add ability to deep scan just a single tv show for Plex, Emby, and Jellyfin (#2318)

* add ability to deep scan just a single tv show for Plex, Emby, and Jellyfin

Including "/api/libraries/{id:int}/scan-show" REST API endpoint to
trigger.

* restrict plex search results to the intended library

* restrict scanning to media server libraries that are marked to sync with etv

* fix previous commit

* also guard library scan api

* add scan buttons to show ui

* scan single plex show by id

* scan jellyfin and emby single shows by id

* update changelog

---------

Co-authored-by: Jeff Slutter <MrMustard@gmail.com>
Co-authored-by: Jason Dove <1695733+jasongdove@users.noreply.github.com>

ErsatzTV/Controllers/Api/LibrariesController.cs

@@ -1,15 +1,40 @@
 using ErsatzTV.Application.Libraries;
+using ErsatzTV.Core.Interfaces.Repositories;
 using MediatR;
 using Microsoft.AspNetCore.Mvc;
 
 namespace ErsatzTV.Controllers.Api;
 
 [ApiController]
-public class LibrariesController(IMediator mediator)
+public class LibrariesController(ITelevisionRepository televisionRepository, IMediator mediator)
 {
     [HttpPost("/api/libraries/{id:int}/scan")]
     public async Task<IActionResult> ResetPlayout(int id) =>
         await mediator.Send(new QueueLibraryScanByLibraryId(id))
             ? new OkResult()
             : new NotFoundResult();
+
+    [HttpPost("/api/libraries/{id:int}/scan-show")]
+    public async Task<IActionResult> ScanShow(int id, [FromBody] ScanShowRequest request)
+    {
+        if (string.IsNullOrWhiteSpace(request.ShowTitle))
+        {
+            return new BadRequestObjectResult(new { error = "ShowTitle is required" });
+        }
+
+        var trimmedTitle = request.ShowTitle.Trim();
+        var maybeShowId = await televisionRepository.GetShowIdByTitle(id, trimmedTitle);
+        foreach (var showId in maybeShowId)
+        {
+            bool result = await mediator.Send(new QueueShowScanByLibraryId(id, showId, trimmedTitle, request.DeepScan));
+
+            return result
+                ? new OkResult()
+                : new BadRequestObjectResult(new { error = "Unable to queue show scan. Library may not exist, may not support single show scanning, or may already be scanning." });
+        }
+
+        return new BadRequestObjectResult(new { error = $"Unable to locate show with title {request.ShowTitle} in library {id}" });
+    }
 }
+
+public record ScanShowRequest(string ShowTitle, bool DeepScan = false);