blog/lib/rx-utils.ts

41 lines
1.3 KiB
TypeScript

import { Observable, Subscriber } from "rxjs";
import File from "vinyl";
import { readFile } from "node:fs/promises";
import { join, dirname } from "node:path";
import { existsSync } from "node:fs";
import { writeFile, mkdir } from "node:fs/promises";
export function dest(prefix: string) {
return async (file: File) => {
const actualPath = join(prefix, file.path);
if (!existsSync(dirname(actualPath))) {
await mkdir(dirname(actualPath), { recursive: true });
}
await writeFile(actualPath, file.contents as Buffer);
console.log("[-] Written", actualPath);
return file;
};
}
export const loadFile = async (path: string): Promise<File> =>
new File({ path, contents: await readFile(path) });
export function onComplete<T>(f: (sink: Subscriber<T>) => Promise<void>) {
return (observable: Observable<T>) =>
new Observable<T>((subscriber) =>
observable.subscribe({
next(value) {
subscriber.next(value);
},
error(err) {
subscriber.error(err);
},
complete() {
f(subscriber);
subscriber.complete();
},
}),
);
}