"Standard data content block" can include old-style LangChain v0 blocks
(URLContentBlock, Base64ContentBlock, IDContentBlock) or new ones.
"""
if block["type"] == "image":
 chat_completions_block = convert_to_openai_image_block(block)
 if api == "responses":
 formatted_block = {
 "type": "input_image",
 "image_url": chat_completions_block["image_url"]["url"],
 }
 if chat_completions_block["image_url"].get("detail"):
 formatted_block["detail"] = chat_completions_block["image_url"][
 "detail"
 ]
 else:
 formatted_block = chat_completions_block
elif block["type"] == "file":
 if block.get("source_type") == "base64" or "base64" in block:
 # Handle v0 format (Base64CB): {"source_type": "base64", "data": "...", ...}
 # Handle v1 format (IDCB): {"base64": "...", ...}
 base64_data = block["data"] if "source_type" in block else block["base64"]
 file = {"file_data": f"data:{block['mime_type']};base64,{base64_data}"}
 if filename := block.get("filename"):
 file["filename"] = filename
 elif (extras := block.get("extras")) and ("filename" in extras):
 file["filename"] = extras["filename"]
 elif (extras := block.get("metadata")) and ("filename" in extras):
 # Backward compat
 file["filename"] = extras["filename"]
 else:
 # Can't infer filename
 warnings.warn(
 "OpenAI may require a filename for file uploads. Specify a filename"
 " in the content block, e.g.: {'type': 'file', 'mime_type': "
 "'...', 'base64': '...', 'filename': 'my-file.pdf'}",
 stacklevel=1,
 )
 formatted_block = {"type": "file", "file": file}
 if api == "responses":
 formatted_block = {"type": "input_file", **formatted_block["file"]}
 elif block.get("source_type") == "id" or "file_id" in block:
 # Handle v0 format (IDContentBlock): {"source_type": "id", "id": "...", ...}
 # Handle v1 format (IDCB): {"file_id": "...", ...}
 file_id = block["id"] if "source_type" in block else block["file_id"]
 formatted_block = {"type": "file", "file": {"file_id": file_id}}
 if api == "responses":
 formatted_block = {"type": "input_file", **formatted_block["file"]}
 elif "url" in block: # Intentionally do not check for source_type="url"
 if api == "chat/completions":
 error_msg = "OpenAI Chat Completions does not support file URLs."
 raise ValueError(error_msg)
 # Only supported by Responses API; return in that format
 formatted_block = {"type": "input_file", "file_url": block["url"]}
 else:
 error_msg = "Keys base64, url, or file_id required for file blocks."
 raise ValueError(error_msg)
elif block["type"] == "audio":
 if "base64" in block or block.get("source_type") == "base64":
 # Handle v0 format: {"source_type": "base64", "data": "...", ...}
 # Handle v1 format: {"base64": "...", ...}
 base64_data = block["data"] if "source_type" in block else block["base64"]
 audio_format = block["mime_type"].split("/")[-1]
 formatted_block = {
 "type": "input_audio",
 "input_audio": {"data": base64_data, "format": audio_format},
 }
 else:
 error_msg = "Key base64 is required for audio blocks."
 raise ValueError(error_msg)
elif block["type"] == "video":
 .....
else:
 error_msg = f"Block of type {block['type']} is not supported."
 raise ValueError(error_msg)
return formatted_block