# chuk-motion/src/chuk_motion/components/layouts/StackedReaction/tool.py
"""StackedReaction MCP tool."""
import asyncio
import json
from chuk_motion.components.component_helpers import parse_nested_component
from chuk_motion.models import ErrorResponse, LayoutComponentResponse
def register_tool(mcp, project_manager):
"""Register the StackedReaction tool with the MCP server."""
@mcp.tool
async def remotion_add_stacked_reaction(
original_content: str | None = None,
reaction_content: str | None = None,
layout: str = "vertical",
reaction_size: float = 40,
gap: float = 20,
padding: float = 40,
duration: float | str = 5.0,
) -> str:
"""
Add StackedReaction layout to the composition.
Reaction video style with stacked feeds
Args:
original_content: JSON component for original video. Format: {"type": "ComponentName", "config": {...}}
reaction_content: JSON component for reaction video. Same format as original_content
layout: Layout style (vertical, horizontal, pip)
reaction_size: Reaction panel size (percentage)
gap: Gap between panels
padding: Padding from edges
duration: Duration in seconds
Returns:
JSON with component info
"""
def _add():
if not project_manager.current_timeline:
return ErrorResponse(
error="No active project. Create a project first."
).model_dump_json()
try:
original_parsed = json.loads(original_content) if original_content else None
reaction_parsed = json.loads(reaction_content) if reaction_content else None
except json.JSONDecodeError as e:
return ErrorResponse(error=f"Invalid component JSON: {str(e)}").model_dump_json()
try:
# Convert nested components to ComponentInstance objects
original_component = parse_nested_component(original_parsed)
reaction_component = parse_nested_component(reaction_parsed)
# Get builder and start time
builder = project_manager.current_timeline
start_time = builder.get_total_duration_seconds()
# Add component using builder
builder.add_stacked_reaction(
start_time=start_time,
original_content=original_component,
reaction_content=reaction_component,
layout=layout,
reaction_size=reaction_size,
gap=gap,
padding=padding,
duration=duration,
)
return LayoutComponentResponse(
component="StackedReaction",
layout=layout,
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)
