rotate items in discover

catalog/views.py

@@ -1,18 +1,17 @@
 import logging
 
-from django.contrib.auth.decorators import login_required, permission_required
+from django.contrib.auth.decorators import login_required
 from django.core.cache import cache
-from django.core.exceptions import BadRequest, ObjectDoesNotExist, PermissionDenied
 from django.core.paginator import Paginator
 from django.db.models import Count
 from django.http import Http404
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from django.views.decorators.clickjacking import xframe_options_exempt
 from django.views.decorators.http import require_http_methods
 
-from common.config import PAGE_LINK_NUMBER
 from common.utils import PageLinksGenerator, get_uuid_or_404, user_identity_required
 from journal.models import (
     Comment,
@@ -262,13 +261,11 @@ def discover(request):
     cache_key = "public_gallery"
     gallery_list = cache.get(cache_key, [])
 
-    # for gallery in gallery_list:
-    #     ids = (
-    #         random.sample(gallery["item_ids"], 10)
-    #         if len(gallery["item_ids"]) > 10
-    #         else gallery["item_ids"]
-    #     )
-    #     gallery["items"] = Item.objects.filter(id__in=ids)
+    # rotate every 6 minutes
+    rot = timezone.now().minute // 6
+    for gallery in gallery_list:
+        i = rot * len(gallery["items"]) // 10
+        gallery["items"] = gallery["items"][i:] + gallery["items"][:i]
 
     if request.user.is_authenticated:
         if not request.user.registration_complete: