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import * as directory from "../../misc/directory.ts";
export interface Index {  filePath: string;  importAllFroms: { as: string; from: string }[];  exportTypes: string[];  reExportTypes: { item: string; as: string; from: string }[];}export interface IndexBuffer {  reExport(from: string, item: string, as: string): void;  [Symbol.iterator](): Generator<Index>;}export interface CreateIndexBufferConfig {  indexFilename?: string;}export function createIndexBuffer(  config?: CreateIndexBufferConfig,): IndexBuffer {  interface Items {    [as: string]: string;  }  let root: directory.Folder<Items> = directory.empty;  const indexFilename = config?.indexFilename || "index";  return {    reExport(from, item, as) {      const path = directory.textToPath(from);      const items = directory.get(root, path)?.value;      root = directory.set(root, path, { ...items, [item]: as });    },    *[Symbol.iterator]() {      for (const [path, folder] of directory.walkFolders(root)) {        const entries = Object.entries(folder.children);        const folders = entries.filter(          ([name, node]) => !name.startsWith("(") && !node.value,        );        const files = entries.filter(([, node]) => node.value);        yield {          filePath: [...path, `${indexFilename}.ts`].join("/"),          importAllFroms: folders.map(            ([name]) => ({ as: name, from: `./${name}/${indexFilename}.ts` }),          ),          exportTypes: folders.map(([name]) => name),          reExportTypes: files.flatMap(            ([name, { value }]) =>              Object.entries(value!).map(                ([item, as]) => ({ item, as, from: `./${name}.ts` }),              ),          ),        };      }    },  };}