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using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Logging;
using System;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Persistence
{
public class SqliteProviderInfoRepository : BaseSqliteRepository, IProviderRepository
{
private IDbConnection _connection;
private IDbCommand _saveStatusCommand;
private readonly IApplicationPaths _appPaths;
public SqliteProviderInfoRepository(ILogManager logManager, IApplicationPaths appPaths) : base(logManager)
{
_appPaths = appPaths;
}
/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return "SQLite";
}
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(_appPaths.DataPath, "refreshinfo.db");
_connection = await SqliteExtensions.ConnectToDb(dbFile, Logger).ConfigureAwait(false);
string[] queries = {
"create table if not exists MetadataStatus (ItemId GUID PRIMARY KEY, DateLastMetadataRefresh datetime, DateLastImagesRefresh datetime, ItemDateModified DateTimeNull)",
"create index if not exists idx_MetadataStatus on MetadataStatus(ItemId)",
//pragmas
"pragma temp_store = memory",
"pragma shrink_memory"
};
_connection.RunQueries(queries, Logger);
AddItemDateModifiedCommand();
PrepareStatements();
}
private static readonly string[] StatusColumns =
{
"ItemId",
"DateLastMetadataRefresh",
"DateLastImagesRefresh",
"ItemDateModified"
};
private void AddItemDateModifiedCommand()
{
using (var cmd = _connection.CreateCommand())
{
cmd.CommandText = "PRAGMA table_info(MetadataStatus)";
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
{
while (reader.Read())
{
if (!reader.IsDBNull(1))
{
var name = reader.GetString(1);
if (string.Equals(name, "ItemDateModified", StringComparison.OrdinalIgnoreCase))
{
return;
}
}
}
}
}
var builder = new StringBuilder();
builder.AppendLine("alter table MetadataStatus");
builder.AppendLine("add column ItemDateModified DateTime NULL");
_connection.RunQueries(new[] { builder.ToString() }, Logger);
}
/// <summary>
/// Prepares the statements.
/// </summary>
private void PrepareStatements()
{
_saveStatusCommand = _connection.CreateCommand();
_saveStatusCommand.CommandText = string.Format("replace into MetadataStatus ({0}) values ({1})",
string.Join(",", StatusColumns),
string.Join(",", StatusColumns.Select(i => "@" + i).ToArray()));
foreach (var col in StatusColumns)
{
_saveStatusCommand.Parameters.Add(_saveStatusCommand, "@" + col);
}
}
public MetadataStatus GetMetadataStatus(Guid itemId)
{
if (itemId == Guid.Empty)
{
throw new ArgumentNullException("itemId");
}
using (var cmd = _connection.CreateCommand())
{
var cmdText = "select " + string.Join(",", StatusColumns) + " from MetadataStatus where";
cmdText += " ItemId=@ItemId";
cmd.Parameters.Add(cmd, "@ItemId", DbType.Guid).Value = itemId;
cmd.CommandText = cmdText;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
{
while (reader.Read())
{
return GetStatus(reader);
}
return null;
}
}
}
private MetadataStatus GetStatus(IDataReader reader)
{
var result = new MetadataStatus
{
ItemId = reader.GetGuid(0)
};
if (!reader.IsDBNull(1))
{
result.DateLastMetadataRefresh = reader.GetDateTime(1).ToUniversalTime();
}
if (!reader.IsDBNull(2))
{
result.DateLastImagesRefresh = reader.GetDateTime(2).ToUniversalTime();
}
if (!reader.IsDBNull(3))
{
result.ItemDateModified = reader.GetDateTime(3).ToUniversalTime();
}
return result;
}
public async Task SaveMetadataStatus(MetadataStatus status, CancellationToken cancellationToken)
{
if (status == null)
{
throw new ArgumentNullException("status");
}
cancellationToken.ThrowIfCancellationRequested();
await WriteLock.WaitAsync(cancellationToken).ConfigureAwait(false);
IDbTransaction transaction = null;
try
{
transaction = _connection.BeginTransaction();
_saveStatusCommand.GetParameter(0).Value = status.ItemId;
_saveStatusCommand.GetParameter(1).Value = status.DateLastMetadataRefresh;
_saveStatusCommand.GetParameter(2).Value = status.DateLastImagesRefresh;
_saveStatusCommand.GetParameter(3).Value = status.ItemDateModified;
_saveStatusCommand.Transaction = transaction;
_saveStatusCommand.ExecuteNonQuery();
transaction.Commit();
}
catch (OperationCanceledException)
{
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
catch (Exception e)
{
Logger.ErrorException("Failed to save provider info:", e);
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
WriteLock.Release();
}
}
protected override void CloseConnection()
{
if (_connection != null)
{
if (_connection.IsOpen())
{
_connection.Close();
}
_connection.Dispose();
_connection = null;
}
}
}
}
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