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using System;
using System.Collections.Generic;
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 MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
namespace Jellyfin.Server.Migrations.Routines;
/// <summary>
/// Migration to move extracted files to the new directories.
/// </summary>
public class MigrateKeyframeData : IDatabaseMigrationRoutine
{
private readonly ILibraryManager _libraryManager;
private readonly ILogger<MoveTrickplayFiles> _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="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
/// <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(
ILibraryManager libraryManager,
ILogger<MoveTrickplayFiles> logger,
IApplicationPaths appPaths,
IDbContextFactory<JellyfinDbContext> dbProvider)
{
_libraryManager = libraryManager;
_logger = logger;
_appPaths = appPaths;
_dbProvider = dbProvider;
}
private string KeyframeCachePath => Path.Combine(_appPaths.DataPath, "keyframes");
/// <inheritdoc />
public Guid Id => new("EA4bCAE1-09A4-428E-9B90-4B4FD2EA1B24");
/// <inheritdoc />
public string Name => "MigrateKeyframeData";
/// <inheritdoc />
public bool PerformOnNewInstall => false;
/// <inheritdoc />
public void Perform()
{
const int Limit = 100;
int itemCount = 0, offset = 0, previousCount;
var sw = Stopwatch.StartNew();
var itemsQuery = new InternalItemsQuery
{
MediaTypes = [MediaType.Video],
SourceTypes = [SourceType.Library],
IsVirtualItem = false,
IsFolder = false
};
using var context = _dbProvider.CreateDbContext();
context.KeyframeData.ExecuteDelete();
using var transaction = context.Database.BeginTransaction();
List<KeyframeData> keyframes = [];
do
{
var result = _libraryManager.GetItemsResult(itemsQuery);
_logger.LogInformation("Importing keyframes for {Count} items", result.TotalRecordCount);
var items = result.Items;
previousCount = items.Count;
offset += Limit;
foreach (var item in items)
{
if (TryGetKeyframeData(item, out var data))
{
keyframes.Add(data);
}
if (++itemCount % 10_000 == 0)
{
context.KeyframeData.AddRange(keyframes);
keyframes.Clear();
_logger.LogInformation("Imported keyframes for {Count} items in {Time}", itemCount, sw.Elapsed);
}
}
} while (previousCount == Limit);
context.KeyframeData.AddRange(keyframes);
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(BaseItem item, [NotNullWhen(true)] out KeyframeData? data)
{
data = null;
var path = item.Path;
if (!string.IsNullOrEmpty(path))
{
var cachePath = GetCachePath(KeyframeCachePath, path);
if (TryReadFromCache(cachePath, out var keyframeData))
{
data = new()
{
ItemId = item.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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