use cancellation tokens in ui (#666)

* use cancellation tokens in pages

* use cancellation token in shared ui

* use cancellation tokens in artwork controller

ErsatzTV.Core/Interfaces/GitHub/IGitHubApiClient.cs

@@ -1,11 +1,12 @@
-using System.Threading.Tasks;
+using System.Threading;
+using System.Threading.Tasks;
 using LanguageExt;
 
 namespace ErsatzTV.Core.Interfaces.GitHub
 {
     public interface IGitHubApiClient
     {
-        Task<Either<BaseError, string>> GetLatestReleaseNotes();
+        Task<Either<BaseError, string>> GetLatestReleaseNotes(CancellationToken cancellationToken);
-        Task<Either<BaseError, string>> GetReleaseNotes(string tag);
+        Task<Either<BaseError, string>> GetReleaseNotes(string tag, CancellationToken cancellationToken);
     }
 }

ErsatzTV.Infrastructure/GitHub/GitHubApiClient.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Core;
 using ErsatzTV.Core.Interfaces.GitHub;
@@ -9,12 +10,12 @@ namespace ErsatzTV.Infrastructure.GitHub
 {
     public class GitHubApiClient : IGitHubApiClient
     {
-        public async Task<Either<BaseError, string>> GetLatestReleaseNotes()
+        public async Task<Either<BaseError, string>> GetLatestReleaseNotes(CancellationToken cancellationToken)
         {
             try
             {
                 IGitHubApi service = RestService.For<IGitHubApi>("https://api.github.com");
-                return await service.GetReleases().Map(releases => releases.Head().Body);
+                return await service.GetReleases(cancellationToken).Map(releases => releases.Head().Body);
             }
             catch (Exception ex)
             {
@@ -22,12 +23,12 @@ namespace ErsatzTV.Infrastructure.GitHub
             }
         }
 
-        public async Task<Either<BaseError, string>> GetReleaseNotes(string tag)
+        public async Task<Either<BaseError, string>> GetReleaseNotes(string tag, CancellationToken cancellationToken)
         {
             try
             {
                 IGitHubApi service = RestService.For<IGitHubApi>("https://api.github.com");
-                return await service.GetTag(tag).Map(t => t.Body);
+                return await service.GetTag(tag, cancellationToken).Map(t => t.Body);
             }
             catch (Exception ex)
             {

ErsatzTV.Infrastructure/GitHub/IGitHubApi.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Infrastructure.GitHub.Models;
 using Refit;
@@ -9,9 +10,9 @@ namespace ErsatzTV.Infrastructure.GitHub
     public interface IGitHubApi
     {
         [Get("/repos/jasongdove/ErsatzTV/releases")]
-        public Task<List<GitHubTag>> GetReleases();
+        public Task<List<GitHubTag>> GetReleases(CancellationToken cancellationToken);
 
         [Get("/repos/jasongdove/ErsatzTV/releases/tags/{tag}")]
-        public Task<GitHubTag> GetTag(string tag);
+        public Task<GitHubTag> GetTag(string tag, CancellationToken cancellationToken);
     }
 }

ErsatzTV/Controllers/ArtworkController.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Net.Http;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Application.Emby;
 using ErsatzTV.Application.Emby.Queries;
@@ -40,30 +41,30 @@ namespace ErsatzTV.Controllers
         [HttpHead("/iptv/artwork/posters/{fileName}.jpg")]
         [HttpGet("/iptv/artwork/posters/{fileName}.jpg")]
         [HttpGet("/artwork/posters/{fileName}")]
-        public async Task<IActionResult> GetPoster(string fileName)
+        public async Task<IActionResult> GetPoster(string fileName, CancellationToken cancellationToken)
         {
             Either<BaseError, CachedImagePathViewModel> cachedImagePath =
-                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Poster, 440));
+                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Poster, 440), cancellationToken);
             return cachedImagePath.Match<IActionResult>(
                 Left: _ => new NotFoundResult(),
                 Right: r => new PhysicalFileResult(r.FileName, r.MimeType));
         }
 
         [HttpGet("/artwork/watermarks/{fileName}")]
-        public async Task<IActionResult> GetWatermark(string fileName)
+        public async Task<IActionResult> GetWatermark(string fileName, CancellationToken cancellationToken)
         {
             Either<BaseError, CachedImagePathViewModel> cachedImagePath =
-                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Watermark));
+                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Watermark), cancellationToken);
             return cachedImagePath.Match<IActionResult>(
                 Left: _ => new NotFoundResult(),
                 Right: r => new PhysicalFileResult(r.FileName, r.MimeType));
         }
 
         [HttpGet("/artwork/fanart/{fileName}")]
-        public async Task<IActionResult> GetFanArt(string fileName)
+        public async Task<IActionResult> GetFanArt(string fileName, CancellationToken cancellationToken)
         {
             Either<BaseError, CachedImagePathViewModel> cachedImagePath =
-                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.FanArt));
+                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.FanArt), cancellationToken);
             return cachedImagePath.Match<IActionResult>(
                 Left: _ => new NotFoundResult(),
                 Right: r => new PhysicalFileResult(r.FileName, r.MimeType));
@@ -77,14 +78,14 @@ namespace ErsatzTV.Controllers
         [HttpGet("/iptv/artwork/thumbnails/jellyfin/{*path}")]
         [HttpGet("/artwork/thumbnails/jellyfin/{*path}")]
         [HttpGet("/artwork/fanart/jellyfin/{*path}")]
-        public Task<IActionResult> GetJellyfin(string path)
+        public Task<IActionResult> GetJellyfin(string path, CancellationToken cancellationToken)
         {
             if (Request.QueryString.HasValue)
             {
                 path += Request.QueryString.Value;
             }
 
-            return GetJellyfinArtwork(path);
+            return GetJellyfinArtwork(path, cancellationToken);
         }
 
         [HttpHead("/iptv/artwork/posters/emby/{*path}")]
@@ -94,54 +95,54 @@ namespace ErsatzTV.Controllers
         [HttpGet("/iptv/artwork/thumbnails/emby/{*path}")]
         [HttpGet("/artwork/thumbnails/emby/{*path}")]
         [HttpGet("/artwork/fanart/emby/{*path}")]
-        public Task<IActionResult> GetEmby(string path)
+        public Task<IActionResult> GetEmby(string path, CancellationToken cancellationToken)
         {
             if (Request.QueryString.HasValue)
             {
                 path += Request.QueryString.Value;
             }
 
-            return GetEmbyArtwork(path);
+            return GetEmbyArtwork(path, cancellationToken);
         }
 
         [HttpHead("/iptv/artwork/posters/plex/{plexMediaSourceId}/{*path}")]
         [HttpGet("/iptv/artwork/posters/plex/{plexMediaSourceId}/{*path}")]
         [HttpGet("/artwork/posters/plex/{plexMediaSourceId}/{*path}")]
-        public Task<IActionResult> GetPlexPoster(int plexMediaSourceId, string path) =>
+        public Task<IActionResult> GetPlexPoster(int plexMediaSourceId, string path, CancellationToken cancellationToken) =>
             GetPlexArtwork(
                 plexMediaSourceId,
-                $"photo/:/transcode?url=/{path}&height=440&width=304&minSize=1&upscale=0");
+                $"photo/:/transcode?url=/{path}&height=440&width=304&minSize=1&upscale=0",
+                cancellationToken);
 
         [HttpGet("/artwork/fanart/plex/{plexMediaSourceId}/{*path}")]
-        public Task<IActionResult> GetPlexFanArt(int plexMediaSourceId, string path) =>
+        public Task<IActionResult> GetPlexFanArt(int plexMediaSourceId, string path, CancellationToken cancellationToken) =>
-            GetPlexArtwork(
+            GetPlexArtwork(plexMediaSourceId, $"/{path}", cancellationToken);
-                plexMediaSourceId,
-                $"/{path}");
 
         [HttpGet("/artwork/thumbnails/plex/{plexMediaSourceId}/{*path}")]
-        public Task<IActionResult> GetPlexThumbnail(int plexMediaSourceId, string path) =>
+        public Task<IActionResult> GetPlexThumbnail(int plexMediaSourceId, string path, CancellationToken cancellationToken) =>
             GetPlexArtwork(
                 plexMediaSourceId,
-                $"photo/:/transcode?url=/{path}&height=220&width=392&minSize=1&upscale=0");
+                $"photo/:/transcode?url=/{path}&height=220&width=392&minSize=1&upscale=0",
+                cancellationToken);
 
         [HttpHead("/iptv/artwork/thumbnails/{fileName}")]
         [HttpGet("/iptv/artwork/thumbnails/{fileName}")]
         [HttpHead("/iptv/artwork/thumbnails/{fileName}.jpg")]
         [HttpGet("/iptv/artwork/thumbnails/{fileName}.jpg")]
         [HttpGet("/artwork/thumbnails/{fileName}")]
-        public async Task<IActionResult> GetThumbnail(string fileName)
+        public async Task<IActionResult> GetThumbnail(string fileName, CancellationToken cancellationToken)
         {
             Either<BaseError, CachedImagePathViewModel> cachedImagePath =
-                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Thumbnail, 220));
+                await _mediator.Send(new GetCachedImagePath(fileName, ArtworkKind.Thumbnail, 220), cancellationToken);
             return cachedImagePath.Match<IActionResult>(
                 Left: _ => new NotFoundResult(),
                 Right: r => new PhysicalFileResult(r.FileName, r.MimeType));
         }
 
-        private async Task<IActionResult> GetPlexArtwork(int plexMediaSourceId, string transcodePath)
+        private async Task<IActionResult> GetPlexArtwork(int plexMediaSourceId, string transcodePath, CancellationToken cancellationToken)
         {
             Either<BaseError, PlexConnectionParametersViewModel> connectionParameters =
-                await _mediator.Send(new GetPlexConnectionParameters(plexMediaSourceId));
+                await _mediator.Send(new GetPlexConnectionParameters(plexMediaSourceId), cancellationToken);
 
             return await connectionParameters.Match<Task<IActionResult>>(
                 Left: _ => new NotFoundResult().AsTask<IActionResult>(),
@@ -153,8 +154,9 @@ namespace ErsatzTV.Controllers
                     var fullPath = new Uri(r.Uri, transcodePath);
                     HttpResponseMessage response = await client.GetAsync(
                         fullPath,
-                        HttpCompletionOption.ResponseHeadersRead);
+                        HttpCompletionOption.ResponseHeadersRead,
-                    Stream stream = await response.Content.ReadAsStreamAsync();
+                        cancellationToken);
+                    Stream stream = await response.Content.ReadAsStreamAsync(cancellationToken);
 
                     return new FileStreamResult(
                         stream,
@@ -162,10 +164,10 @@ namespace ErsatzTV.Controllers
                 });
         }
 
-        private async Task<IActionResult> GetJellyfinArtwork(string path)
+        private async Task<IActionResult> GetJellyfinArtwork(string path, CancellationToken cancellationToken)
         {
             Either<BaseError, JellyfinConnectionParametersViewModel> connectionParameters =
-                await _mediator.Send(new GetJellyfinConnectionParameters());
+                await _mediator.Send(new GetJellyfinConnectionParameters(), cancellationToken);
 
             return await connectionParameters.Match<Task<IActionResult>>(
                 Left: _ => new NotFoundResult().AsTask<IActionResult>(),
@@ -176,8 +178,9 @@ namespace ErsatzTV.Controllers
                     Url fullPath = JellyfinUrl.ForArtwork(vm.Address, path);
                     HttpResponseMessage response = await client.GetAsync(
                         fullPath,
-                        HttpCompletionOption.ResponseHeadersRead);
+                        HttpCompletionOption.ResponseHeadersRead,
-                    Stream stream = await response.Content.ReadAsStreamAsync();
+                        cancellationToken);
+                    Stream stream = await response.Content.ReadAsStreamAsync(cancellationToken);
 
                     return new FileStreamResult(
                         stream,
@@ -185,10 +188,10 @@ namespace ErsatzTV.Controllers
                 });
         }
 
-        private async Task<IActionResult> GetEmbyArtwork(string path)
+        private async Task<IActionResult> GetEmbyArtwork(string path, CancellationToken cancellationToken)
         {
             Either<BaseError, EmbyConnectionParametersViewModel> connectionParameters =
-                await _mediator.Send(new GetEmbyConnectionParameters());
+                await _mediator.Send(new GetEmbyConnectionParameters(), cancellationToken);
 
             return await connectionParameters.Match<Task<IActionResult>>(
                 Left: _ => new NotFoundResult().AsTask<IActionResult>(),
@@ -199,8 +202,9 @@ namespace ErsatzTV.Controllers
                     Url fullPath = EmbyUrl.ForArtwork(vm.Address, path);
                     HttpResponseMessage response = await client.GetAsync(
                         fullPath,
-                        HttpCompletionOption.ResponseHeadersRead);
+                        HttpCompletionOption.ResponseHeadersRead,
-                    Stream stream = await response.Content.ReadAsStreamAsync();
+                        cancellationToken);
+                    Stream stream = await response.Content.ReadAsStreamAsync(cancellationToken);
 
                     return new FileStreamResult(
                         stream,

ErsatzTV/Pages/Artist.razor

@@ -8,8 +8,10 @@
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.ProgramSchedules.Commands
 @using System.Globalization
+@using System.Threading
 @using ErsatzTV.Extensions
 @using Unit = LanguageExt.Unit
+@implements IDisposable
 @inject IMediator _mediator
 @inject IDialogService _dialog
 @inject NavigationManager _navigationManager
@@ -185,6 +187,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int ArtistId { get; set; }
@@ -195,12 +198,18 @@
     private List<string> _sortedStyles = new();
     private List<string> _sortedMoods = new();
     private MusicVideoCardResultsViewModel _musicVideos;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override Task OnParametersSetAsync() => RefreshData();
 
     private async Task RefreshData()
     {
-        await _mediator.Send(new GetArtistById(ArtistId)).IfSomeAsync(vm =>
+        await _mediator.Send(new GetArtistById(ArtistId), _cts.Token).IfSomeAsync(vm =>
         {
             _artist = vm;
             _sortedLanguages = _artist.Languages.OrderBy(ci => ci.EnglishName).ToList();
@@ -209,7 +218,7 @@
             _sortedMoods = _artist.Moods.OrderBy(m => m).ToList();
         });
 
