search overhaul (#87)

* add letter bar with no links

* use lucene for search, add paged search results

* add search index version

* index library_name; rebuild index when folder is missing

* maintain index as local movies change

* fix tests

* maintain index as local shows change

* maintain index as plex movies change

* maintain index as plex shows change

* code cleanup

* add duplicate filter to search

* add links to letter bar

* code cleanup

ErsatzTV/Services/SchedulerService.cs

@@ -8,6 +8,7 @@ using ErsatzTV.Application;
 using ErsatzTV.Application.MediaSources.Commands;
 using ErsatzTV.Application.Playouts.Commands;
 using ErsatzTV.Application.Plex.Commands;
+using ErsatzTV.Application.Search.Commands;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Interfaces.Locking;
 using ErsatzTV.Infrastructure.Data;
@@ -54,6 +55,7 @@ namespace ErsatzTV.Services
 
         private async Task DoWork(CancellationToken cancellationToken)
         {
+            await RebuildSearchIndex(cancellationToken);
             await BuildPlayouts(cancellationToken);
             await ScanLocalMediaSources(cancellationToken);
             await ScanPlexMediaSources(cancellationToken);
@@ -111,5 +113,8 @@ namespace ErsatzTV.Services
                 }
             }
         }
+
+        private async Task RebuildSearchIndex(CancellationToken cancellationToken) =>
+            await _channel.WriteAsync(new RebuildSearchIndex(), cancellationToken);
     }
 }

ErsatzTV/Services/WorkerService.cs

@@ -6,6 +6,7 @@ using ErsatzTV.Application;
 using ErsatzTV.Application.MediaSources.Commands;
 using ErsatzTV.Application.Playouts.Commands;
 using ErsatzTV.Application.Plex.Commands;
+using ErsatzTV.Application.Search.Commands;
 using ErsatzTV.Core;
 using LanguageExt;
 using MediatR;
@@ -82,6 +83,9 @@ namespace ErsatzTV.Services
                                     synchronizePlexLibraryById.PlexLibraryId,
                                     error.Value));
                             break;
+                        case RebuildSearchIndex rebuildSearchIndex:
+                            await mediator.Send(rebuildSearchIndex, cancellationToken);
+                            break;
                     }
                 }
                 catch (Exception ex)