YOUserbase/GroupOverviewPage.xaml.cs

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace YOUserbase;

public partial class GroupOverviewPage : ContentPage {
	public int _index = 0;

	private string details;
	private string name;
	public string Details { get => details; set => SetProperty (ref details, value); }
	public string Name { get => name; set => SetProperty (ref name, value); }

	public GroupOverviewPage ()
	{
		InitializeComponent ();
		groups.ItemsSource = Data.Groups;
	}

	private async void OnAdd (object sender, EventArgs e)
	{
		await Navigation.PushAsync (new CreateGroupPage ());
	}

	private async void OnDeleteItem (object sender, EventArgs e)
	{
		Button btn = (Button)sender;
		var id = Int32.Parse (btn.ClassId);
		var group = Data.Groups.FirstOrDefault (usr => usr.Id == id);
		var action = await DisplayAlert ("Irreversible action", "Do you really want to delete this group?\nThis will also delete every User that that belongs to this group", "Yes", "No");
		if (action) {
			while (Data.Users.FirstOrDefault (usr => usr.WorkingGroup == group) != null) {
				Data.Users.Remove (Data.Users.FirstOrDefault (usr => usr.WorkingGroup == group));
			}
			Data.Groups.Remove (group);
		}
	}

	private async void OnEditItem (object sender, EventArgs e)
	{
		Button btn = (Button)sender;
		var id = Int32.Parse (btn.ClassId);
		var group = Data.Groups.FirstOrDefault (usr => usr.Id == id);
		Console.WriteLine("there");
		await Navigation.PushAsync(new CreateGroupPage(group));
		Console.WriteLine("and there");
	}

	protected bool SetProperty<T> (ref T field, T newValue, [CallerMemberName] string propertyName = null)
	{
		if (!Equals (field, newValue)) {
			field = newValue;
			return true;
		}

		return false;
	}
}