-        _musicVideos = await _mediator.Send(new GetMusicVideoCards(ArtistId, 1, 100));
+        _musicVideos = await _mediator.Send(new GetMusicVideoCards(ArtistId, 1, 100), _cts.Token);
     }
 
     private async Task AddToCollection()
@@ -221,7 +230,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
-            await _mediator.Send(new AddArtistToCollection(collection.Id, ArtistId));
+            await _mediator.Send(new AddArtistToCollection(collection.Id, ArtistId), _cts.Token);
             _navigationManager.NavigateTo($"/media/collections/{collection.Id}");
         }
     }
@@ -235,7 +244,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is ProgramScheduleViewModel schedule)
         {
-            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.Artist, null, null, null, ArtistId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null));
+            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.Artist, null, null, null, ArtistId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null), _cts.Token);
             _navigationManager.NavigateTo($"/schedules/{schedule.Id}/items");
         }
     }
@@ -250,7 +259,7 @@
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
             var request = new AddMusicVideoToCollection(collection.Id, musicVideo.MusicVideoId);
-            Either<BaseError, Unit> addResult = await _mediator.Send(request);
+            Either<BaseError, Unit> addResult = await _mediator.Send(request, _cts.Token);
             addResult.Match(
                 Left: error =>
                 {

ErsatzTV/Pages/ArtistList.razor

@@ -97,7 +97,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:artist" : $"type:artist AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexArtists(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexArtists(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -144,7 +144,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddArtistToCollection(collection.Id, artist.ArtistId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/ChannelEditor.razor

@@ -6,6 +6,7 @@
 @using ErsatzTV.Application.Images.Commands
 @using ErsatzTV.Application.MediaItems.Queries
 @using System.Globalization
+@using System.Threading
 @using ErsatzTV.Application.Channels
 @using ErsatzTV.Application.Channels.Queries
 @using ErsatzTV.Application.Filler
@@ -13,6 +14,7 @@
 @using ErsatzTV.Application.Watermarks
 @using ErsatzTV.Application.Watermarks.Queries
 @using ErsatzTV.Core.Domain.Filler
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ChannelEditor> _logger
 @inject ISnackbar _snackbar
@@ -107,6 +109,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int? Id { get; set; }
@@ -119,17 +122,23 @@
     private List<CultureInfo> _availableCultures;
     private List<WatermarkViewModel> _watermarks;
     private List<FillerPresetViewModel> _fillerPresets;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        await LoadFFmpegProfiles();
+        await LoadFFmpegProfiles(_cts.Token);
-        _availableCultures = await _mediator.Send(new GetAllLanguageCodes());
+        _availableCultures = await _mediator.Send(new GetAllLanguageCodes(), _cts.Token);
-        await LoadWatermarks();
+        await LoadWatermarks(_cts.Token);
-        await LoadFillerPresets();
+        await LoadFillerPresets(_cts.Token);
 
         if (Id.HasValue)
         {
-            Option<ChannelViewModel> maybeChannel = await _mediator.Send(new GetChannelById(Id.Value));
+            Option<ChannelViewModel> maybeChannel = await _mediator.Send(new GetChannelById(Id.Value), _cts.Token);
             maybeChannel.Match(
                 channelViewModel =>
                 {
@@ -149,10 +158,10 @@
         }
         else
         {
-            FFmpegSettingsViewModel ffmpegSettings = await _mediator.Send(new GetFFmpegSettings());
+            FFmpegSettingsViewModel ffmpegSettings = await _mediator.Send(new GetFFmpegSettings(), _cts.Token);
 
     // TODO: command for new channel
-            IEnumerable<int> channelNumbers = await _mediator.Send(new GetAllChannels())
+            IEnumerable<int> channelNumbers = await _mediator.Send(new GetAllChannels(), _cts.Token)
                 .Map(list => list.Map(c => int.TryParse(c.Number.Split(".").Head(), out int result) ? result : 0));
             int maxNumber = Optional(channelNumbers).Flatten().DefaultIfEmpty(0).Max();
             _model.Number = (maxNumber + 1).ToString();
@@ -171,14 +180,14 @@
 
     private bool IsEdit => Id.HasValue;
 
-    private async Task LoadFFmpegProfiles() =>
+    private async Task LoadFFmpegProfiles(CancellationToken cancellationToken) =>
-        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles());
+        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), cancellationToken);
 
-    private async Task LoadWatermarks() =>
+    private async Task LoadWatermarks(CancellationToken cancellationToken) =>
-        _watermarks = await _mediator.Send(new GetAllWatermarks());
+        _watermarks = await _mediator.Send(new GetAllWatermarks(), cancellationToken);
 
-    private async Task LoadFillerPresets() =>
+    private async Task LoadFillerPresets(CancellationToken cancellationToken) =>
-        _fillerPresets = await _mediator.Send(new GetAllFillerPresets())
+        _fillerPresets = await _mediator.Send(new GetAllFillerPresets(), cancellationToken)
             .Map(list => list.Filter(vm => vm.FillerKind == FillerKind.Fallback).ToList());
 
     private async Task HandleSubmitAsync()
@@ -187,8 +196,8 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(_model.ToUpdate())).LeftToSeq() :
+                (await _mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(_model.ToCreate())).LeftToSeq();
+                (await _mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>
@@ -205,7 +214,7 @@
         try
         {
             Either<BaseError, string> maybeCacheFileName =
-                await _mediator.Send(new SaveArtworkToDisk(e.File.OpenReadStream(maxAllowedSize: 10 * 1024 * 1024), ArtworkKind.Logo));
+                await _mediator.Send(new SaveArtworkToDisk(e.File.OpenReadStream(maxAllowedSize: 10 * 1024 * 1024), ArtworkKind.Logo), _cts.Token);
             maybeCacheFileName.Match(
                 relativeFileName =>
                 {

ErsatzTV/Pages/Channels.razor

@@ -7,6 +7,8 @@
 @using ErsatzTV.Application.FFmpegProfiles
 @using ErsatzTV.Application.FFmpegProfiles.Queries
 @using System.Globalization
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 
@@ -82,15 +84,23 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<ChannelViewModel> _table;
     private List<FFmpegProfileViewModel> _ffmpegProfiles;
 
     private int _rowsPerPage;
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
-        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles());
+        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), _cts.Token);
-        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.ChannelsPageSize))
+        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.ChannelsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
     }
 
@@ -103,16 +113,16 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteChannel(channel.Id));
+            await _mediator.Send(new DeleteChannel(channel.Id), _cts.Token);
             await _table.ReloadServerData();
         }
     }
 
     private async Task<TableData<ChannelViewModel>> ServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.ChannelsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.ChannelsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        List<ChannelViewModel> channels = await _mediator.Send(new GetAllChannels());
+        List<ChannelViewModel> channels = await _mediator.Send(new GetAllChannels(), _cts.Token);
         IOrderedEnumerable<ChannelViewModel> sorted = channels.OrderBy(c => decimal.Parse(c.Number));
 
         CultureInfo[] allCultures = CultureInfo.GetCultures(CultureTypes.NeutralCultures);

ErsatzTV/Pages/CollectionEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
 @using ErsatzTV.Application.MediaCollections.Queries
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<CollectionEditor> _logger
 @inject ISnackbar _snackbar
@@ -29,19 +31,26 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
-
+    
     private readonly CollectionEditViewModel _model = new();
     private EditContext _editContext;
     private ValidationMessageStore _messageStore;
     
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
         if (IsEdit)
         {
-            Option<MediaCollectionViewModel> maybeCollection = await _mediator.Send(new GetCollectionById(Id));
+            Option<MediaCollectionViewModel> maybeCollection = await _mediator.Send(new GetCollectionById(Id), _cts.Token);
             maybeCollection.IfSome(collection =>
             {
                 _model.Id = collection.Id;
@@ -68,8 +77,8 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(new UpdateCollection(Id, _model.Name))).LeftToSeq() :
+                (await _mediator.Send(new UpdateCollection(Id, _model.Name), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(new CreateCollection(_model.Name))).LeftToSeq();
+                (await _mediator.Send(new CreateCollection(_model.Name), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>

ErsatzTV/Pages/CollectionItems.razor

@@ -294,7 +294,7 @@
     protected override async Task RefreshData()
     {
         Either<BaseError, CollectionCardResultsViewModel> maybeResult =
-            await Mediator.Send(new GetCollectionCards(Id));
+            await Mediator.Send(new GetCollectionCards(Id), CancellationToken);
 
         maybeResult.Match(
             result => _data = result,
@@ -459,7 +459,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await Mediator.Send(request);
+            await Mediator.Send(request, CancellationToken);
             await RefreshData();
         }
     }
@@ -468,7 +468,7 @@
     {
         _data.UseCustomPlaybackOrder = !_data.UseCustomPlaybackOrder;
         var request = new UpdateCollection(Id, _data.Name) { UseCustomPlaybackOrder = _data.UseCustomPlaybackOrder };
-        await Mediator.Send(request);
+        await Mediator.Send(request, CancellationToken);
     }
 
 }

ErsatzTV/Pages/Collections.razor

@@ -5,6 +5,8 @@
 @using ErsatzTV.Application.Configuration.Queries
 @using ErsatzTV.Application.Configuration.Commands
 @using ErsatzTV.Extensions
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 
@@ -134,6 +136,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<MediaCollectionViewModel> _collectionsTable;
     private MudTable<MultiCollectionViewModel> _multiCollectionsTable;
     private MudTable<SmartCollectionViewModel> _smartCollectionsTable;
@@ -141,16 +145,22 @@
     private int _collectionsRowsPerPage;
     private int _multiCollectionsRowsPerPage;
     private int _smartCollectionsRowsPerPage;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        _collectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.CollectionsPageSize))
+        _collectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.CollectionsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
 
-        _multiCollectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.MultiCollectionsPageSize))
+        _multiCollectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.MultiCollectionsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
 
-        _smartCollectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SmartCollectionsPageSize))
+        _smartCollectionsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SmartCollectionsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
     }
     
@@ -163,7 +173,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteCollection(collection.Id));
+            await _mediator.Send(new DeleteCollection(collection.Id), _cts.Token);
             await _collectionsTable.ReloadServerData();
         }
     }
@@ -177,7 +187,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteMultiCollection(collection.Id));
+            await _mediator.Send(new DeleteMultiCollection(collection.Id), _cts.Token);
             await _multiCollectionsTable.ReloadServerData();
         }
     }
@@ -191,32 +201,32 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteSmartCollection(collection.Id));
+            await _mediator.Send(new DeleteSmartCollection(collection.Id), _cts.Token);
             await _smartCollectionsTable.ReloadServerData();
         }
     }
 
     private async Task<TableData<MediaCollectionViewModel>> ServerReloadCollections(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.CollectionsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.CollectionsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        PagedMediaCollectionsViewModel data = await _mediator.Send(new GetPagedCollections(state.Page, state.PageSize));
+        PagedMediaCollectionsViewModel data = await _mediator.Send(new GetPagedCollections(state.Page, state.PageSize), _cts.Token);
         return new TableData<MediaCollectionViewModel> { TotalItems = data.TotalCount, Items = data.Page };
     }
 
     private async Task<TableData<MultiCollectionViewModel>> ServerReloadMultiCollections(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.MultiCollectionsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.MultiCollectionsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        PagedMultiCollectionsViewModel data = await _mediator.Send(new GetPagedMultiCollections(state.Page, state.PageSize));
+        PagedMultiCollectionsViewModel data = await _mediator.Send(new GetPagedMultiCollections(state.Page, state.PageSize), _cts.Token);
         return new TableData<MultiCollectionViewModel> { TotalItems = data.TotalCount, Items = data.Page };
     }
 
     private async Task<TableData<SmartCollectionViewModel>> ServerReloadSmartCollections(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SmartCollectionsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SmartCollectionsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        PagedSmartCollectionsViewModel data = await _mediator.Send(new GetPagedSmartCollections(state.Page, state.PageSize));
+        PagedSmartCollectionsViewModel data = await _mediator.Send(new GetPagedSmartCollections(state.Page, state.PageSize), _cts.Token);
         return new TableData<SmartCollectionViewModel> { TotalItems = data.TotalCount, Items = data.Page };
     }
 

ErsatzTV/Pages/EmbyLibrariesEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Emby.Queries
 @using ErsatzTV.Application.MediaSources
 @using ErsatzTV.Application.Emby
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ChannelWriter<IEmbyBackgroundServiceRequest> _channel
 
@@ -16,10 +18,17 @@
     SynchronizeLibraryByIdIfNeeded="SynchronizeLibraryByIdIfNeeded"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     private IRequest<Either<BaseError, Unit>> GetUpdateLibraryRequest(List<RemoteMediaSourceLibraryEditViewModel> libraries) =>
         new UpdateEmbyLibraryPreferences(
             libraries.Map(l => new EmbyLibraryPreference(l.Id, l.ShouldSyncItems)).ToList());
@@ -42,7 +51,7 @@
 
     private async Task<Unit> SynchronizeLibraryByIdIfNeeded(int libraryId)
     {
-        await _channel.WriteAsync(new SynchronizeEmbyLibraryByIdIfNeeded(libraryId));
+        await _channel.WriteAsync(new SynchronizeEmbyLibraryByIdIfNeeded(libraryId), _cts.Token);
         return Unit.Default;
     }
 

