SearchResultsViewController.cs

using Foundation;
using System;
using UIKit;
using CoreGraphics;
using System.Collections.Generic;
using AircraftForSale.PCL;
using AircraftForSale.PCL.Helpers;
using SDWebImage;
using System.Linq;
using Google.Analytics;

namespace AircraftForSale
{
    public partial class SearchResultsViewController : UIViewController, IUISearchResultsUpdating
    {

        public List<Ad> SearchResultsAdList
        {
            get;
            set;
        }

        public string Classification
        {
            get;
            set;
        }



        public UITableView SearchResultsTableView
        {
            get;
            set;
        }

        public UISearchController searchController;
        public SearchResultsViewController()
        {
            //this.AdSelectedAction = addSelectedAction;
        }

        
        public Ad SelectedAd
        {
            get;
            set;
        }

        public Action AdSelectedAction
        {
            get;
            set;
        }

        public override void ViewDidAppear(bool animated)
        {
            base.ViewDidAppear(animated);

            // This screen name value will remain set on the tracker and sent with
            // hits until it is set to a new value or to null.
            Gai.SharedInstance.DefaultTracker.Set(GaiConstants.ScreenName, "SearchResults View");

            Gai.SharedInstance.DefaultTracker.Send(DictionaryBuilder.CreateScreenView().Build());
        }
        //~SearchResultsViewController()
        //{
        //  Console.WriteLine("SearchResultsViewController is about to be garbage collected");
        //}

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            var titleString = "";
            if (Classification != null)
            {
                titleString = Classification + " " + "Search";
            }
            else
            {

                titleString = "Aircraft Search";
            }

            View.BackgroundColor = UIColor.Black;

            var statusBarHeight = UIApplication.SharedApplication.StatusBarFrame.Height;

            var closeButton = new UIButton(new CGRect(View.Bounds.Width - 110, statusBarHeight, 100, 25));
            closeButton.SetTitle("Close", UIControlState.Normal);
            closeButton.SetTitleColor(UIColor.White, UIControlState.Normal);

            View.Add(closeButton);


            //var titleView = new UITextView(titleRect);






            var tableViewYValue = statusBarHeight + (closeButton.Bounds.Height + 5);
            var tableViewHeight = this.View.Bounds.Height - tableViewYValue;


            SearchResultsTableView = new UITableView(new CGRect(0, tableViewYValue, this.View.Bounds.Width, tableViewHeight));

            var backgroundImage = UIImage.FromBundle("new_home_bg1.png").ResizeImage((float)this.View.Bounds.Width, (float)this.View.Bounds.Height);
            //SearchResultsTableView.BackgroundColor = UIColor.FromPatternImage(backgroundImage);
            //var imageView = new UIImageView()
            this.View.BackgroundColor = UIColor.FromPatternImage(backgroundImage);
            SearchResultsTableView.BackgroundColor = UIColor.Clear;

            View.Add(SearchResultsTableView);

            searchController = new UISearchController((UIViewController)null);

            searchController.DimsBackgroundDuringPresentation = false;

            SearchResultsTableView.TableHeaderView = searchController.SearchBar;
            searchController.SearchBar.SizeToFit();

            this.DefinesPresentationContext = true;

            searchController.SearchResultsUpdater = this;

            var titleViewHeight = this.View.Bounds.Height - (this.SearchResultsTableView.Bounds.Height);
            var titleView = new UITextView(new CGRect(0, 0, this.View.Bounds.Width * .4f, titleViewHeight));

            titleView.Center = new CGPoint(View.Frame.Size.Width / 2, titleViewHeight / 1.8f);

            titleView.Text = titleString;
            titleView.TextAlignment = UITextAlignment.Center;
            titleView.TextColor = UIColor.White;
            titleView.BackgroundColor = UIColor.Clear;
            titleView.Font = UIFont.BoldSystemFontOfSize(UIKit.UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone ? 15f : 20f);
            titleView.AdjustsFontForContentSizeCategory = true;


            this.View.Add(titleView);

            closeButton.TouchUpInside += (sender, e) =>
            {
                this.DismissViewController(true, null);
            };

