Implement BumperEndpoints and remove deprecated bumper-related functionality

Added new BumperEndpoints to the API for managing bumper templates and variants, enhancing the channel management capabilities. Removed outdated bumper-related commands and handlers from the application, streamlining the codebase and improving maintainability. Updated ChannelEndpoints to reflect these changes and ensure proper routing for the new endpoints.

backend/tests/TeleWave.Application.Tests/Broadcast/BumperPreviewTests.cs

@@ -1,6 +1,5 @@
 using Microsoft.Extensions.Options;
 using NSubstitute;
-using TeleWave.Application.Broadcast;
 using TeleWave.Application.Broadcast.Bumpers;
 using TeleWave.Application.Common.Interfaces;
 using TeleWave.Application.Streaming;
@@ -16,8 +15,8 @@ namespace TeleWave.Application.Tests.Broadcast;
 
 /// <summary>
 /// Превью ТВ-заставки: рендерится каждый подблок блока, длительность выравнивается по длине
-/// сегмента HLS, а названия «из/в» берутся из групп этого канала — иначе превью показывало бы
-/// случайные шоу из библиотеки.
+/// сегмента HLS, а плейсхолдеры подставляются образцами выбранного канала — блок общий, но
+/// смотреть на него надо глазами конкретного канала.
 /// </summary>
 public class BumperPreviewTests
 {
@@ -38,49 +37,49 @@ public class BumperPreviewTests
             Options.Create(new StreamingOptions { SegmentSeconds = 5 })
         );
 
+    private static BumperTemplate NewTemplate()
+    {
+        var template = BumperTemplate.Create("Блок", "Текст 1");
+        template
+            .Variants[0]
+            .SetLines([
+                BumperLine.Create(0, BumperLineStyle.Label, BumperLineColor.Accent, "СЕЙЧАС"),
+                BumperLine.Create(1, BumperLineStyle.Title, BumperLineColor.Text, "{now.title}"),
+                BumperLine.Create(2, BumperLineStyle.Label, BumperLineColor.Accent, "ДАЛЕЕ"),
+                BumperLine.Create(3, BumperLineStyle.Title, BumperLineColor.Text, "{next.title}"),
+            ]);
+        return template;
+    }
+
+    private static IReadOnlyList<BumperRenderSpec> Specs(IBumperRenderer renderer) =>
+        renderer
+            .ReceivedCalls()
+            .Select(c => c.GetArguments()[1])
+            .OfType<BumperRenderSpec>()
+            .ToList();
+
     [Fact]
-    public async Task Render_UnknownChannel_ReturnsNotFound()
+    public async Task Render_UnknownTemplate_ReturnsNotFound()
     {
         var fixture = new TestDb();
         await using var db = fixture.New();
 
         var result = await Handler(db)
-            .Handle(
-                new RenderBumperPreviewCommand(Guid.NewGuid(), Guid.NewGuid()),
-                CancellationToken.None
-            );
+            .Handle(new RenderBumperPreviewCommand(Guid.NewGuid(), null), CancellationToken.None);
 
-        Assert.Equal(ChannelErrors.NotFound, result.Error);
+        Assert.Equal(BumperErrors.TemplateNotFound, result.Error);
     }
 
     [Fact]
-    public async Task Render_UnknownTemplate_ReturnsBumperTemplateNotFound()
+    public async Task Render_DrawsEveryVariant_WithChannelSamplesAndAlignedDuration()
     {
         var fixture = new TestDb();
         var channel = Channel.Create("Первый", "one", T0);
-        await using (var seed = fixture.New())
-        {
-            seed.Channels.Add(channel);
-            await seed.SaveChangesAsync(CancellationToken.None);
-        }
-
-        await using var db = fixture.New();
-        var result = await Handler(db)
-            .Handle(
-                new RenderBumperPreviewCommand(channel.Id, Guid.NewGuid()),
-                CancellationToken.None
-            );
-
-        Assert.Equal(ChannelErrors.BumperTemplateNotFound, result.Error);
-    }
-
-    [Fact]
-    public async Task Render_DrawsEveryVariant_WithChannelShowNamesAndAlignedDuration()
-    {
-        var fixture = new TestDb();
-        var channel = Channel.Create("Первый", "one", T0);
-        var template = channel.BumperTemplates[0];
+        var template = NewTemplate();
         var second = template.AddVariant("Второй подблок");
+        second.SetLines([
+            BumperLine.Create(0, BumperLineStyle.Title, BumperLineColor.Text, "{channel}"),
+        ]);
 
