Update app.py

app.py

@@ -67,9 +67,26 @@ def empty_output_folder(output_dir):
 
 # Function to create a temporary file with string content
 def create_temp_file(content, suffix=".txt"):
+    content = content.strip()
+
+    # Case 1: If there's no block marker `[]`, treat it as a single-line input
+    if not re.search(r"\[\w+\]", content):
+        formatted_content = " ".join(content.split())  # Normalize spaces to one space
+    else:
+        # Split content into blocks using headers (e.g., [verse], [chorus])
+        blocks = re.split(r"(?=\[\w+\])", content)  # Keeps headers in the split parts
+
+        # Remove excess newlines within each block
+        cleaned_blocks = [block.strip() for block in blocks if block.strip()]
+
+        # Ensure exactly two newlines between blocks
+        formatted_content = "\n\n".join(cleaned_blocks)
+
+    # Write to temp file
     fd, path = tempfile.mkstemp(suffix=suffix)
     with os.fdopen(fd, "w", encoding="utf-8") as f:
-        f.write(content)
+        f.write(formatted_content)
+    
     return path
 
 def get_last_mp3_file(output_dir):