Function getGroupAtPath

frontend/src/react/components/ExprEditor.tsx:140–153

(
  root: ConditionGroupExpr,
  path: Path
)

type Path = number[];

function getGroupAtPath(
  root: ConditionGroupExpr,
  path: Path
): ConditionGroupExpr {
  let node: ConditionGroupExpr = root;
  for (const idx of path) {
    const child = node.args[idx];
    if (!child || child.type !== ExprType.ConditionGroup) {
      throw new Error("Invalid path");
    }
    node = child;
  }
  return node;
}

function useImmutableUpdate(groupPath: Path) {
  const { root, onUpdate } = useExprEditorCtx();