Initial commit: WrestleDesk full project

- Django backend with DRF (clubs, wrestlers, trainers, exercises, templates, trainings, homework, locations, leistungstest)
- Next.js 16 frontend with React, Shadcn UI, Tailwind
- JWT authentication
- Full CRUD for all entities
- Calendar view for trainings
- Homework management system
- Leistungstest tracking

backend/stats/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class StatsConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'stats'

backend/stats/views.py

@@ -0,0 +1,92 @@
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.permissions import IsAuthenticated
+from rest_framework.response import Response
+from django.db.models import Count
+from datetime import datetime, timedelta
+from wrestlers.models import Wrestler
+from trainers.models import Trainer
+from trainings.models import Training, Attendance
+from homework.models import TrainingHomeworkAssignment
+
+
+@api_view(['GET'])
+@permission_classes([IsAuthenticated])
+def dashboard_stats(request):
+    today = datetime.now().date()
+    week_start = today - timedelta(days=today.weekday())
+    two_weeks_ago = today - timedelta(days=14)
+    
+    # Wrestlers stats
+    total_wrestlers = Wrestler.objects.count()
+    wrestlers_this_week = Wrestler.objects.filter(
+        created_at__date__gte=week_start
+    ).count()
+    
+    # Trainers stats
+    total_trainers = Trainer.objects.count()
+    active_trainers = Trainer.objects.filter(is_active=True).count()
+    
+    # Trainings stats
+    total_trainings = Training.objects.count()
+    trainings_this_week = Training.objects.filter(
+        date__gte=week_start
+    ).count()
+    
+    # Homework stats
+    open_homework = TrainingHomeworkAssignment.objects.filter(is_completed=False).count()
+    completed_homework = TrainingHomeworkAssignment.objects.filter(is_completed=True).count()
+    
+    # Attendance by group this week
+    trainings_this_week_qs = Training.objects.filter(date__gte=week_start)
+    attendance_data = {}
+    for group, label in [('kids', 'Kinder'), ('youth', 'Jugend'), ('adults', 'Erwachsene')]:
+        group_wrestlers = Wrestler.objects.filter(group=group)
+        attended = Attendance.objects.filter(
+            training__in=trainings_this_week_qs,
+            wrestler__in=group_wrestlers
+        ).values('wrestler').distinct().count()
+        total = group_wrestlers.count()
+        attendance_data[group] = {
+            'attended': attended,
+            'total': total,
+            'percent': int((attended / total * 100) if total > 0 else 0)
+        }
+    
+    # Activity (last 14 days)
+    activity = []
+    for i in range(14):
+        day = today - timedelta(days=13 - i)
+        count = Attendance.objects.filter(training__date=day).count()
+        activity.append({'date': day.isoformat(), 'count': count})
+    
+    # Wrestlers by group
+    wrestlers_by_group = {
+        'kids': Wrestler.objects.filter(group='kids', is_active=True).count(),
+        'youth': Wrestler.objects.filter(group='youth', is_active=True).count(),
+        'adults': Wrestler.objects.filter(group='adults', is_active=True).count(),
+        'inactive': Wrestler.objects.filter(is_active=False).count(),
+    }
+    
+    # Top trainers (by training count)
+    trainer_stats = Trainer.objects.annotate(
+        training_count=Count('trainings')
+    ).order_by('-training_count')[:5]
+    top_trainers = [
+        {'name': t.first_name + ' ' + t.last_name[0] + '.', 'training_count': t.training_count}
+        for t in trainer_stats
+    ]
+    
+    return Response({
+        'wrestlers': {'total': total_wrestlers, 'this_week': wrestlers_this_week},
+        'trainers': {'total': total_trainers, 'active': active_trainers},
+        'trainings': {'total': total_trainings, 'this_week': trainings_this_week},
+        'homework': {'open': open_homework, 'completed': completed_homework},
+        'attendance': {
+            'this_week': attendance_data,
+            'average': Attendance.objects.filter(training__date__gte=week_start).values('training').distinct().count(),
+            'expected': total_wrestlers
+        },
+        'activity': activity,
+        'wrestlers_by_group': wrestlers_by_group,
+        'top_trainers': top_trainers,
+    })