using System;

​

// Evaluate the design and explain what are the problems with this design

// Refactor code using object oriented principles

// Make the design sophisticated so that new pages types can be introduced easily and indexing logc can be extended for them  

namespace CodeRefactoringTest

{

    public class Program

    {

        public static void Main(string[] args)

        {

​

            Page contentPage = new Page();

            contentPage.Title = "About LeasePlan";

            contentPage.PublishedDate = DateTime.Now.AddDays(-2);

            contentPage.pageType = "contentPage";

​

​

            Page newsPage = new Page();

            newsPage.Title = "Electric vehicles Sales are increasing";

            newsPage.PublishedDate = DateTime.Now.AddDays(-2);

            newsPage.pageType = "newsArticlePage";

            newsPage.NewsArticleGoLiveDate = DateTime.Now.AddDays(-2);

​

​

            Page vehiclePage = new Page();

            vehiclePage.Title = "tesla Model 3";

            vehiclePage.PublishedDate = DateTime.Now.AddDays(-2);

            vehiclePage.pageType = "vehiclePage";

            vehiclePage.IsVehicleLaunched = true;

​

            Console.WriteLine("Indexing starting");

​

            IndexUpdater indexUpdater = new IndexUpdater();

            indexUpdater.AddToIndex(contentPage);

            indexUpdater.AddToIndex(newsPage);

            indexUpdater.AddToIndex(vehiclePage);

​

​

            Console.WriteLine("indexing finished");

​

        }

​

        /* 

         * A page can be contentPage, newsArticlePage,  or VehiclePage. pageType property will determine what type of page it is

         * Evry page type will have Title and Published Date properties

         * NewsArticleGoLiveDate is applicable only for NewsArticle page type

         * IsVehicleLaunched is applicable only for VehiclePage

        */

        public class Page

        {

            public string pageType { get; set; }

​

            public string Title { get; set; }

            public DateTime PublishedDate { get; set; }

​

            //the date in which the article has to be live

            public DateTime NewsArticleGoLiveDate { get; set; }

​

            //determines if the vahicle is launched in the market or not

            public bool IsVehicleLaunched { get; set; }

        }

​

        /*

         * Index Updater is used to add all types of pages to Search Index 

         *

         */

        public class IndexUpdater

        {

            public bool AddToIndex(Page page)

            {

                //the following check needs to be strictly done for every page types

                if (string.IsNullOrEmpty(page.Title) ||  page.PublishedDate  >= DateTime.Now)

                {

                    return false;

                }

​

                if (page.pageType == "newsArticlePage")

                {

                    if (page.NewsArticleGoLiveDate >= DateTime.Now)

                    {

                        return false;

                    }

                }

​

                if (page.pageType == "vehiclePage")

                {

                    if (!page.IsVehicleLaunched)

                    {

                        return false;

                    }

                }

​

                // the following code is generic for all types of pages

                AddtoSolrIndex();

​

                return true;

            }

​

            public void AddtoSolrIndex()

            {

                //code to call SOLR and add the page goes here. this method implementation is same for all types of pages

​

            }

        }

    }  

​

}

​