Pouzor
6ae7f7768f
datetime.UTC was introduced in Python 3.11. Users on 3.10 get an ImportError. Also lower ruff/mypy target-version from py313 to py310 to match minimum supported version.
80 lines
2.7 KiB
Python
80 lines
2.7 KiB
Python
from datetime import datetime, timezone
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from typing import Any
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from fastapi import APIRouter, Depends
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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, 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(db: AsyncSession = Depends(get_db), _: str = Depends(get_current_user)) -> CanvasStateResponse:
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nodes = (await db.execute(select(Node))).scalars().all()
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edges = (await db.execute(select(Edge))).scalars().all()
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state = await db.get(CanvasState, 1)
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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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)
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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]:
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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
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existing_nodes = (await db.execute(select(Node))).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
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existing_edges = (await db.execute(select(Edge))).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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if db_node:
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for field, value in node_data.model_dump().items():
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setattr(db_node, field, value)
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else:
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db.add(Node(**node_data.model_dump()))
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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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if db_edge:
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for field, value in edge_data.model_dump().items():
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setattr(db_edge, field, value)
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else:
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db.add(Edge(**edge_data.model_dump()))
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# Upsert viewport
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state = await db.get(CanvasState, 1)
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if state:
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state.viewport = body.viewport
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state.saved_at = datetime.now(timezone.utc)
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else:
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db.add(CanvasState(id=1, viewport=body.viewport))
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await db.commit()
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return {"saved": True}
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