ContactOverViewViewController

using System;
using System.Drawing;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using System.Collections.Generic;
using System.Linq;

namespace Planning
{
    public partial class ContactOverviewViewController : UIViewController
    {
        #region private members
        private DataAccessController dataController;

        private List<Contact> contacts, filteredContacts;
        private UITableView tableContacts;

        private UISearchBar searchBar;
        #endregion

        #region constructor and properties
        public ContactOverviewViewController () : base ("ContactOverviewViewController", null)
        {
            dataController = new DataAccessController (AppDelegate.UserID);
        }

        static bool UserInterfaceIdiomIsPhone
        {
            get
            {
                return UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone;
            }
        }
        #endregion

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

            contacts = AppDelegate.ContactList;
            filteredContacts = new List<Contact> ();
        }

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

            searchBar = new UISearchBar ();
            searchBar.Placeholder = "Zoek contact.";
            searchBar.SizeToFit ();
            searchBar.ShowsCancelButton = true;
            searchBar.AutocorrectionType = UITextAutocorrectionType.No;
            searchBar.AutocapitalizationType = UITextAutocapitalizationType.Words;
            searchBar.TextChanged += (object sender, UISearchBarTextChangedEventArgs e) =>
            {
                SearchContact (searchBar.Text);
            };

            searchBar.CancelButtonClicked += (sender, e) =>
            {
                searchBar.Text = "";
                SearchContact (searchBar.Text);
                searchBar.ResignFirstResponder();
            };

            searchBar.SearchButtonClicked += (sender, e) =>
            {
                if (filteredContacts.Count() == 0)
                {
                    SearchClicked();
                }

                searchBar.ResignFirstResponder();
            };

            tableContacts = new UITableView (new RectangleF (0, 0, AppDelegate.ScreenWidth, AppDelegate.ScreenHeight));
            tableContacts.Bounces = true;
            tableContacts.ScrollEnabled = true;
            tableContacts.SeparatorStyle = UITableViewCellSeparatorStyle.SingleLine;
            tableContacts.SeparatorColor = UIColor.DarkGray;

            this.View.AddSubview (tableContacts);

            tableContacts.TableHeaderView = searchBar;

            CreateNavigationBar ();
        }

        public override void WillRotate (UIInterfaceOrientation toInterfaceOrientation, double duration)
        {
            base.WillRotate (toInterfaceOrientation, duration);

            if (toInterfaceOrientation == UIInterfaceOrientation.LandscapeLeft || toInterfaceOrientation == UIInterfaceOrientation.LandscapeRight)
            {
                AppDelegate.IsLandscape = true;
            }

            else
            {
                AppDelegate.IsLandscape = false;
            }
        }

        public override void DidRotate (UIInterfaceOrientation fromInterfaceOrientation)
        {
            base.DidRotate (fromInterfaceOrientation);

            AppDelegate.ScreenWidth = this.View.Frame.Width;
            AppDelegate.ScreenHeight = this.View.Frame.Height;
        }

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

            RefreshTableView ();
        }

        private void CreateNavigationBar ()
        {
            UIBarButtonItem menuButton;

            //Style settings
            this.NavigationController.SetNavigationBarHidden (false, false);
            this.NavigationController.NavigationBar.Translucent = false;
            this.NavigationController.NavigationBar.BarTintColor = AppDelegate.Theme;
            this.NavigationController.NavigationBar.TintColor = UIColor.White;
            this.NavigationController.NavigationBar.TitleTextAttributes = AppDelegate.NavigationStringAttributes;

            this.NavigationItem.Title = "Contactenoverzicht";

            menuButton = new UIBarButtonItem (
                UIImage.FromFile ("Images/menu_iphone.png"),
                UIBarButtonItemStyle.Plain, MenuClicked);

            menuButton.TintColor = UIColor.White;

            this.NavigationItem.LeftBarButtonItem = menuButton;
        }

        public void RefreshTableView()
        {
            ContactOverviewDataSource source;

            if (searchBar.Text == null || searchBar.Text == "")
            {
                source = new ContactOverviewDataSource (contacts);
            }

            else
            {
                source = new ContactOverviewDataSource (filteredContacts);
            }

            source.OnRowSelected += (object sender, ContactOverviewDataSource.RowSelectedEventArgs e) =>
            {
                char[] letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToArray ();
                string[] keys = new string[letters.Length];

                for (int i = 0; i < letters.Length; i++)
                {
                    keys [i] = letters [i].ToString ();
                }

                List<Contact> temp = new List<Contact> ();

                foreach (var c in contact)
                {
                    if (c.LastName.ToLower()[0].ToString() == keys [e.indexPath.Section].ToLower())
                    {
                        temp.Add (c);
                    }
                }

                AppDelegate.SelectedContact = temp[e.indexPath.Row];
                this.NavigationController.PushViewController (new ContactDetailViewController (), true);
                e.tableView.DeselectRow (e.indexPath, true);
            };

            tableContacts.Source = source;
            tableContacts.ReloadData ();
        }

        void MenuClicked (object sender, EventArgs e)
        {
            AppDelegate.Navigation.ToggleMenu ();
        }

        void SearchClicked()
        {
            AppDelegate.SelectedContact = dataController.GetContactByID (searchBar.Text);

            if (AppDelegate.SelectedContact != null)
            {
                this.NavigationController.PushViewController (new ContactDetailViewController (), true);
            }

            else
            {
                AppDelegate.ShowPopupMessage("Het opgegeven contactnummer is niet juist. Probeer het opnieuw.");
            }
        }

        public void SearchContact (string filter)
        {
            filteredContacts.Clear ();

            foreach (var contact in contacts)
            {
                if (contact.LastName.ToLower().Contains (filter.ToLower ()) || contact.ContactID.Contains (filter))
                {
                    if (!filteredContacts.Contains (contact))
                    {
                        filteredContacts.Add (contact);
                    }
                }
            }

            RefreshTableView ();
        }
    }
}