Files
lemonspace_app/components/canvas/canvas.tsx
Matthias e96c9c611c feat: implement batch node removal and enhance canvas node management
- Replaced individual node removal with a batch removal mutation to improve performance and user experience.
- Introduced optimistic UI updates to prevent flickering during node deletions.
- Enhanced edge reconnection logic to automatically handle edges associated with deleted nodes.
- Updated asset and image node components to support new metrics tracking for better diagnostics.
- Refactored node resizing logic to ensure consistent behavior during drag-and-drop operations.
2026-03-27 22:08:16 +01:00

937 lines
29 KiB
TypeScript

"use client";
import { useCallback, useEffect, useRef, useState } from "react";
import { useTheme } from "next-themes";
import {
ReactFlow,
ReactFlowProvider,
Background,
Controls,
MiniMap,
applyNodeChanges,
applyEdgeChanges,
useReactFlow,
useStoreApi,
reconnectEdge,
type Node as RFNode,
type Edge as RFEdge,
type NodeChange,
type EdgeChange,
type Connection,
type DefaultEdgeOptions,
BackgroundVariant,
} from "@xyflow/react";
import "@xyflow/react/dist/style.css";
import { toast } from "@/lib/toast";
import { msg } from "@/lib/toast-messages";
import { useConvexAuth, useMutation, useQuery } from "convex/react";
import { api } from "@/convex/_generated/api";
import type { Id } from "@/convex/_generated/dataModel";
import { authClient } from "@/lib/auth-client";
import { nodeTypes } from "./node-types";
import {
convexNodeToRF,
convexEdgeToRF,
NODE_DEFAULTS,
NODE_HANDLE_MAP,
} from "@/lib/canvas-utils";
import CanvasToolbar from "@/components/canvas/canvas-toolbar";
import { CanvasPlacementProvider } from "@/components/canvas/canvas-placement-context";
interface CanvasInnerProps {
canvasId: Id<"canvases">;
}
function withResolvedCompareData(nodes: RFNode[], edges: RFEdge[]): RFNode[] {
const persistedEdges = edges.filter((edge) => edge.className !== "temp");
let hasNodeUpdates = false;
const nextNodes = nodes.map((node) => {
if (node.type !== "compare") return node;
const incoming = persistedEdges.filter((edge) => edge.target === node.id);
let leftUrl: string | undefined;
let rightUrl: string | undefined;
let leftLabel: string | undefined;
let rightLabel: string | undefined;
for (const edge of incoming) {
const source = nodes.find((candidate) => candidate.id === edge.source);
if (!source) continue;
const srcData = source.data as { url?: string; label?: string };
if (edge.targetHandle === "left") {
leftUrl = srcData.url;
leftLabel = srcData.label ?? source.type ?? "Before";
} else if (edge.targetHandle === "right") {
rightUrl = srcData.url;
rightLabel = srcData.label ?? source.type ?? "After";
}
}
const current = node.data as {
leftUrl?: string;
rightUrl?: string;
leftLabel?: string;
rightLabel?: string;
};
if (
current.leftUrl === leftUrl &&
current.rightUrl === rightUrl &&
current.leftLabel === leftLabel &&
current.rightLabel === rightLabel
) {
return node;
}
hasNodeUpdates = true;
return {
...node,
data: { ...node.data, leftUrl, rightUrl, leftLabel, rightLabel },
};
});
return hasNodeUpdates ? nextNodes : nodes;
}
function getMiniMapNodeColor(node: RFNode): string {
return node.type === "frame" ? "transparent" : "#6366f1";
}
function getMiniMapNodeStrokeColor(node: RFNode): string {
return node.type === "frame" ? "transparent" : "#4f46e5";
}
const DEFAULT_EDGE_OPTIONS: DefaultEdgeOptions = {
interactionWidth: 75,
};
const EDGE_INTERSECTION_HIGHLIGHT_STYLE: NonNullable<RFEdge["style"]> = {
stroke: "hsl(var(--foreground))",
