98 lines
2.4 KiB
C#
98 lines
2.4 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Globalization;
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using System.IO;
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using System.Text;
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using MediaBrowser.Common.Configuration;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.Devices
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{
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public class DeviceId
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{
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private readonly IApplicationPaths _appPaths;
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private readonly ILogger<DeviceId> _logger;
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private readonly object _syncLock = new object();
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private string? _id;
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public DeviceId(IApplicationPaths appPaths, ILogger<DeviceId> logger)
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{
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_appPaths = appPaths;
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_logger = logger;
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}
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public string Value => _id ??= GetDeviceId();
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private string CachePath => Path.Combine(_appPaths.DataPath, "device.txt");
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private string? GetCachedId()
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{
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try
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{
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lock (_syncLock)
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{
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var value = File.ReadAllText(CachePath, Encoding.UTF8);
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if (Guid.TryParse(value, out _))
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{
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return value;
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}
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_logger.LogError("Invalid value found in device id file");
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}
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}
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catch (DirectoryNotFoundException)
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{
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}
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catch (FileNotFoundException)
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{
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error reading file");
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}
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return null;
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}
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private void SaveId(string id)
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{
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try
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{
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var path = CachePath;
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Directory.CreateDirectory(Path.GetDirectoryName(path) ?? throw new InvalidOperationException("Path can't be a root directory."));
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lock (_syncLock)
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{
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File.WriteAllText(path, id, Encoding.UTF8);
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error writing to file");
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}
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}
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private static string GetNewId()
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{
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return Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
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}
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private string GetDeviceId()
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{
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var id = GetCachedId();
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if (string.IsNullOrWhiteSpace(id))
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{
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id = GetNewId();
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SaveId(id);
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}
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return id;
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}
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}
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}
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