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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import Dirent from "./_fs_dirent.ts";
import { assert } from "../../_util/assert.ts";
export default class Dir {
private dirPath: string | Uint8Array;
private syncIterator!: Iterator<Deno.DirEntry> | null;
private asyncIterator!: AsyncIterator<Deno.DirEntry> | null;
constructor(path: string | Uint8Array) {
this.dirPath = path;
}
get path(): string {
if (this.dirPath instanceof Uint8Array) {
return new TextDecoder().decode(this.dirPath);
}
return this.dirPath;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
read(callback?: (...args: any[]) => void): Promise<Dirent | null> {
return new Promise((resolve, reject) => {
if (!this.asyncIterator) {
this.asyncIterator = Deno.readDir(this.path)[Symbol.asyncIterator]();
}
assert(this.asyncIterator);
this.asyncIterator
.next()
.then(({ value }) => {
resolve(value ? value : null);
if (callback) {
callback(null, value ? value : null);
}
})
.catch((err) => {
if (callback) {
callback(err, null);
}
reject(err);
});
});
}
readSync(): Dirent | null {
if (!this.syncIterator) {
this.syncIterator = Deno.readDirSync(this.path)![Symbol.iterator]();
}
const file: Deno.DirEntry = this.syncIterator.next().value;
return file ? new Dirent(file) : null;
}
/**
* Unlike Node, Deno does not require managing resource ids for reading
* directories, and therefore does not need to close directories when
* finished reading.
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
close(callback?: (...args: any[]) => void): Promise<void> {
return new Promise((resolve, reject) => {
try {
if (callback) {
callback(null);
}
resolve();
} catch (err) {
if (callback) {
callback(err);
}
reject(err);
}
});
}
/**
* Unlike Node, Deno does not require managing resource ids for reading
* directories, and therefore does not need to close directories when
* finished reading
*/
closeSync(): void {
//No op
}
async *[Symbol.asyncIterator](): AsyncIterableIterator<Dirent> {
try {
while (true) {
const dirent: Dirent | null = await this.read();
if (dirent === null) {
break;
}
yield dirent;
}
} finally {
await this.close();
}
}
}
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