Files
lemonspace_app/components/canvas/canvas.tsx
Matthias 9694c50195 feat: implement createNodeWithEdgeToTarget mutation for enhanced node connections
- Added a new mutation to create nodes connected to existing nodes, allowing for more dynamic interactions on the canvas.
- Updated the CanvasPlacementContext to include the new mutation, improving the workflow for node creation and edge management.
- Enhanced optimistic updates for immediate UI feedback during node and edge creation processes.
- Refactored related components to support the new connection method, streamlining user interactions.
2026-03-28 17:50:45 +01:00

1797 lines
59 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,
reconnectEdge,
type Node as RFNode,
type Edge as RFEdge,
type NodeChange,
type EdgeChange,
type Connection,
type DefaultEdgeOptions,
type OnConnectEnd,
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 { Doc, Id } from "@/convex/_generated/dataModel";
import { authClient } from "@/lib/auth-client";
import { nodeTypes } from "./node-types";
import {
computeBridgeCreatesForDeletedNodes,
convexNodeDocWithMergedStorageUrl,
convexNodeToRF,
convexEdgeToRF,
convexEdgeToRFWithSourceGlow,
NODE_DEFAULTS,
NODE_HANDLE_MAP,
resolveMediaAspectRatio,
} from "@/lib/canvas-utils";
import {
AI_IMAGE_NODE_FOOTER_PX,
AI_IMAGE_NODE_HEADER_PX,
DEFAULT_ASPECT_RATIO,
parseAspectRatioString,
} from "@/lib/image-formats";
import CanvasToolbar from "@/components/canvas/canvas-toolbar";
import { CanvasCommandPalette } from "@/components/canvas/canvas-command-palette";
import {
CanvasConnectionDropMenu,
type ConnectionDropMenuState,
} from "@/components/canvas/canvas-connection-drop-menu";
import { CanvasPlacementProvider } from "@/components/canvas/canvas-placement-context";
import CustomConnectionLine from "@/components/canvas/custom-connection-line";
import type { CanvasNodeTemplate } from "@/lib/canvas-node-templates";
interface CanvasInnerProps {
canvasId: Id<"canvases">;
}
const OPTIMISTIC_NODE_PREFIX = "optimistic_";
const OPTIMISTIC_EDGE_PREFIX = "optimistic_edge_";
function isOptimisticNodeId(id: string): boolean {
return id.startsWith(OPTIMISTIC_NODE_PREFIX);
}
function isOptimisticEdgeId(id: string): boolean {
return id.startsWith(OPTIMISTIC_EDGE_PREFIX);
}
function clientRequestIdFromOptimisticNodeId(id: string): string | null {
if (!isOptimisticNodeId(id)) return null;
const suffix = id.slice(OPTIMISTIC_NODE_PREFIX.length);
return suffix.length > 0 ? suffix : null;
}
function getConnectEndClientPoint(
event: MouseEvent | TouchEvent,
): { x: number; y: number } | null {
if ("clientX" in event && typeof event.clientX === "number") {
return { x: event.clientX, y: event.clientY };
}
const t = (event as TouchEvent).changedTouches?.[0];
if (t) return { x: t.clientX, y: t.clientY };
return null;
}
/** Kanten-Split nach Drag: wartet auf echte Node-ID, wenn der Knoten noch optimistisch ist. */
type PendingEdgeSplit = {
intersectedEdgeId: Id<"edges">;
sourceNodeId: Id<"nodes">;
targetNodeId: Id<"nodes">;
intersectedSourceHandle?: string;
intersectedTargetHandle?: string;
middleSourceHandle?: string;
middleTargetHandle?: string;
positionX: number;
positionY: number;
};
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: "var(--xy-edge-stroke)",
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;
}
if (incomingNode.type === "prompt") {
const prevW = typeof previousNode.style?.width === "number" ? previousNode.style.width : null;
const prevH = typeof previousNode.style?.height === "number" ? previousNode.style.height : null;
const inW = typeof incomingNode.style?.width === "number" ? incomingNode.style.width : null;
const inH = typeof incomingNode.style?.height === "number" ? incomingNode.style.height : null;
void prevW;
void prevH;
void inW;
void inH;
}
const previousResizing =
typeof (previousNode as { resizing?: boolean }).resizing === "boolean"
? (previousNode as { resizing?: boolean }).resizing
: false;
const isMediaNode =
incomingNode.type === "asset" ||
incomingNode.type === "image" ||
incomingNode.type === "ai-image";
