Import Keyframes into database (#13771)

* Migrate keyframe data into database

* Clear database table before import to handle failed migrations

Jellyfin.Server.Implementations/Item/KeyframeRepository.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Database.Implementations;
+using Jellyfin.Database.Implementations.Entities;
+using MediaBrowser.Controller.Persistence;
+using Microsoft.EntityFrameworkCore;
+
+namespace Jellyfin.Server.Implementations.Item;
+
+/// <summary>
+/// Repository for obtaining Keyframe data.
+/// </summary>
+public class KeyframeRepository : IKeyframeRepository
+{
+    private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="KeyframeRepository"/> class.
+    /// </summary>
+    /// <param name="dbProvider">The EFCore db factory.</param>
+    public KeyframeRepository(IDbContextFactory<JellyfinDbContext> dbProvider)
+    {
+        _dbProvider = dbProvider;
+    }
+
+    private static MediaEncoding.Keyframes.KeyframeData Map(KeyframeData entity)
+    {
+        return new MediaEncoding.Keyframes.KeyframeData(
+            entity.TotalDuration,
+            (entity.KeyframeTicks ?? []).ToList());
+    }
+
+    private KeyframeData Map(MediaEncoding.Keyframes.KeyframeData dto, Guid itemId)
+    {
+        return new()
+        {
+            ItemId = itemId,
+            TotalDuration = dto.TotalDuration,
+            KeyframeTicks = dto.KeyframeTicks.ToList()
+        };
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<MediaEncoding.Keyframes.KeyframeData> GetKeyframeData(Guid itemId)
+    {
+        using var context = _dbProvider.CreateDbContext();
+
+        return context.KeyframeData.AsNoTracking().Where(e => e.ItemId.Equals(itemId)).Select(e => Map(e)).ToList();
+    }
+
+    /// <inheritdoc />
+    public async Task SaveKeyframeDataAsync(Guid itemId, MediaEncoding.Keyframes.KeyframeData data, CancellationToken cancellationToken)
+    {
+        using var context = _dbProvider.CreateDbContext();
+        using var transaction = await context.Database.BeginTransactionAsync(cancellationToken).ConfigureAwait(false);
+        await context.KeyframeData.Where(e => e.ItemId.Equals(itemId)).ExecuteDeleteAsync(cancellationToken).ConfigureAwait(false);
+        await context.KeyframeData.AddAsync(Map(data, itemId), cancellationToken).ConfigureAwait(false);
+        await context.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
+        await transaction.CommitAsync(cancellationToken).ConfigureAwait(false);
+    }
+}