strokeWidth: 2,
};
const GENERATION_FAILURE_WINDOW_MS = 5 * 60 * 1000;
const GENERATION_FAILURE_THRESHOLD = 3;
function getEdgeIdFromInteractionElement(element: Element): string | null {
const edgeContainer = element.closest(".react-flow__edge");
if (!edgeContainer) return null;
const dataId = edgeContainer.getAttribute("data-id");
if (dataId) return dataId;
const domId = edgeContainer.getAttribute("id");
if (domId?.startsWith("reactflow__edge-")) {
return domId.slice("reactflow__edge-".length);
}
return null;
}
function getNodeCenterClientPosition(nodeId: string): { x: number; y: number } | null {
const nodeElement = Array.from(
document.querySelectorAll<HTMLElement>(".react-flow__node"),
).find((element) => element.dataset.id === nodeId);
if (!nodeElement) return null;
const rect = nodeElement.getBoundingClientRect();
return {
x: rect.left + rect.width / 2,
y: rect.top + rect.height / 2,
};
}
function getIntersectedEdgeId(point: { x: number; y: number }): string | null {
const interactionElement = document
.elementsFromPoint(point.x, point.y)
.find((element) => element.classList.contains("react-flow__edge-interaction"));
if (!interactionElement) {
return null;
}
return getEdgeIdFromInteractionElement(interactionElement);
}
function hasHandleKey(
handles: { source?: string; target?: string } | undefined,
key: "source" | "target",
): boolean {
if (!handles) return false;
return Object.prototype.hasOwnProperty.call(handles, key);
}
function normalizeHandle(handle: string | null | undefined): string | undefined {
return handle ?? undefined;
}
function shallowEqualRecord(
a: Record<string, unknown>,
b: Record<string, unknown>,
): boolean {
const aKeys = Object.keys(a);
const bKeys = Object.keys(b);
if (aKeys.length !== bKeys.length) return false;
for (const key of aKeys) {
if (a[key] !== b[key]) return false;
}
return true;
}
function mergeNodesPreservingLocalState(
previousNodes: RFNode[],
incomingNodes: RFNode[],
): RFNode[] {
const previousById = new Map(previousNodes.map((node) => [node.id, node]));
return incomingNodes.map((incomingNode) => {
const previousNode = previousById.get(incomingNode.id);
if (!previousNode) {
return incomingNode;
}
const previousData = previousNode.data as Record<string, unknown>;
const incomingData = incomingNode.data as Record<string, unknown>;
const previousWidth = previousNode.style?.width;
const previousHeight = previousNode.style?.height;
const incomingWidth = incomingNode.style?.width;
const incomingHeight = incomingNode.style?.height;
const isStructurallyEqual =
previousNode.type === incomingNode.type &&
previousNode.parentId === incomingNode.parentId &&
previousNode.zIndex === incomingNode.zIndex &&
previousNode.position.x === incomingNode.position.x &&
previousNode.position.y === incomingNode.position.y &&
previousWidth === incomingWidth &&
previousHeight === incomingHeight &&
shallowEqualRecord(previousData, incomingData);
if (isStructurallyEqual) {
return previousNode;
}
return {
...previousNode,
...incomingNode,
selected: previousNode.selected,
dragging: previousNode.dragging,
};
});
}
function CanvasInner({ canvasId }: CanvasInnerProps) {
const { screenToFlowPosition } = useReactFlow();
const storeApi = useStoreApi();
const { resolvedTheme } = useTheme();
const { data: session, isPending: isSessionPending } = authClient.useSession();
const { isLoading: isAuthLoading, isAuthenticated } = useConvexAuth();
const shouldSkipCanvasQueries =
isSessionPending || isAuthLoading || !isAuthenticated;
const convexAuthUserProbe = useQuery(
api.auth.safeGetAuthUser,
