recovery(new): add recovery app to create recovery links

passbook/recovery/management/commands/create_recovery_key.py

@@ -0,0 +1,46 @@
+"""passbook recovery createkey command"""
+from datetime import timedelta
+from getpass import getuser
+
+from django.core.management.base import BaseCommand
+from django.urls import reverse
+from django.utils.timezone import now
+from django.utils.translation import gettext as _
+from structlog import get_logger
+
+from passbook.core.models import Nonce, User
+from passbook.lib.config import CONFIG
+
+LOGGER = get_logger()
+
+
+class Command(BaseCommand):
+    """Create Nonce used to recover access"""
+
+    help = _('Create a Key which can be used to restore access to passbook.')
+
+    def add_arguments(self, parser):
+        parser.add_argument('duration', default=1, action='store',
+                            help='How long the token is valid for (in years).')
+        parser.add_argument('user', action='store',
+                            help='Which user the Token gives access to.')
+
+    def get_url(self, nonce: Nonce) -> str:
+        """Get full recovery link"""
+        path = reverse('passbook_recovery:use-nonce', kwargs={'uuid': str(nonce.uuid)})
+        return f"https://{CONFIG.y('domain')}{path}"
+
+    def handle(self, *args, **options):
+        """Create Nonce used to recover access"""
+        duration = int(options.get('duration', 1))
+        delta = timedelta(days=duration * 365.2425)
+        _now = now()
+        expiry = _now + delta
+        user = User.objects.get(username=options.get('user'))
+        nonce = Nonce.objects.create(
+            expires=expiry,
+            user=user,
+            description=f'Recovery Nonce generated by {getuser()} on {_now}')
+        self.stdout.write((f"Store this link safely, as it will allow"
+                           f" anyone to access passbook as {user}."))
+        self.stdout.write(self.get_url(nonce))