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import { useCallback, useEffect, useState } from 'react';
import * as fs from 'fs';
export function usePromise<T>(f: () => Promise<T>): T | null {
const [value, setValue] = useState<T | null>(null);
useEffect(() => {
setValue(null);
let cancelled = false;
(async (): Promise<void> => {
const v = await f();
if (!cancelled) {
setValue(v);
}
})();
return (): void => {
cancelled = true;
};
}, [f]);
return value;
}
export function useReadFile(path: string): Buffer | null {
const readFile = useCallback(() => fs.promises.readFile(path), [path]);
return usePromise(readFile);
}
export async function readJSON(path: string): Promise<unknown> {
const content = await fs.promises.readFile(path, 'utf8');
return JSON.parse(content);
}
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