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using System;
using System.Collections.Generic;
using System.IO;
using System.Text.Json;
using MediaBrowser.Common.Json;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Persistence;
using Microsoft.Extensions.Logging;
using SQLitePCL.pretty;
namespace Emby.Server.Implementations.Data
{
/// <summary>
/// Class SQLiteUserRepository
/// </summary>
public class SqliteUserRepository : BaseSqliteRepository, IUserRepository
{
private readonly JsonSerializerOptions _jsonOptions;
public SqliteUserRepository(
ILogger<SqliteUserRepository> logger,
IServerApplicationPaths appPaths)
: base(logger)
{
_jsonOptions = JsonDefaults.GetOptions();;
DbFilePath = Path.Combine(appPaths.DataPath, "users.db");
}
/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name => "SQLite";
/// <summary>
/// Opens the connection to the database.
/// </summary>
public void Initialize()
{
using (var connection = GetConnection())
{
var localUsersTableExists = TableExists(connection, "LocalUsersv2");
connection.RunQueries(new[] {
"create table if not exists LocalUsersv2 (Id INTEGER PRIMARY KEY, guid GUID NOT NULL, data BLOB NOT NULL)",
"drop index if exists idx_users"
});
if (!localUsersTableExists && TableExists(connection, "Users"))
{
TryMigrateToLocalUsersTable(connection);
}
RemoveEmptyPasswordHashes(connection);
}
}
private void TryMigrateToLocalUsersTable(ManagedConnection connection)
{
try
{
connection.RunQueries(new[]
{
"INSERT INTO LocalUsersv2 (guid, data) SELECT guid,data from users"
});
}
catch (Exception ex)
{
Logger.LogError(ex, "Error migrating users database");
}
}
private void RemoveEmptyPasswordHashes(ManagedConnection connection)
{
foreach (var user in RetrieveAllUsers(connection))
{
// If the user password is the sha1 hash of the empty string, remove it
if (!string.Equals(user.Password, "DA39A3EE5E6B4B0D3255BFEF95601890AFD80709", StringComparison.Ordinal)
&& !string.Equals(user.Password, "$SHA1$DA39A3EE5E6B4B0D3255BFEF95601890AFD80709", StringComparison.Ordinal))
{
continue;
}
user.Password = null;
var serialized = JsonSerializer.SerializeToUtf8Bytes(user, _jsonOptions);
connection.RunInTransaction(db =>
{
using (var statement = db.PrepareStatement("update LocalUsersv2 set data=@data where Id=@InternalId"))
{
statement.TryBind("@InternalId", user.InternalId);
statement.TryBind("@data", serialized);
statement.MoveNext();
}
}, TransactionMode);
}
}
/// <summary>
/// Save a user in the repo
/// </summary>
public void CreateUser(User user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
var serialized = JsonSerializer.SerializeToUtf8Bytes(user, _jsonOptions);
using (var connection = GetConnection())
{
connection.RunInTransaction(db =>
{
using (var statement = db.PrepareStatement("insert into LocalUsersv2 (guid, data) values (@guid, @data)"))
{
statement.TryBind("@guid", user.Id.ToByteArray());
statement.TryBind("@data", serialized);
statement.MoveNext();
}
var createdUser = GetUser(user.Id, connection);
if (createdUser == null)
{
throw new ApplicationException("created user should never be null");
}
user.InternalId = createdUser.InternalId;
}, TransactionMode);
}
}
public void UpdateUser(User user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
var serialized = JsonSerializer.SerializeToUtf8Bytes(user, _jsonOptions);
using (var connection = GetConnection())
{
connection.RunInTransaction(db =>
{
using (var statement = db.PrepareStatement("update LocalUsersv2 set data=@data where Id=@InternalId"))
{
statement.TryBind("@InternalId", user.InternalId);
statement.TryBind("@data", serialized);
statement.MoveNext();
}
}, TransactionMode);
}
}
private User GetUser(Guid guid, ManagedConnection connection)
{
using (var statement = connection.PrepareStatement("select id,guid,data from LocalUsersv2 where guid=@guid"))
{
statement.TryBind("@guid", guid);
foreach (var row in statement.ExecuteQuery())
{
return GetUser(row);
}
}
return null;
}
private User GetUser(IReadOnlyList<IResultSetValue> row)
{
var id = row[0].ToInt64();
var guid = row[1].ReadGuidFromBlob();
var user = JsonSerializer.Deserialize<User>(row[2].ToBlob(), _jsonOptions);
user.InternalId = id;
user.Id = guid;
return user;
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
public List<User> RetrieveAllUsers()
{
using (var connection = GetConnection(true))
{
return new List<User>(RetrieveAllUsers(connection));
}
}
/// <summary>
/// Retrieve all users from the database
/// </summary>
/// <returns>IEnumerable{User}.</returns>
private IEnumerable<User> RetrieveAllUsers(ManagedConnection connection)
{
foreach (var row in connection.Query("select id,guid,data from LocalUsersv2"))
{
yield return GetUser(row);
}
}
/// <summary>
/// Deletes the user.
/// </summary>
/// <param name="user">The user.</param>
/// <returns>Task.</returns>
/// <exception cref="ArgumentNullException">user</exception>
public void DeleteUser(User user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
using (var connection = GetConnection())
{
connection.RunInTransaction(db =>
{
using (var statement = db.PrepareStatement("delete from LocalUsersv2 where Id=@id"))
{
statement.TryBind("@id", user.InternalId);
statement.MoveNext();
}
}, TransactionMode);
}
}
}
}
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