troeger / opensubmit

               .replace("#LASTNAME#", user.last_name.strip())   \

               .replace("#COURSENAME#", course.title.strip())

@login_required

@staff_member_required

def mail2all(request, course_id):

    course = get_object_or_404(Course, pk=course_id)

    # Re-compute list of recipients on every request, for latest updates

    students = User.objects.filter(profile__courses__pk=course_id)

    maillist = ','.join(students.values_list('email', flat=True))

    if request.method == "POST":

        if 'subject' in request.POST and 'message' in request.POST:

            # Initial form submission, render preview

            request.session['subject'] = request.POST['subject']

            request.session['message'] = request.POST['message']

            student = students[0]

            preview_subject = _replace_placeholders(

                request.POST['subject'], student, course)

            preview_message = _replace_placeholders(

                request.POST['message'], student, course)

            return render(request, 'mail_preview.html',

                          {'preview_subject': preview_subject,

                           'preview_message': preview_message,

                           'preview_from': request.user.email,

                           'course': course})

        elif 'subject' in request.session and 'message' in request.session:

            # Positive preview, send it

            data = [(_replace_placeholders(request.session['subject'], s, course),

                           'course': course})

        elif 'subject' in request.session and 'message' in request.session:

            # Positive preview, send it

            data = [(_replace_placeholders(request.session['subject'], s, course),

                     _replace_placeholders(

                         request.session['message'], s, course),

                     request.user.email,

                     [s.email]) for s in students]

            sent = send_mass_mail(data, fail_silently=True)

            messages.add_message(request, messages.INFO,

                                 '%u message(s) sent.' % sent)

            return redirect('teacher:index')

    # show empty form in all other cases

    mailform = MailForm()

    return render(request, 'mail_form.html', {'maillist': maillist, 'course': course, 'mailform': mailform})

@login_required

@staff_member_required

def coursearchive(request, course_id):

    '''

        Provides all course submissions and their information as archive download.

        For archiving purposes, since withdrawn submissions are included.

    '''

    output = io.BytesIO()

    z = zipfile.ZipFile(output, 'w')