shouldSkipCanvasQueries ? "skip" : {},
);
useEffect(() => {
if (process.env.NODE_ENV === "production") return;
if (!isAuthLoading && !isAuthenticated) {
console.warn("[Canvas debug] mounted without Convex auth", { canvasId });
}
}, [canvasId, isAuthLoading, isAuthenticated]);
useEffect(() => {
if (process.env.NODE_ENV === "production") return;
if (isAuthLoading || isSessionPending) return;
console.info("[Canvas auth state]", {
canvasId,
convex: {
isAuthenticated,
shouldSkipCanvasQueries,
probeUserId: convexAuthUserProbe?.userId ?? null,
probeRecordId: convexAuthUserProbe?._id ?? null,
},
session: {
hasUser: Boolean(session?.user),
email: session?.user?.email ?? null,
},
});
}, [
canvasId,
convexAuthUserProbe?._id,
convexAuthUserProbe?.userId,
isAuthLoading,
isAuthenticated,
isSessionPending,
session?.user,
shouldSkipCanvasQueries,
]);
// ─── Convex Realtime Queries ───────────────────────────────────
const convexNodes = useQuery(
api.nodes.list,
shouldSkipCanvasQueries ? "skip" : { canvasId },
);
const convexEdges = useQuery(
api.edges.list,
shouldSkipCanvasQueries ? "skip" : { canvasId },
);
const canvas = useQuery(
api.canvases.get,
shouldSkipCanvasQueries ? "skip" : { canvasId },
);
// ─── Convex Mutations (exakte Signaturen aus nodes.ts / edges.ts) ──
const moveNode = useMutation(api.nodes.move);
const resizeNode = useMutation(api.nodes.resize);
const batchMoveNodes = useMutation(api.nodes.batchMove);
const createNode = useMutation(api.nodes.create);
const batchRemoveNodes = useMutation(api.nodes.batchRemove);
const createEdge = useMutation(api.edges.create);
const removeEdge = useMutation(api.edges.remove);
// ─── Lokaler State (für flüssiges Dragging) ───────────────────
const [nodes, setNodes] = useState<RFNode[]>([]);
const [edges, setEdges] = useState<RFEdge[]>([]);
// Drag-Lock: während des Drags kein Convex-Override
const isDragging = useRef(false);
// Delete-Lock: Nodes die gerade gelöscht werden, nicht aus Convex-Sync wiederherstellen
const deletingNodeIds = useRef<Set<string>>(new Set());
// Delete Edge on Drop
const edgeReconnectSuccessful = useRef(true);
const overlappedEdgeRef = useRef<string | null>(null);
const highlightedEdgeRef = useRef<string | null>(null);
const highlightedEdgeOriginalStyleRef = useRef<RFEdge["style"] | undefined>(
undefined,
);
const recentGenerationFailureTimestampsRef = useRef<number[]>([]);
const previousNodeStatusRef = useRef<Map<string, string | undefined>>(new Map());
const hasInitializedGenerationFailureTrackingRef = useRef(false);
useEffect(() => {
if (!convexNodes) return;
const nextNodeStatusMap = new Map<string, string | undefined>();
let detectedGenerationFailures = 0;
for (const node of convexNodes) {
nextNodeStatusMap.set(node._id, node.status);
if (node.type !== "ai-image") {
continue;
}
const previousStatus = previousNodeStatusRef.current.get(node._id);
if (
hasInitializedGenerationFailureTrackingRef.current &&
node.status === "error" &&
previousStatus !== "error"
) {
detectedGenerationFailures += 1;
}
}
previousNodeStatusRef.current = nextNodeStatusMap;
if (!hasInitializedGenerationFailureTrackingRef.current) {
hasInitializedGenerationFailureTrackingRef.current = true;
return;
}
if (detectedGenerationFailures === 0) {
return;
}
const now = Date.now();
const recentFailures = recentGenerationFailureTimestampsRef.current.filter(
(timestamp) => now - timestamp <= GENERATION_FAILURE_WINDOW_MS,
);
for (let index = 0; index < detectedGenerationFailures; index += 1) {
recentFailures.push(now);
}
if (recentFailures.length >= GENERATION_FAILURE_THRESHOLD) {
