import { Context, Middleware } from 'koa';
import { GatekeeperUser } from '../types/GatekeeperUser';

declare module 'koa' {
    interface ExtendableContext {
        user: GatekeeperUser | null;
        isAuthenticated(): boolean;
        isUnauthenticated(): boolean;
        logout(): void;
    }
}

const isAuthenticated = function (this: Context) {
    return !!this.user;
};

const isUnauthenticated = function (this: Context) {
    return !this.user;
};

const logout = function (this: Context) {
    this.user = null;
};

export const initialize: Middleware = (ctx) => {
    ctx.user = null;
    ctx.isAuthenticated = isAuthenticated.bind(ctx);
    ctx.isUnauthenticated = isUnauthenticated.bind(ctx);
    ctx.logout = logout.bind(ctx);
};