"""Designer session tools."""
from typing import Any, cast
from fastmcp import Context, FastMCP
from ..ignition_client import IgnitionClient
def _client(ctx: Context) -> IgnitionClient:
if ctx.request_context is None:
raise RuntimeError("Tool called outside of a request context")
return cast(IgnitionClient, ctx.request_context.lifespan_context["client"])
async def list_designers(ctx: Context) -> Any:
"""List active Ignition Designer sessions.
Shows who is connected to the Designer, which project they have open, and
since when. Useful to check if anyone is actively editing before making
programmatic changes to a project.
"""
try:
return await _client(ctx).list_designers()
except Exception as exc:
return {"error": f"Failed to list designers: {exc}"}
def register(mcp: FastMCP) -> None:
"""Register all designer tools with the FastMCP instance."""
mcp.tool()(list_designers)