         // Шоу канала: слот сетки ссылается на группу, в группе — шоу.
         var show = Show.Create("Наше шоу", ShowKind.Series);
@@ -105,6 +104,7 @@ public class BumperPreviewTests
         await using (var seed = fixture.New())
         {
             seed.Channels.Add(channel);
+            seed.BumperTemplates.Add(template);
             seed.Shows.Add(show);
             seed.Groups.Add(group);
             seed.ScheduleTemplates.Add(grid);
@@ -115,7 +115,7 @@ public class BumperPreviewTests
         await using var db = fixture.New();
         var result = await Handler(db, renderer)
             .Handle(
-                new RenderBumperPreviewCommand(channel.Id, template.Id),
+                new RenderBumperPreviewCommand(template.Id, channel.Id),
                 CancellationToken.None
             );
 
@@ -136,32 +136,28 @@ public class BumperPreviewTests
                 Arg.Any<CancellationToken>()
             );
 
-        var specs = renderer
-            .ReceivedCalls()
-            .Select(c => c.GetArguments()[1])
-            .OfType<BumperRenderSpec>()
-            .ToList();
+        var specs = Specs(renderer);
         // Своего звука у блока нет: 8 секунд по умолчанию, выровненные вверх до сегмента в 5 сек.
         Assert.All(specs, s => Assert.Equal(10, s.DurationSeconds));
-        Assert.All(specs, s => Assert.Equal("Наше шоу", s.NowTitle));
-        // Второго шоу у канала нет — подставляется заглушка.
-        Assert.All(specs, s => Assert.Equal("Второе шоу", s.NextTitle));
-        Assert.All(specs, s => Assert.Null(s.BackgroundFile));
-        Assert.All(specs, s => Assert.Null(s.PosterFile));
+
+        var nowNext = specs.First(s => s.Lines.Count == 4);
+        Assert.Equal("Наше шоу", nowNext.Lines[1].Text);
+
+        var channelLine = specs.First(s => s.Lines.Count == 1);
+        Assert.Equal("Первый", channelLine.Lines[0].Text);
     }
 
     [Fact]
     public async Task Render_WithBackgroundImage_ResolvesPathFromRegistry()
     {
         var fixture = new TestDb();
-        var channel = Channel.Create("Первый", "one", T0);
-        var template = channel.BumperTemplates[0];
+        var template = NewTemplate();
         var image = Image.Create(ImageCategory.BumperBackground, ".png", "bg.png");
         template.SetBackgroundImage(image.Id);
 
         await using (var seed = fixture.New())
         {
-            seed.Channels.Add(channel);
+            seed.BumperTemplates.Add(template);
             seed.Images.Add(image);
             await seed.SaveChangesAsync(CancellationToken.None);
         }
@@ -172,19 +168,40 @@ public class BumperPreviewTests
 
         await using var db = fixture.New();
         var result = await Handler(db, renderer, imageStore: imageStore)
-            .Handle(
-                new RenderBumperPreviewCommand(channel.Id, template.Id),
-                CancellationToken.None
-            );
+            .Handle(new RenderBumperPreviewCommand(template.Id, null), CancellationToken.None);
 
         Assert.True(result.IsSuccess);
-        var spec = renderer
-            .ReceivedCalls()
-            .Select(c => c.GetArguments()[1])
-            .OfType<BumperRenderSpec>()
-            .First();
+        var spec = Specs(renderer).First();
         Assert.Equal("/data/images/bg.png", spec.BackgroundFile);
-        // Шоу у канала нет — обе подписи заглушечные.
-        Assert.Equal("Первое шоу", spec.NowTitle);
+        // Канала нет — образцы заглушечные, но кадр всё равно собирается.
+        Assert.Equal("Первое шоу", spec.Lines[1].Text);
+    }
+
+    [Fact]
+    public async Task Render_DropsLinesThatResolveToNothing()
+    {
+        var fixture = new TestDb();
+        var template = BumperTemplate.Create("Блок", "Текст 1");
+        template
+            .Variants[0]
+            .SetLines([
+                BumperLine.Create(0, BumperLineStyle.Label, BumperLineColor.Accent, "{next.genre}"),
+                BumperLine.Create(1, BumperLineStyle.Title, BumperLineColor.Text, "{next.title}"),
+            ]);
+
+        await using (var seed = fixture.New())
+        {
+            seed.BumperTemplates.Add(template);
+            await seed.SaveChangesAsync(CancellationToken.None);
+        }
+
+        var renderer = Substitute.For<IBumperRenderer>();
+        await using var db = fixture.New();
+        await Handler(db, renderer)
+            .Handle(new RenderBumperPreviewCommand(template.Id, null), CancellationToken.None);
+
+        // Жанра у образца нет — строка схлопнулась, а не оставила дыру в кадре.
+        var spec = Specs(renderer).First();
+        Assert.Single(spec.Lines);
     }
 }