ErsatzTV/Pages/EmbyMediaSourceEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Core.Emby
 @using ErsatzTV.Application.Emby.Queries
 @using ErsatzTV.Application.Emby.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject NavigationManager _navigationManager
 @inject ISnackbar _snackbar
@@ -14,10 +16,17 @@
     SaveSecrets="SaveSecrets"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private async Task<Unit> LoadSecrets(RemoteMediaSourceEditViewModel viewModel)
     {
-        EmbySecrets secrets = await _mediator.Send(new GetEmbySecrets());
+        EmbySecrets secrets = await _mediator.Send(new GetEmbySecrets(), _cts.Token);
         viewModel.Address = secrets.Address;
         viewModel.ApiKey = secrets.ApiKey;
         return Unit.Default;
@@ -26,7 +35,7 @@
     private async Task<Either<BaseError, Unit>> SaveSecrets(RemoteMediaSourceEditViewModel viewModel)
     {
         var secrets = new EmbySecrets { Address = viewModel.Address, ApiKey = viewModel.ApiKey };
-        return await _mediator.Send(new SaveEmbySecrets(secrets));
+        return await _mediator.Send(new SaveEmbySecrets(secrets), _cts.Token);
     }
 
 }

ErsatzTV/Pages/EmbyMediaSources.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Core.Interfaces.Emby
 @using ErsatzTV.Application.Emby.Commands
 @using ErsatzTV.Application.Emby.Queries
+@using System.Threading
+@implements IDisposable
 @inject IEmbySecretStore _embySecretStore
 @inject ChannelWriter<IEmbyBackgroundServiceRequest> _channel
 
@@ -16,8 +18,15 @@
     SecretStore="@_embySecretStore"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private async Task RefreshLibraries(int mediaSourceId) =>
-        await _channel.WriteAsync(new SynchronizeEmbyLibraries(mediaSourceId));
+        await _channel.WriteAsync(new SynchronizeEmbyLibraries(mediaSourceId), _cts.Token);
 
 }

ErsatzTV/Pages/EmbyPathReplacementsEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Emby
 @using ErsatzTV.Application.Emby.Commands
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ScheduleItemsEditor> _logger
 @inject ISnackbar _snackbar
@@ -17,16 +19,23 @@
     GetPathReplacementsBySourceId="GetPathReplacementsBySourceId"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     private Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int id) =>
-        _mediator.Send(new GetEmbyMediaSourceById(Id))
+        _mediator.Send(new GetEmbyMediaSourceById(Id), _cts.Token)
             .MapT(vm => new RemoteMediaSourceViewModel(vm.Id, vm.Name, vm.Address));
 
     private Task<List<RemoteMediaSourcePathReplacementEditViewModel>> GetPathReplacementsBySourceId(int mediaSourceId) =>
-        _mediator.Send(new GetEmbyPathReplacementsBySourceId(Id))
+        _mediator.Send(new GetEmbyPathReplacementsBySourceId(Id), _cts.Token)
             .Map(list => list.Map(ProjectToEditViewModel).ToList());
 
     private RemoteMediaSourcePathReplacementEditViewModel ProjectToEditViewModel(EmbyPathReplacementViewModel item) =>

ErsatzTV/Pages/EpisodeList.razor

@@ -97,7 +97,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:episode" : $"type:episode AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexEpisodes(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexEpisodes(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -144,7 +144,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddEpisodeToCollection(collection.Id, episode.EpisodeId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/FFmpeg.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Application.FFmpegProfiles
 @using ErsatzTV.Application.FFmpegProfiles.Commands
 @using ErsatzTV.Application.FFmpegProfiles.Queries
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 @inject ILogger<FFmpeg> _logger
@@ -78,12 +80,20 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private List<FFmpegProfileViewModel> _ffmpegProfiles;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
-    protected override async Task OnParametersSetAsync() => await LoadFFmpegProfilesAsync();
+    protected override async Task OnParametersSetAsync() => await LoadFFmpegProfilesAsync(_cts.Token);
 
-    private async Task LoadFFmpegProfilesAsync() =>
+    private async Task LoadFFmpegProfilesAsync(CancellationToken cancellationToken) =>
-        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles());
+        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), cancellationToken);
 
     private async Task DeleteProfileAsync(FFmpegProfileViewModel ffmpegProfile)
     {
@@ -94,8 +104,8 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteFFmpegProfile(ffmpegProfile.Id));
+            await _mediator.Send(new DeleteFFmpegProfile(ffmpegProfile.Id), _cts.Token);
-            await LoadFFmpegProfilesAsync();
+            await LoadFFmpegProfilesAsync(_cts.Token);
         }
     }
 

ErsatzTV/Pages/FFmpegEditor.razor

@@ -8,6 +8,8 @@
 @using ErsatzTV.Core.FFmpeg
 @using Microsoft.AspNetCore.Components
 @using Microsoft.Extensions.Caching.Memory
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<FFmpegEditor> _logger
 @inject ISnackbar _snackbar
@@ -121,6 +123,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -132,20 +135,26 @@
     private List<ResolutionViewModel> _resolutions;
     private List<string> _vaapiDevices;
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
-        _resolutions = await _mediator.Send(new GetAllResolutions());
+        _resolutions = await _mediator.Send(new GetAllResolutions(), _cts.Token);
 
         if (IsEdit)
         {
-            Option<FFmpegProfileViewModel> profile = await _mediator.Send(new GetFFmpegProfileById(Id));
+            Option<FFmpegProfileViewModel> profile = await _mediator.Send(new GetFFmpegProfileById(Id), _cts.Token);
             profile.Match(
                 ffmpegProfileViewModel => _model = new FFmpegProfileEditViewModel(ffmpegProfileViewModel),
                 () => _navigationManager.NavigateTo("404"));
         }
         else
         {
-            _model = new FFmpegProfileEditViewModel(await _mediator.Send(new NewFFmpegProfile()));
+            _model = new FFmpegProfileEditViewModel(await _mediator.Send(new NewFFmpegProfile(), _cts.Token));
         }
 
         _editContext = new EditContext(_model);
@@ -167,8 +176,8 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(_model.ToUpdate())).LeftToSeq() :
+                (await _mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(_model.ToCreate())).LeftToSeq();
+                (await _mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>

ErsatzTV/Pages/FillerPresetEditor.razor

@@ -9,6 +9,8 @@
 @using ErsatzTV.Application.MediaItems
 @using ErsatzTV.Core.Domain.Filler
 @using Microsoft.AspNetCore.Components
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<FillerPresetEditor> _logger
 @inject ISnackbar _snackbar
@@ -134,6 +136,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     [Parameter]
     public int Id { get; set; }
     
@@ -148,24 +152,30 @@
     private List<NamedMediaItemViewModel> _televisionSeasons;
     private List<NamedMediaItemViewModel> _artists;
     
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+    
     protected override async Task OnParametersSetAsync()
     {
-        _mediaCollections = await _mediator.Send(new GetAllCollections())
+        _mediaCollections = await _mediator.Send(new GetAllCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _multiCollections = await _mediator.Send(new GetAllMultiCollections())
+        _multiCollections = await _mediator.Send(new GetAllMultiCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _smartCollections = await _mediator.Send(new GetAllSmartCollections())
+        _smartCollections = await _mediator.Send(new GetAllSmartCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _televisionShows = await _mediator.Send(new GetAllTelevisionShows())
+        _televisionShows = await _mediator.Send(new GetAllTelevisionShows(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _televisionSeasons = await _mediator.Send(new GetAllTelevisionSeasons())
+        _televisionSeasons = await _mediator.Send(new GetAllTelevisionSeasons(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _artists = await _mediator.Send(new GetAllArtists())
+        _artists = await _mediator.Send(new GetAllArtists(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
 
         if (IsEdit)
         {
-            Option<FillerPresetViewModel> maybeFillerPreset = await _mediator.Send(new GetFillerPresetById(Id));
+            Option<FillerPresetViewModel> maybeFillerPreset = await _mediator.Send(new GetFillerPresetById(Id), _cts.Token);
             maybeFillerPreset.IfSome(fillerPreset =>
             {
                 _model.Id = fillerPreset.Id;
@@ -212,7 +222,7 @@
         {
             IRequest<Either<BaseError, LanguageExt.Unit>> request = IsEdit ? _model.ToEdit() : _model.ToUpdate();
 
-            Seq<BaseError> errorMessage = await _mediator.Send(request)
+            Seq<BaseError> errorMessage = await _mediator.Send(request, _cts.Token)
                 .Map(result => result.LeftToSeq());
 
             errorMessage.HeadOrNone().Match(

ErsatzTV/Pages/FillerPresets.razor

@@ -5,6 +5,8 @@
 @using ErsatzTV.Application.Filler.Commands
 @using ErsatzTV.Application.Filler.Queries
 @using ErsatzTV.Core.Domain.Filler
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 
@@ -69,13 +71,21 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<FillerPresetViewModel> _fillerPresetsTable;
 
     private int _fillerPresetsRowsPerPage;
     
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
-        _fillerPresetsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.FillerPresetsPageSize))
+        _fillerPresetsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.FillerPresetsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
     }
     
@@ -88,16 +98,17 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteFillerPreset(fillerPreset.Id));
+            await _mediator.Send(new DeleteFillerPreset(fillerPreset.Id), _cts.Token);
             await _fillerPresetsTable.ReloadServerData();
         }
     }
 
     private async Task<TableData<FillerPresetViewModel>> ServerReloadFillerPresets(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.FillerPresetsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.FillerPresetsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        PagedFillerPresetsViewModel data = await _mediator.Send(new GetPagedFillerPresets(state.Page, state.PageSize));
+        PagedFillerPresetsViewModel data = await _mediator.Send(new GetPagedFillerPresets(state.Page, state.PageSize), _cts.Token);
         return new TableData<FillerPresetViewModel> { TotalItems = data.TotalCount, Items = data.Page };
     }
+
 }

ErsatzTV/Pages/FragmentNavigationBase.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Extensions;
 using Microsoft.AspNetCore.Components;
@@ -10,13 +11,23 @@ namespace ErsatzTV.Pages
 {
     public class FragmentNavigationBase : ComponentBase, IDisposable
     {
+        private readonly CancellationTokenSource _cts = new();
+
+        protected CancellationToken CancellationToken => _cts.Token;
+        
         [Inject]
         private NavigationManager NavManager { get; set; }
 
         [Inject]
         private IJSRuntime JsRuntime { get; set; }
 
-        public void Dispose() => NavManager.LocationChanged -= TryFragmentNavigation;
+        public void Dispose()
+        {
+            NavManager.LocationChanged -= TryFragmentNavigation;
+
+            _cts?.Cancel();
+            _cts?.Dispose();
+        }
 
         protected override void OnInitialized() => NavManager.LocationChanged += TryFragmentNavigation;
 

ErsatzTV/Pages/Index.razor

@@ -1,9 +1,11 @@
 @page "/"
 @using Microsoft.Extensions.Caching.Memory
 @using System.Reflection
+@using System.Threading
 @using ErsatzTV.Application.Health.Queries
 @using ErsatzTV.Core.Health
 @using ErsatzTV.Core.Interfaces.GitHub
+@implements IDisposable
 @inject IGitHubApiClient _gitHubApiClient
 @inject IMemoryCache _memoryCache
 @inject IMediator _mediator
@@ -71,9 +73,16 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     private string _releaseNotes;
     private MudTable<HealthCheckResult> _table;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
@@ -101,12 +110,12 @@
                                 gitHubVersion = $"v{gitHubVersion}";
                             }
 
-                            maybeNotes = await _gitHubApiClient.GetReleaseNotes(gitHubVersion);
+                            maybeNotes = await _gitHubApiClient.GetReleaseNotes(gitHubVersion, _cts.Token);
                             maybeNotes.IfRight(notes => _releaseNotes = notes);
                         }
                         else
                         {
-                            maybeNotes = await _gitHubApiClient.GetLatestReleaseNotes();
+                            maybeNotes = await _gitHubApiClient.GetLatestReleaseNotes(_cts.Token);
                             maybeNotes.IfRight(notes => _releaseNotes = notes);
                         }
                     }
@@ -126,7 +135,7 @@
     
     private async Task<TableData<HealthCheckResult>> ServerReload(TableState state)
     {
-        List<HealthCheckResult> healthCheckResults = await _mediator.Send(new GetAllHealthCheckResults());
+        List<HealthCheckResult> healthCheckResults = await _mediator.Send(new GetAllHealthCheckResults(), _cts.Token);
 
         return new TableData<HealthCheckResult>
         {

ErsatzTV/Pages/JellyfinLibrariesEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Jellyfin.Queries
 @using ErsatzTV.Application.MediaSources
 @using ErsatzTV.Application.Jellyfin
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ChannelWriter<IJellyfinBackgroundServiceRequest> _channel
 
@@ -16,20 +18,27 @@
     SynchronizeLibraryByIdIfNeeded="SynchronizeLibraryByIdIfNeeded"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private IRequest<Either<BaseError, Unit>> GetUpdateLibraryRequest(List<RemoteMediaSourceLibraryEditViewModel> libraries) =>
         new UpdateJellyfinLibraryPreferences(
             libraries.Map(l => new JellyfinLibraryPreference(l.Id, l.ShouldSyncItems)).ToList());
 
-    private Task<List<RemoteMediaSourceLibraryEditViewModel>> GetLibrariesBySourceId(int mediaSourceId) =>
+    private async Task<List<RemoteMediaSourceLibraryEditViewModel>> GetLibrariesBySourceId(int mediaSourceId) =>
-        _mediator.Send(new GetJellyfinLibrariesBySourceId(Id))
+        await _mediator.Send(new GetJellyfinLibrariesBySourceId(Id), _cts.Token)
             .Map(list => list.Map(ProjectToEditViewModel).OrderBy(x => x.MediaKind).ThenBy(x => x.Name).ToList());
 