const shouldPreserveInteractivePosition =
isMediaNode && (Boolean(previousNode.selected) || Boolean(previousNode.dragging) || previousResizing);
const shouldPreserveInteractiveSize =
isMediaNode && (Boolean(previousNode.dragging) || previousResizing);
const previousStyleWidth = typeof previousNode.style?.width === "number" ? previousNode.style.width : null;
const previousStyleHeight = typeof previousNode.style?.height === "number" ? previousNode.style.height : null;
const incomingStyleWidth = typeof incomingNode.style?.width === "number" ? incomingNode.style.width : null;
const incomingStyleHeight = typeof incomingNode.style?.height === "number" ? incomingNode.style.height : null;
const isAssetSeedSize = previousStyleWidth === 260 && previousStyleHeight === 240;
const isImageSeedSize = previousStyleWidth === 280 && previousStyleHeight === 200;
const canApplySeedSizeCorrection =
isMediaNode &&
Boolean(previousNode.selected) &&
!previousNode.dragging &&
!previousResizing &&
((incomingNode.type === "asset" && isAssetSeedSize) ||
(incomingNode.type === "image" && isImageSeedSize)) &&
incomingStyleWidth !== null &&
incomingStyleHeight !== null &&
(incomingStyleWidth !== previousStyleWidth || incomingStyleHeight !== previousStyleHeight);
if (shouldPreserveInteractivePosition) {
const nextStyle = shouldPreserveInteractiveSize || !canApplySeedSizeCorrection
? previousNode.style
: incomingNode.style;
return {
...previousNode,
...incomingNode,
position: previousNode.position,
style: nextStyle,
selected: previousNode.selected,
dragging: previousNode.dragging,
};
}
return {
...previousNode,
...incomingNode,
selected: previousNode.selected,
dragging: previousNode.dragging,
};
});
}
function CanvasInner({ canvasId }: CanvasInnerProps) {
const { screenToFlowPosition } = useReactFlow();
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 storageUrlsById = useQuery(
api.storage.batchGetUrlsForCanvas,
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 pendingMoveAfterCreateRef = useRef(
new Map<string, { positionX: number; positionY: number }>(),
);
const resolvedRealIdByClientRequestRef = useRef(new Map<string, Id<"nodes">>());
const pendingEdgeSplitByClientRequestRef = useRef(
new Map<string, PendingEdgeSplit>(),
);
const createNode = useMutation(api.nodes.create).withOptimisticUpdate(
(localStore, args) => {
const current = localStore.getQuery(api.nodes.list, {
canvasId: args.canvasId,
});
if (current === undefined) return;
const tempId = (
args.clientRequestId
? `${OPTIMISTIC_NODE_PREFIX}${args.clientRequestId}`
: `${OPTIMISTIC_NODE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}`
) as Id<"nodes">;
const synthetic: Doc<"nodes"> = {
_id: tempId,
_creationTime: Date.now(),
canvasId: args.canvasId,
type: args.type as Doc<"nodes">["type"],
positionX: args.positionX,
positionY: args.positionY,
width: args.width,
height: args.height,
status: "idle",
retryCount: 0,
data: args.data,
parentId: args.parentId,
zIndex: args.zIndex,
};
localStore.setQuery(
api.nodes.list,
{ canvasId: args.canvasId },
[...current, synthetic],
);
},
);
const createNodeWithEdgeFromSource = useMutation(
api.nodes.createWithEdgeFromSource,
).withOptimisticUpdate((localStore, args) => {
const nodeList = localStore.getQuery(api.nodes.list, {
canvasId: args.canvasId,
});
const edgeList = localStore.getQuery(api.edges.list, {
canvasId: args.canvasId,
});
if (nodeList === undefined || edgeList === undefined) return;
const tempNodeId = (
args.clientRequestId
? `${OPTIMISTIC_NODE_PREFIX}${args.clientRequestId}`
: `${OPTIMISTIC_NODE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}`
) as Id<"nodes">;
const tempEdgeId = (
args.clientRequestId
? `${OPTIMISTIC_EDGE_PREFIX}${args.clientRequestId}`
: `${OPTIMISTIC_EDGE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}`
) as Id<"edges">;
const syntheticNode: Doc<"nodes"> = {
_id: tempNodeId,
_creationTime: Date.now(),
canvasId: args.canvasId,
type: args.type as Doc<"nodes">["type"],
positionX: args.positionX,
positionY: args.positionY,
width: args.width,
