update server core project

Emby.Server.Core/Data/DataExtensions.cs

@@ -0,0 +1,181 @@
+using System;
+using System.Data;
+using System.IO;
+using System.Text;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Serialization;
+
+namespace Emby.Server.Core.Data
+{
+    public static class DataExtensions
+    {
+        /// <summary>
+        /// Determines whether the specified conn is open.
+        /// </summary>
+        /// <param name="conn">The conn.</param>
+        /// <returns><c>true</c> if the specified conn is open; otherwise, <c>false</c>.</returns>
+        public static bool IsOpen(this IDbConnection conn)
+        {
+            return conn.State == ConnectionState.Open;
+        }
+
+        public static IDataParameter GetParameter(this IDbCommand cmd, int index)
+        {
+            return (IDataParameter)cmd.Parameters[index];
+        }
+
+        public static IDataParameter Add(this IDataParameterCollection paramCollection, IDbCommand cmd, string name, DbType type)
+        {
+            var param = cmd.CreateParameter();
+
+            param.ParameterName = name;
+            param.DbType = type;
+
+            paramCollection.Add(param);
+
+            return param;
+        }
+
+        public static IDataParameter Add(this IDataParameterCollection paramCollection, IDbCommand cmd, string name)
+        {
+            var param = cmd.CreateParameter();
+
+            param.ParameterName = name;
+
+            paramCollection.Add(param);
+
+            return param;
+        }
+
+
+        /// <summary>
+        /// Gets a stream from a DataReader at a given ordinal
+        /// </summary>
+        /// <returns>Stream.</returns>
+        /// <exception cref="System.ArgumentNullException">reader</exception>
+        public static Stream GetMemoryStream(this IDataReader reader, int ordinal, IMemoryStreamFactory streamProvider)
+        {
+            if (reader == null)
+            {
+                throw new ArgumentNullException("reader");
+            }
+
+            var memoryStream = streamProvider.CreateNew();
+            var num = 0L;
+            var array = new byte[4096];
+            long bytes;
+            do
+            {
+                bytes = reader.GetBytes(ordinal, num, array, 0, array.Length);
+                memoryStream.Write(array, 0, (int)bytes);
+                num += bytes;
+            }
+            while (bytes > 0L);
+            memoryStream.Position = 0;
+            return memoryStream;
+        }
+
+        /// <summary>
+        /// Runs the queries.
+        /// </summary>
+        /// <param name="connection">The connection.</param>
+        /// <param name="queries">The queries.</param>
+        /// <param name="logger">The logger.</param>
+        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
+        /// <exception cref="System.ArgumentNullException">queries</exception>
+        public static void RunQueries(this IDbConnection connection, string[] queries, ILogger logger)
+        {
+            if (queries == null)
+            {
+                throw new ArgumentNullException("queries");
+            }
+
+            using (var tran = connection.BeginTransaction())
+            {
+                try
+                {
+                    using (var cmd = connection.CreateCommand())
+                    {
+                        foreach (var query in queries)
+                        {
+                            cmd.Transaction = tran;
+                            cmd.CommandText = query;
+                            cmd.ExecuteNonQuery();
+                        }
+                    }
+
+                    tran.Commit();
+                }
+                catch (Exception e)
+                {
+                    logger.ErrorException("Error running queries", e);
+                    tran.Rollback();
+                    throw;
+                }
+            }
+        }
+
+        public static void Attach(IDbConnection db, string path, string alias)
+        {
+            using (var cmd = db.CreateCommand())
+            {
+                cmd.CommandText = string.Format("attach @dbPath as {0};", alias);
+                cmd.Parameters.Add(cmd, "@dbPath", DbType.String);
+                cmd.GetParameter(0).Value = path;
+
+                cmd.ExecuteNonQuery();
+            }
+        }
+
+        /// <summary>
+        /// Serializes to bytes.
+        /// </summary>
+        /// <returns>System.Byte[][].</returns>
+        /// <exception cref="System.ArgumentNullException">obj</exception>
+        public static byte[] SerializeToBytes(this IJsonSerializer json, object obj, IMemoryStreamFactory streamProvider)
+        {
+            if (obj == null)
+            {
+                throw new ArgumentNullException("obj");
+            }
+
+            using (var stream = streamProvider.CreateNew())
+            {
+                json.SerializeToStream(obj, stream);
+                return stream.ToArray();
+            }
+        }
+
+        public static void AddColumn(this IDbConnection connection, ILogger logger, string table, string columnName, string type)
+        {
+            using (var cmd = connection.CreateCommand())
+            {
+                cmd.CommandText = "PRAGMA table_info(" + table + ")";
+
+                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, columnName, StringComparison.OrdinalIgnoreCase))
+                            {
+                                return;
+                            }
+                        }
+                    }
+                }
+            }
+
+            var builder = new StringBuilder();
+
+            builder.AppendLine("alter table " + table);
+            builder.AppendLine("add column " + columnName + " " + type);
+
+            connection.RunQueries(new[] { builder.ToString() }, logger);
+        }
+    }
+}