update statistics

app/statistik/views.py

@@ -0,0 +1,85 @@
+from django.views.generic import TemplateView
+from django.db.models import Count, Q
+from django.utils import timezone
+from datetime import datetime
+from bird.models import FallenBird, Bird, BirdStatus
+
+
+class StatistikView(TemplateView):
+    template_name = 'statistik/overview.html'
+    
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        
+        # Aktuelles Jahr
+        current_year = timezone.now().year
+        
+        # 1. Übersicht über das aktuelle Jahr
+        context['current_year'] = current_year
+        
+        # Patienten dieses Jahr aufgenommen
+        patients_this_year = FallenBird.objects.filter(
+            date_found__year=current_year
+        ).count()
+        context['patients_this_year'] = patients_this_year
+        
+        # Aktuell in Behandlung oder Auswilderung
+        in_treatment_or_release = FallenBird.objects.filter(
+            date_found__year=current_year,
+            status__id__in=[1, 2]  # In Behandlung, In Auswilderung
+        ).count()
+        context['in_treatment_or_release'] = in_treatment_or_release
+        
+        # Ausgewildert + Übermittelt dieses Jahr
+        rescued_this_year = FallenBird.objects.filter(
+            date_found__year=current_year,
+            status__id__in=[3, 4]  # Ausgewildert, Übermittelt
+        ).count()
+        context['rescued_this_year'] = rescued_this_year
+        
+        # 2. Übersicht über alle Jahre
+        total_patients = FallenBird.objects.count()
+        context['total_patients'] = total_patients
+        
+        total_rescued = FallenBird.objects.filter(
+            status__id__in=[3, 4]  # Ausgewildert, Übermittelt
+        ).count()
+        context['total_rescued'] = total_rescued
+        
+        # 3. Statistik pro Vogelart
+        bird_stats = []
+        for bird in Bird.objects.all():
+            fallen_birds = FallenBird.objects.filter(bird=bird)
+            
+            total_count = fallen_birds.count()
+            rescued_count = fallen_birds.filter(status__id__in=[3, 4]).count()
+            deceased_count = fallen_birds.filter(status__id=5).count()
+            
+            if total_count > 0:  # Nur Vögel anzeigen, die auch Patienten haben
+                bird_stats.append({
+                    'name': bird.name,
+                    'species': bird.species or 'Unbekannt',
+                    'total': total_count,
+                    'rescued': rescued_count,
+                    'deceased': deceased_count,
+                    'rescued_percentage': round((rescued_count / total_count) * 100, 1) if total_count > 0 else 0,
+                    'deceased_percentage': round((deceased_count / total_count) * 100, 1) if total_count > 0 else 0
+                })
+        
+        # Sortiere nach Gesamtanzahl (absteigend)
+        bird_stats.sort(key=lambda x: x['total'], reverse=True)
+        context['bird_stats'] = bird_stats
+        
+        # Status-Namen für das Template
+        try:
+            context['status_names'] = {
+                1: BirdStatus.objects.get(id=1).description,
+                2: BirdStatus.objects.get(id=2).description,
+                3: BirdStatus.objects.get(id=3).description,
+                4: BirdStatus.objects.get(id=4).description,
+                5: BirdStatus.objects.get(id=5).description,
+            }
+        except BirdStatus.DoesNotExist:
+            context['status_names'] = {}
+        
+        return context