helpers.js

const path = require('path');
const autoBind = require('auto-bind');
const moment = require('moment-jalaali');
moment.loadPersian({usePersianDigits: true})

module.exports = class Helpers {
    
    constructor(req , res) {
        autoBind(this);
        this.req = req;
        this.res = res;
        this.formData = req.flash('formData')[0];
    }

    getObjects() {        
        return {
            auth : this.auth(),
            viewPath : this.viewPath,
            ...this.getGlobalVaribales(),
            old : this.old,
            date : this.date,
            req : this.req
        }
    }

    auth() {
        return {
            check : this.req.isAuthenticated(),
            user : this.req.user
        }
    }

    viewPath(dir) {
        return path.resolve(config.layout.view_dir + '/' + dir);
    }

    getGlobalVaribales() {
        return {
            errors : this.req.flash('errors')
        }
    }

    old(field , defaultValue = '') {
        return this.formData && this.formData.hasOwnProperty(field) ? this.formData[field] : defaultValue;
    }

    date(time) {
        return moment(time);
    }
}