toast.warning(
msg.ai.openrouterIssues.title,
msg.ai.openrouterIssues.desc,
);
recentGenerationFailureTimestampsRef.current = [];
return;
}
recentGenerationFailureTimestampsRef.current = recentFailures;
}, [convexNodes]);
// ─── Convex → Lokaler State Sync ──────────────────────────────
useEffect(() => {
if (!convexNodes || isDragging.current) return;
setNodes((previousNodes) => {
const incomingNodes = withResolvedCompareData(convexNodes.map(convexNodeToRF), edges);
// Nodes, die gerade optimistisch gelöscht werden, nicht wiederherstellen
const filteredIncoming = deletingNodeIds.current.size > 0
? incomingNodes.filter((node) => !deletingNodeIds.current.has(node.id))
: incomingNodes;
return mergeNodesPreservingLocalState(previousNodes, filteredIncoming);
});
}, [convexNodes, edges]);
useEffect(() => {
if (!convexEdges) return;
setEdges((prev) => {
const tempEdges = prev.filter((e) => e.className === "temp");
const mapped = convexEdges.map(convexEdgeToRF);
// #region agent log
fetch('http://127.0.0.1:7733/ingest/db1ec129-24cb-483b-98e2-3e7beef6d9cd',{method:'POST',headers:{'Content-Type':'application/json','X-Debug-Session-Id':'594b9f'},body:JSON.stringify({sessionId:'594b9f',runId:'run1',hypothesisId:'H1-H2',location:'canvas.tsx:edgeSyncEffect',message:'edges passed to ReactFlow',data:{edgeCount:mapped.length,edges:mapped.map(e=>({id:e.id,source:e.source,target:e.target,sourceHandle:e.sourceHandle,targetHandle:e.targetHandle,typeofTH:typeof e.targetHandle,isNullTH:e.targetHandle===null}))},timestamp:Date.now()})}).catch(()=>{});
// #endregion
return [...mapped, ...tempEdges];
});
}, [convexEdges]);
useEffect(() => {
if (isDragging.current) return;
setNodes((nds) => withResolvedCompareData(nds, edges));
}, [edges]);
// ─── Node Changes (Drag, Select, Remove) ─────────────────────
const onNodesChange = useCallback(
(changes: NodeChange[]) => {
const removedIds = new Set<string>();
for (const c of changes) {
if (c.type === "remove") {
removedIds.add(c.id);
}
}
setNodes((nds) => {
const nextNodes = applyNodeChanges(changes, nds);
for (const change of changes) {
if (change.type !== "dimensions") continue;
if (change.resizing !== false || !change.dimensions) continue;
if (removedIds.has(change.id)) continue;
void resizeNode({
nodeId: change.id as Id<"nodes">,
width: change.dimensions.width,
height: change.dimensions.height,
}).catch((error: unknown) => {
if (process.env.NODE_ENV !== "production") {
console.warn("[Canvas] resizeNode failed", error);
}
});
}
return nextNodes;
});
},
[resizeNode],
);
const onEdgesChange = useCallback((changes: EdgeChange[]) => {
setEdges((eds) => applyEdgeChanges(changes, eds));
}, []);
const onFlowError = useCallback(
(code: string, message: string) => {
if (process.env.NODE_ENV === "production") return;
if (code !== "015") {
console.error("[ReactFlow error]", { canvasId, code, message });
return;
}
const state = storeApi.getState() as {
nodeLookup?: Map<
string,
{
id: string;
selected?: boolean;
type?: string;
measured?: { width?: number; height?: number };
internals?: { positionAbsolute?: { x: number; y: number } };
}
>;
};
const uninitializedNodes = Array.from(state.nodeLookup?.values() ?? [])
.filter(
(node) =>
node.measured?.width === undefined ||
node.measured?.height === undefined,
)
.map((node) => ({
id: node.id,
type: node.type ?? null,
selected: Boolean(node.selected),
measuredWidth: node.measured?.width,
measuredHeight: node.measured?.height,
positionAbsolute: node.internals?.positionAbsolute ?? null,
}));
