Function buildSubTree

frontend/src/react/stores/sqlEditor/tree-utils.ts:39–66

(
  databaseList: Database[],
  parent: TreeNode | undefined,
  factorList: Factor[],
  factorIndex: number
)

};

const buildSubTree = (
  databaseList: Database[],
  parent: TreeNode | undefined,
  factorList: Factor[],
  factorIndex: number
): TreeNode[] => {
  if (factorIndex === factorList.length) {
    return databaseList.map((db) => mapTreeNodeByType("database", db, parent));
  }

  const nodes: TreeNode[] = [];
  const factor = factorList[factorIndex];

  const groups = groupBy(databaseList, (db) =>
    getSemanticFactorValue(db, factor)
  );
  for (const [value, childrenDatabaseList] of groups) {
    const groupNode = mapGroupNode(factor, value, parent);
    groupNode.children = buildSubTree(
      childrenDatabaseList,
      groupNode,
      factorList,
      factorIndex + 1
    );
    nodes.push(groupNode);
  }
  return sortNodesIfNeeded(nodes, factor);
};

const sortNodesIfNeeded = (nodes: TreeNode[], factor: Factor) => {
  if (factor === "environment") {