init

2026-05-31 20:25:41 +00:00
commit 0a07ab8593
275 changed files with 52660 additions and 0 deletions
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+import { useCallback, useMemo, useState } from "react";
+import type { GraphEdge, GraphNode, GraphSelection } from "./types";
+
+export interface UseGraphSelectionReturn {
+  selection: GraphSelection;
+  selectedNode: GraphNode | null;
+  selectedEdge: GraphEdge | null;
+  selectNode: (node: GraphNode | null) => void;
+  selectEdge: (edge: GraphEdge | null) => void;
+  clearSelection: () => void;
+  isNodeSelected: (nodeId: string) => boolean;
+  isEdgeSelected: (edgeId: string) => boolean;
+}
+
+export function useGraphSelection(): UseGraphSelectionReturn {
+  const [selection, setSelection] = useState<GraphSelection>({
+    type: null,
+    id: null,
+    node: undefined,
+    edge: undefined,
+  });
+
+  const selectNode = useCallback((node: GraphNode | null) => {
+    if (node) {
+      setSelection({
+        type: "node",
+        id: node.id,
+        node,
+        edge: undefined,
+      });
+    } else {
+      setSelection({
+        type: null,
+        id: null,
+        node: undefined,
+        edge: undefined,
+      });
+    }
+  }, []);
+
+  const selectEdge = useCallback((edge: GraphEdge | null) => {
+    if (edge) {
+      setSelection({
+        type: "edge",
+        id: edge.id,
+        node: undefined,
+        edge,
+      });
+    } else {
+      setSelection({
+        type: null,
+        id: null,
+        node: undefined,
+        edge: undefined,
+      });
+    }
+  }, []);
+
+  const clearSelection = useCallback(() => {
+    setSelection({
+      type: null,
+      id: null,
+      node: undefined,
+      edge: undefined,
+    });
+  }, []);
+
+  const isNodeSelected = useCallback(
+    (nodeId: string) => selection.type === "node" && selection.id === nodeId,
+    [selection]
+  );
+
+  const isEdgeSelected = useCallback(
+    (edgeId: string) => selection.type === "edge" && selection.id === edgeId,
+    [selection]
+  );
+
+  const selectedNode = useMemo(
+    () => (selection.type === "node" ? (selection.node ?? null) : null),
+    [selection]
+  );
+
+  const selectedEdge = useMemo(
+    () => (selection.type === "edge" ? (selection.edge ?? null) : null),
+    [selection]
+  );
+
+  return {
+    selection,
+    selectedNode,
+    selectedEdge,
+    selectNode,
+    selectEdge,
+    clearSelection,
+    isNodeSelected,
+    isEdgeSelected,
+  };
+}