Pranjal Joshi
107 lines
4.0 KiB
Python
107 lines
4.0 KiB
Python
import uuid
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from datetime import datetime, timezone
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from typing import Any
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from fastapi import APIRouter, Depends, Query
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.api.deps import get_current_user
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from app.db.database import get_db
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from app.db.models import CanvasState, Design, Edge, Node
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from app.schemas.canvas import CanvasSaveRequest, CanvasStateResponse
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from app.schemas.edges import EdgeResponse
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from app.schemas.nodes import NodeResponse
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router = APIRouter()
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@router.get("", response_model=CanvasStateResponse)
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async def load_canvas(
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design_id: str | None = Query(None, description="Design ID to load; uses first design if omitted"),
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db: AsyncSession = Depends(get_db),
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_: str = Depends(get_current_user),
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) -> CanvasStateResponse:
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if design_id is None:
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first = (await db.execute(select(Design).order_by(Design.created_at).limit(1))).scalar()
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design_id = first.id if first else None
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if design_id is None:
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return CanvasStateResponse(nodes=[], edges=[], viewport={"x": 0, "y": 0, "zoom": 1}, custom_style=None)
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nodes = (await db.execute(select(Node).where(Node.design_id == design_id))).scalars().all()
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edges = (await db.execute(select(Edge).where(Edge.design_id == design_id))).scalars().all()
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state = await db.get(CanvasState, design_id)
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viewport: dict[str, Any] = state.viewport if state else {"x": 0, "y": 0, "zoom": 1}
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return CanvasStateResponse(
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nodes=[NodeResponse.model_validate(n) for n in nodes],
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edges=[EdgeResponse.model_validate(e) for e in edges],
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viewport=viewport,
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custom_style=state.custom_style if state else None,
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)
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@router.post("/save")
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async def save_canvas(
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body: CanvasSaveRequest, db: AsyncSession = Depends(get_db), _: str = Depends(get_current_user)
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) -> dict[str, bool | str]:
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design_id = body.design_id
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if design_id is None:
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first = (await db.execute(select(Design).order_by(Design.created_at).limit(1))).scalar()
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design_id = first.id if first else None
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if design_id is None:
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new_design = Design(id=str(uuid.uuid4()), name="Network Topology", design_type="network")
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db.add(new_design)
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await db.flush()
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design_id = new_design.id
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incoming_node_ids = {n.id for n in body.nodes}
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incoming_edge_ids = {e.id for e in body.edges}
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# Delete nodes removed from canvas (only within this design)
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existing_nodes = (await db.execute(select(Node).where(Node.design_id == design_id))).scalars().all()
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for node in existing_nodes:
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if node.id not in incoming_node_ids:
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await db.delete(node)
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# Delete edges removed from canvas (only within this design)
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existing_edges = (await db.execute(select(Edge).where(Edge.design_id == design_id))).scalars().all()
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for edge in existing_edges:
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if edge.id not in incoming_edge_ids:
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await db.delete(edge)
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await db.flush()
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# Upsert nodes
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for node_data in body.nodes:
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db_node = await db.get(Node, node_data.id)
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payload = node_data.model_dump()
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payload["design_id"] = design_id
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if db_node:
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for field, value in payload.items():
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setattr(db_node, field, value)
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else:
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db.add(Node(**payload))
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# Upsert edges
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for edge_data in body.edges:
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db_edge = await db.get(Edge, edge_data.id)
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payload = edge_data.model_dump()
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payload["design_id"] = design_id
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if db_edge:
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for field, value in payload.items():
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setattr(db_edge, field, value)
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else:
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db.add(Edge(**payload))
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# Upsert viewport + custom style
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state = await db.get(CanvasState, design_id)
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if state:
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state.viewport = body.viewport
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state.custom_style = body.custom_style
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state.saved_at = datetime.now(timezone.utc)
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else:
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db.add(CanvasState(design_id=design_id, viewport=body.viewport, custom_style=body.custom_style))
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await db.commit()
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return {"saved": True}
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