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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { primordials } from "ext:core/mod.js";
import Dirent from "ext:deno_node/_fs/_fs_dirent.ts";
import { assert } from "ext:deno_node/_util/asserts.ts";
import { ERR_MISSING_ARGS } from "ext:deno_node/internal/errors.ts";
import { TextDecoder } from "ext:deno_web/08_text_encoding.js";
const {
Promise,
ObjectPrototypeIsPrototypeOf,
Uint8ArrayPrototype,
PromisePrototypeThen,
SymbolAsyncIterator,
ArrayIteratorPrototypeNext,
AsyncGeneratorPrototypeNext,
SymbolIterator,
} = primordials;
export default class Dir {
#dirPath: string | Uint8Array;
#syncIterator!: Iterator<Deno.DirEntry, undefined> | null;
#asyncIterator!: AsyncIterator<Deno.DirEntry, undefined> | null;
constructor(path: string | Uint8Array) {
if (!path) {
throw new ERR_MISSING_ARGS("path");
}
this.#dirPath = path;
}
get path(): string {
if (ObjectPrototypeIsPrototypeOf(Uint8ArrayPrototype, this.#dirPath)) {
return new TextDecoder().decode(this.#dirPath);
}
return this.#dirPath;
}
// deno-lint-ignore 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)[SymbolAsyncIterator]();
}
assert(this.#asyncIterator);
PromisePrototypeThen(
AsyncGeneratorPrototypeNext(this.#asyncIterator),
(iteratorResult) => {
resolve(
iteratorResult.done ? null : new Dirent(iteratorResult.value),
);
if (callback) {
callback(
null,
iteratorResult.done ? null : new Dirent(iteratorResult.value),
);
}
},
(err) => {
if (callback) {
callback(err);
}
reject(err);
},
);
});
}
readSync(): Dirent | null {
if (!this.#syncIterator) {
this.#syncIterator = Deno.readDirSync(this.path)![SymbolIterator]();
}
const iteratorResult = ArrayIteratorPrototypeNext(this.#syncIterator);
if (iteratorResult.done) {
return null;
} else {
return new Dirent(iteratorResult.value);
}
}
/**
* Unlike Node, Deno does not require managing resource ids for reading
* directories, and therefore does not need to close directories when
* finished reading.
*/
// deno-lint-ignore no-explicit-any
close(callback?: (...args: any[]) => void): Promise<void> {
return new Promise((resolve) => {
if (callback) {
callback(null);
}
resolve();
});
}
/**
* Unlike Node, Deno does not require managing resource ids for reading
* directories, and therefore does not need to close directories when
* finished reading
*/
closeSync() {
//No op
}
async *[SymbolAsyncIterator](): 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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