Added statistics management command

boards/management/commands/statistics.py

@@ -0,0 +1,28 b''
+from django.core.management import BaseCommand
+
+from boards.models import Attachment
+from boards.utils import get_domain
+
+
+class Command(BaseCommand):
+    help = 'Gather board statistics'
+
+    def handle(self, *args, **options):
+        domains = {}
+        for attachment in Attachment.objects.exclude(url=None):
+            full_domain = attachment.url.split('/')[2]
+            domain = get_domain(full_domain)
+            if domain in domains:
+                domains[domain] += 1
+            else:
+                domains[domain] = 1
+
+        print('* Domains and their usage')
+        for domain in domains:
+            print('{}: {}'.format(domain, domains[domain]))
+
+        print('* Overall numbers')
+        print('{} attachments in the system, {} of them as URLs'.format(
+            Attachment.objects.count(),
+            Attachment.objects.exclude(url=None).count()))
+

boards/models/attachment/viewers.py

@@ -11,6 +11,7 b' from boards.utils import get_domain'
 FILE_STUB_IMAGE = 'images/file.png'
 FILE_STUB_URL = 'url'
 
+
 FILE_TYPES_VIDEO = (
     'webm',
     'mp4',