console.error("[ReactFlow error 015 diagnostics]", {
canvasId,
message,
localNodeCount: nodes.length,
localSelectedNodeIds: nodes.filter((n) => n.selected).map((n) => n.id),
isDragging: isDragging.current,
uninitializedNodeCount: uninitializedNodes.length,
uninitializedNodes,
});
},
[canvasId, nodes, storeApi],
);
// ─── Delete Edge on Drop ──────────────────────────────────────
const onReconnectStart = useCallback(() => {
edgeReconnectSuccessful.current = false;
}, []);
const onReconnect = useCallback(
(oldEdge: RFEdge, newConnection: Connection) => {
edgeReconnectSuccessful.current = true;
setEdges((els) => reconnectEdge(oldEdge, newConnection, els));
},
[],
);
const onReconnectEnd = useCallback(
(_: MouseEvent | TouchEvent, edge: RFEdge) => {
if (!edgeReconnectSuccessful.current) {
setEdges((eds) => eds.filter((e) => e.id !== edge.id));
if (edge.className === "temp") {
edgeReconnectSuccessful.current = true;
return;
}
void removeEdge({ edgeId: edge.id as Id<"edges"> }).catch((error) => {
console.error("[Canvas edge remove failed] reconnect end", {
edgeId: edge.id,
edgeClassName: edge.className ?? null,
source: edge.source,
target: edge.target,
error: String(error),
});
});
}
edgeReconnectSuccessful.current = true;
},
[removeEdge],
);
const setHighlightedIntersectionEdge = useCallback((edgeId: string | null) => {
const previousHighlightedEdgeId = highlightedEdgeRef.current;
if (previousHighlightedEdgeId === edgeId) {
return;
}
setEdges((currentEdges) => {
let nextEdges = currentEdges;
if (previousHighlightedEdgeId) {
nextEdges = nextEdges.map((edge) =>
edge.id === previousHighlightedEdgeId
? {
...edge,
style: highlightedEdgeOriginalStyleRef.current,
}
: edge,
);
}
if (!edgeId) {
highlightedEdgeOriginalStyleRef.current = undefined;
return nextEdges;
}
const edgeToHighlight = nextEdges.find((edge) => edge.id === edgeId);
if (!edgeToHighlight || edgeToHighlight.className === "temp") {
highlightedEdgeOriginalStyleRef.current = undefined;
return nextEdges;
}
highlightedEdgeOriginalStyleRef.current = edgeToHighlight.style;
return nextEdges.map((edge) =>
edge.id === edgeId
? {
...edge,
style: {
...(edge.style ?? {}),
...EDGE_INTERSECTION_HIGHLIGHT_STYLE,
},
}
: edge,
);
});
highlightedEdgeRef.current = edgeId;
}, []);
const onNodeDrag = useCallback(
(_event: React.MouseEvent, node: RFNode) => {
const nodeCenter = getNodeCenterClientPosition(node.id);
if (!nodeCenter) {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
return;
}
const intersectedEdgeId = getIntersectedEdgeId(nodeCenter);
if (!intersectedEdgeId) {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
return;
}
const intersectedEdge = edges.find(
(edge) => edge.id === intersectedEdgeId && edge.className !== "temp",
);
if (!intersectedEdge) {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
return;
}
if (
intersectedEdge.source === node.id ||
intersectedEdge.target === node.id
) {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
return;
}
const handles = NODE_HANDLE_MAP[node.type ?? ""];
if (!hasHandleKey(handles, "source") || !hasHandleKey(handles, "target")) {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
return;
}
overlappedEdgeRef.current = intersectedEdge.id;
setHighlightedIntersectionEdge(intersectedEdge.id);
},
[edges, setHighlightedIntersectionEdge],
);
// ─── Drag Start → Lock ────────────────────────────────────────
const onNodeDragStart = useCallback(() => {
isDragging.current = true;
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
}, [setHighlightedIntersectionEdge]);
// ─── Drag Stop → Commit zu Convex ─────────────────────────────
