Change log format from text to CSV table format - easier to read and analyze

label_printer_gui.py

@@ -106,8 +106,8 @@ class LabelPrinterApp(App):
             for filename in os.listdir(logs_dir):
                 file_path = os.path.join(logs_dir, filename)
                 
-                # Only process log files
-                if not filename.endswith('.log'):
+                # Process both .log and .csv files
+                if not (filename.endswith('.log') or filename.endswith('.csv')):
                     continue
                 
                 # Check if file is older than cutoff
@@ -124,7 +124,7 @@ class LabelPrinterApp(App):
     
     def log_print_action(self, sap_nr, quantity, cable_id, printer, pdf_filename, success):
         """
-        Log the print action to a log file.
+        Log the print action to a CSV log file (table format).
         
         Args:
             sap_nr (str): SAP article number
@@ -142,25 +142,40 @@ class LabelPrinterApp(App):
         try:
             # Create log filename with date
             log_date = datetime.datetime.now().strftime("%Y%m%d")
-            log_filename = os.path.join(logs_dir, f"print_log_{log_date}.log")
+            log_filename = os.path.join(logs_dir, f"print_log_{log_date}.csv")
             
-            # Create log entry
+            # Create log entry values
             timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
             status = "SUCCESS" if success else "FAILED"
             
-            log_entry = (
-                f"[{timestamp}] {status}\n"
-                f"  SAP-Nr: {sap_nr}\n"
-                f"  Quantity: {quantity}\n"
-                f"  Cable ID: {cable_id}\n"
-                f"  Printer: {printer}\n"
-                f"  PDF File: {pdf_filename}\n"
-                f"  ---\n"
+            # Escape CSV values (handle commas and quotes)
+            def escape_csv(value):
+                """Escape CSV special characters"""
+                value = str(value)
+                if ',' in value or '"' in value or '\n' in value:
+                    value = '"' + value.replace('"', '""') + '"'
+                return value
+            
+            # Create CSV line
+            log_line = (
+                f"{timestamp},{status},"
+                f"{escape_csv(sap_nr)},"
+                f"{escape_csv(quantity)},"
+                f"{escape_csv(cable_id)},"
+                f"{escape_csv(printer)},"
+                f"{escape_csv(pdf_filename)}\n"
             )
             
-            # Append to log file
+            # Check if file exists to add header on first entry
+            file_exists = os.path.isfile(log_filename)
+            
+            # Write to log file
             with open(log_filename, 'a', encoding='utf-8') as f:
-                f.write(log_entry)
+                # Add header if file is new
+                if not file_exists:
+                    f.write("Timestamp,Status,SAP-Nr,Quantity,Cable ID,Printer,PDF File\n")
+                # Append log entry
+                f.write(log_line)
             
             print(f"Log entry saved to: {log_filename}")
         except Exception as e: