123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960
import { StringReader } from "https://deno.land/std@0.122.0/io/mod.ts";import { CodeEntry } from "../index.ts";import * as directory from "../../misc/directory.ts";
export interface IndexBuffer {  reExport(from: string, item: string, as: string): void;  [Symbol.iterator](): Generator<CodeEntry>;}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";  const folderEntryToImportStmt = ([name]: [string, unknown]) => {    return `import * as ${name} from "./${name}/${indexFilename}.ts";\n`;  };  return {    reExport(from, item, as) {      const path = directory.textToPath(from);      const items = directory.get(root, path)?.value;      root = directory.set(root, path, { ...items, [item]: as });    },    *[Symbol.iterator]() {      for (const [path, folder] of directory.walkFolders(root)) {        const entries = Object.entries(folder.children);        const folders = entries.filter(          ([name, node]) => !name.startsWith("(") && !node.value,        );        const files = entries.filter(([, node]) => node.value);        const codes = [          ...folders.map(folderEntryToImportStmt),          folders.length            ? `export type {\n${              folders.map(([name]) => `  ${name},\n`).join("")            }};\n`            : "",          ...files.flatMap(            ([name, { value }]) =>              Object.entries(value!).map(                ([item, as]) => (                  `export type { ${item} as ${as} } from "./${name}.ts";\n`                ),              ),          ),        ];        yield [          [...path, `${indexFilename}.ts`].join("/"),          new StringReader(codes.join("")),        ];      }    },  };}