Connected.Components/Components/Snackbar/SnackbarProvider.razor.cs

// Copyright (c) Alessandro Ghidini. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
// Changes and improvements Copyright (c) The MudBlazor Team

using Connected.Utilities;
using Microsoft.AspNetCore.Components;

namespace Connected.Components;

public partial class SnackbarProvider : UIComponent, IDisposable
{
   [Inject] private ISnackbar Snackbars { get; set; }

   [CascadingParameter(Name = "RightToLeft")] public bool RightToLeft { get; set; }

   protected IEnumerable<Snackbar> Snackbar => Snackbars.Configuration.NewestOnTop
           ? Snackbars.ShownSnackbars.Reverse()
           : Snackbars.ShownSnackbars;

   protected string Classname =>
       new CssBuilder(Class)
       .AddClass(GetPositionClass())
   .Build();

   private string GetPositionClass()
   {
      var positionClass = Snackbars.Configuration.PositionClass;
      return positionClass switch
      {
         Defaults.Classes.Position.BottomStart => RightToLeft ? Defaults.Classes.Position.BottomRight : Defaults.Classes.Position.BottomLeft,
         Defaults.Classes.Position.BottomEnd => RightToLeft ? Defaults.Classes.Position.BottomLeft : Defaults.Classes.Position.BottomRight,
         Defaults.Classes.Position.TopStart => RightToLeft ? Defaults.Classes.Position.TopRight : Defaults.Classes.Position.TopLeft,
         Defaults.Classes.Position.TopEnd => RightToLeft ? Defaults.Classes.Position.TopLeft : Defaults.Classes.Position.TopRight,
         _ => positionClass
      };
   }

   protected override void OnInitialized()
   {
      base.OnInitialized();
      Snackbars.OnSnackbarsUpdated += OnSnackbarsUpdated;
   }

   private void OnSnackbarsUpdated()
   {
      InvokeAsync(StateHasChanged);
   }

   public void Dispose()
   {
      Snackbars.OnSnackbarsUpdated -= OnSnackbarsUpdated;
   }
}