add autolockarticles management command

markupwiki/management/commands/autolockarticles.py

@@ -0,0 +1,22 @@
+from django.conf import settings
+from django.core.management.base import BaseCommand, CommandError
+from django.db.models import Min
+from markupwiki.models import Article, PUBLIC, LOCKED, DELETED
+import datetime
+
+class Command(BaseCommand):
+    help = 'Auto-locks articles based on time and other factors'
+
+    def handle(self, *args, **options):
+        ''' Lock any public article that was created earlier than
+            MARKUPWIKI_AUTOLOCK_TIMEDELTA ago.
+        '''
+        
+        timedelta = getattr(settings, 'MARKUPWIKI_AUTOLOCK_TIMEDELTA', None)
+        
+        if timedelta is not None:
+            
+            ts = datetime.datetime.now() - timedelta
+            qs = Article.objects.filter(status=PUBLIC).annotate(
+                    timestamp=Min('versions__timestamp')).filter(timestamp__lte=ts)
+            qs.update(status=LOCKED)