-    private Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int mediaSourceId) =>
+    private async Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int mediaSourceId) =>
-        _mediator.Send(new GetJellyfinMediaSourceById(Id))
+        await _mediator.Send(new GetJellyfinMediaSourceById(Id), _cts.Token)
             .MapT(vm => new RemoteMediaSourceViewModel(vm.Id, vm.Name, vm.Address));
 
     private RemoteMediaSourceLibraryEditViewModel ProjectToEditViewModel(JellyfinLibraryViewModel library) => new()
@@ -42,7 +51,7 @@
 
     private async Task<Unit> SynchronizeLibraryByIdIfNeeded(int libraryId)
     {
-        await _channel.WriteAsync(new SynchronizeJellyfinLibraryByIdIfNeeded(libraryId));
+        await _channel.WriteAsync(new SynchronizeJellyfinLibraryByIdIfNeeded(libraryId), _cts.Token);
         return Unit.Default;
     }
 

ErsatzTV/Pages/JellyfinMediaSourceEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Core.Jellyfin
 @using ErsatzTV.Application.Jellyfin.Queries
 @using ErsatzTV.Application.Jellyfin.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject NavigationManager _navigationManager
 @inject ISnackbar _snackbar
@@ -14,10 +16,17 @@
     SaveSecrets="SaveSecrets"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private async Task<Unit> LoadSecrets(RemoteMediaSourceEditViewModel viewModel)
     {
-        JellyfinSecrets secrets = await _mediator.Send(new GetJellyfinSecrets());
+        JellyfinSecrets secrets = await _mediator.Send(new GetJellyfinSecrets(), _cts.Token);
         viewModel.Address = secrets.Address;
         viewModel.ApiKey = secrets.ApiKey;
         return Unit.Default;
@@ -26,7 +35,7 @@
     private async Task<Either<BaseError, Unit>> SaveSecrets(RemoteMediaSourceEditViewModel viewModel)
     {
         var secrets = new JellyfinSecrets { Address = viewModel.Address, ApiKey = viewModel.ApiKey };
-        return await _mediator.Send(new SaveJellyfinSecrets(secrets));
+        return await _mediator.Send(new SaveJellyfinSecrets(secrets), _cts.Token);
     }
 
 }

ErsatzTV/Pages/JellyfinMediaSources.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Core.Interfaces.Jellyfin
 @using ErsatzTV.Application.Jellyfin.Commands
 @using ErsatzTV.Application.Jellyfin.Queries
+@using System.Threading
+@implements IDisposable
 @inject IJellyfinSecretStore _jellyfinSecretStore
 @inject ChannelWriter<IJellyfinBackgroundServiceRequest> _channel
 
@@ -16,8 +18,15 @@
     SecretStore="@_jellyfinSecretStore"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private async Task RefreshLibraries(int mediaSourceId) =>
-        await _channel.WriteAsync(new SynchronizeJellyfinLibraries(mediaSourceId));
+        await _channel.WriteAsync(new SynchronizeJellyfinLibraries(mediaSourceId), _cts.Token);
 
 }

ErsatzTV/Pages/JellyfinPathReplacementsEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Jellyfin
 @using ErsatzTV.Application.Jellyfin.Commands
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ScheduleItemsEditor> _logger
 @inject ISnackbar _snackbar
@@ -17,16 +19,23 @@
     GetPathReplacementsBySourceId="GetPathReplacementsBySourceId"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
 
-    private Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int id) =>
+    public void Dispose()
-        _mediator.Send(new GetJellyfinMediaSourceById(Id))
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
+    private async Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int id) =>
+        await _mediator.Send(new GetJellyfinMediaSourceById(Id), _cts.Token)
             .MapT(vm => new RemoteMediaSourceViewModel(vm.Id, vm.Name, vm.Address));
 
-    private Task<List<RemoteMediaSourcePathReplacementEditViewModel>> GetPathReplacementsBySourceId(int mediaSourceId) =>
+    private async Task<List<RemoteMediaSourcePathReplacementEditViewModel>> GetPathReplacementsBySourceId(int mediaSourceId) =>
-        _mediator.Send(new GetJellyfinPathReplacementsBySourceId(Id))
+        await _mediator.Send(new GetJellyfinPathReplacementsBySourceId(Id), _cts.Token)
             .Map(list => list.Map(ProjectToEditViewModel).ToList());
 
     private RemoteMediaSourcePathReplacementEditViewModel ProjectToEditViewModel(JellyfinPathReplacementViewModel item) =>

ErsatzTV/Pages/Libraries.razor

@@ -78,6 +78,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private IList<LibraryViewModel> _libraries;
     private Dictionary<int, int> _progressByLibrary;
 
@@ -87,11 +89,11 @@
         _courier.Subscribe<LibraryScanProgress>(HandleScanProgress);
     }
 
-    protected override async Task OnParametersSetAsync() => await LoadLibraries();
+    protected override async Task OnParametersSetAsync() => await LoadLibraries(_cts.Token);
 
-    private async Task LoadLibraries()
+    private async Task LoadLibraries(CancellationToken cancellationToken)
     {
-        _libraries = await _mediator.Send(new GetConfiguredLibraries());
+        _libraries = await _mediator.Send(new GetConfiguredLibraries(), cancellationToken);
         _progressByLibrary = _libraries.ToDictionary(vm => vm.Id, _ => 0);
     }
 
@@ -102,16 +104,16 @@
             switch (library)
             {
                 case LocalLibraryViewModel:
-                    await _workerChannel.WriteAsync(new ForceScanLocalLibrary(library.Id));
+                    await _workerChannel.WriteAsync(new ForceScanLocalLibrary(library.Id), _cts.Token);
                     break;
                 case PlexLibraryViewModel:
-                    await _plexWorkerChannel.WriteAsync(new ForceSynchronizePlexLibraryById(library.Id));
+                    await _plexWorkerChannel.WriteAsync(new ForceSynchronizePlexLibraryById(library.Id), _cts.Token);
                     break;
                 case JellyfinLibraryViewModel:
-                    await _jellyfinWorkerChannel.WriteAsync(new ForceSynchronizeJellyfinLibraryById(library.Id));
+                    await _jellyfinWorkerChannel.WriteAsync(new ForceSynchronizeJellyfinLibraryById(library.Id), _cts.Token);
                     break;
                 case EmbyLibraryViewModel:
-                    await _embyWorkerChannel.WriteAsync(new ForceSynchronizeEmbyLibraryById(library.Id));
+                    await _embyWorkerChannel.WriteAsync(new ForceSynchronizeEmbyLibraryById(library.Id), _cts.Token);
                     break;
             }
 
@@ -142,6 +144,9 @@
     {
         _locker.OnLibraryChanged -= LockChanged;
         _courier.UnSubscribe<LibraryScanProgress>(HandleScanProgress);
+        
+        _cts.Cancel();
+        _cts.Dispose();
     }
 
 }

ErsatzTV/Pages/LocalLibraries.razor

@@ -2,6 +2,7 @@
 @using ErsatzTV.Application.Libraries
 @using ErsatzTV.Application.Libraries.Commands
 @using ErsatzTV.Application.Libraries.Queries
+@using System.Threading
 @implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
@@ -53,6 +54,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private IList<LocalLibraryViewModel> _libraries;
 
     protected override void OnInitialized()
@@ -60,11 +63,11 @@
         _locker.OnLibraryChanged += LockChanged;
     }
 
-    protected override async Task OnParametersSetAsync() => await LoadLibraries();
+    protected override async Task OnParametersSetAsync() => await LoadLibraries(_cts.Token);
 
-    private async Task LoadLibraries()
+    private async Task LoadLibraries(CancellationToken cancellationToken)
     {
-        _libraries = await _mediator.Send(new GetAllLocalLibraries());
+        _libraries = await _mediator.Send(new GetAllLocalLibraries(), cancellationToken);
     }
 
     private void LockChanged(object sender, EventArgs e) =>
@@ -72,7 +75,7 @@
 
     private async Task DeleteLibrary(LocalLibraryViewModel library)
     {
-        int count = await _mediator.Send(new CountMediaItemsByLibrary(library.Id));
+        int count = await _mediator.Send(new CountMediaItemsByLibrary(library.Id), _cts.Token);
         var parameters = new DialogParameters
         {
             { "EntityType", "library" },
@@ -86,14 +89,17 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteLocalLibrary(library.Id));
+            await _mediator.Send(new DeleteLocalLibrary(library.Id), _cts.Token);
-            await LoadLibraries();
+            await LoadLibraries(_cts.Token);
         }
     }
 
     void IDisposable.Dispose()
     {
         _locker.OnLibraryChanged -= LockChanged;
+        
+        _cts.Cancel();
+        _cts.Dispose();
     }
 
 }

ErsatzTV/Pages/LocalLibraryEditor.razor

@@ -4,6 +4,7 @@
 @using ErsatzTV.Application.Libraries.Commands
 @using ErsatzTV.Application.Libraries.Queries
 @using Unit = LanguageExt.Unit
+@using System.Threading
 @implements IDisposable
 @inject IDialogService _dialog
 @inject IEntityLocker _locker
@@ -76,6 +77,7 @@
 
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -91,7 +93,7 @@
     {
         if (IsEdit)
         {
-            Option<LocalLibraryViewModel> maybeLibrary = await _mediator.Send(new GetLocalLibraryById(Id));
+            Option<LocalLibraryViewModel> maybeLibrary = await _mediator.Send(new GetLocalLibraryById(Id), _cts.Token);
             await maybeLibrary.Match(
                 async library =>
                 {
@@ -130,7 +132,7 @@
     private async Task LoadLibraryPaths()
     {
         _model.HasChanges = false;
-        _model.Paths = await _mediator.Send(new GetLocalLibraryPaths(Id))
+        _model.Paths = await _mediator.Send(new GetLocalLibraryPaths(Id), _cts.Token)
             .Map(list => list.Map(vm => new LocalLibraryPathEditViewModel
             {
                 Id = vm.Id,
@@ -148,7 +150,7 @@
         if (!result.Cancelled && result.Data is LocalLibraryViewModel library)
         {
             var request = new MoveLocalLibraryPath(libraryPath.Id, library.Id);
-            Either<BaseError, Unit> moveResult = await _mediator.Send(request);
+            Either<BaseError, Unit> moveResult = await _mediator.Send(request, _cts.Token);
             moveResult.Match(
                 _ => _navigationManager.NavigateTo($"/media/sources/local/{library.Id}/edit"),
                 error =>
@@ -167,7 +169,7 @@
             _model.Paths.Remove(libraryPath);
         }
         
-        int count = await _mediator.Send(new CountMediaItemsByLibraryPath(libraryPath.Id));
+        int count = await _mediator.Send(new CountMediaItemsByLibraryPath(libraryPath.Id), _cts.Token);
         var parameters = new DialogParameters
         {
             { "EntityType", "library path" },
@@ -209,11 +211,11 @@
                 ? await _mediator.Send(new UpdateLocalLibrary(
                     _model.Id,
                     _model.Name,
-                    _model.Paths.Map(p => new UpdateLocalLibraryPath(p.Id, p.Path)).ToList()))
+                    _model.Paths.Map(p => new UpdateLocalLibraryPath(p.Id, p.Path)).ToList()), _cts.Token)
                 : await _mediator.Send(new CreateLocalLibrary(
                     _model.Name,
                     _model.MediaKind,
-                    _model.Paths.Map(p => p.Path).ToList()));
+                    _model.Paths.Map(p => p.Path).ToList()), _cts.Token);
 
             result.Match(
                 _ => _navigationManager.NavigateTo("/media/sources/local"),
@@ -235,6 +237,9 @@
     void IDisposable.Dispose()
     {
         _locker.OnLibraryChanged -= LockChanged;
+        
+        _cts.Cancel();
+        _cts.Dispose();
     }
 
 }

ErsatzTV/Pages/LocalLibraryPathEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Application.Libraries.Commands
 @using ErsatzTV.Application.Libraries.Queries
 @using ErsatzTV.Application.MediaSources.Commands
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<LocalLibraryPathEditor> _logger
 @inject ISnackbar _snackbar
@@ -32,6 +34,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -41,10 +44,16 @@
     private ValidationMessageStore _messageStore;
 
     private LocalLibraryViewModel _library;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        Option<LocalLibraryViewModel> maybeLibrary = await _mediator.Send(new GetLocalLibraryById(Id));
+        Option<LocalLibraryViewModel> maybeLibrary = await _mediator.Send(new GetLocalLibraryById(Id), _cts.Token);
         maybeLibrary.Match(
             library => _library = library,
             () => _navigationManager.NavigateTo("404"));
@@ -62,7 +71,7 @@
         if (_editContext.Validate())
         {
             var command = new CreateLocalLibraryPath(_library.Id, _model.Path);
-            Either<BaseError, LocalLibraryPathViewModel> result = await _mediator.Send(command);
+            Either<BaseError, LocalLibraryPathViewModel> result = await _mediator.Send(command, _cts.Token);
             await result.Match(
                 Left: error =>
                 {
@@ -74,7 +83,7 @@
                 {
                     if (_locker.LockLibrary(_library.Id))
                     {
-                        await _channel.WriteAsync(new ScanLocalLibraryIfNeeded(_library.Id));
+                        await _channel.WriteAsync(new ScanLocalLibraryIfNeeded(_library.Id), _cts.Token);
                         _navigationManager.NavigateTo("/media/libraries");
                     }
                 });

ErsatzTV/Pages/Logs.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Application.Logs.Queries
 @using ErsatzTV.Application.Configuration.Queries
 @using ErsatzTV.Application.Configuration.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 
 <MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
@@ -36,15 +38,24 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<LogEntryViewModel> _table;
     private int _rowsPerPage;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
-    protected override async Task OnParametersSetAsync() => _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.LogsPageSize))
+    protected override async Task OnParametersSetAsync() => _rowsPerPage =
+        await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.LogsPageSize), _cts.Token)
         .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
 
     private async Task<TableData<LogEntryViewModel>> ServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.LogsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.LogsPageSize, state.PageSize.ToString()), _cts.Token);
 
         PagedLogEntriesViewModel data;
 
