103 lines
2.4 KiB
C#
103 lines
2.4 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Model.Logging;
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using System;
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using System.IO;
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using System.Text;
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namespace MediaBrowser.Common.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 _logger;
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private readonly object _syncLock = new object();
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private string CachePath
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{
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get { return Path.Combine(_appPaths.DataPath, "device.txt"); }
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}
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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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Guid guid;
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if (Guid.TryParse(value, out guid))
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{
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return value;
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}
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_logger.Error("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.ErrorException("Error reading file", ex);
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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));
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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.ErrorException("Error writing to file", ex);
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}
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}
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private string GetNewId()
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{
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return Guid.NewGuid().ToString("N");
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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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private string _id;
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public DeviceId(IApplicationPaths appPaths, ILogger 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
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{
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get { return _id ?? (_id = GetDeviceId()); }
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}
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}
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}
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