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denoland-deno/std/node/_utils.ts
2019-11-12 15:51:14 -05:00

35 lines
1.2 KiB
TypeScript

export function notImplemented(msg?: string): never {
const message = msg ? `Not implemented: ${msg}` : "Not implemented";
throw new Error(message);
}
// API helpers
export type MaybeNull<T> = T | null;
export type MaybeDefined<T> = T | undefined;
export type MaybeEmpty<T> = T | null | undefined;
export function intoCallbackAPI<T>(
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
func: (...args: any[]) => Promise<T>,
cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T>) => void>,
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
...args: any[]
): void {
func(...args)
.then(value => cb && cb(null, value))
.catch(err => cb && cb(err, null));
}
export function intoCallbackAPIWithIntercept<T1, T2>(
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
func: (...args: any[]) => Promise<T1>,
interceptor: (v: T1) => T2,
cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T2>) => void>,
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
...args: any[]
): void {
func(...args)
.then(value => cb && cb(null, interceptor(value)))
.catch(err => cb && cb(err, null));
}