fix: Look through all streaming chunks for tools calls

[vblagoje]

Why:

Enhances the processing logic to support various LLM platforms—not just OpenAI. Testing with the OpenAI Python package using the Mistral platform revealed that some platforms may place tool_calls in any streamed chunk (not only in the first). This change ensures that all chunks are scanned for the tool_calls payload.

What:

• Refined detection of tool calls across all streaming chunks.
• Changed the assumption that tool_calls appear only in the first chunk to a search that finds them anywhere.

How can it be used:

This update ensures robust tool call tracking in streaming messages, accurately constructing payloads regardless of where the tool_calls appear:

# Updated logic to search for tool_calls in all chunks
tool_call_index = next((i for i, chunk in enumerate(chunks) if chunk.meta.get("tool_calls")), None)
tools_len = len(chunks[tool_call_index].meta.get("tool_calls", []))

How did you test it:

• No tests were added, using old tests

Notes for the reviewer:

N/A

[coveralls]

Pull Request Test Coverage Report for Build 13202693684

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 92.712%

---

Files with Coverage Reduction	New Missed Lines	%
components/generators/chat/openai.py	2	96.4%

Totals
Change from base Build 13200853936:	0.003%
Covered Lines:	9057
Relevant Lines:	9769

---

💛 - Coveralls

[davidsbatista]

Suggested change

	Improved openai streaming response tool call processing: The logic now scans all chunks to correctly identify the first chunk with tool calls, ensuring accurate payload construction and preventing errors when tool call data isn’t confined to the initial chunk.
	Improved `OpenAIChatGenerator` streaming response tool call processing: The logic now scans all chunks to correctly identify the first chunk with tool calls, ensuring accurate payload construction and preventing errors when tool call data isn’t confined to the initial chunk.

[davidsbatista]

LGTM