@@ -57,7 +68,7 @@
                     SortDescending = state.SortDirection == SortDirection.None
                         ? Option<bool>.None
                         : state.SortDirection == SortDirection.Descending
-                });
+                }, _cts.Token);
                 break;
             case "level":
                 data = await _mediator.Send(new GetRecentLogEntries(state.Page, state.PageSize)
@@ -66,13 +77,13 @@
                     SortDescending = state.SortDirection == SortDirection.None
                         ? Option<bool>.None
                         : state.SortDirection == SortDirection.Descending
-                });
+                }, _cts.Token);
                 break;
             default:
                 data = await _mediator.Send(new GetRecentLogEntries(state.Page, state.PageSize)
                 {
                     SortDescending = Option<bool>.None
-                });
+                }, _cts.Token);
                 break;
         }
 

ErsatzTV/Pages/Movie.razor

@@ -6,6 +6,8 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
 @using ErsatzTV.Extensions
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject IDialogService _dialog
 @inject NavigationManager _navigationManager
@@ -187,6 +189,7 @@
 }
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int MovieId { get; set; }
@@ -200,10 +203,16 @@
     private List<string> _sortedGenres = new();
     private List<string> _sortedTags = new();
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override Task OnParametersSetAsync() => RefreshData();
 
-    private Task RefreshData() =>
+    private async Task RefreshData() =>
-        _mediator.Send(new GetMovieById(MovieId)).IfSomeAsync(vm =>
+        await _mediator.Send(new GetMovieById(MovieId), _cts.Token).IfSomeAsync(vm =>
         {
             _movie = vm;
             _sortedContentRatings = _movie.ContentRatings.OrderBy(cr => cr).ToList();
@@ -224,7 +233,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
-            await _mediator.Send(new AddMovieToCollection(collection.Id, MovieId));
+            await _mediator.Send(new AddMovieToCollection(collection.Id, MovieId), _cts.Token);
             _navigationManager.NavigateTo($"/media/collections/{collection.Id}");
         }
     }

ErsatzTV/Pages/MovieList.razor

@@ -1,7 +1,6 @@
 @page "/media/movies"
 @page "/media/movies/page/{PageNumber:int}"
 @using LanguageExt.UnsafeValueAccess
-@using Microsoft.AspNetCore.WebUtilities
 @using ErsatzTV.Application.MediaCards
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
@@ -81,7 +80,7 @@
 
     private MovieCardResultsViewModel _data;
     private string _query;
-
+    
     protected override Task OnParametersSetAsync()
     {
         if (PageNumber == 0)
@@ -96,12 +95,12 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:movie" : $"type:movie AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexMovies(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexMovies(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
     {
-        var uri = $"/media/movies/page/{PageNumber - 1}";
+        string uri = $"/media/movies/page/{PageNumber - 1}";
         if (!string.IsNullOrWhiteSpace(_query))
         {
             (string key, string value) = _query.EncodeQuery();
@@ -112,7 +111,7 @@
 
     private void NextPage()
     {
-        var uri = $"/media/movies/page/{PageNumber + 1}";
+        string uri = $"/media/movies/page/{PageNumber + 1}";
         if (!string.IsNullOrWhiteSpace(_query))
         {
             (string key, string value) = _query.EncodeQuery();
@@ -143,7 +142,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddMovieToCollection(collection.Id, movie.MovieId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/MultiCollectionEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
 @using ErsatzTV.Application.MediaCollections.Queries
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject NavigationManager _navigationManager
 @inject ISnackbar _snackbar
@@ -104,6 +106,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     [Parameter]
     public int Id { get; set; }
 
@@ -117,17 +121,23 @@
     private MudSelect<MediaCollectionViewModel> _collectionSelect;
     private MudSelect<SmartCollectionViewModel> _smartCollectionSelect;
     
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
-        _collections = await _mediator.Send(new GetAllCollections())
+        _collections = await _mediator.Send(new GetAllCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
 
-        _smartCollections = await _mediator.Send(new GetAllSmartCollections())
+        _smartCollections = await _mediator.Send(new GetAllSmartCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
 
         if (IsEdit)
         {
-            Option<MultiCollectionViewModel> maybeCollection = await _mediator.Send(new GetMultiCollectionById(Id));
+            Option<MultiCollectionViewModel> maybeCollection = await _mediator.Send(new GetMultiCollectionById(Id), _cts.Token);
             maybeCollection.IfSome(collection =>
             {
                 _model.Id = collection.Id;
@@ -170,8 +180,8 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(new UpdateMultiCollection(Id, _model.Name, GetUpdateItems()))).LeftToSeq() :
+                (await _mediator.Send(new UpdateMultiCollection(Id, _model.Name, GetUpdateItems()), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(new CreateMultiCollection(_model.Name, GetCreateItems()))).LeftToSeq();
+                (await _mediator.Send(new CreateMultiCollection(_model.Name, GetCreateItems()), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>

ErsatzTV/Pages/MultiSelectBase.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using ErsatzTV.Application.MediaCards;
 using ErsatzTV.Application.MediaCollections;
@@ -137,7 +138,7 @@ namespace ErsatzTV.Pages
                     otherVideoIds,
                     songIds);
 
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -173,7 +174,8 @@ namespace ErsatzTV.Pages
                     new RemoveItemsFromCollection(collectionId)
                     {
                         MediaItemIds = itemIds
-                    });
+                    },
+                    CancellationToken);
 
                 await RefreshData();
                 ClearSelection();

ErsatzTV/Pages/MusicVideoList.razor

@@ -97,7 +97,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:music_video" : $"type:music_video AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexMusicVideos(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexMusicVideos(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -144,7 +144,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddMusicVideoToCollection(collection.Id, musicVideo.MusicVideoId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/OtherVideoList.razor

@@ -96,7 +96,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:other_video" : $"type:other_video AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexOtherVideos(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexOtherVideos(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -143,7 +143,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddOtherVideoToCollection(collection.Id, otherVideo.OtherVideoId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/PlayoutEditor.razor

@@ -3,6 +3,8 @@
 @using ErsatzTV.Application.Channels.Queries
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.ProgramSchedules.Queries
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<PlayoutEditor> _logger
 @inject ISnackbar _snackbar
@@ -48,6 +50,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     private readonly PlayoutEditViewModel _model = new();
     private List<ChannelViewModel> _channels;
@@ -55,12 +58,18 @@
 
     private EditContext _editContext;
     private ValidationMessageStore _messageStore;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        _channels = await _mediator.Send(new GetAllChannels())
+        _channels = await _mediator.Send(new GetAllChannels(), _cts.Token)
             .Map(list => list.OrderBy(vm => decimal.Parse(vm.Number)).ToList());
-        _programSchedules = await _mediator.Send(new GetAllProgramSchedules())
+        _programSchedules = await _mediator.Send(new GetAllProgramSchedules(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name).ToList());
     }
 
@@ -75,7 +84,7 @@
         _messageStore.Clear();
         if (_editContext.Validate())
         {
-            Seq<BaseError> errorMessage = (await _mediator.Send(_model.ToCreate())).LeftToSeq();
+            Seq<BaseError> errorMessage = (await _mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>

ErsatzTV/Pages/Playouts.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Playouts.Queries
 @using ErsatzTV.Application.Configuration.Commands
 @using ErsatzTV.Application.Configuration.Queries
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 
@@ -99,6 +101,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<PlayoutNameViewModel> _table;
     private MudTable<PlayoutItemViewModel> _detailTable;
     private int _rowsPerPage;
@@ -118,14 +122,20 @@
             }
         }
     }
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsPageSize))
+        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
-        _detailRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsDetailPageSize))
+        _detailRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsDetailPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
-        _showFiller = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsDetailShowFiller))
+        _showFiller = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.PlayoutsDetailShowFiller), _cts.Token)
             .Map(maybeShow => maybeShow.Match(ce => bool.TryParse(ce.Value, out bool show) && show, () => false));
     }
 
@@ -152,7 +162,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeletePlayout(playout.PlayoutId));
+            await _mediator.Send(new DeletePlayout(playout.PlayoutId), _cts.Token);
             await _table.ReloadServerData();
             if (_selectedPlayoutId == playout.PlayoutId)
             {
@@ -163,7 +173,7 @@
 
     private async Task RebuildPlayout(PlayoutNameViewModel playout)
     {
-        await _mediator.Send(new BuildPlayout(playout.PlayoutId, true));
+        await _mediator.Send(new BuildPlayout(playout.PlayoutId, true), _cts.Token);
         await _table.ReloadServerData();
         if (_selectedPlayoutId == playout.PlayoutId)
         {
@@ -188,9 +198,9 @@
 
     private async Task<TableData<PlayoutNameViewModel>> ServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        List<PlayoutNameViewModel> playouts = await _mediator.Send(new GetAllPlayouts());
+        List<PlayoutNameViewModel> playouts = await _mediator.Send(new GetAllPlayouts(), _cts.Token);
         IOrderedEnumerable<PlayoutNameViewModel> sorted = playouts.OrderBy(p => decimal.Parse(p.ChannelNumber));
 
         // TODO: properly page this data
@@ -203,13 +213,13 @@
 
     private async Task<TableData<PlayoutItemViewModel>> DetailServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsDetailPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsDetailPageSize, state.PageSize.ToString()), _cts.Token);
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsDetailShowFiller, _showFiller.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.PlayoutsDetailShowFiller, _showFiller.ToString()), _cts.Token);
 
         if (_selectedPlayoutId.HasValue)
         {
             PagedPlayoutItemsViewModel data =
-                await _mediator.Send(new GetFuturePlayoutItemsById(_selectedPlayoutId.Value, _showFiller, state.Page, state.PageSize));
+                await _mediator.Send(new GetFuturePlayoutItemsById(_selectedPlayoutId.Value, _showFiller, state.Page, state.PageSize), _cts.Token);
             return new TableData<PlayoutItemViewModel>
             {
                 TotalItems = data.TotalCount,

ErsatzTV/Pages/PlexLibrariesEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Plex.Queries
 @using ErsatzTV.Application.MediaSources
 @using ErsatzTV.Application.Plex
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ChannelWriter<IPlexBackgroundServiceRequest> _channel
 
@@ -16,6 +18,7 @@
     SynchronizeLibraryByIdIfNeeded="SynchronizeLibraryByIdIfNeeded"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -24,14 +27,20 @@
         new UpdatePlexLibraryPreferences(
             libraries.Map(l => new PlexLibraryPreference(l.Id, l.ShouldSyncItems)).ToList());
 
-    private Task<List<RemoteMediaSourceLibraryEditViewModel>> GetLibrariesBySourceId(int mediaSourceId) =>
+    private async Task<List<RemoteMediaSourceLibraryEditViewModel>> GetLibrariesBySourceId(int mediaSourceId) =>
-        _mediator.Send(new GetPlexLibrariesBySourceId(Id))
+        await _mediator.Send(new GetPlexLibrariesBySourceId(Id), _cts.Token)
             .Map(list => list.Map(ProjectToEditViewModel).OrderBy(x => x.MediaKind).ThenBy(x => x.Name).ToList());
 
-    private Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int mediaSourceId) =>
+    private async Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int mediaSourceId) =>
-        _mediator.Send(new GetPlexMediaSourceById(Id))
+        await _mediator.Send(new GetPlexMediaSourceById(Id), _cts.Token)
             .MapT(vm => new RemoteMediaSourceViewModel(vm.Id, vm.Name, vm.Address));
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     private RemoteMediaSourceLibraryEditViewModel ProjectToEditViewModel(PlexLibraryViewModel library) => new()
     {
         Id = library.Id,
@@ -42,7 +51,7 @@
 
     private async Task<Unit> SynchronizeLibraryByIdIfNeeded(int libraryId)
     {
-        await _channel.WriteAsync(new SynchronizePlexLibraryByIdIfNeeded(libraryId));
+        await _channel.WriteAsync(new SynchronizePlexLibraryByIdIfNeeded(libraryId), _cts.Token);
         return Unit.Default;
     }
 

ErsatzTV/Pages/PlexMediaSources.razor

@@ -3,6 +3,7 @@
 @using ErsatzTV.Application.Plex
 @using ErsatzTV.Application.Plex.Commands
 @using ErsatzTV.Application.Plex.Queries
+@using System.Threading
 @implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator

ErsatzTV/Pages/PlexPathReplacementsEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Plex.Commands
 @using ErsatzTV.Application.Plex.Queries
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ScheduleItemsEditor> _logger
 @inject ISnackbar _snackbar
@@ -17,16 +19,23 @@
     GetPathReplacementsBySourceId="GetPathReplacementsBySourceId"/>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
-    private Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int id) =>
+    private async Task<Option<RemoteMediaSourceViewModel>> GetMediaSourceById(int id) =>
-        _mediator.Send(new GetPlexMediaSourceById(Id))
+        await _mediator.Send(new GetPlexMediaSourceById(Id), _cts.Token)
             .MapT(vm => new RemoteMediaSourceViewModel(vm.Id, vm.Name, vm.Address));
 
-    private Task<List<RemoteMediaSourcePathReplacementEditViewModel>> GetPathReplacementsBySourceId(int mediaSourceId) =>
+    private async Task<List<RemoteMediaSourcePathReplacementEditViewModel>> GetPathReplacementsBySourceId(int mediaSourceId) =>
-        _mediator.Send(new GetPlexPathReplacementsBySourceId(Id))
+        await _mediator.Send(new GetPlexPathReplacementsBySourceId(Id), _cts.Token)
             .Map(list => list.Map(ProjectToEditViewModel).ToList());
 
     private RemoteMediaSourcePathReplacementEditViewModel ProjectToEditViewModel(PlexPathReplacementViewModel item) =>

