# chuk-motion/src/chuk_motion/components/charts/DonutChart/tool.py
"""DonutChart MCP tool."""
import asyncio
import json
from chuk_motion.models import ChartComponentResponse, ErrorResponse
def register_tool(mcp, project_manager):
"""Register the DonutChart tool with the MCP server."""
@mcp.tool
async def remotion_add_donut_chart(
data: str,
title: str | None = None,
duration: float = 4.0,
) -> str:
"""
Add an animated donut chart to the composition.
Animated donut chart for showing proportions with a center hole.
Args:
data: JSON array of {label, value} objects. Optionally include "color" per slice.
Format: [{"label": "Free", "value": 55}, {"label": "Pro", "value": 30}]
title: Optional chart title
duration: How long to animate in seconds (default: 4.0)
Returns:
JSON with component info
Example:
await remotion_add_donut_chart(
data='[{"label": "Free", "value": 55}, {"label": "Pro", "value": 30}, {"label": "Enterprise", "value": 15}]',
title="Plan Distribution",
duration=4.0
)
"""
def _add():
builder = project_manager.current_timeline
if not builder:
return ErrorResponse(
error="No active project. Create a project first."
).model_dump_json()
try:
data_parsed = json.loads(data)
except json.JSONDecodeError as e:
return ErrorResponse(error=f"Invalid data JSON: {str(e)}").model_dump_json()
try:
start_time = builder.get_total_duration_seconds()
builder.add_donut_chart(
data=data_parsed,
title=title,
start_time=start_time,
duration=duration,
)
return ChartComponentResponse(
component="DonutChart",
data_points=len(data_parsed),
title=title,
start_time=start_time,
duration=duration,
).model_dump_json()
except Exception as e:
return ErrorResponse(error=str(e)).model_dump_json()
return await asyncio.get_event_loop().run_in_executor(None, _add)
