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using MediaBrowser.Model.Serialization;
using System;
using System.IO;
using System.Linq;
namespace MediaBrowser.Common.Configuration
{
/// <summary>
/// Class ConfigurationHelper
/// </summary>
public static class ConfigurationHelper
{
/// <summary>
/// Reads an xml configuration file from the file system
/// It will immediately re-serialize and save if new serialization data is available due to property changes
/// </summary>
/// <param name="type">The type.</param>
/// <param name="path">The path.</param>
/// <param name="xmlSerializer">The XML serializer.</param>
/// <returns>System.Object.</returns>
public static object GetXmlConfiguration(Type type, string path, IXmlSerializer xmlSerializer)
{
object configuration;
byte[] buffer = null;
// Use try/catch to avoid the extra file system lookup using File.Exists
try
{
buffer = File.ReadAllBytes(path);
configuration = xmlSerializer.DeserializeFromBytes(type, buffer);
}
catch (Exception)
{
configuration = Activator.CreateInstance(type);
}
using (var stream = new MemoryStream())
{
xmlSerializer.SerializeToStream(configuration, stream);
// Take the object we just got and serialize it back to bytes
var newBytes = stream.ToArray();
// If the file didn't exist before, or if something has changed, re-save
if (buffer == null || !buffer.SequenceEqual(newBytes))
{
Directory.CreateDirectory(Path.GetDirectoryName(path));
// Save it after load in case we got new items
File.WriteAllBytes(path, newBytes);
}
return configuration;
}
}
}
}
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