ErsatzTV/Pages/ScheduleEditor.razor

@@ -2,6 +2,8 @@
 @page "/schedules/add"
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.ProgramSchedules.Queries
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ScheduleEditor> _logger
 @inject ISnackbar _snackbar
@@ -50,6 +52,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -57,12 +60,18 @@
     private readonly ProgramScheduleEditViewModel _model = new();
     private EditContext _editContext;
     private ValidationMessageStore _messageStore;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
         if (IsEdit)
         {
-            Option<ProgramScheduleViewModel> maybeProgramSchedule = await _mediator.Send(new GetProgramScheduleById(Id));
+            Option<ProgramScheduleViewModel> maybeProgramSchedule = await _mediator.Send(new GetProgramScheduleById(Id), _cts.Token);
             maybeProgramSchedule.Match(
                 viewModel =>
                 {
@@ -93,9 +102,9 @@
         _messageStore.Clear();
         if (_editContext.Validate())
         {
-            Either<BaseError, EntityIdResult> result = IsEdit ?
+            Either<BaseError, EntityIdResult> result = IsEdit
-                await _mediator.Send(_model.ToUpdate()).MapT(r => r as EntityIdResult) :
+                ? await _mediator.Send(_model.ToUpdate(), _cts.Token).MapT(r => r as EntityIdResult)
-                await _mediator.Send(_model.ToCreate()).MapT(r => r as EntityIdResult);
+                : await _mediator.Send(_model.ToCreate(), _cts.Token).MapT(r => r as EntityIdResult);
 
             result.Match(
                 programSchedule =>

ErsatzTV/Pages/ScheduleItemsEditor.razor

@@ -10,6 +10,8 @@
 @using ErsatzTV.Application.Filler
 @using ErsatzTV.Application.Filler.Queries
 @using ErsatzTV.Core.Domain.Filler
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<ScheduleItemsEditor> _logger
 @inject ISnackbar _snackbar
@@ -289,6 +291,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -303,37 +306,43 @@
     private List<FillerPresetViewModel> _fillerPresets;
 
     private ProgramScheduleItemEditViewModel _selectedItem;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override Task OnParametersSetAsync() => LoadScheduleItems();
 
     private async Task LoadScheduleItems()
     {
     // TODO: fix performance
-        _mediaCollections = await _mediator.Send(new GetAllCollections())
+        _mediaCollections = await _mediator.Send(new GetAllCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _multiCollections = await _mediator.Send(new GetAllMultiCollections())
+        _multiCollections = await _mediator.Send(new GetAllMultiCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _smartCollections = await _mediator.Send(new GetAllSmartCollections())
+        _smartCollections = await _mediator.Send(new GetAllSmartCollections(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _televisionShows = await _mediator.Send(new GetAllTelevisionShows())
+        _televisionShows = await _mediator.Send(new GetAllTelevisionShows(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _televisionSeasons = await _mediator.Send(new GetAllTelevisionSeasons())
+        _televisionSeasons = await _mediator.Send(new GetAllTelevisionSeasons(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _artists = await _mediator.Send(new GetAllArtists())
+        _artists = await _mediator.Send(new GetAllArtists(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
-        _fillerPresets = await _mediator.Send(new GetAllFillerPresets())
+        _fillerPresets = await _mediator.Send(new GetAllFillerPresets(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase).ToList());
 
         string name = string.Empty;
         var shuffleScheduleItems = false;
-        Option<ProgramScheduleViewModel> maybeSchedule = await _mediator.Send(new GetProgramScheduleById(Id));
+        Option<ProgramScheduleViewModel> maybeSchedule = await _mediator.Send(new GetProgramScheduleById(Id), _cts.Token);
         foreach (ProgramScheduleViewModel schedule in maybeSchedule)
         {
             name = schedule.Name;
             shuffleScheduleItems = schedule.ShuffleScheduleItems;
         }
 
-        Option<IEnumerable<ProgramScheduleItemViewModel>> maybeResults = await _mediator.Send(new GetProgramScheduleItems(Id));
+        Option<IEnumerable<ProgramScheduleItemViewModel>> maybeResults = await _mediator.Send(new GetProgramScheduleItems(Id), _cts.Token);
         foreach (IEnumerable<ProgramScheduleItemViewModel> items in maybeResults)
         {
             _schedule = new ProgramScheduleItemsEditViewModel
@@ -450,7 +459,7 @@
             item.TailFiller?.Id,
             item.FallbackFiller?.Id)).ToList();
 
-        Seq<BaseError> errorMessages = await _mediator.Send(new ReplaceProgramScheduleItems(Id, items)).Map(e => e.LeftToSeq());
+        Seq<BaseError> errorMessages = await _mediator.Send(new ReplaceProgramScheduleItems(Id, items), _cts.Token).Map(e => e.LeftToSeq());
 
         errorMessages.HeadOrNone().Match(
             error =>

ErsatzTV/Pages/Schedules.razor

@@ -5,6 +5,8 @@
 @using ErsatzTV.Application.Configuration.Queries
 @using ErsatzTV.Application.Configuration.Commands
 @using NaturalSort.Extension
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 
@@ -90,17 +92,25 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<ProgramScheduleViewModel> _table;
     private MudTable<ProgramScheduleItemViewModel> _detailTable;
     private int _rowsPerPage;
     private int _detailRowsPerPage;
     private ProgramScheduleViewModel _selectedSchedule;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
-        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SchedulesPageSize))
+        _rowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SchedulesPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
-        _detailRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SchedulesDetailPageSize))
+        _detailRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.SchedulesDetailPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
     }
 
@@ -119,7 +129,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteProgramSchedule(programSchedule.Id));
+            await _mediator.Send(new DeleteProgramSchedule(programSchedule.Id), _cts.Token);
             await _table.ReloadServerData();
             if (_selectedSchedule == programSchedule)
             {
@@ -130,9 +140,9 @@
     
     private async Task<TableData<ProgramScheduleViewModel>> ServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SchedulesPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SchedulesPageSize, state.PageSize.ToString()), _cts.Token);
 
-        List<ProgramScheduleViewModel> schedules = await _mediator.Send(new GetAllProgramSchedules());
+        List<ProgramScheduleViewModel> schedules = await _mediator.Send(new GetAllProgramSchedules(), _cts.Token);
         IOrderedEnumerable<ProgramScheduleViewModel> sorted = schedules.OrderBy(s => s.Name, new NaturalSortComparer(StringComparison.CurrentCultureIgnoreCase));
 
         // TODO: properly page this data
@@ -145,9 +155,9 @@
 
     private async Task<TableData<ProgramScheduleItemViewModel>> DetailServerReload(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SchedulesDetailPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.SchedulesDetailPageSize, state.PageSize.ToString()), _cts.Token);
 
-        List<ProgramScheduleItemViewModel> scheduleItems = await _mediator.Send(new GetProgramScheduleItems(_selectedSchedule.Id));
+        List<ProgramScheduleItemViewModel> scheduleItems = await _mediator.Send(new GetProgramScheduleItems(_selectedSchedule.Id), _cts.Token);
         IOrderedEnumerable<ProgramScheduleItemViewModel> sorted = scheduleItems.OrderBy(s => s.Index);
 
         // TODO: properly page this data

ErsatzTV/Pages/Search.razor

@@ -333,14 +333,14 @@
         _query = _navigationManager.Uri.GetSearchQuery();
         if (!string.IsNullOrWhiteSpace(_query))
         {
-            _movies = await Mediator.Send(new QuerySearchIndexMovies($"type:movie AND ({_query})", 1, 50));
+            _movies = await Mediator.Send(new QuerySearchIndexMovies($"type:movie AND ({_query})", 1, 50), CancellationToken);
-            _shows = await Mediator.Send(new QuerySearchIndexShows($"type:show AND ({_query})", 1, 50));
+            _shows = await Mediator.Send(new QuerySearchIndexShows($"type:show AND ({_query})", 1, 50), CancellationToken);
-            _seasons = await Mediator.Send(new QuerySearchIndexSeasons($"type:season AND ({_query})", 1, 50));
+            _seasons = await Mediator.Send(new QuerySearchIndexSeasons($"type:season AND ({_query})", 1, 50), CancellationToken);
-            _episodes = await Mediator.Send(new QuerySearchIndexEpisodes($"type:episode AND ({_query})", 1, 50));
+            _episodes = await Mediator.Send(new QuerySearchIndexEpisodes($"type:episode AND ({_query})", 1, 50), CancellationToken);
-            _musicVideos = await Mediator.Send(new QuerySearchIndexMusicVideos($"type:music_video AND ({_query})", 1, 50));
+            _musicVideos = await Mediator.Send(new QuerySearchIndexMusicVideos($"type:music_video AND ({_query})", 1, 50), CancellationToken);
-            _otherVideos = await Mediator.Send(new QuerySearchIndexOtherVideos($"type:other_video AND ({_query})", 1, 50));
+            _otherVideos = await Mediator.Send(new QuerySearchIndexOtherVideos($"type:other_video AND ({_query})", 1, 50), CancellationToken);
-            _songs = await Mediator.Send(new QuerySearchIndexSongs($"type:song AND ({_query})", 1, 50));
+            _songs = await Mediator.Send(new QuerySearchIndexSongs($"type:song AND ({_query})", 1, 50), CancellationToken);
-            _artists = await Mediator.Send(new QuerySearchIndexArtists($"type:artist AND ({_query})", 1, 50));
+            _artists = await Mediator.Send(new QuerySearchIndexArtists($"type:artist AND ({_query})", 1, 50), CancellationToken);
         }
     }
 
@@ -374,7 +374,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddMovieToCollection(collection.Id, movie.MovieId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -395,7 +395,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddShowToCollection(collection.Id, show.TelevisionShowId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -416,7 +416,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddEpisodeToCollection(collection.Id, episode.EpisodeId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -437,7 +437,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddArtistToCollection(collection.Id, artist.ArtistId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -458,7 +458,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddMusicVideoToCollection(collection.Id, musicVideo.MusicVideoId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -479,7 +479,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddOtherVideoToCollection(collection.Id, otherVideo.OtherVideoId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {
@@ -581,7 +581,7 @@
 
     private async Task AddAllToCollection(MouseEventArgs _)
     {
-        SearchResultAllItemsViewModel results = await Mediator.Send(new QuerySearchIndexAllItems(_query));
+        SearchResultAllItemsViewModel results = await Mediator.Send(new QuerySearchIndexAllItems(_query), CancellationToken);
         await AddItemsToCollection(
             results.MovieIds,
             results.ShowIds,
@@ -606,7 +606,7 @@
                 collection.Id,
                 _query);
 
-            Either<BaseError, Unit> updateResult = await Mediator.Send(request);
+            Either<BaseError, Unit> updateResult = await Mediator.Send(request, CancellationToken);
             updateResult.Match(
                 Left: error =>
                 {

ErsatzTV/Pages/Settings.razor

@@ -16,6 +16,8 @@
 @using ErsatzTV.Core.Domain.Filler
 @using ErsatzTV.Core.FFmpeg
 @using Microsoft.AspNetCore.Components
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ISnackbar _snackbar
 @inject ILogger<Settings> _logger
@@ -177,6 +179,8 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private bool _success;
     private bool _hdhrSuccess;
     private bool _scannerSuccess;
@@ -189,22 +193,28 @@
     private int _tunerCount;
     private int _libraryRefreshInterval;
     private int _playoutDaysToBuild;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync()
     {
         await LoadFFmpegProfilesAsync();
 
-        _ffmpegSettings = await _mediator.Send(new GetFFmpegSettings());
+        _ffmpegSettings = await _mediator.Send(new GetFFmpegSettings(), _cts.Token);
         _success = File.Exists(_ffmpegSettings.FFmpegPath) && File.Exists(_ffmpegSettings.FFprobePath);
-        _availableCultures = await _mediator.Send(new GetAllLanguageCodes());
+        _availableCultures = await _mediator.Send(new GetAllLanguageCodes(), _cts.Token);
-        _watermarks = await _mediator.Send(new GetAllWatermarks());
+        _watermarks = await _mediator.Send(new GetAllWatermarks(), _cts.Token);
-        _fillerPresets = await _mediator.Send(new GetAllFillerPresets())
+        _fillerPresets = await _mediator.Send(new GetAllFillerPresets(), _cts.Token)
             .Map(list => list.Filter(fp => fp.FillerKind == FillerKind.Fallback).ToList());
-        _tunerCount = await _mediator.Send(new GetHDHRTunerCount());
+        _tunerCount = await _mediator.Send(new GetHDHRTunerCount(), _cts.Token);
         _hdhrSuccess = string.IsNullOrWhiteSpace(ValidateTunerCount(_tunerCount));
-        _libraryRefreshInterval = await _mediator.Send(new GetLibraryRefreshInterval());
+        _libraryRefreshInterval = await _mediator.Send(new GetLibraryRefreshInterval(), _cts.Token);
         _scannerSuccess = _libraryRefreshInterval > 0;
-        _playoutDaysToBuild = await _mediator.Send(new GetPlayoutDaysToBuild());
+        _playoutDaysToBuild = await _mediator.Send(new GetPlayoutDaysToBuild(), _cts.Token);
         _playoutSuccess = _playoutDaysToBuild > 0;
     }
 
@@ -223,11 +233,11 @@
     private static string ValidateInitialSegmentCount(int count) => count < 1 ? "HLS Segmenter initial segment count must be greater than or equal to 1" : null;
 
     private async Task LoadFFmpegProfilesAsync() =>
-        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles());
+        _ffmpegProfiles = await _mediator.Send(new GetAllFFmpegProfiles(), _cts.Token);
 
     private async Task SaveFFmpegSettings()
     {
-        Either<BaseError, Unit> result = await _mediator.Send(new UpdateFFmpegSettings(_ffmpegSettings));
+        Either<BaseError, Unit> result = await _mediator.Send(new UpdateFFmpegSettings(_ffmpegSettings), _cts.Token);
         result.Match(
             Left: error =>
             {
@@ -239,7 +249,7 @@
 
     private async Task SaveHDHRSettings()
     {
-        Either<BaseError, Unit> result = await _mediator.Send(new UpdateHDHRTunerCount(_tunerCount));
+        Either<BaseError, Unit> result = await _mediator.Send(new UpdateHDHRTunerCount(_tunerCount), _cts.Token);
         result.Match(
             Left: error =>
             {
@@ -251,7 +261,7 @@
 
     private async Task SaveScannerSettings()
     {
-        Either<BaseError, Unit> result = await _mediator.Send(new UpdateLibraryRefreshInterval(_libraryRefreshInterval));
+        Either<BaseError, Unit> result = await _mediator.Send(new UpdateLibraryRefreshInterval(_libraryRefreshInterval), _cts.Token);
         result.Match(
             Left: error =>
             {
@@ -263,7 +273,7 @@
 
     private async Task SavePlayoutSettings()
     {
-        Either<BaseError, Unit> result = await _mediator.Send(new UpdatePlayoutDaysToBuild(_playoutDaysToBuild));
+        Either<BaseError, Unit> result = await _mediator.Send(new UpdatePlayoutDaysToBuild(_playoutDaysToBuild), _cts.Token);
         result.Match(
             Left: error =>
             {

