Add interstitial endpoints and enhance media and template functionalities: implement MapInterstitialEndpoints in Program.cs, add preview functionality for media assets in MediaEndpoints, and introduce template preview capabilities in TemplateEndpoints. Remove obsolete bumper settings from Channel and related classes to streamline configuration.

backend/src/TeleWave.Api/Endpoints/MediaEndpoints.cs

@@ -1,3 +1,5 @@
+using System.Text;
+using System.Text.RegularExpressions;
 using LiteCqrs;
 using Microsoft.Extensions.Options;
 using TeleWave.Api.Common;
@@ -16,6 +18,8 @@ namespace TeleWave.Api.Endpoints;
 
 public static class MediaEndpoints
 {
+    private static readonly Regex SegmentFileName = new(@"^seg\d{1,6}\.ts$", RegexOptions.Compiled);
+
     public static IEndpointRouteBuilder MapMediaEndpoints(this IEndpointRouteBuilder app)
     {
         var admin = app.MapGroup("/api/admin/media")
@@ -27,6 +31,11 @@ public static class MediaEndpoints
         admin.MapGet("/stats", Stats).Produces<MediaStatsDto>();
         admin.MapDelete("/{id:guid}", Delete).Produces(StatusCodes.Status204NoContent);
 
+        // Просмотр обработанного ассета в админке (ролики, проверка серии). Публичная раздача идёт
+        // по stream-куке, здесь роут под JWT — плейлист и сегменты грузит hls.js с Bearer.
+        admin.MapGet("/{id:guid}/preview/index.m3u8", PreviewPlaylist);
+        admin.MapGet("/{id:guid}/preview/{file}", PreviewSegment);
+
         return app;
     }
 
@@ -135,6 +144,56 @@ public static class MediaEndpoints
         var result = await sender.Send(new DeleteMediaAssetCommand(id), cancellationToken);
         return result.ToHttpResult();
     }
+
+    /// <summary>Плейлист ассета: переписываем ffmpeg-index.m3u8, направляя сегменты на admin-роут.</summary>
+    private static IResult PreviewPlaylist(Guid id, MediaPathResolver paths)
+    {
+        string indexPath;
+        try
+        {
+            indexPath = paths.SegmentPath(id, "index.m3u8");
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return Results.NotFound();
+        }
+        if (!File.Exists(indexPath))
+            return Results.NotFound();
+
+        var baseUrl = $"/api/admin/media/{id}/preview/";
+        var sb = new StringBuilder();
+        foreach (var line in File.ReadLines(indexPath))
+        {
+            var trimmed = line.Trim();
+            if (trimmed.Length == 0)
+                continue;
+            // Директивы — как есть; строки-сегменты (абсолютный путь от ffmpeg) → admin-URL.
+            sb.Append(trimmed.StartsWith('#') ? trimmed : baseUrl + Path.GetFileName(trimmed))
+                .Append('\n');
+        }
+
+        return Results.Text(sb.ToString(), "application/vnd.apple.mpegurl");
+    }
+
+    private static IResult PreviewSegment(Guid id, string file, MediaPathResolver paths)
+    {
+        if (!SegmentFileName.IsMatch(file))
+            return Results.NotFound();
+
+        string path;
+        try
+        {
+            path = paths.SegmentPath(id, file);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return Results.NotFound();
+        }
+        if (!File.Exists(path))
+            return Results.NotFound();
+
+        return Results.File(path, "video/mp2t", enableRangeProcessing: true);
+    }
 }
 
 public sealed record UploadMediaResponse(Guid Id);