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import { asyncIterableToCallback } from "./_fs_watch.ts";
import Dirent from "./_fs_dirent.ts";
import { fromFileUrl } from "../path.ts";
function toDirent(val: Deno.DirEntry): Dirent {
return new Dirent(val);
}
type readDirOptions = {
encoding?: string;
withFileTypes?: boolean;
};
type readDirCallback = (err: Error | undefined, files: string[]) => void;
type readDirCallbackDirent = (err: Error | undefined, files: Dirent[]) => void;
type readDirBoth = (
err: Error | undefined,
files: string[] | Dirent[] | Array<string | Dirent>,
) => void;
export function readdir(
path: string | URL,
options: { withFileTypes?: false; encoding?: string },
callback: readDirCallback,
): void;
export function readdir(
path: string | URL,
options: { withFileTypes: true; encoding?: string },
callback: readDirCallbackDirent,
): void;
export function readdir(path: string | URL, callback: readDirCallback): void;
export function readdir(
path: string | URL,
optionsOrCallback: readDirOptions | readDirCallback | readDirCallbackDirent,
maybeCallback?: readDirCallback | readDirCallbackDirent,
) {
const callback =
(typeof optionsOrCallback === "function"
? optionsOrCallback
: maybeCallback) as readDirBoth | undefined;
const options = typeof optionsOrCallback === "object"
? optionsOrCallback
: null;
const result: Array<string | Dirent> = [];
path = path instanceof URL ? fromFileUrl(path) : path;
if (!callback) throw new Error("No callback function supplied");
if (options?.encoding) {
try {
new TextDecoder(options.encoding);
} catch (error) {
throw new Error(
`TypeError [ERR_INVALID_OPT_VALUE_ENCODING]: The value "${options.encoding}" is invalid for option "encoding"`,
);
}
}
try {
asyncIterableToCallback(Deno.readDir(path), (val, done) => {
if (typeof path !== "string") return;
if (done) {
callback(undefined, result);
return;
}
if (options?.withFileTypes) {
result.push(toDirent(val));
} else result.push(decode(val.name));
});
} catch (error) {
callback(error, result);
}
}
function decode(str: string, encoding?: string): string {
if (!encoding) return str;
else {
const decoder = new TextDecoder(encoding);
const encoder = new TextEncoder();
return decoder.decode(encoder.encode(str));
}
}
export function readdirSync(
path: string | URL,
options: { withFileTypes: true; encoding?: string },
): Dirent[];
export function readdirSync(
path: string | URL,
options?: { withFileTypes?: false; encoding?: string },
): string[];
export function readdirSync(
path: string | URL,
options?: readDirOptions,
): Array<string | Dirent> {
const result = [];
path = path instanceof URL ? fromFileUrl(path) : path;
if (options?.encoding) {
try {
new TextDecoder(options.encoding);
} catch (error) {
throw new Error(
`TypeError [ERR_INVALID_OPT_VALUE_ENCODING]: The value "${options.encoding}" is invalid for option "encoding"`,
);
}
}
for (const file of Deno.readDirSync(path)) {
if (options?.withFileTypes) {
result.push(toDirent(file));
} else result.push(decode(file.name));
}
return result;
}
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