const onNodeDragStop = useCallback(
(_: React.MouseEvent, node: RFNode, draggedNodes: RFNode[]) => {
const intersectedEdgeId = overlappedEdgeRef.current;
void (async () => {
try {
// isDragging bleibt true bis alle Mutations resolved sind
if (draggedNodes.length > 1) {
await batchMoveNodes({
moves: draggedNodes.map((n) => ({
nodeId: n.id as Id<"nodes">,
positionX: n.position.x,
positionY: n.position.y,
})),
});
} else {
await moveNode({
nodeId: node.id as Id<"nodes">,
positionX: node.position.x,
positionY: node.position.y,
});
}
if (!intersectedEdgeId) {
return;
}
const intersectedEdge = edges.find((edge) => edge.id === intersectedEdgeId);
if (!intersectedEdge || intersectedEdge.className === "temp") {
return;
}
if (
intersectedEdge.source === node.id ||
intersectedEdge.target === node.id
) {
return;
}
const handles = NODE_HANDLE_MAP[node.type ?? ""];
if (!hasHandleKey(handles, "source") || !hasHandleKey(handles, "target")) {
return;
}
await createEdge({
canvasId,
sourceNodeId: intersectedEdge.source as Id<"nodes">,
targetNodeId: node.id as Id<"nodes">,
sourceHandle: normalizeHandle(intersectedEdge.sourceHandle),
targetHandle: normalizeHandle(handles.target),
});
await createEdge({
canvasId,
sourceNodeId: node.id as Id<"nodes">,
targetNodeId: intersectedEdge.target as Id<"nodes">,
sourceHandle: normalizeHandle(handles.source),
targetHandle: normalizeHandle(intersectedEdge.targetHandle),
});
await removeEdge({ edgeId: intersectedEdge.id as Id<"edges"> });
} catch (error) {
console.error("[Canvas edge intersection split failed]", {
canvasId,
nodeId: node.id,
nodeType: node.type,
intersectedEdgeId,
error: String(error),
});
} finally {
overlappedEdgeRef.current = null;
setHighlightedIntersectionEdge(null);
isDragging.current = false;
}
})();
},
[
batchMoveNodes,
canvasId,
createEdge,
edges,
moveNode,
removeEdge,
setHighlightedIntersectionEdge,
],
);
// ─── Neue Verbindung → Convex Edge ────────────────────────────
const onConnect = useCallback(
(connection: Connection) => {
if (connection.source && connection.target) {
createEdge({
canvasId,
sourceNodeId: connection.source as Id<"nodes">,
targetNodeId: connection.target as Id<"nodes">,
sourceHandle: connection.sourceHandle ?? undefined,
targetHandle: connection.targetHandle ?? undefined,
});
}
},
[createEdge, canvasId],
);
// ─── Node löschen → Convex ────────────────────────────────────
const onNodesDelete = useCallback(
(deletedNodes: RFNode[]) => {
const count = deletedNodes.length;
if (count === 0) return;
// Optimistic: Node-IDs sofort als "wird gelöscht" markieren
const idsToDelete = deletedNodes.map((n) => n.id);
for (const id of idsToDelete) {
deletingNodeIds.current.add(id);
}
// Auto-Reconnect: Für jeden gelöschten Node eingehende und ausgehende Edges verbinden
const edgePromises: Promise<unknown>[] = [];
for (const node of deletedNodes) {
const incomingEdges = edges.filter((e) => e.target === node.id);
const outgoingEdges = edges.filter((e) => e.source === node.id);
if (incomingEdges.length > 0 && outgoingEdges.length > 0) {
for (const incoming of incomingEdges) {
for (const outgoing of outgoingEdges) {
edgePromises.push(
createEdge({
canvasId,
sourceNodeId: incoming.source as Id<"nodes">,
targetNodeId: outgoing.target as Id<"nodes">,
sourceHandle: incoming.sourceHandle ?? undefined,
targetHandle: outgoing.targetHandle ?? undefined,
}),
);
}
}
}
}
// Batch-Delete + Auto-Reconnect parallel, dann deletingNodeIds aufräumen
void Promise.all([
batchRemoveNodes({
nodeIds: idsToDelete as Id<"nodes">[],
}),
...edgePromises,