ErsatzTV/Pages/SongList.razor

@@ -96,7 +96,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:song" : $"type:song AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexSongs(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexSongs(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -143,7 +143,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddSongToCollection(collection.Id, song.SongId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/TelevisionEpisodeList.razor

@@ -9,6 +9,8 @@
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.ProgramSchedules.Commands
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ILogger<TelevisionEpisodeList> _logger
 @inject ISnackbar _snackbar
@@ -156,6 +158,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int SeasonId { get; set; }
@@ -166,6 +169,12 @@
     private readonly int _pageNumber = 1;
 
     private TelevisionEpisodeCardResultsViewModel _data;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
@@ -179,10 +188,10 @@
 
     private async Task RefreshData()
     {
-        await _mediator.Send(new GetTelevisionSeasonById(SeasonId))
+        await _mediator.Send(new GetTelevisionSeasonById(SeasonId), _cts.Token)
             .IfSomeAsync(vm => _season = vm);
 
-        _data = await _mediator.Send(new GetTelevisionEpisodeCards(SeasonId, _pageNumber, _pageSize));
+        _data = await _mediator.Send(new GetTelevisionEpisodeCards(SeasonId, _pageNumber, _pageSize), _cts.Token);
     }
 
     private async Task AddToCollection()
@@ -194,7 +203,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
-            await _mediator.Send(new AddSeasonToCollection(collection.Id, SeasonId));
+            await _mediator.Send(new AddSeasonToCollection(collection.Id, SeasonId), _cts.Token);
             _navigationManager.NavigateTo($"/media/collections/{collection.Id}");
         }
     }
@@ -209,7 +218,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is ProgramScheduleViewModel schedule)
         {
-            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.TelevisionSeason, null, null, null, SeasonId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null));
+            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.TelevisionSeason, null, null, null, SeasonId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null), _cts.Token);
             _navigationManager.NavigateTo($"/schedules/{schedule.Id}/items");
         }
     }
@@ -224,7 +233,7 @@
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
             var request = new AddEpisodeToCollection(collection.Id, episode.EpisodeId);
-            Either<BaseError, Unit> addResult = await _mediator.Send(request);
+            Either<BaseError, Unit> addResult = await _mediator.Send(request, _cts.Token);
             addResult.Match(
                 Left: error =>
                 {

ErsatzTV/Pages/TelevisionSeasonList.razor

@@ -10,6 +10,8 @@
 @using ErsatzTV.Application.ProgramSchedules.Commands
 @using ErsatzTV.Extensions
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ILogger<TelevisionSeasonList> _logger
 @inject ISnackbar _snackbar
@@ -168,6 +170,7 @@
 }
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int ShowId { get; set; }
@@ -183,12 +186,18 @@
     private readonly int _pageNumber = 1;
 
     private TelevisionSeasonCardResultsViewModel _data;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override Task OnParametersSetAsync() => RefreshData();
 
     private async Task RefreshData()
     {
-        await _mediator.Send(new GetTelevisionShowById(ShowId))
+        await _mediator.Send(new GetTelevisionShowById(ShowId), _cts.Token)
             .IfSomeAsync(vm =>
             {
                 _show = vm;
@@ -199,7 +208,7 @@
                 _sortedTags = _show.Tags.OrderBy(t => t).ToList();
             });
 
-        _data = await _mediator.Send(new GetTelevisionSeasonCards(ShowId, _pageNumber, _pageSize));
+        _data = await _mediator.Send(new GetTelevisionSeasonCards(ShowId, _pageNumber, _pageSize), _cts.Token);
     }
 
     private async Task AddToCollection()
@@ -211,7 +220,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
         {
-            await _mediator.Send(new AddShowToCollection(collection.Id, ShowId));
+            await _mediator.Send(new AddShowToCollection(collection.Id, ShowId), _cts.Token);
             _navigationManager.NavigateTo($"/media/collections/{collection.Id}");
         }
     }
@@ -225,7 +234,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled && result.Data is ProgramScheduleViewModel schedule)
         {
-            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.TelevisionShow, null, null, null, ShowId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null));
+            await _mediator.Send(new AddProgramScheduleItem(schedule.Id, StartType.Dynamic, null, PlayoutMode.One, ProgramScheduleItemCollectionType.TelevisionShow, null, null, null, ShowId, PlaybackOrder.Shuffle, null, null, TailMode.None, null, GuideMode.Normal, null, null, null, null, null), _cts.Token);
             _navigationManager.NavigateTo($"/schedules/{schedule.Id}/items");
         }
     }
@@ -242,7 +251,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddSeasonToCollection(collection.Id, season.TelevisionSeasonId);
-                Either<BaseError, Unit> addResult = await _mediator.Send(request);
+                Either<BaseError, Unit> addResult = await _mediator.Send(request, _cts.Token);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/TelevisionSeasonSearchResults.razor

@@ -95,7 +95,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:season" : $"type:season AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexSeasons(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexSeasons(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -142,7 +142,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddSeasonToCollection(collection.Id, season.TelevisionSeasonId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/TelevisionShowList.razor

@@ -95,7 +95,7 @@
     protected override async Task RefreshData()
     {
         string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:show" : $"type:show AND ({_query})";
-        _data = await Mediator.Send(new QuerySearchIndexShows(searchQuery, PageNumber, PageSize));
+        _data = await Mediator.Send(new QuerySearchIndexShows(searchQuery, PageNumber, PageSize), CancellationToken);
     }
 
     private void PrevPage()
@@ -142,7 +142,7 @@
             if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
             {
                 var request = new AddShowToCollection(collection.Id, show.TelevisionShowId);
-                Either<BaseError, Unit> addResult = await Mediator.Send(request);
+                Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
                 addResult.Match(
                     Left: error =>
                     {

ErsatzTV/Pages/TraktLists.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Configuration.Queries
 @using ErsatzTV.Application.Configuration.Commands
 @using ErsatzTV.Application.MediaCollections.Commands
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 @inject ISnackbar _snackbar
@@ -75,9 +77,17 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private MudTable<TraktListViewModel> _traktListsTable;
 
     private int _traktListsRowsPerPage;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override void OnInitialized()
     {
@@ -86,7 +96,7 @@
 
     protected override async Task OnParametersSetAsync()
     {
-        _traktListsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.TraktListsPageSize))
+        _traktListsRowsPerPage = await _mediator.Send(new GetConfigElementByKey(ConfigElementKey.TraktListsPageSize), _cts.Token)
             .Map(maybeRows => maybeRows.Match(ce => int.TryParse(ce.Value, out int rows) ? rows : 10, () => 10));
     }
 
@@ -104,7 +114,7 @@
     {
         if (_locker.LockTrakt())
         {
-            await _workerChannel.WriteAsync(new MatchTraktListItems(traktList.Id));
+            await _workerChannel.WriteAsync(new MatchTraktListItems(traktList.Id), _cts.Token);
         }
     }
 
@@ -119,16 +129,16 @@
             DialogResult result = await dialog.Result;
             if (!result.Cancelled)
             {
-                await _workerChannel.WriteAsync(new DeleteTraktList(traktList.Id));
+                await _workerChannel.WriteAsync(new DeleteTraktList(traktList.Id), _cts.Token);
             }
         }
     }
 
     private async Task<TableData<TraktListViewModel>> ServerReloadTraktLists(TableState state)
     {
-        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.TraktListsPageSize, state.PageSize.ToString()));
+        await _mediator.Send(new SaveConfigElementByKey(ConfigElementKey.TraktListsPageSize, state.PageSize.ToString()), _cts.Token);
 
-        PagedTraktListsViewModel data = await _mediator.Send(new GetPagedTraktLists(state.Page, state.PageSize));
+        PagedTraktListsViewModel data = await _mediator.Send(new GetPagedTraktLists(state.Page, state.PageSize), _cts.Token);
         return new TableData<TraktListViewModel> { TotalItems = data.TotalCount, Items = data.Page };
     }
     
@@ -141,7 +151,7 @@
             DialogResult result = await dialog.Result;
             if (!result.Cancelled && result.Data is string url)
             {
-                await _workerChannel.WriteAsync(new AddTraktList(url));
+                await _workerChannel.WriteAsync(new AddTraktList(url), _cts.Token);
             }
         }
     }

ErsatzTV/Pages/Trash.razor

@@ -327,14 +327,14 @@
         _query = "state:FileNotFound";
         if (!string.IsNullOrWhiteSpace(_query))
         {
-            _movies = await Mediator.Send(new QuerySearchIndexMovies($"type:movie AND ({_query})", 1, 50));
+            _movies = await Mediator.Send(new QuerySearchIndexMovies($"type:movie AND ({_query})", 1, 50), CancellationToken);
-            _shows = await Mediator.Send(new QuerySearchIndexShows($"type:show AND ({_query})", 1, 50));
+            _shows = await Mediator.Send(new QuerySearchIndexShows($"type:show AND ({_query})", 1, 50), CancellationToken);
-            _seasons = await Mediator.Send(new QuerySearchIndexSeasons($"type:season AND ({_query})", 1, 50));
+            _seasons = await Mediator.Send(new QuerySearchIndexSeasons($"type:season AND ({_query})", 1, 50), CancellationToken);
-            _episodes = await Mediator.Send(new QuerySearchIndexEpisodes($"type:episode AND ({_query})", 1, 50));
+            _episodes = await Mediator.Send(new QuerySearchIndexEpisodes($"type:episode AND ({_query})", 1, 50), CancellationToken);
-            _musicVideos = await Mediator.Send(new QuerySearchIndexMusicVideos($"type:music_video AND ({_query})", 1, 50));
+            _musicVideos = await Mediator.Send(new QuerySearchIndexMusicVideos($"type:music_video AND ({_query})", 1, 50), CancellationToken);
-            _otherVideos = await Mediator.Send(new QuerySearchIndexOtherVideos($"type:other_video AND ({_query})", 1, 50));
+            _otherVideos = await Mediator.Send(new QuerySearchIndexOtherVideos($"type:other_video AND ({_query})", 1, 50), CancellationToken);
-            _songs = await Mediator.Send(new QuerySearchIndexSongs($"type:song AND ({_query})", 1, 50));
+            _songs = await Mediator.Send(new QuerySearchIndexSongs($"type:song AND ({_query})", 1, 50), CancellationToken);
-            _artists = await Mediator.Send(new QuerySearchIndexArtists($"type:artist AND ({_query})", 1, 50));
+            _artists = await Mediator.Send(new QuerySearchIndexArtists($"type:artist AND ({_query})", 1, 50), CancellationToken);
         }
     }
 
@@ -486,7 +486,7 @@
                     .Append(songIds)
                     .ToList());
 
-            Either<BaseError, Unit> addResult = await Mediator.Send(request);
+            Either<BaseError, Unit> addResult = await Mediator.Send(request, CancellationToken);
             await addResult.Match(
                 Left: error =>
                 {
@@ -556,7 +556,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await Mediator.Send(request);
+            await Mediator.Send(request, CancellationToken);
             await RefreshData();
         }
     }

ErsatzTV/Pages/WatermarkEditor.razor

@@ -4,6 +4,8 @@
 @using ErsatzTV.Application.Watermarks
 @using ErsatzTV.Application.Watermarks.Queries
 @using ErsatzTV.FFmpeg.State
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<WatermarkEditor> _logger
 @inject ISnackbar _snackbar
@@ -146,7 +148,8 @@
 </MudContainer>
 
 @code {
-
+    private readonly CancellationTokenSource _cts = new();
+    
     [Parameter]
     public int Id { get; set; }
 
@@ -154,11 +157,17 @@
     private EditContext _editContext;
     private ValidationMessageStore _messageStore;
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+
     protected override async Task OnParametersSetAsync()
     {
         if (IsEdit)
         {
-            Option<WatermarkViewModel> watermark = await _mediator.Send(new GetWatermarkById(Id));
+            Option<WatermarkViewModel> watermark = await _mediator.Send(new GetWatermarkById(Id), _cts.Token);
             watermark.Match(
                 watermarkViewModel => _model = new WatermarkEditViewModel(watermarkViewModel),
                 () => _navigationManager.NavigateTo("404"));
@@ -193,8 +202,8 @@
         if (_editContext.Validate())
         {
             Seq<BaseError> errorMessage = IsEdit ?
-                (await _mediator.Send(_model.ToUpdate())).LeftToSeq() :
+                (await _mediator.Send(_model.ToUpdate(), _cts.Token)).LeftToSeq() :
-                (await _mediator.Send(_model.ToCreate())).LeftToSeq();
+                (await _mediator.Send(_model.ToCreate(), _cts.Token)).LeftToSeq();
 
             errorMessage.HeadOrNone().Match(
                 error =>
@@ -210,8 +219,9 @@
     {
         try
         {
-            Either<BaseError, string> maybeCacheFileName = await _mediator
+            Either<BaseError, string> maybeCacheFileName = await _mediator.Send(
-                .Send(new SaveArtworkToDisk(e.File.OpenReadStream(maxAllowedSize: 10 * 1024 * 1024), ArtworkKind.Watermark));
+                new SaveArtworkToDisk(e.File.OpenReadStream(maxAllowedSize: 10 * 1024 * 1024), ArtworkKind.Watermark),
+                _cts.Token);
             maybeCacheFileName.Match(
                 relativeFileName =>
                 {

