/** @typedef {import('koa').Context} Context */
/** @typedef {import('koa').Next} Next */

/**
 * Middleware function to check if user is logged in.
 * @param {Context} ctx - Koa context object.
 * @param {Next} next - Next middleware function.
 */
export function loginRequired(ctx, next) {
    if (ctx.state.user == null) {
        ctx.status = 401; // 401 (Unauthorized)
    } else {
        return next();
    }
}