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import { existsSync } from "../../fs/mod.ts";
import { fromFileUrl } from "../path.ts";
import { getOpenOptions } from "./_fs_common.ts";
type openFlags =
| "a"
| "ax"
| "a+"
| "ax+"
| "as"
| "as+"
| "r"
| "r+"
| "rs+"
| "w"
| "wx"
| "w+"
| "wx+";
type openCallback = (err: Error | null, fd: number) => void;
function convertFlagAndModeToOptions(
flag?: openFlags,
mode?: number,
): Deno.OpenOptions | undefined {
if (!flag && !mode) return undefined;
if (!flag && mode) return { mode };
return { ...getOpenOptions(flag), mode };
}
export function open(path: string | URL, callback: openCallback): void;
export function open(
path: string | URL,
flags: openFlags,
callback: openCallback,
): void;
export function open(
path: string | URL,
flags: openFlags,
mode: number,
callback: openCallback,
): void;
export function open(
path: string | URL,
flagsOrCallback: openCallback | openFlags,
callbackOrMode?: openCallback | number,
maybeCallback?: openCallback,
) {
const flags = typeof flagsOrCallback === "string"
? flagsOrCallback
: undefined;
const callback = typeof flagsOrCallback === "function"
? flagsOrCallback
: typeof callbackOrMode === "function"
? callbackOrMode
: maybeCallback;
const mode = typeof callbackOrMode === "number" ? callbackOrMode : undefined;
path = path instanceof URL ? fromFileUrl(path) : path;
if (!callback) throw new Error("No callback function supplied");
if (["ax", "ax+", "wx", "wx+"].includes(flags || "") && existsSync(path)) {
const err = new Error(`EEXIST: file already exists, open '${path}'`);
(callback as (err: Error) => void)(err);
} else {
if (flags === "as" || flags === "as+") {
let err: Error | null = null, res: number;
try {
res = openSync(path, flags, mode);
} catch (error) {
err = error;
}
if (err) {
(callback as (err: Error) => void)(err);
} else {
callback(null, res!);
}
return;
}
Deno.open(path, convertFlagAndModeToOptions(flags, mode)).then(
(file) => callback(null, file.rid),
(err) => (callback as (err: Error) => void)(err),
);
}
}
export function openSync(path: string | URL): number;
export function openSync(path: string | URL, flags?: openFlags): number;
export function openSync(path: string | URL, mode?: number): number;
export function openSync(
path: string | URL,
flags?: openFlags,
mode?: number,
): number;
export function openSync(
path: string | URL,
flagsOrMode?: openFlags | number,
maybeMode?: number,
) {
const flags = typeof flagsOrMode === "string" ? flagsOrMode : undefined;
const mode = typeof flagsOrMode === "number" ? flagsOrMode : maybeMode;
path = path instanceof URL ? fromFileUrl(path) : path;
if (["ax", "ax+", "wx", "wx+"].includes(flags || "") && existsSync(path)) {
throw new Error(`EEXIST: file already exists, open '${path}'`);
}
return Deno.openSync(path, convertFlagAndModeToOptions(flags, mode)).rid;
}
|