height: args.height,
status: "idle",
retryCount: 0,
data: args.data,
parentId: args.parentId,
zIndex: args.zIndex,
};
const syntheticEdge: Doc<"edges"> = {
_id: tempEdgeId,
_creationTime: Date.now(),
canvasId: args.canvasId,
sourceNodeId: args.sourceNodeId,
targetNodeId: tempNodeId,
sourceHandle: args.sourceHandle,
targetHandle: args.targetHandle,
};
localStore.setQuery(api.nodes.list, { canvasId: args.canvasId }, [
...nodeList,
syntheticNode,
]);
localStore.setQuery(api.edges.list, { canvasId: args.canvasId }, [
...edgeList,
syntheticEdge,
]);
});
const createNodeWithEdgeToTarget = useMutation(
api.nodes.createWithEdgeToTarget,
).withOptimisticUpdate((localStore, args) => {
const nodeList = localStore.getQuery(api.nodes.list, {
canvasId: args.canvasId,
});
const edgeList = localStore.getQuery(api.edges.list, {
canvasId: args.canvasId,
});
if (nodeList === undefined || edgeList === undefined) return;
const tempNodeId = (
args.clientRequestId
? `${OPTIMISTIC_NODE_PREFIX}${args.clientRequestId}`
: `${OPTIMISTIC_NODE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}`
) as Id<"nodes">;
const tempEdgeId = (
args.clientRequestId
? `${OPTIMISTIC_EDGE_PREFIX}${args.clientRequestId}`
: `${OPTIMISTIC_EDGE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}`
) as Id<"edges">;
const syntheticNode: Doc<"nodes"> = {
_id: tempNodeId,
_creationTime: Date.now(),
canvasId: args.canvasId,
type: args.type as Doc<"nodes">["type"],
positionX: args.positionX,
positionY: args.positionY,
width: args.width,
height: args.height,
status: "idle",
retryCount: 0,
data: args.data,
parentId: args.parentId,
zIndex: args.zIndex,
};
const syntheticEdge: Doc<"edges"> = {
_id: tempEdgeId,
_creationTime: Date.now(),
canvasId: args.canvasId,
sourceNodeId: tempNodeId,
targetNodeId: args.targetNodeId,
sourceHandle: args.sourceHandle,
targetHandle: args.targetHandle,
};
localStore.setQuery(api.nodes.list, { canvasId: args.canvasId }, [
...nodeList,
syntheticNode,
]);
localStore.setQuery(api.edges.list, { canvasId: args.canvasId }, [
...edgeList,
syntheticEdge,
]);
});
const createNodeWithEdgeSplit = useMutation(api.nodes.createWithEdgeSplit);
const batchRemoveNodes = useMutation(api.nodes.batchRemove).withOptimisticUpdate(
(localStore, args) => {
const nodeList = localStore.getQuery(api.nodes.list, { canvasId });
const edgeList = localStore.getQuery(api.edges.list, { canvasId });
if (nodeList === undefined || edgeList === undefined) return;
const removeSet = new Set<string>(args.nodeIds.map((id) => id as string));
localStore.setQuery(
api.nodes.list,
{ canvasId },
nodeList.filter((n) => !removeSet.has(n._id)),
);
localStore.setQuery(
api.edges.list,
{ canvasId },
edgeList.filter(
(e) =>
!removeSet.has(e.sourceNodeId) && !removeSet.has(e.targetNodeId),
),
);
},
);
const createEdge = useMutation(api.edges.create).withOptimisticUpdate(
(localStore, args) => {
const edgeList = localStore.getQuery(api.edges.list, {
canvasId: args.canvasId,
});
if (edgeList === undefined) return;
const tempId = `${OPTIMISTIC_EDGE_PREFIX}${Date.now()}_${Math.random().toString(36).slice(2, 11)}` as Id<"edges">;
const synthetic: Doc<"edges"> = {
_id: tempId,
_creationTime: Date.now(),
canvasId: args.canvasId,
sourceNodeId: args.sourceNodeId,
targetNodeId: args.targetNodeId,
sourceHandle: args.sourceHandle,
targetHandle: args.targetHandle,
};
localStore.setQuery(
api.edges.list,
{ canvasId: args.canvasId },
[...edgeList, synthetic],
);
},
);
const removeEdge = useMutation(api.edges.remove).withOptimisticUpdate(
(localStore, args) => {
const edgeList = localStore.getQuery(api.edges.list, { canvasId });
if (edgeList === undefined) return;
localStore.setQuery(
api.edges.list,
{ canvasId },
edgeList.filter((e) => e._id !== args.edgeId),
);
},
);
const splitEdgeAtExistingNodeMut = useMutation(
api.nodes.splitEdgeAtExistingNode,
).withOptimisticUpdate((localStore, args) => {
const edgeList = localStore.getQuery(api.edges.list, {
canvasId: args.canvasId,
});
const nodeList = localStore.getQuery(api.nodes.list, {
canvasId: args.canvasId,
});