ErsatzTV/Pages/Watermarks.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Application.Watermarks
 @using ErsatzTV.Application.Watermarks.Commands
 @using ErsatzTV.Application.Watermarks.Queries
+@using System.Threading
+@implements IDisposable
 @inject IDialogService _dialog
 @inject IMediator _mediator
 @inject ILogger<Watermarks> _logger
@@ -72,12 +74,20 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
+
     private List<WatermarkViewModel> _watermarks;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync() => await LoadWatermarksAsync();
 
     private async Task LoadWatermarksAsync() =>
-        _watermarks = await _mediator.Send(new GetAllWatermarks());
+        _watermarks = await _mediator.Send(new GetAllWatermarks(), _cts.Token);
 
     private async Task DeleteWatermarkAsync(WatermarkViewModel watermark)
     {
@@ -88,7 +98,7 @@
         DialogResult result = await dialog.Result;
         if (!result.Cancelled)
         {
-            await _mediator.Send(new DeleteWatermark(watermark.Id));
+            await _mediator.Send(new DeleteWatermark(watermark.Id), _cts.Token);
             await LoadWatermarksAsync();
         }
     }

ErsatzTV/Shared/AddToCollectionDialog.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
 @using ErsatzTV.Application.MediaCollections.Queries
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject IMemoryCache _memoryCache
 @inject ISnackbar _snackbar
@@ -39,6 +41,7 @@
 
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -65,13 +68,19 @@
     private record DummyModel;
 
     private readonly DummyModel _dummyModel = new();
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private bool CanSubmit() =>
         _selectedCollection != null && (_selectedCollection != _newCollection || !string.IsNullOrWhiteSpace(_newCollectionName));
 
     protected override async Task OnParametersSetAsync()
     {
-        _collections = await _mediator.Send(new GetAllCollections())
+        _collections = await _mediator.Send(new GetAllCollections(), _cts.Token)
             .Map(list => new[] { _newCollection }.Append(list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase)).ToList());
 
         if (_memoryCache.TryGetValue("AddToCollectionDialog.SelectedCollectionId", out int id))
@@ -96,7 +105,7 @@
         if (_selectedCollection == _newCollection)
         {
             Either<BaseError, MediaCollectionViewModel> maybeResult =
-                await _mediator.Send(new CreateCollection(_newCollectionName));
+                await _mediator.Send(new CreateCollection(_newCollectionName), _cts.Token);
 
             maybeResult.Match(
                 collection =>

ErsatzTV/Shared/AddToScheduleDialog.razor

@@ -1,6 +1,8 @@
 @using ErsatzTV.Application.ProgramSchedules
 @using ErsatzTV.Application.ProgramSchedules.Queries
 @using NaturalSort.Extension
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 
 <div @onkeydown="@OnKeyDown">
@@ -29,6 +31,7 @@
 </div>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -48,9 +51,15 @@
     private List<ProgramScheduleViewModel> _schedules;
 
     private ProgramScheduleViewModel _selectedSchedule;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync() =>
-        _schedules = await _mediator.Send(new GetAllProgramSchedules())
+        _schedules = await _mediator.Send(new GetAllProgramSchedules(), _cts.Token)
             .Map(list => list.OrderBy(vm => vm.Name, new NaturalSortComparer(StringComparison.CurrentCultureIgnoreCase)).ToList());
 
     private string FormatText() => $"Select the schedule to add the {EntityType} {EntityName}";

ErsatzTV/Shared/CopyFFmpegProfileDialog.razor

@@ -1,5 +1,7 @@
 @using ErsatzTV.Application.FFmpegProfiles
 @using ErsatzTV.Application.FFmpegProfiles.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ISnackbar _snackbar
 @inject ILogger<CopyFFmpegProfileDialog> _logger
@@ -27,6 +29,7 @@
 </MudDialog>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -40,6 +43,12 @@
 
     private string _newFFmpegProfileName;
 
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
+    
     private bool CanSubmit() => !string.IsNullOrWhiteSpace(_newFFmpegProfileName);
 
     private async Task Submit()
@@ -50,7 +59,7 @@
         }
 
         Either<BaseError, FFmpegProfileViewModel> maybeResult =
-            await _mediator.Send(new CopyFFmpegProfile(FFmpegProfileId, _newFFmpegProfileName));
+            await _mediator.Send(new CopyFFmpegProfile(FFmpegProfileId, _newFFmpegProfileName), _cts.Token);
 
         maybeResult.Match(
             ffmpegProfile => { MudDialog.Close(DialogResult.Ok(ffmpegProfile)); },

ErsatzTV/Shared/CopyWatermarkDialog.razor

@@ -1,5 +1,7 @@
 @using ErsatzTV.Application.Watermarks
 @using ErsatzTV.Application.Watermarks.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ISnackbar _snackbar
 @inject ILogger<CopyWatermarkDialog> _logger
@@ -27,6 +29,7 @@
 </MudDialog>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -39,6 +42,12 @@
     private readonly DummyModel _dummyModel = new();
 
     private string _newWatermarkName;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private bool CanSubmit() => !string.IsNullOrWhiteSpace(_newWatermarkName);
 
@@ -50,7 +59,7 @@
         }
 
         Either<BaseError, WatermarkViewModel> maybeResult =
-            await _mediator.Send(new CopyWatermark(WatermarkId, _newWatermarkName));
+            await _mediator.Send(new CopyWatermark(WatermarkId, _newWatermarkName), _cts.Token);
 
         maybeResult.Match(
             watermark => { MudDialog.Close(DialogResult.Ok(watermark)); },

ErsatzTV/Shared/MoveLocalLibraryPathDialog.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Application.Libraries
 @using ErsatzTV.Application.Libraries.Commands
 @using ErsatzTV.Application.Libraries.Queries
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject IMemoryCache _memoryCache
 @inject ISnackbar _snackbar
@@ -38,6 +40,7 @@
 
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -58,6 +61,12 @@
     private record DummyModel;
 
     private readonly DummyModel _dummyModel = new();
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private bool CanSubmit() =>
         _selectedLibrary != null && (_selectedLibrary != _newLibrary || !string.IsNullOrWhiteSpace(_newLibraryName));
@@ -66,7 +75,7 @@
     {
         _newLibrary = new LocalLibraryViewModel(-1, "(New Library)", MediaKind);
         
-        _libraries = await _mediator.Send(new GetAllLocalLibraries())
+        _libraries = await _mediator.Send(new GetAllLocalLibraries(), _cts.Token)
             .Map(list => list.Filter(ll => ll.MediaKind == MediaKind && ll.Id != SourceLibraryId))
             .Map(list => new[] { _newLibrary }.Append(list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase)).ToList());
 
@@ -90,7 +99,7 @@
         if (_selectedLibrary == _newLibrary)
         {
             Either<BaseError, LocalLibraryViewModel> maybeResult =
-                await _mediator.Send(new CreateLocalLibrary(_newLibraryName, MediaKind, new List<string>()));
+                await _mediator.Send(new CreateLocalLibrary(_newLibraryName, MediaKind, new List<string>()), _cts.Token);
 
             maybeResult.Match(
                 collection =>

ErsatzTV/Shared/RemoteMediaSourceLibrariesEditor.razor

@@ -1,5 +1,7 @@
 @using ErsatzTV.Application.MediaSources
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject NavigationManager _navigationManager
 @inject ILogger<RemoteMediaSourceLibrariesEditor> _logger
@@ -43,6 +45,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -64,6 +67,12 @@
 
     private RemoteMediaSourceViewModel _source;
     private List<RemoteMediaSourceLibraryEditViewModel> _libraries;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override Task OnParametersSetAsync() => LoadData();
 
@@ -86,7 +95,7 @@
     private async Task SaveChanges()
     {
         IRequest<Either<BaseError, Unit>> request = GetUpdateLibraryRequest(_libraries);
-        Seq<BaseError> errorMessages = await _mediator.Send(request).Map(e => e.LeftToSeq());
+        Seq<BaseError> errorMessages = await _mediator.Send(request, _cts.Token).Map(e => e.LeftToSeq());
 
         await errorMessages.HeadOrNone().Match(
             error =>

ErsatzTV/Shared/RemoteMediaSourcePathReplacementsEditor.razor

@@ -1,5 +1,7 @@
 @using ErsatzTV.Application.MediaSources
 @using Unit = LanguageExt.Unit
+@using System.Threading
+@implements IDisposable
 @inject NavigationManager _navigationManager
 @inject ILogger<RemoteMediaSourcePathReplacementsEditor> _logger
 @inject ISnackbar _snackbar
@@ -69,6 +71,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public int Id { get; set; }
@@ -89,6 +92,12 @@
     private List<RemoteMediaSourcePathReplacementEditViewModel> _pathReplacements;
 
     private RemoteMediaSourcePathReplacementEditViewModel _selectedItem;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override Task OnParametersSetAsync() => LoadData();
 
@@ -123,7 +132,7 @@
 
     private async Task SaveChanges()
     {
-        Seq<BaseError> errorMessages = await _mediator.Send(GetUpdatePathReplacementsRequest(_pathReplacements))
+        Seq<BaseError> errorMessages = await _mediator.Send(GetUpdatePathReplacementsRequest(_pathReplacements), _cts.Token)
             .Map(e => e.LeftToSeq());
 
         errorMessages.HeadOrNone().Match(

ErsatzTV/Shared/RemoteMediaSources.razor

@@ -2,6 +2,8 @@
 @typeparam TSecrets
 @using Unit = LanguageExt.Unit
 @using ErsatzTV.Core.Interfaces.MediaSources
+@using System.Threading
+@implements IDisposable
 @typeparam TMediaSource
 @inject IMediator _mediator
 @inject IDialogService _dialog
@@ -79,6 +81,7 @@
 </MudContainer>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [Parameter]
     public string Name { get; set; }
@@ -98,6 +101,12 @@
     private List<TViewModel> _mediaSources = new();
 
     private bool _isAuthorized;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override async Task OnParametersSetAsync() => await LoadMediaSources();
 
@@ -105,7 +114,7 @@
     {
         _isAuthorized = await SecretStore.ReadSecrets()
             .Map(secrets => !string.IsNullOrWhiteSpace(secrets.Address) && !string.IsNullOrWhiteSpace(secrets.ApiKey));
-        _mediaSources = await _mediator.Send(GetAllMediaSourcesCommand);
+        _mediaSources = await _mediator.Send(GetAllMediaSourcesCommand, _cts.Token);
     }
 
     private async Task Disconnect()
@@ -118,7 +127,7 @@
         {
             if (_locker.LockRemoteMediaSource<TMediaSource>())
             {
-                await _mediator.Send(DisconnectCommand);
+                await _mediator.Send(DisconnectCommand, _cts.Token);
                 await LoadMediaSources();
             }
         }

ErsatzTV/Shared/SaveAsSmartCollectionDialog.razor

@@ -2,6 +2,8 @@
 @using ErsatzTV.Application.MediaCollections
 @using ErsatzTV.Application.MediaCollections.Commands
 @using ErsatzTV.Application.MediaCollections.Queries
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject IMemoryCache _memoryCache
 @inject ISnackbar _snackbar
@@ -38,6 +40,7 @@
 
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -52,13 +55,19 @@
     private record DummyModel;
 
     private readonly DummyModel _dummyModel = new();
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     private bool CanSubmit() =>
         _selectedCollection != null && (_selectedCollection != _newCollection || !string.IsNullOrWhiteSpace(_newCollectionName));
 
     protected override async Task OnParametersSetAsync()
     {
-        _collections = await _mediator.Send(new GetAllSmartCollections())
+        _collections = await _mediator.Send(new GetAllSmartCollections(), _cts.Token)
             .Map(list => new[] { _newCollection }.Append(list.OrderBy(vm => vm.Name, StringComparer.CurrentCultureIgnoreCase)).ToList());
 
         if (_memoryCache.TryGetValue("SaveAsSmartCollectionDialog.SelectedCollectionId", out int id))
@@ -81,7 +90,7 @@
         if (_selectedCollection == _newCollection)
         {
             Either<BaseError, SmartCollectionViewModel> maybeResult =
-                await _mediator.Send(new CreateSmartCollection(string.Empty, _newCollectionName));
+                await _mediator.Send(new CreateSmartCollection(string.Empty, _newCollectionName), _cts.Token);
 
             maybeResult.Match(
                 collection =>

ErsatzTV/Shared/SchedulePlayoutRebuild.razor

@@ -1,6 +1,8 @@
 @using System.Globalization
 @using ErsatzTV.Application.Playouts
 @using ErsatzTV.Application.Playouts.Commands
+@using System.Threading
+@implements IDisposable
 @inject IMediator _mediator
 @inject ISnackbar _snackbar
 @inject ILogger<SchedulePlayoutRebuild> _logger
@@ -33,6 +35,7 @@
 </MudDialog>
 
 @code {
+    private readonly CancellationTokenSource _cts = new();
 
     [CascadingParameter]
     MudDialogInstance MudDialog { get; set; }
@@ -56,6 +59,12 @@
     private readonly DummyModel _dummyModel = new();
 
     private Option<TimeSpan> _rebuildTime;
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _cts.Dispose();
+    }
 
     protected override void OnParametersSet()
     {
@@ -65,7 +74,7 @@
     private async Task Submit()
     {
         Either<BaseError, PlayoutNameViewModel> maybeResult =
-            await _mediator.Send(new UpdatePlayout(PlayoutId, _rebuildTime));
+            await _mediator.Send(new UpdatePlayout(PlayoutId, _rebuildTime), _cts.Token);
 
         maybeResult.Match(
             playout => { MudDialog.Close(DialogResult.Ok(playout)); },