hw6, hw7

- Redis / Celery / Celery Beat
- кэширование популярных тегов и лучших участников
- асинхронные уведомления в Centrifugo
- отправка email-уведомлений через Celery
- полнотекстовый поиск и подсказки
- Docker Compose инфраструктура

questions/context_processors.py

@@ -0,0 +1,55 @@
+from datetime import timedelta
+from django.utils import timezone
+from django.core.cache import cache
+from django.contrib.auth.models import User
+from django.db.models import Count, Q
+
+from .models import Tag
+
+
+def sidebar_data(request):
+    popular_tags = cache.get('popular_tags')
+    best_members = cache.get('best_members')
+
+    if popular_tags is None:
+        three_months_ago = timezone.now() - timedelta(days=90)
+        popular_qs = Tag.objects.annotate(
+            q_count=Count('question', filter=Q(question__created_at__gte=three_months_ago))
+        ).order_by('-q_count')[:10]
+        popular_tags = [
+            {'name': tag.name, 'count': tag.q_count}
+            for tag in popular_qs
+        ]
+        cache.set('popular_tags', popular_tags, timeout=60 * 60)
+
+    if best_members is None:
+        week_ago = timezone.now() - timedelta(days=7)
+        users_q = User.objects.annotate(
+            q_count=Count('question', filter=Q(question__created_at__gte=week_ago))
+        )
+        users_a = User.objects.annotate(
+            a_count=Count('answer', filter=Q(answer__created_at__gte=week_ago)))
+
+        scores = {}
+        for u in users_q:
+            scores[u.id] = scores.get(u.id, 0) + (u.q_count or 0)
+        for u in users_a:
+            scores[u.id] = scores.get(u.id, 0) + (u.a_count or 0)
+
+        best_members_list = User.objects.filter(id__in=list(scores.keys()))
+        best_members = [
+            {
+                'id': u.id,
+                'username': u.username,
+                'score': scores.get(u.id, 0)
+            }
+            for u in best_members_list
+        ]
+        best_members.sort(key=lambda x: x['score'], reverse=True)
+        best_members = best_members[:10]
+        cache.set('best_members', best_members, timeout=60 * 60)
+
+    return {
+        'popular_tags': popular_tags,
+        'best_members': best_members,
+    }