if (edgeList === undefined || nodeList === undefined) return;
const removed = edgeList.find((e) => e._id === args.splitEdgeId);
if (!removed) return;
const t1 = `${OPTIMISTIC_EDGE_PREFIX}s1_${Date.now()}_${Math.random().toString(36).slice(2, 10)}` as Id<"edges">;
const t2 = `${OPTIMISTIC_EDGE_PREFIX}s2_${Date.now()}_${Math.random().toString(36).slice(2, 10)}` as Id<"edges">;
const now = Date.now();
const nextEdges = edgeList.filter((e) => e._id !== args.splitEdgeId);
nextEdges.push(
{
_id: t1,
_creationTime: now,
canvasId: args.canvasId,
sourceNodeId: removed.sourceNodeId,
targetNodeId: args.middleNodeId,
sourceHandle: args.splitSourceHandle,
targetHandle: args.newNodeTargetHandle,
},
{
_id: t2,
_creationTime: now,
canvasId: args.canvasId,
sourceNodeId: args.middleNodeId,
targetNodeId: removed.targetNodeId,
sourceHandle: args.newNodeSourceHandle,
targetHandle: args.splitTargetHandle,
},
);
localStore.setQuery(api.edges.list, { canvasId: args.canvasId }, nextEdges);
if (args.positionX !== undefined && args.positionY !== undefined) {
const px = args.positionX;
const py = args.positionY;
localStore.setQuery(
api.nodes.list,
{ canvasId: args.canvasId },
nodeList.map((n) =>
n._id === args.middleNodeId
? {
...n,
positionX: px,
positionY: py,
}
: n,
),
);
}
});
/** Pairing: create kann vor oder nach Drag-Ende fertig sein. Kanten-Split + Position in einem Convex-Roundtrip wenn split ansteht. */
const syncPendingMoveForClientRequest = useCallback(
(clientRequestId: string | undefined, realId?: Id<"nodes">) => {
if (!clientRequestId) return;
if (realId !== undefined) {
const pendingMove = pendingMoveAfterCreateRef.current.get(clientRequestId);
const splitPayload =
pendingEdgeSplitByClientRequestRef.current.get(clientRequestId);
if (splitPayload) {
pendingEdgeSplitByClientRequestRef.current.delete(clientRequestId);
if (pendingMove) {
pendingMoveAfterCreateRef.current.delete(clientRequestId);
}
resolvedRealIdByClientRequestRef.current.delete(clientRequestId);
void splitEdgeAtExistingNodeMut({
canvasId,
splitEdgeId: splitPayload.intersectedEdgeId,
middleNodeId: realId,
splitSourceHandle: splitPayload.intersectedSourceHandle,
splitTargetHandle: splitPayload.intersectedTargetHandle,
newNodeSourceHandle: splitPayload.middleSourceHandle,
newNodeTargetHandle: splitPayload.middleTargetHandle,
positionX: pendingMove?.positionX ?? splitPayload.positionX,
positionY: pendingMove?.positionY ?? splitPayload.positionY,
}).catch((error: unknown) => {
console.error("[Canvas pending edge split failed]", {
clientRequestId,
realId,
error: String(error),
});
});
return;
}
if (pendingMove) {
pendingMoveAfterCreateRef.current.delete(clientRequestId);
resolvedRealIdByClientRequestRef.current.delete(clientRequestId);
void moveNode({
nodeId: realId,
positionX: pendingMove.positionX,
positionY: pendingMove.positionY,
});
return;
}
resolvedRealIdByClientRequestRef.current.set(clientRequestId, realId);
return;
}
const r = resolvedRealIdByClientRequestRef.current.get(clientRequestId);
const p = pendingMoveAfterCreateRef.current.get(clientRequestId);
if (!r || !p) return;
pendingMoveAfterCreateRef.current.delete(clientRequestId);
resolvedRealIdByClientRequestRef.current.delete(clientRequestId);
const splitPayload =
pendingEdgeSplitByClientRequestRef.current.get(clientRequestId);
if (splitPayload) {
pendingEdgeSplitByClientRequestRef.current.delete(clientRequestId);
void splitEdgeAtExistingNodeMut({
canvasId,
splitEdgeId: splitPayload.intersectedEdgeId,
middleNodeId: r,
splitSourceHandle: splitPayload.intersectedSourceHandle,
splitTargetHandle: splitPayload.intersectedTargetHandle,
newNodeSourceHandle: splitPayload.middleSourceHandle,
newNodeTargetHandle: splitPayload.middleTargetHandle,
positionX: splitPayload.positionX ?? p.positionX,
positionY: splitPayload.positionY ?? p.positionY,
}).catch((error: unknown) => {
console.error("[Canvas pending edge split failed]", {
clientRequestId,
realId: r,
error: String(error),
});
});
} else {
void moveNode({
nodeId: r,
positionX: p.positionX,
positionY: p.positionY,
});
}
},
