prs/prs.mobile/comal.timesheets/CustomControls/Pages/Selection Screens/Under development/EmployeeSelectionList.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace comal.timesheets
{
    public delegate void OnEmployeesSaved(List<EmployeeShell> employees);
    public delegate void OnEmployeeSaved(EmployeeShell employee);
    [XamlCompilation(XamlCompilationOptions.Compile)]    
    public partial class EmployeeSelectionList : ContentPage
    {
        bool multiSelect = false;
        List<EmployeeShell> employees = new List<EmployeeShell>();
        List<EmployeeShell> selectedList = new List<EmployeeShell>();
        string currentFilter = "";
        public event OnEmployeesSaved OnEmployeesSaved;
        public event OnEmployeeSaved OnEmployeeSaved;
        public EmployeeSelectionList(bool multiselect = false)
        {
            InitializeComponent();
            NavigationPage.SetHasBackButton(this, false);
            multiSelect = multiselect;

            List<string> options = new List<string>();
            options.Add("All");
            employees.Clear();
            foreach (var emp in GlobalVariables.EmployeeShells)
            {
                employees.Add(emp);
                if (!options.Contains(emp.TeamName))
                    options.Add(emp.TeamName);
            }

            filterOptionsControl.Options = options;
            filterOptionsControl.CreateRadioButtonsAndSetDefault(options[0]);
            currentFilter = options[0];
            filterOptionsControl.OnFilterOptionChanged += FilterOptionsControl_OnFilterOptionChanged;

            employeeListview.ItemsSource = employees;
        }

        private void FilterOptionsControl_OnFilterOptionChanged(string filterOption)
        {
            if (filterOption == currentFilter)
                return;
            currentFilter = filterOption;
            if (filterOption == "All")
            {
                employeeListview.ItemsSource = null;
                employeeListview.ItemsSource = employees;
            }
            else
            {
                employeeListview.ItemsSource = null;
                employeeListview.ItemsSource = employees.Where(x => x.TeamName == filterOption);
            }
        }

        private void Exit(object sender, EventArgs e)
        {
            Navigation.PopAsync();
        }

        private void Save_Clicked(object sender, EventArgs e)
        {
            OnEmployeesSaved?.Invoke(selectedList);
            Navigation.PopAsync();
        }

        private void SearchEdt_Changed(object sender, EventArgs e)
        {
            RunSearch();
        }

        private void RunSearch()
        {
            if (currentFilter != "All")
            {
                var list = employees.Where(x => x.TeamName.Equals(currentFilter));
                List<EmployeeShell> searchList = new List<EmployeeShell>();
                foreach (var item in list)
                {
                    searchList.Add(item);
                }
                if (string.IsNullOrWhiteSpace(searchEnt.Text))
                {
                    employeeListview.ItemsSource = null;
                    employeeListview.ItemsSource = searchList;
                }
                else
                {
                    employeeListview.ItemsSource = null;
                    employeeListview.ItemsSource = searchList.Where(x => x.Name.Contains(searchEnt.Text.ToUpper()) || x.Name.Contains(searchEnt.Text.ToLower())
                        || x.Name.Contains(UpperCaseFirst(searchEnt.Text)));
                }
            }
            else
            {
                if (string.IsNullOrWhiteSpace(searchEnt.Text))
                {
                    employeeListview.ItemsSource = null;
                    employeeListview.ItemsSource = employees;
                }
                else
                {
                    employeeListview.ItemsSource = null;
                    employeeListview.ItemsSource = employees.Where(x => x.Name.Contains(searchEnt.Text.ToUpper()) || x.Name.Contains(searchEnt.Text.ToLower())
                        || x.Name.Contains(UpperCaseFirst(searchEnt.Text)));
                }
            }
        }

        private void ViewCell_Tapped(object sender, EventArgs e)
        {
            EmployeeShell shell = employeeListview.SelectedItem as EmployeeShell;

            if (multiSelect)
            {
                MultiSelectEmployee(shell);
            }
            else
            {
                OnEmployeeSaved?.Invoke(shell);
                Navigation.PopAsync();
            }           
        }

        public void MultiSelectEmployee(EmployeeShell shell)
        {
            if (shell.Color == Color.Default)
            {
                saveBtn.IsVisible = true;
                selectedList.Add(shell);
                int index = employees.FindIndex(x => x.ID == shell.ID);
                employees.RemoveAt(index);
                shell.Color = Color.FromHex("#a2006d");
                employees.Insert(index, shell);
            }
            else if (shell.Color == Color.FromHex("#a2006d"))
            {
                int index = selectedList.FindIndex(x => x.ID == shell.ID);
                selectedList.RemoveAt(index);
                if (selectedList.Count == 0)
                    saveBtn.IsVisible = false;

                int index2 = employees.FindIndex(x => x.ID == shell.ID);
                employees.RemoveAt(index2);
                shell.Color = Color.Default;
                employees.Insert(index2, shell);
            }
            RunSearch();
        }

        static String UpperCaseFirst(string s)
        {
            char[] a = s.ToCharArray();
            a[0] = char.ToUpper(a[0]);
            return new string(a);
        }
    }
}