Export Button geht jetzt

v2_adminpanel/utils/export.py

@@ -1,9 +1,10 @@
 import pandas as pd
-from io import BytesIO
+from io import BytesIO, StringIO
 from datetime import datetime
 from zoneinfo import ZoneInfo
 from openpyxl.utils import get_column_letter
 from flask import send_file
+import csv
 
 
 def create_excel_export(data, columns, filename_prefix="export"):
@@ -35,6 +36,34 @@ def create_excel_export(data, columns, filename_prefix="export"):
     )
 
 
+def create_csv_export(data, columns, filename_prefix="export"):
+    """Create a CSV file from data"""
+    # Create CSV in memory
+    output = StringIO()
+    writer = csv.writer(output)
+    
+    # Write header
+    writer.writerow(columns)
+    
+    # Write data
+    writer.writerows(data)
+    
+    # Convert to bytes
+    output.seek(0)
+    output_bytes = BytesIO(output.getvalue().encode('utf-8-sig'))  # UTF-8 with BOM for Excel compatibility
+    
+    # Generate filename with timestamp
+    timestamp = datetime.now(ZoneInfo("Europe/Berlin")).strftime('%Y%m%d_%H%M%S')
+    filename = f"{filename_prefix}_{timestamp}.csv"
+    
+    return send_file(
+        output_bytes,
+        mimetype='text/csv',
+        as_attachment=True,
+        download_name=filename
+    )
+
+
 def format_datetime_for_export(dt):
     """Format datetime for export"""
     if dt:
@@ -43,6 +72,9 @@ def format_datetime_for_export(dt):
                 dt = datetime.fromisoformat(dt)
             except:
                 return dt
+        # Remove timezone info for Excel compatibility
+        if hasattr(dt, 'replace') and dt.tzinfo is not None:
+            dt = dt.replace(tzinfo=None)
         return dt.strftime('%Y-%m-%d %H:%M:%S')
     return ''