[canvasId, moveNode, splitEdgeAtExistingNodeMut],
);
// ─── Lokaler State (für flüssiges Dragging) ───────────────────
const [nodes, setNodes] = useState<RFNode[]>([]);
const [edges, setEdges] = useState<RFEdge[]>([]);
const [connectionDropMenu, setConnectionDropMenu] =
useState<ConnectionDropMenuState | null>(null);
const connectionDropMenuRef = useRef<ConnectionDropMenuState | null>(null);
connectionDropMenuRef.current = connectionDropMenu;
// 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 isReconnectDragActiveRef = useRef(false);
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 prevDataById = new Map(
previousNodes.map((node) => [node.id, node.data as Record<string, unknown>]),
);
const enriched = convexNodes.map((node) =>
convexNodeDocWithMergedStorageUrl(
node,
storageUrlsById,
prevDataById,
),
);
const incomingNodes = withResolvedCompareData(
enriched.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, storageUrlsById]);
useEffect(() => {
if (!convexEdges) return;
setEdges((prev) => {
const tempEdges = prev.filter((e) => e.className === "temp");
const sourceTypeByNodeId =
convexNodes !== undefined
? new Map(convexNodes.map((n) => [n._id, n.type]))
: undefined;
const glowMode = resolvedTheme === "dark" ? "dark" : "light";
const mapped = convexEdges.map((edge) =>
sourceTypeByNodeId
? convexEdgeToRFWithSourceGlow(
edge,
sourceTypeByNodeId.get(edge.sourceNodeId),
glowMode,
)
: convexEdgeToRF(edge),
);
return [...mapped, ...tempEdges];
});
}, [convexEdges, convexNodes, resolvedTheme]);
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 adjustedChanges = changes
.map((change) => {
if (change.type !== "dimensions" || !change.dimensions) {
return change;
}
const node = nds.find((candidate) => candidate.id === change.id);
if (!node) {
return change;
}
const isActiveResize =
change.resizing === true || change.resizing === false;
if (node.type === "asset") {
if (!isActiveResize) {
return change;
}
const nodeData = node.data as {
intrinsicWidth?: number;
intrinsicHeight?: number;
orientation?: string;
};
const hasIntrinsicRatioInput =
typeof nodeData.intrinsicWidth === "number" &&
nodeData.intrinsicWidth > 0 &&
typeof nodeData.intrinsicHeight === "number" &&
nodeData.intrinsicHeight > 0;
if (!hasIntrinsicRatioInput) {
return change;
}
const targetRatio = resolveMediaAspectRatio(
nodeData.intrinsicWidth,
nodeData.intrinsicHeight,
nodeData.orientation,
);
if (!Number.isFinite(targetRatio) || targetRatio <= 0) {
return change;
}
const previousWidth =
typeof node.style?.width === "number"
? node.style.width
: change.dimensions.width;
const previousHeight =
typeof node.style?.height === "number"
? node.style.height
: change.dimensions.height;
const widthDelta = Math.abs(change.dimensions.width - previousWidth);
const heightDelta = Math.abs(change.dimensions.height - previousHeight);
let constrainedWidth = change.dimensions.width;
let constrainedHeight = change.dimensions.height;
// Axis with larger delta drives resize; the other axis is ratio-locked.
if (heightDelta > widthDelta) {
constrainedWidth = constrainedHeight * targetRatio;
} else {
constrainedHeight = constrainedWidth / targetRatio;
}
const assetChromeHeight = 88;
const assetMinPreviewHeight = 120;
const assetMinNodeHeight = assetChromeHeight + assetMinPreviewHeight;
const assetMinNodeWidth = 140;
const minWidthFromHeight = assetMinNodeHeight * targetRatio;
const minimumAllowedWidth = Math.max(assetMinNodeWidth, minWidthFromHeight);
const minimumAllowedHeight = minimumAllowedWidth / targetRatio;
const enforcedWidth = Math.max(constrainedWidth, minimumAllowedWidth);
const enforcedHeight = Math.max(
constrainedHeight,
minimumAllowedHeight,
assetMinNodeHeight,
);
return {
...change,
dimensions: {
...change.dimensions,
width: enforcedWidth,
height: enforcedHeight,
},
};
}
if (node.type === "ai-image") {
if (!isActiveResize) {
return change;
}
const nodeData = node.data as { aspectRatio?: string };
const arLabel =
typeof nodeData.aspectRatio === "string" && nodeData.aspectRatio.trim()
? nodeData.aspectRatio.trim()
: DEFAULT_ASPECT_RATIO;
