NapCatQQ/src/common/coerce.ts

import { z } from 'zod';

const boolean = () => z.preprocess(
    val => val === null || val === undefined
        ? val
        : typeof val === 'string' && (val.toLowerCase() === 'false' || val === '0')
            ? false
            : Boolean(val),
    z.boolean()
);

const number = () => z.preprocess(
    val => val === null || val === undefined
        ? val
        : typeof val !== 'number' ? Number(val) : val,
    z.number()
);

const string = () => z.preprocess(
    val => val === null || val === undefined
        ? val
        : typeof val !== 'string' ? String(val) : val,
    z.string()
);

export const coerce = { boolean, number, string };