Improve automatic emails with temporary urls

This MR targets the improvement for automatic emails concerning validation of new users by supervisors/re-validation of users.

Fixes #542 (closed)

Fixes #550 (closed)

beat/web/accounts/management/commands/clean_expired_temporary_urls.py

+#!/usr/bin/env python
+# vim: set fileencoding=utf-8 :
+# encoding: utf-8
+
+###############################################################################
+#                                                                             #
+# Copyright (c) 2020 Idiap Research Institute, http://www.idiap.ch/           #
+# Contact: beat.support@idiap.ch                                              #
+#                                                                             #
+# This file is part of the beat.web module of the BEAT platform.              #
+#                                                                             #
+# Commercial License Usage                                                    #
+# Licensees holding valid commercial BEAT licenses may use this file in       #
+# accordance with the terms contained in a written agreement between you      #
+# and Idiap. For further information contact tto@idiap.ch                     #
+#                                                                             #
+# Alternatively, this file may be used under the terms of the GNU Affero      #
+# Public License version 3 as published by the Free Software and appearing    #
+# in the file LICENSE.AGPL included in the packaging of this file.            #
+# The BEAT platform is distributed in the hope that it will be useful, but    #
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY  #
+# or FITNESS FOR A PARTICULAR PURPOSE.                                        #
+#                                                                             #
+# You should have received a copy of the GNU Affero Public License along      #
+# with the BEAT platform. If not, see http://www.gnu.org/licenses/.           #
+#                                                                             #
+###############################################################################
+
+
+from django.core.management.base import BaseCommand
+
+import datetime
+import sys
+
+from ...models import TemporaryUrl
+
+
+class Command(BaseCommand):
+
+    help = 'Clean expired temporary urls'
+
+    def add_arguments(self, parser):
+        parser.add_argument('--noinput', action='store_false', dest='interactive', default=False,
+                            help=('Tells Django to NOT prompt the user for input of any kind.'))
+
+
+    def handle(self, *args, **options):
+
+        if options['interactive']:
+            try:
+                answer = self.get_input_data('Clean expired temporary url(s) that have not been used?  (y/n)? ', 'y').lower()
+            except KeyboardInterrupt:
+                self.stderr.write("\nOperation canceled.")
+                sys.exit(1)
+
+            if answer != 'y':
+                self.stdout.write('Clean expired temporary urls operation canceled')
+                sys.exit(1)
+
+        temporary_urls_count = TemporaryUrl.objects.all().count()
+        now = datetime.datetime.now()
+        count, _ = TemporaryUrl.objects.filter(expires__lt=now).delete()
+        self.stdout.write('{} Expired temporary url(s) successfully cleaned/'.format(count) + '{} Total temporary url(s) checked'.format(temporary_urls_count))
+
+
+    def get_input_data(self, message, default=None):
+        """
+        Override this method if you want to customize data inputs or
+        validation exceptions.
+        """
+        raw_value = raw_input(message)
+
+        if default and raw_value == '':
+            raw_value = default
+
+        return raw_value