let arW: number;
let arH: number;
try {
const parsed = parseAspectRatioString(arLabel);
arW = parsed.w;
arH = parsed.h;
} catch {
return change;
}
const chrome = AI_IMAGE_NODE_HEADER_PX + AI_IMAGE_NODE_FOOTER_PX;
const hPerW = arH / arW;
const previousWidth =
typeof node.style?.width === "number"
? node.style.width
: change.dimensions.width;
const previousHeight =
typeof node.style?.height === "number"
? node.style.height
: change.dimensions.height;
const widthDelta = Math.abs(change.dimensions.width - previousWidth);
const heightDelta = Math.abs(change.dimensions.height - previousHeight);
let constrainedWidth = change.dimensions.width;
let constrainedHeight = change.dimensions.height;
if (heightDelta > widthDelta) {
const viewportH = Math.max(1, constrainedHeight - chrome);
constrainedWidth = viewportH * (arW / arH);
constrainedHeight = chrome + viewportH;
} else {
constrainedHeight = chrome + constrainedWidth * hPerW;
}
const aiMinViewport = 120;
const aiMinOuterHeight = chrome + aiMinViewport;
const aiMinOuterWidthBase = 200;
const minimumAllowedWidth = Math.max(
aiMinOuterWidthBase,
aiMinViewport * (arW / arH),
);
const minimumAllowedHeight = Math.max(
aiMinOuterHeight,
chrome + minimumAllowedWidth * hPerW,
);
let enforcedWidth = Math.max(constrainedWidth, minimumAllowedWidth);
let enforcedHeight = chrome + enforcedWidth * hPerW;
if (enforcedHeight < minimumAllowedHeight) {
enforcedHeight = minimumAllowedHeight;
enforcedWidth = (enforcedHeight - chrome) * (arW / arH);
}
enforcedWidth = Math.max(enforcedWidth, minimumAllowedWidth);
enforcedHeight = chrome + enforcedWidth * hPerW;
return {
...change,
dimensions: {
...change.dimensions,
width: enforcedWidth,
height: enforcedHeight,
},
};
}
return change;
})
.filter((change): change is NodeChange => change !== null);
const nextNodes = applyNodeChanges(adjustedChanges, nds);
for (const change of adjustedChanges) {
if (change.type !== "dimensions") continue;
if (!change.dimensions) continue;
if (removedIds.has(change.id)) continue;
const prevNode = nds.find((node) => node.id === change.id);
const nextNode = nextNodes.find((node) => node.id === change.id);
void prevNode;
void nextNode;
if (change.resizing !== false) 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;
console.error("[ReactFlow error]", { canvasId, code, message });
}, [canvasId]);
// ─── Delete Edge on Drop ──────────────────────────────────────
const onReconnectStart = useCallback(() => {
edgeReconnectSuccessful.current = false;
isReconnectDragActiveRef.current = true;
}, []);
const onReconnect = useCallback(
(oldEdge: RFEdge, newConnection: Connection) => {
edgeReconnectSuccessful.current = true;
setEdges((els) => reconnectEdge(oldEdge, newConnection, els));
},
[],
);
const onReconnectEnd = useCallback(
(_: MouseEvent | TouchEvent, edge: RFEdge) => {
try {
if (!edgeReconnectSuccessful.current) {
setEdges((eds) => eds.filter((e) => e.id !== edge.id));
if (edge.className === "temp") {
edgeReconnectSuccessful.current = true;
return;
}
if (isOptimisticEdgeId(edge.id)) {
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;
} finally {
isReconnectDragActiveRef.current = false;
}
},
[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 {
const intersectedEdge = intersectedEdgeId
? edges.find(
(edge) =>
edge.id === intersectedEdgeId && edge.className !== "temp",
)
: undefined;
const splitHandles = NODE_HANDLE_MAP[node.type ?? ""];
const splitEligible =
intersectedEdge !== undefined &&
splitHandles !== undefined &&
intersectedEdge.source !== node.id &&
intersectedEdge.target !== node.id &&
hasHandleKey(splitHandles, "source") &&
hasHandleKey(splitHandles, "target");
if (draggedNodes.length > 1) {
for (const n of draggedNodes) {
const cid = clientRequestIdFromOptimisticNodeId(n.id);
if (cid) {
pendingMoveAfterCreateRef.current.set(cid, {
positionX: n.position.x,
positionY: n.position.y,
});
syncPendingMoveForClientRequest(cid);
}
}
const realMoves = draggedNodes.filter((n) => !isOptimisticNodeId(n.id));
if (realMoves.length > 0) {
await batchMoveNodes({
moves: realMoves.map((n) => ({
