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using MediaBrowser.Common.Serialization;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Persistence;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Data;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.Logging;
namespace MediaBrowser.Server.Sqlite
{
/// <summary>
/// Class SQLiteUserRepository
/// </summary>
[Export(typeof(IUserRepository))]
public class SQLiteUserRepository : SqliteRepository, IUserRepository
{
/// <summary>
/// The repository name
/// </summary>
public const string RepositoryName = "SQLite";
/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return RepositoryName;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SQLiteUserDataRepository" /> class.
/// </summary>
/// <param name="logger">The logger.</param>
[ImportingConstructor]
protected SQLiteUserRepository([Import("logger")] ILogger logger)
: base(logger)
{
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(Kernel.Instance.ApplicationPaths.DataPath, "users.db");
await ConnectToDB(dbFile).ConfigureAwait(false);
string[] queries = {
"create table if not exists users (guid GUID primary key, data BLOB)",
"create index if not exists idx_users on users(guid)",
"create table if not exists schema_version (table_name primary key, version)",
//pragmas
"pragma temp_store = memory"
};
RunQueries(queries);
}
/// <summary>
/// Save a user in the repo
/// </summary>
/// <param name="user">The user.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">user</exception>
public Task SaveUser(User user, CancellationToken cancellationToken)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
return Task.Run(() =>
{
cancellationToken.ThrowIfCancellationRequested();
var serialized = JsonSerializer.SerializeToBytes(user);
cancellationToken.ThrowIfCancellationRequested();
var cmd = connection.CreateCommand();
cmd.CommandText = "replace into users (guid, data) values (@1, @2)";
cmd.AddParam("@1", user.Id);
cmd.AddParam("@2", serialized);
QueueCommand(cmd);
});
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public IEnumerable<User> RetrieveAllUsers()
{
var cmd = connection.CreateCommand();
cmd.CommandText = "select data from users";
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
{
while (reader.Read())
{
using (var stream = GetStream(reader, 0))
{
var user = JsonSerializer.DeserializeFromStream<User>(stream);
yield return user;
}
}
}
}
/// <summary>
/// Deletes the user.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">user</exception>
public Task DeleteUser(User user, CancellationToken cancellationToken)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
return Task.Run(() =>
{
cancellationToken.ThrowIfCancellationRequested();
var cmd = connection.CreateCommand();
cmd.CommandText = "delete from users where guid=@guid";
var guidParam = cmd.Parameters.Add("@guid", DbType.Guid);
guidParam.Value = user.Id;
return ExecuteCommand(cmd);
});
}
}
}
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