            SearchResultsTableView.Source = new SearchResultsTableSource(this);

        }


        public List<Ad> filteredAds { get; set; }

        public void UpdateSearchResultsForSearchController(UISearchController searchController)
        {
            if (searchController.Active)
                filteredAds = new List<Ad>();
            else
                filteredAds = null;

            var textToSearchFor = searchController.SearchBar.Text;
            var index = searchController.SearchBar.SelectedScopeButtonIndex;




            FilterContentForSearchText(searchController.SearchBar.Text);
        }

        void FilterContentForSearchText(string text)
        {
            //InvokeOnMainThread(() =>
            //{
            if (filteredAds != null)
            {
                filteredAds.Clear();
                filteredAds.AddRange(
                        this.SearchResultsAdList.Where(e =>
                                        (string.IsNullOrWhiteSpace(text) || e.Name.ToUpper().Contains(text.ToUpper()))
                         ));
            }

            SearchResultsTableView.ReloadData();
            //}
        }

    }



    public class SearchResultsTableSource : UITableViewSource
    {
       

        WeakReference parent;
        public SearchResultsViewController Owner
        {
            get
            {
                return parent.Target as SearchResultsViewController;
            }
            set
            {
                parent = new WeakReference(value);
            }
        }

        NSString CellIdentifier = (NSString)"searchResultsPrototypeCell";

        public SearchResultsTableSource(SearchResultsViewController owner)
        {
            Owner = owner;
        }

        public override nint RowsInSection(UITableView tableview, nint section)
        {
            if (Owner.filteredAds != null)
                return Owner.filteredAds.Count;

            return Owner.SearchResultsAdList.Count;
        }

        public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
        {

            UITableViewCell cell = tableView.DequeueReusableCell(CellIdentifier);

            if (cell == null)
            {

                cell = new UITableViewCell(UITableViewCellStyle.Subtitle, CellIdentifier);
                cell.Accessory = UITableViewCellAccessory.DisclosureIndicator;
                var backgroundColor = UIColor.FromWhiteAlpha(1f, .3f);
                cell.BackgroundColor = backgroundColor;
            }




            //Ad ad = Owner.SearchResultsAdList[indexPath.Row];

            Ad ad = (Owner.filteredAds != null)
                ? Owner.filteredAds[indexPath.Row]
                : Owner.SearchResultsAdList[indexPath.Row];

            //cell.UpdateCell(item, this);
            cell.TextLabel.Text = ad.Name;
            cell.DetailTextLabel.Text = ad.Teaser;

            var image = SDImageCache.SharedImageCache.ImageFromDiskCache(ad.ImageURL);

           // var image = HelperMethods.GetImageFromCacheOrDefault(ad.ImageURL);



            if (image == null)
            {
                try
                {
                    image = HelperMethods.FromUrl(ad.ImageURL);

                }catch(Exception e)
                {
                    image = UIImage.FromBundle("ad_placeholder.jpg");
                }
            }
           var maxWidth = UIKit.UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone ? 100f : 150f;
               
         image = image.MaxResizeImage(maxWidth, maxWidth);

           cell.ImageView.Image = image;


            return cell;
        }

        public override nfloat GetHeightForRow(UITableView tableView, NSIndexPath indexPath)
        {
            var maxWidth = UIKit.UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone ? 100f : 150f;
            return maxWidth;
        }

        public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
        {

            var cell = tableView.CellAt(indexPath);

            Ad ad = (Owner.filteredAds != null)
                ? Owner.filteredAds[indexPath.Row]
                : Owner.SearchResultsAdList[indexPath.Row];

            if (Owner.searchController.Active)
            {
                Owner.searchController.DismissViewController(true, null);
            }

            Owner.SelectedAd = ad;

            if (Owner.AdSelectedAction != null)
            {
                Owner.AdSelectedAction.Invoke();
            }

            Owner.DismissViewController(true, null);


            tableView.DeselectRow(indexPath, true);
        }


    }

}