nodeId: n.id as Id<"nodes">,
positionX: n.position.x,
positionY: n.position.y,
})),
});
}
if (!splitEligible || !intersectedEdge) {
return;
}
const multiCid = clientRequestIdFromOptimisticNodeId(node.id);
let middleId = node.id as Id<"nodes">;
if (multiCid) {
const r = resolvedRealIdByClientRequestRef.current.get(multiCid);
if (!r) {
pendingEdgeSplitByClientRequestRef.current.set(multiCid, {
intersectedEdgeId: intersectedEdge.id as Id<"edges">,
sourceNodeId: intersectedEdge.source as Id<"nodes">,
targetNodeId: intersectedEdge.target as Id<"nodes">,
intersectedSourceHandle: normalizeHandle(
intersectedEdge.sourceHandle,
),
intersectedTargetHandle: normalizeHandle(
intersectedEdge.targetHandle,
),
middleSourceHandle: normalizeHandle(splitHandles.source),
middleTargetHandle: normalizeHandle(splitHandles.target),
positionX: node.position.x,
positionY: node.position.y,
});
return;
}
middleId = r;
}
await splitEdgeAtExistingNodeMut({
canvasId,
splitEdgeId: intersectedEdge.id as Id<"edges">,
middleNodeId: middleId,
splitSourceHandle: normalizeHandle(intersectedEdge.sourceHandle),
splitTargetHandle: normalizeHandle(intersectedEdge.targetHandle),
newNodeSourceHandle: normalizeHandle(splitHandles.source),
newNodeTargetHandle: normalizeHandle(splitHandles.target),
});
return;
}
if (!splitEligible || !intersectedEdge) {
const cidSingle = clientRequestIdFromOptimisticNodeId(node.id);
if (cidSingle) {
pendingMoveAfterCreateRef.current.set(cidSingle, {
positionX: node.position.x,
positionY: node.position.y,
});
syncPendingMoveForClientRequest(cidSingle);
} else {
await moveNode({
nodeId: node.id as Id<"nodes">,
positionX: node.position.x,
positionY: node.position.y,
});
}
return;
}
const singleCid = clientRequestIdFromOptimisticNodeId(node.id);
if (singleCid) {
const resolvedSingle =
resolvedRealIdByClientRequestRef.current.get(singleCid);
if (!resolvedSingle) {
pendingMoveAfterCreateRef.current.set(singleCid, {
positionX: node.position.x,
positionY: node.position.y,
});
pendingEdgeSplitByClientRequestRef.current.set(singleCid, {
intersectedEdgeId: intersectedEdge.id as Id<"edges">,
sourceNodeId: intersectedEdge.source as Id<"nodes">,
targetNodeId: intersectedEdge.target as Id<"nodes">,
intersectedSourceHandle: normalizeHandle(
intersectedEdge.sourceHandle,
),
intersectedTargetHandle: normalizeHandle(
intersectedEdge.targetHandle,
),
middleSourceHandle: normalizeHandle(splitHandles.source),
middleTargetHandle: normalizeHandle(splitHandles.target),
positionX: node.position.x,
positionY: node.position.y,
});
syncPendingMoveForClientRequest(singleCid);
return;
}
await splitEdgeAtExistingNodeMut({
canvasId,
splitEdgeId: intersectedEdge.id as Id<"edges">,
middleNodeId: resolvedSingle,
splitSourceHandle: normalizeHandle(intersectedEdge.sourceHandle),
splitTargetHandle: normalizeHandle(intersectedEdge.targetHandle),
newNodeSourceHandle: normalizeHandle(splitHandles.source),
newNodeTargetHandle: normalizeHandle(splitHandles.target),
positionX: node.position.x,
positionY: node.position.y,
});
pendingMoveAfterCreateRef.current.delete(singleCid);
return;
}
await splitEdgeAtExistingNodeMut({
canvasId,
splitEdgeId: intersectedEdge.id as Id<"edges">,
middleNodeId: node.id as Id<"nodes">,
splitSourceHandle: normalizeHandle(intersectedEdge.sourceHandle),
splitTargetHandle: normalizeHandle(intersectedEdge.targetHandle),
newNodeSourceHandle: normalizeHandle(splitHandles.source),
newNodeTargetHandle: normalizeHandle(splitHandles.target),
positionX: node.position.x,
positionY: node.position.y,
});
} 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,
edges,
moveNode,
setHighlightedIntersectionEdge,
splitEdgeAtExistingNodeMut,
syncPendingMoveForClientRequest,
],
);
// ─── 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],
);
const onConnectEnd = useCallback<OnConnectEnd>(
(event, connectionState) => {
if (isReconnectDragActiveRef.current) return;
if (connectionState.isValid === true) return;
const fromNode = connectionState.fromNode;
const fromHandle = connectionState.fromHandle;
if (!fromNode || !fromHandle) return;
