implement report feature

app/reports/services.py

@@ -0,0 +1,187 @@
+import csv
+from io import StringIO
+from datetime import date
+from django.db.models import Q
+from django.core.mail import EmailMessage
+from django.template.loader import render_to_string
+from django.conf import settings
+from django.core.files.base import ContentFile
+from bird.models import FallenBird
+
+
+class ReportGenerator:
+    """Service class for generating bird reports."""
+    
+    def __init__(self, date_from, date_to, include_naturschutzbehoerde=True, include_jagdbehoerde=False):
+        self.date_from = date_from
+        self.date_to = date_to
+        self.include_naturschutzbehoerde = include_naturschutzbehoerde
+        self.include_jagdbehoerde = include_jagdbehoerde
+    
+    def get_birds_queryset(self):
+        """Get queryset of birds based on filters."""
+        # Date filter
+        queryset = FallenBird.objects.filter(
+            date_found__gte=self.date_from,
+            date_found__lte=self.date_to
+        )
+        
+        # Bird type filter based on notification settings
+        bird_filter = Q()
+        
+        if self.include_naturschutzbehoerde:
+            bird_filter |= Q(bird__melden_an_naturschutzbehoerde=True)
+        
+        if self.include_jagdbehoerde:
+            bird_filter |= Q(bird__melden_an_jagdbehoerde=True)
+        
+        if bird_filter:
+            queryset = queryset.filter(bird_filter)
+        
+        return queryset.select_related('bird', 'status', 'aviary', 'user').order_by('date_found')
+    
+    def generate_csv(self):
+        """Generate CSV content and return as string with bird count."""
+        birds = self.get_birds_queryset()
+        bird_count = birds.count()
+        
+        # Create CSV in memory
+        output = StringIO()
+        writer = csv.writer(output, delimiter=';', quoting=csv.QUOTE_ALL)
+        
+        # Header row
+        headers = [
+            'Vogel',
+            'Alter',
+            'Geschlecht',
+            'Gefunden am',
+            'Fundort',
+            'Fundumstände',
+            'Diagnose bei Fund',
+            'Status'
+        ]
+        writer.writerow(headers)
+        
+        # Data rows
+        for bird in birds:
+            row = [
+                bird.bird.name if bird.bird else '',
+                bird.get_age_display() if bird.age else '',
+                bird.get_sex_display() if bird.sex else '',
+                bird.date_found.strftime('%d.%m.%Y') if bird.date_found else '',
+                bird.place or '',
+                bird.find_circumstances or '',
+                bird.diagnostic_finding or '',
+                bird.status.description if bird.status else '',
+            ]
+            writer.writerow(row)
+        
+        csv_content = output.getvalue()
+        output.close()
+        
+        return csv_content, bird_count
+    
+    def get_filename(self):
+        """Generate filename for the report."""
+        return f"wildvogelhilfe_report_{self.date_from}_{self.date_to}.csv"
+    
+    def get_summary(self):
+        """Get summary statistics for the report."""
+        birds = self.get_birds_queryset()
+        
+        summary = {
+            'total_birds': birds.count(),
+            'naturschutz_birds': birds.filter(bird__melden_an_naturschutzbehoerde=True).count() if self.include_naturschutzbehoerde else 0,
+            'jagd_birds': birds.filter(bird__melden_an_jagdbehoerde=True).count() if self.include_jagdbehoerde else 0,
+            'date_from': self.date_from,
+            'date_to': self.date_to,
+        }
+        
+        return summary
+    
+    def send_email_report(self, email_addresses, automatic_report=None):
+        """Send the report via email to specified addresses."""
+        from .models import ReportLog
+        
+        csv_content, bird_count = self.generate_csv()
+        filename = self.get_filename()
+        
+        # Prepare email context
+        context = {
+            'date_from': self.date_from.strftime('%d.%m.%Y'),
+            'date_to': self.date_to.strftime('%d.%m.%Y'),
+            'patient_count': bird_count,
+            'filter_naturschutzbehörde': self.include_naturschutzbehoerde,
+            'filter_jagdbehörde': self.include_jagdbehoerde,
+            'automatic_report': automatic_report,
+            'created_at': date.today().strftime('%d.%m.%Y'),
+        }
+        
+        # Render email templates
+        subject = render_to_string('reports/email/report_subject.txt', context).strip()
+        message = render_to_string('reports/email/report_message.txt', context)
+        
+        # Create email
+        email = EmailMessage(
+            subject=subject,
+            body=message,
+            from_email=getattr(settings, 'DEFAULT_FROM_EMAIL', 'noreply@wildvogelhilfe-jena.de'),
+            to=email_addresses,
+        )
+        
+        # Attach CSV file
+        email.attach(filename, csv_content, 'text/csv')
+        
+        try:
+            # Send email
+            email.send()
+            
+            # Create log entry
+            report_log = ReportLog.objects.create(
+                automatic_report=automatic_report,
+                date_from=self.date_from,
+                date_to=self.date_to,
+                patient_count=bird_count,
+                include_naturschutzbehörde=self.include_naturschutzbehoerde,
+                include_jagdbehörde=self.include_jagdbehoerde,
+                email_sent_to=email_addresses,
+            )
+            
+            # Save CSV file to the log
+            report_log.csv_file.save(
+                filename,
+                ContentFile(csv_content.encode('utf-8')),
+                save=True
+            )
+            
+            return report_log, True, None
+            
+        except Exception as e:
+            return None, False, str(e)
+    
+    def create_download_log(self, automatic_report=None):
+        """Create a log entry for downloaded reports."""
+        from .models import ReportLog
+        
+        csv_content, bird_count = self.generate_csv()
+        filename = self.get_filename()
+        
+        # Create log entry
+        report_log = ReportLog.objects.create(
+            automatic_report=automatic_report,
+            date_from=self.date_from,
+            date_to=self.date_to,
+            patient_count=bird_count,
+            include_naturschutzbehörde=self.include_naturschutzbehoerde,
+            include_jagdbehörde=self.include_jagdbehoerde,
+            email_sent_to=[],  # Empty list indicates download
+        )
+        
+        # Save CSV file to the log
+        report_log.csv_file.save(
+            filename,
+            ContentFile(csv_content.encode('utf-8')),
+            save=True
+        )
+        
+        return report_log