Feat: Improve CSV preview to show first 5 lines

app.py

@@ -205,12 +205,26 @@ def process_input_updated(url_or_id, source_type, depth, output_format_selection
         preview_content = raw_content # Default to markdown
         if output_format_selection == "JSON":
             preview_content = convert_to_json(raw_content, url_or_id)
-        elif output_format_selection == "CSV":
-            # For CSV preview, maybe just show a message or first few lines
-            preview_content = f"CSV file generated. Path: {output_file_path}\nFirst few lines might be shown here in a real app."
-            # Or read a bit of the CSV for preview:
-            # with open(output_file_path, 'r', encoding='utf-8') as f_csv:
-            # preview_content = "".join(f_csv.readlines()[:5])
+        elif output_format_selection == "CSV" and output_file_path:
+            try:
+                with open(output_file_path, 'r', encoding='utf-8') as f_csv:
+                    # Read the first 5 lines for preview
+                    csv_preview_lines = [next(f_csv) for _ in range(5)]
+                preview_content = "".join(csv_preview_lines)
+                if not preview_content: # Handle empty or very short CSV
+                    preview_content = "[CSV content is empty or very short]"
+            except StopIteration: # Handle files with less than 5 lines
+                 # If StopIteration occurs, it means we've read all lines.
+                 # We need to re-open and read all lines if it was less than 5.
+                with open(output_file_path, 'r', encoding='utf-8') as f_csv:
+                    preview_content = f_csv.read()
+                if not preview_content:
+                    preview_content = "[CSV content is empty]"
+            except Exception as e_csv_preview:
+                preview_content = f"[Error reading CSV for preview: {str(e_csv_preview)}]"
+        elif output_format_selection == "CSV" and not output_file_path:
+             preview_content = "[CSV file path not available for preview]"
+
 
         progress(1, desc="Processing complete.")
         return f"Successfully processed: {url_or_id}", preview_content, output_file_path