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denoland-deno/js/read_dir.ts

46 lines
1.5 KiB
TypeScript

// Copyright 2018 the Deno authors. All rights reserved. MIT license.
import * as msg from "gen/msg_generated";
import * as flatbuffers from "./flatbuffers";
import * as dispatch from "./dispatch";
import { FileInfo, FileInfoImpl } from "./file_info";
import { assert } from "./util";
/** Reads the directory given by path and returns a list of file info
* synchronously.
*
* import { readDirSync } from "deno";
* const files = readDirSync("/");
*/
export function readDirSync(path: string): FileInfo[] {
return res(dispatch.sendSync(...req(path)));
}
/** Reads the directory given by path and returns a list of file info.
*
* import { readDir } from "deno";
* const files = await readDir("/");
*/
export async function readDir(path: string): Promise<FileInfo[]> {
return res(await dispatch.sendAsync(...req(path)));
}
function req(path: string): [flatbuffers.Builder, msg.Any, flatbuffers.Offset] {
const builder = flatbuffers.createBuilder();
const path_ = builder.createString(path);
msg.ReadDir.startReadDir(builder);
msg.ReadDir.addPath(builder, path_);
const inner = msg.ReadDir.endReadDir(builder);
return [builder, msg.Any.ReadDir, inner];
}
function res(baseRes: null | msg.Base): FileInfo[] {
assert(baseRes != null);
assert(msg.Any.ReadDirRes === baseRes!.innerType());
const res = new msg.ReadDirRes();
assert(baseRes!.inner(res) != null);
const fileInfos: FileInfo[] = [];
for (let i = 0; i < res.entriesLength(); i++) {
fileInfos.push(new FileInfoImpl(res.entries(i)!));
}
return fileInfos;
}