Add submission activity chart

judge/views/user.py

@@ -11,6 +11,8 @@ from django.contrib.auth.views import redirect_to_login
 from django.contrib.contenttypes.models import ContentType
 from django.db import transaction
 from django.db.models import Count, Max, Min
+from django.db.models.fields import DateField
+from django.db.models.functions import Cast, ExtractYear
 from django.http import Http404, HttpResponseRedirect, JsonResponse
 from django.shortcuts import get_object_or_404, render
 from django.urls import reverse
@@ -149,6 +151,25 @@ class UserAboutPage(UserPage):
             ratio = (max_ever - max_user) / (max_ever - min_ever) if max_ever != min_ever else 1.0
             context['max_graph'] = max_user + ratio * delta
             context['min_graph'] = min_user + ratio * delta - delta
+
+
+        submissions = (
+            self.object.submission_set
+            .annotate(date_only=Cast('date', DateField()))
+            .values('date_only').annotate(cnt=Count('id'))
+        )
+
+        context['submission_data'] = mark_safe(json.dumps({
+            date_counts['date_only'].isoformat(): date_counts['cnt'] for date_counts in submissions
+        }))
+        context['submission_metadata'] = mark_safe(json.dumps({
+            'min_year': (
+                self.object.submission_set
+                .annotate(year_only=ExtractYear('date'))
+                .aggregate(min_year=Min('year_only'))['min_year']
+            ),
+        }))
+        
         return context
 
     # follow/unfollow user