// 示例伪代码
function signIn(userId) {
const today = new Date().toISOString().split('T')[0]; // 获取今天的日期
const record = db.find({ userId: userId, date: today });
if (!record) {
db.insert({ userId: userId, date: today, status: 'signed' });
return '签到成功';
} else {
return '您今天已经签到过了';
}
}
