pigallery2/backend/middlewares/user/AuthenticationMWs.ts

///<reference path="../customtypings/ExtendedRequest.d.ts"/>
///<reference path="../../../typings/index.d.ts"/>

import {NextFunction, Request, Response} from "express";
import {Error, ErrorCodes} from "../../../common/entities/Error";
import {UserRoles} from "../../../common/entities/User";
import {ObjectManagerRepository} from "../../model/ObjectManagerRepository";

export class AuthenticationMWs {

    public static authenticate(req:Request, res:Response, next:NextFunction) {
        if (typeof req.session.user === 'undefined') {
            return next(new Error(ErrorCodes.NOT_AUTHENTICATED));
        } 
        return next();
    }

    public static authorise(role:UserRoles) {
        return (req:Request, res:Response, next:NextFunction) => {
            if (req.session.user.role < role) {
                return next(new Error(ErrorCodes.NOT_AUTHORISED));
            }
            return next();
        };
    }

    public static inverseAuthenticate(req:Request, res:Response, next:NextFunction) {
        if (typeof req.session.user !== 'undefined') {
            return next(new Error(ErrorCodes.ALREADY_AUTHENTICATED));
        }
        return next();
    }

    public static login(req:Request, res:Response, next:NextFunction) {
        //not enough parameter
        if ((typeof req.body === 'undefined') || (typeof req.body.loginCredential === 'undefined') || (typeof req.body.loginCredential.username === 'undefined') ||
            (typeof req.body.loginCredential.password === 'undefined')) {
            return next();
        }

        //lets find the user
        ObjectManagerRepository.getInstance().getUserManager().findOne({
            name: req.body.loginCredential.username,
            password: req.body.loginCredential.password
        }, (err, result) => {
            if ((err) || (!result)) {
                return next(new Error(ErrorCodes.CREDENTIAL_NOT_FOUND));
            }


            req.session.user = result;

            return next();
        });
    }

    public static logout(req:Request, res:Response, next:NextFunction) {
        delete req.session.user;
        return next();
    }

}