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using System;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text.Json;
using Jellyfin.Data.Enums;
using Jellyfin.Database.Implementations;
using Jellyfin.Database.Implementations.Entities;
using Jellyfin.Extensions.Json;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
namespace Jellyfin.Server.Migrations.Routines;
/// <summary>
/// Migration to move extracted files to the new directories.
/// </summary>
[JellyfinMigration("2025-04-21T00:00:00", nameof(MigrateKeyframeData))]
public class MigrateKeyframeData : IDatabaseMigrationRoutine
{
private readonly ILogger<MigrateKeyframeData> _logger;
private readonly IApplicationPaths _appPaths;
private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
private static readonly JsonSerializerOptions _jsonOptions = JsonDefaults.Options;
/// <summary>
/// Initializes a new instance of the <see cref="MigrateKeyframeData"/> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="appPaths">Instance of the <see cref="IApplicationPaths"/> interface.</param>
/// <param name="dbProvider">The EFCore db factory.</param>
public MigrateKeyframeData(
ILogger<MigrateKeyframeData> logger,
IApplicationPaths appPaths,
IDbContextFactory<JellyfinDbContext> dbProvider)
{
_logger = logger;
_appPaths = appPaths;
_dbProvider = dbProvider;
}
private string KeyframeCachePath => Path.Combine(_appPaths.DataPath, "keyframes");
/// <inheritdoc />
public void Perform()
{
const int Limit = 5000;
int itemCount = 0, offset = 0;
var sw = Stopwatch.StartNew();
using var context = _dbProvider.CreateDbContext();
var baseQuery = context.BaseItems.Where(b => b.MediaType == MediaType.Video.ToString() && !b.IsVirtualItem && !b.IsFolder).OrderBy(e => e.Id);
var records = baseQuery.Count();
_logger.LogInformation("Checking {Count} items for importable keyframe data.", records);
context.KeyframeData.ExecuteDelete();
using var transaction = context.Database.BeginTransaction();
do
{
var results = baseQuery.Skip(offset).Take(Limit).Select(b => new Tuple<Guid, string?>(b.Id, b.Path)).ToList();
foreach (var result in results)
{
if (TryGetKeyframeData(result.Item1, result.Item2, out var data))
{
itemCount++;
context.KeyframeData.Add(data);
}
}
offset += Limit;
if (offset > records)
{
offset = records;
}
_logger.LogInformation("Checked: {Count} - Imported: {Items} - Time: {Time}", offset, itemCount, sw.Elapsed);
} while (offset < records);
context.SaveChanges();
transaction.Commit();
_logger.LogInformation("Imported keyframes for {Count} items in {Time}", itemCount, sw.Elapsed);
if (Directory.Exists(KeyframeCachePath))
{
Directory.Delete(KeyframeCachePath, true);
}
}
private bool TryGetKeyframeData(Guid id, string? path, [NotNullWhen(true)] out KeyframeData? data)
{
data = null;
if (!string.IsNullOrEmpty(path))
{
var cachePath = GetCachePath(KeyframeCachePath, path);
if (TryReadFromCache(cachePath, out var keyframeData))
{
data = new()
{
ItemId = id,
KeyframeTicks = keyframeData.KeyframeTicks.ToList(),
TotalDuration = keyframeData.TotalDuration
};
return true;
}
}
return false;
}
private string? GetCachePath(string keyframeCachePath, string filePath)
{
DateTime? lastWriteTimeUtc;
try
{
lastWriteTimeUtc = File.GetLastWriteTimeUtc(filePath);
}
catch (IOException e)
{
_logger.LogDebug("Skipping {Path}: {Exception}", filePath, e.Message);
return null;
}
ReadOnlySpan<char> filename = (filePath + "_" + lastWriteTimeUtc.Value.Ticks.ToString(CultureInfo.InvariantCulture)).GetMD5() + ".json";
var prefix = filename[..1];
return Path.Join(keyframeCachePath, prefix, filename);
}
private static bool TryReadFromCache(string? cachePath, [NotNullWhen(true)] out MediaEncoding.Keyframes.KeyframeData? cachedResult)
{
if (File.Exists(cachePath))
{
var bytes = File.ReadAllBytes(cachePath);
cachedResult = JsonSerializer.Deserialize<MediaEncoding.Keyframes.KeyframeData>(bytes, _jsonOptions);
return cachedResult is not null;
}
cachedResult = null;
return false;
}
}
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