const pt = getConnectEndClientPoint(event);
if (!pt) return;
const flow = screenToFlowPosition({ x: pt.x, y: pt.y });
setConnectionDropMenu({
screenX: pt.x,
screenY: pt.y,
flowX: flow.x,
flowY: flow.y,
fromNodeId: fromNode.id as Id<"nodes">,
fromHandleId: fromHandle.id ?? undefined,
fromHandleType: fromHandle.type,
});
},
[screenToFlowPosition],
);
const handleConnectionDropPick = useCallback(
(template: CanvasNodeTemplate) => {
const ctx = connectionDropMenuRef.current;
if (!ctx) return;
const defaults = NODE_DEFAULTS[template.type] ?? {
width: 200,
height: 100,
data: {},
};
const clientRequestId = crypto.randomUUID();
const handles = NODE_HANDLE_MAP[template.type];
const width = template.width ?? defaults.width;
const height = template.height ?? defaults.height;
const data = {
...defaults.data,
...(template.defaultData as Record<string, unknown>),
canvasId,
};
const base = {
canvasId,
type: template.type,
positionX: ctx.flowX,
positionY: ctx.flowY,
width,
height,
data,
clientRequestId,
};
const settle = (realId: Id<"nodes">) => {
syncPendingMoveForClientRequest(clientRequestId, realId);
};
if (ctx.fromHandleType === "source") {
void createNodeWithEdgeFromSource({
...base,
sourceNodeId: ctx.fromNodeId,
sourceHandle: ctx.fromHandleId,
targetHandle: handles?.target ?? undefined,
})
.then(settle)
.catch((error) => {
console.error("[Canvas] createNodeWithEdgeFromSource failed", error);
});
} else {
void createNodeWithEdgeToTarget({
...base,
targetNodeId: ctx.fromNodeId,
sourceHandle: handles?.source ?? undefined,
targetHandle: ctx.fromHandleId,
})
.then(settle)
.catch((error) => {
console.error("[Canvas] createNodeWithEdgeToTarget failed", error);
});
}
},
[
canvasId,
createNodeWithEdgeFromSource,
createNodeWithEdgeToTarget,
syncPendingMoveForClientRequest,
],
);
// ─── 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);
}
const bridgeCreates = computeBridgeCreatesForDeletedNodes(
deletedNodes,
nodes,
edges,
);
const edgePromises = bridgeCreates.map((b) =>
createEdge({
canvasId,
sourceNodeId: b.sourceNodeId,
targetNodeId: b.targetNodeId,
sourceHandle: b.sourceHandle,
targetHandle: b.targetHandle,
}),
);
// 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);
}
},
[nodes, edges, batchRemoveNodes, createEdge, canvasId],
);
// ─── Edge löschen → Convex ────────────────────────────────────
const onEdgesDelete = useCallback(
(deletedEdges: RFEdge[]) => {
for (const edge of deletedEdges) {
if (edge.className === "temp") {
continue;
}
if (isOptimisticEdgeId(edge.id)) {
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: {},
};
const clientRequestId = crypto.randomUUID();
void createNode({
canvasId,
type: nodeType,
positionX: position.x,
positionY: position.y,
width: defaults.width,
height: defaults.height,
data: { ...defaults.data, canvasId },
clientRequestId,
}).then((realId) => {
syncPendingMoveForClientRequest(clientRequestId, realId);
});
},
[screenToFlowPosition, createNode, canvasId, syncPendingMoveForClientRequest],
);
// ─── 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}
createNode={createNode}
createNodeWithEdgeSplit={createNodeWithEdgeSplit}
createNodeWithEdgeFromSource={createNodeWithEdgeFromSource}
createNodeWithEdgeToTarget={createNodeWithEdgeToTarget}
onCreateNodeSettled={({ clientRequestId, realId }) =>
syncPendingMoveForClientRequest(clientRequestId, realId)
}
>
<div className="relative h-full w-full">
<CanvasToolbar canvasName={canvas?.name ?? "canvas"} />
<CanvasCommandPalette />
<CanvasConnectionDropMenu
state={connectionDropMenu}
onClose={() => setConnectionDropMenu(null)}
onPick={handleConnectionDropPick}
/>
<ReactFlow
nodes={nodes}
edges={edges}
onlyRenderVisibleElements
defaultEdgeOptions={DEFAULT_EDGE_OPTIONS}
connectionLineComponent={CustomConnectionLine}
nodeTypes={nodeTypes}
onNodesChange={onNodesChange}
onEdgesChange={onEdgesChange}
onNodeDragStart={onNodeDragStart}
onNodeDrag={onNodeDrag}
onNodeDragStop={onNodeDragStop}
onConnect={onConnect}
onConnectEnd={onConnectEnd}
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>
);
}