])
.then(() => {
for (const id of idsToDelete) {
deletingNodeIds.current.delete(id);
}
})
.catch((error: unknown) => {
console.error("[Canvas] batch remove failed", error);
// Bei Fehler: deletingNodeIds aufräumen, damit Nodes wieder erscheinen
for (const id of idsToDelete) {
deletingNodeIds.current.delete(id);
}
});
if (count > 0) {
const { title } = msg.canvas.nodesRemoved(count);
toast.info(title);
}
},
[edges, batchRemoveNodes, createEdge, canvasId],
);
// ─── Edge löschen → Convex ────────────────────────────────────
const onEdgesDelete = useCallback(
(deletedEdges: RFEdge[]) => {
for (const edge of deletedEdges) {
if (edge.className === "temp") {
continue;
}
void removeEdge({ edgeId: edge.id as Id<"edges"> }).catch((error) => {
console.error("[Canvas edge remove failed] edge delete", {
edgeId: edge.id,
edgeClassName: edge.className ?? null,
source: edge.source,
target: edge.target,
error: String(error),
});
});
}
},
[removeEdge],
);
const onDragOver = useCallback((event: React.DragEvent) => {
event.preventDefault();
event.dataTransfer.dropEffect = "move";
}, []);
const onDrop = useCallback(
(event: React.DragEvent) => {
event.preventDefault();
const nodeType = event.dataTransfer.getData(
"application/lemonspace-node-type",
);
if (!nodeType) {
return;
}
const position = screenToFlowPosition({
x: event.clientX,
y: event.clientY,
});
const defaults = NODE_DEFAULTS[nodeType] ?? {
width: 200,
height: 100,
data: {},
};
createNode({
canvasId,
type: nodeType,
positionX: position.x,
positionY: position.y,
width: defaults.width,
height: defaults.height,
data: { ...defaults.data, canvasId },
});
},
[screenToFlowPosition, createNode, canvasId],
);
// ─── Loading State ────────────────────────────────────────────
if (convexNodes === undefined || convexEdges === undefined) {
return (
<div className="flex h-full w-full items-center justify-center bg-background">
<div className="flex flex-col items-center gap-3">
<div className="h-8 w-8 animate-spin rounded-full border-2 border-primary border-t-transparent" />
<span className="text-sm text-muted-foreground">Canvas lädt</span>
</div>
</div>
);
}
return (
<CanvasPlacementProvider canvasId={canvasId}>
<div className="relative h-full w-full">
<CanvasToolbar canvasName={canvas?.name ?? "canvas"} />
<ReactFlow
nodes={nodes}
edges={edges}
defaultEdgeOptions={DEFAULT_EDGE_OPTIONS}
nodeTypes={nodeTypes}
onNodesChange={onNodesChange}
onEdgesChange={onEdgesChange}
onNodeDragStart={onNodeDragStart}
onNodeDrag={onNodeDrag}
onNodeDragStop={onNodeDragStop}
onConnect={onConnect}
onReconnect={onReconnect}
onReconnectStart={onReconnectStart}
onReconnectEnd={onReconnectEnd}
onNodesDelete={onNodesDelete}
onEdgesDelete={onEdgesDelete}
onError={onFlowError}
onDragOver={onDragOver}
onDrop={onDrop}
fitView
snapToGrid
snapGrid={[16, 16]}
deleteKeyCode={["Backspace", "Delete"]}
multiSelectionKeyCode="Shift"
proOptions={{ hideAttribution: true }}
colorMode={resolvedTheme === "dark" ? "dark" : "light"}
className="bg-background"
>
<Background variant={BackgroundVariant.Dots} gap={16} size={1} />
<Controls className="bg-card! border! shadow-sm! rounded-lg!" />
<MiniMap
className="bg-card! border! shadow-sm! rounded-lg!"
nodeColor={getMiniMapNodeColor}
nodeStrokeColor={getMiniMapNodeStrokeColor}
maskColor="rgba(0, 0, 0, 0.1)"
/>
</ReactFlow>
</div>
</CanvasPlacementProvider>
);
}
interface CanvasProps {
canvasId: Id<"canvases">;
}
export default function Canvas({ canvasId }: CanvasProps) {
return (
<ReactFlowProvider>
<CanvasInner canvasId={canvasId} />
</ReactFlowProvider>
);
}