments': all_assignments(participant)})
  36     # not needed in Django 1.8
  37     patch_cache_control(response, no_cache=True, no_store=True, must_revalidate=True)
  38     return response
  39
  40
  41 @require_POST
  42 def upload(request, assignment_id, participant_id, key):
  43     participant = get_object_or_404(Participant, id=participant_id)
  44     if not participant.check(key):
  45         raise Http404
  46     assignment = get_object_or_404(Assignment, id=assignment_id)
  47     now = timezone.now()
  48     if assignment.deadline < now:
  49         raise Http404  # TODO za późno
  50     for i, (label, ext) in enumerate(assignment.file_descriptions, 1):
  51         answer, created = Answer.objects.get_or_create(participant=participant, assignment=assignment)
  52         attachment, created = Attachment.objects.get_or_create(answer=answer, file_no=i)
  53         form = AttachmentForm(
  54             data=request.POST, files=request.FILES,
  55             assignment=assignment, file_no=i, label=label, instance=attachment, extensions=ext)
  56         if form.is_valid():
  57             form.save()
  58     return HttpResponseRedirect(reverse('stage2_participant', args=(participant_id, key)))
  59
  60
  61 def attachment_download(attachment):
  62     response = HttpResponse(content_type='application/force-download')
  63     response.write(attachment.file.read())
  64     # workaround to this: https://code.djangoproject.com/ticket/20889
  65     response['Content-Disposition'] = 'attachment; filename="%s"' % unidecode(attachment.filename().replace('\n', ' '))
  66     response['Content-Length'] = response.tell()
  67     return response
  68
  69
  70 def get_file(request, assignment_id, file_no, participant_id, key):
  71     """We want to serve submitted files back to participants, but also validate their keys,
  72        so static files are not good"""
  73     participant = get_object_or_404(Participant, id=participant_id)
  74     if not participant.check(key):
  75         raise Http404
  76     assignment = get_object_or_404(Assignment, id=assignment_id)
  77     answer = get_object_or_404(Answer, participant=participant, assignment=assignment)
  78     attachment = get_object_or_404(Attachment, answer=answer, file_no=file_no)
  79     return attachment_download(attachment)
  80
  81
  82 @login_required
  83 def assignment_list(request):
  84     assignments = request.user.stage2_assignments.all()
  85     if not assignments:
  86         return HttpResponseForbidden('Not allowed')
  87     for assignment in assignments:
  88         assignment.marked_count = Mark.objects.filter(expert=request.user, answer__assignment=assignment).count()
  89         assignment.to_mark_count = assignment.available_answers(request.user).count()
  90     non_empty_assignments = [ass for ass in assignments if ass.marked_count > 0 or ass.to_mark_count > 0]
  91     if len(non_empty_assignments) == 1 and non_empty_assignments[0].to_mark_count > 0:
  92         return HttpResponseRedirect(reverse('stage2_answer_list', args=[non_empty_assignments[0].id]))
  93     return render(request, 'stage2/assignment_list.html', {'assignments': assignments})
  94
  95
  96 def available_answers(assignment, expert, answer_with_errors=None, form_with_errors=None, marked=False):
  97     if marked:
  98         answers = Answer.objects.filter(mark__expert=expert, assignment=assignment)
  99     else:
 100         answers = assignment.available_answers(expert)
 101     answers = answers.order_by('participant__last_name').prefetch_related('attachment_set')
 102     for answer in answers:
 103         attachments = answer.attachment_set.all()
 104         attachments_by_file_no = {attachment.file_no: attachment for attachment in attachments}
 105         answer.attachments = [
 106             (desc, attachments_by_file_no.get(i))
 107             for (i, (desc, ext)) in enumerate(assignment.file_descriptions, 1)]
 108         if answer == answer_with_errors:
 109             answer.form = form_with_errors
 110         else:
 111             answer.form = MarkForm(
 112                 answer=answer, instance=answer.mark_set.filter(expert=expert).first(), prefix='ans%s' % answer.id)
 113     return answers
 114
 115
 116 @login_required
 117 def answer_list(request, assignment_id):
 118     assignment = get_object_or_404(Assignment, id=assignment_id)
 119     if request.user not in assignment.experts.all():
 120         return HttpResponseForbidden('Not allowed')
 121     return render(request, 'stage2/answer_list.html',
 122                   {'answers': available_answers(assignment, request.user), 'assignment': assignment})
 123
 124
 125 @login_required
 126 def marked_answer_list(request, assignment_id):
 127     assignment = get_object_or_404(Assignment, id=assignment_id)
 128     if request.user not in assignment.experts.all():
 129         return HttpResponseForbidden('Not allowed')
 130     return render(request, 'stage2/answer_list.html', {
 131         'answers': available_answers(assignment, request.user, marked=True),
 132         'assignment': assignment,
 133         'marked': True,
 134     })
 135
 136
 137 @login_required
 138 def expert_download(request, attachment_id):
 139     attachment = get_object_or_404(Attachment, id=attachment_id)
 140     return attachment_download(attachment)
 141
 142
 143 @require_POST
 144 @login_required
 145 def mark_answer(request, answer_id):
 146     answer = get_object_or_404(Answer, id=answer_id)
 147     if request.user not in answer.assignment.experts.all():
 148         return HttpResponseForbidden('Not allowed')
 149     if answer.assignment.is_active():
 150         return HttpResponseForbidden('Not allowed')
 151     mark, created = Mark.objects.get_or_create(answer=answer, expert=request.user, defaults={'points': 0})
 152     form = MarkForm(data=request.POST, answer=answer, instance=mark, prefix='ans%s' % answer.id)
 153     if form.is_valid():
 154         form.save()
 155     elif created:
 156         mark.delete()
 157
 158     return HttpResponseRedirect(reverse(
 159         'stage2_answer_list' if created else 'stage2_marked_answers', args=[answer.assignment_id]))