Adding django-admin command for certificate_restriction

common/djangoapps/student/management/commands/cert_restriction.py

+from django.core.management.base import BaseCommand, CommandError
+import os
+from optparse import make_option
+from student.models import UserProfile
+import csv
+
+
+class Command(BaseCommand):
+
+    help = """
+    Sets or gets certificate restrictions for users
+    from embargoed countries.
+
+    Import a list of students to restrict certificate download
+    by setting "allow_certificate" to True in userprofile:
+
+        $ ... cert_restriction --import path/to/userlist.csv
+
+    CSV should be comma delimited with double quoted entries.
+
+    Export a list of students who have "allow_certificate" in
+    userprofile set to True
+
+        $ ... cert_restriction --export path/to/export.csv
+
+    """
+
+    option_list = BaseCommand.option_list + (
+        make_option('-i', '--import',
+                    metavar='IMPORT_FILE',
+                    dest='import',
+                    default=False,
+                    help='csv file to import, comma delimitted file with '
+                         'double-quoted entries'),
+        make_option('-o', '--output',
+                    metavar='EXPORT_FILE',
+                    dest='output',
+                    default=False,
+                    help='csv file to export'),
+        make_option('-e', '--enable',
+                    metavar='STUDENT',
+                    dest='enable',
+                    default=False,
+                    help="enable a single student's certificate"),
+        make_option('-d', '--disable',
+                    metavar='STUDENT',
+                    dest='disable',
+                    default=False,
+                    help="disable a single student's certificate")
+    )
+
+    def handle(self, *args, **options):
+
+        if options['output']:
+
+            if os.path.exists(options['output']):
+                raise CommandError("File {0} already exists".format(
+                    options['output']))
+            disabled_users = UserProfile.objects.filter(
+                allow_certificate=False)
+
+            with open(options['output'], 'w') as csvfile:
+                csvwriter = csv.writer(csvfile, delimiter=',', quotechar='"',
+                                       quoting=csv.QUOTE_MINIMAL)
+                for user in disabled_users:
+                    csvwriter.writerow([user.username])
+
+        elif options['input']:
+
+            if not os.path.exists(options['input']):
+                raise CommandError("File {0} does not exist".format(
+                    options['input']))
+
+            print "Importing students from {0}".format(options['input'])
+
+            students = None
+            with open(options['input']) as csvfile:
+                student_list = csv.reader(csvfile, delimiter=',',
+                                          quotechar='"')
+                students = [student[0] for student in student_list]
+            if not students:
+                raise CommandError(
+                    "Unable to read student data from {0}".format(
+                        options['input']))
+            UserProfile.objects.filter(username__in=students).update(
+                allow_certificate=False)
+
+        elif options['enable']:
+
+            print "Enabling {0} for certificate download".format(
+                options['enable'])
+            cert_allow = UserProfile.objects.get(user=options['enable'])
+            cert_allow.allow_certificate = True
+            cert_allow.save()
+
+        elif options['disable']:
+
+            print "Disabling {0} for certificate download".format(
+                options['disable'])
+            cert_allow = UserProfile.objects.get(user=options['disable'])
+            cert_allow.allow_certificate = False
+            cert_allow.save()