tool

@define(kw_only=True)
class RagTool(BaseTool):
    """Tool for querying a RAG engine.

    Attributes:
        description: LLM-friendly RAG engine description.
        rag_engine: `RagEngine`.
    """

    description: str = field()
    rag_engine: RagEngine = field()

    @activity(
        config={
            "description": "{{ _self.description }}",
            "schema": Schema({Literal("query", description="A natural language search query"): str}),
        },
    )
    def search(self, params: dict) -> ListArtifact | ErrorArtifact:
        query = params["values"]["query"]

        try:
            artifacts = self.rag_engine.process_query(query).outputs

            outputs = []
            for artifact in artifacts:
                if isinstance(artifact, ListArtifact):
                    outputs.extend(artifact.value)
                else:
                    outputs.append(artifact)

            if len(outputs) > 0:
                return ListArtifact(outputs)
            return ErrorArtifact("query output is empty")

        except Exception as e:
            return ErrorArtifact(f"error querying: {e}")

@activity(
    config={
        "description": "{{ _self.description }}",
        "schema": Schema({Literal("query", description="A natural language search query"): str}),
    },
)
def search(self, params: dict) -> ListArtifact | ErrorArtifact:
    query = params["values"]["query"]

    try:
        artifacts = self.rag_engine.process_query(query).outputs

        outputs = []
        for artifact in artifacts:
            if isinstance(artifact, ListArtifact):
                outputs.extend(artifact.value)
            else:
                outputs.append(artifact)

        if len(outputs) > 0:
            return ListArtifact(outputs)
        return ErrorArtifact("query output is empty")

    except Exception as e:
        return ErrorArtifact(f"error querying: {e}")