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using Gestor.Common.Helpers;
using NHibernate.Cfg;
using System;
using System.ComponentModel;
using System.Data.SqlClient;
using System.IO;
using System.Reflection;
using System.Runtime.Serialization.Formatters.Binary;
namespace Gestor.Infrastructure.Configuration
{
public class ConfigurationFileCache
{
private readonly string _cacheFile;
private readonly Assembly _definitionsAssembly;
private bool IsConfigurationFileValid
{
get
{
string location;
if (!File.Exists(this._cacheFile))
{
return false;
}
FileInfo fileInfo = new FileInfo(this._cacheFile);
Assembly assembly = this._definitionsAssembly;
if (assembly != null)
{
location = assembly.Location;
}
else
{
location = null;
}
string str = location;
if (str == null)
{
return false;
}
FileInfo fileInfo1 = new FileInfo(str);
if (fileInfo.Length < (long)5120)
{
return false;
}
return fileInfo.LastWriteTime >= fileInfo1.LastWriteTime;
}
}
public ConfigurationFileCache(string connectionString)
{
if (connectionString == null)
{
return;
}
this._definitionsAssembly = Assembly.GetExecutingAssembly();
SqlConnection sqlConnection = new SqlConnection(connectionString);
string str = string.Concat("Data_", sqlConnection.Database, ".cfg");
sqlConnection.Dispose();
this._cacheFile = string.Concat(AppDomain.CurrentDomain.BaseDirectory, str);
}
public void DeleteCacheFile()
{
try
{
if (File.Exists(this._cacheFile))
{
File.Delete(this._cacheFile);
}
}
catch (Exception exception)
{
}
}
public NHibernate.Cfg.Configuration LoadConfigurationFromFile()
{
NHibernate.Cfg.Configuration configuration;
if (!this.IsConfigurationFileValid)
{
return null;
}
try
{
using (FileStream fileStream = File.Open(this._cacheFile, FileMode.Open, FileAccess.Read))
{
using (MemoryStream memoryStream = new MemoryStream(ConfigurationFileCache.ReadFully(fileStream).DecryptBytes()))
{
configuration = (new BinaryFormatter()).Deserialize(memoryStream) as NHibernate.Cfg.Configuration;
}
}
}
catch (Exception exception)
{
this.DeleteCacheFile();
configuration = null;
}
return configuration;
}
private static byte[] ReadFully(Stream inputStream)
{
byte[] array;
using (MemoryStream memoryStream = new MemoryStream())
{
inputStream.CopyTo(memoryStream);
array = memoryStream.ToArray();
}
return array;
}
public void SaveConfigurationToFile(NHibernate.Cfg.Configuration configuration)
{
try
{
using (FileStream fileStream = File.Open(this._cacheFile, FileMode.Create, FileAccess.Write, FileShare.ReadWrite))
{
using (MemoryStream memoryStream = new MemoryStream())
{
(new BinaryFormatter()).Serialize(memoryStream, configuration);
byte[] numArray = memoryStream.ToArray().EncryptBytes();
fileStream.Write(numArray, 0, (int)numArray.Length);
}
}
}
catch (Exception exception)
{
}
}
}
}
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