/// <summary>
/// 初始化 <see cref="User"/> 类的新实例。
/// </summary>
/// <param name="username">用户名。</param>
/// <param name="password">用户密码。</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="username"/> 为 null
/// 或
/// <paramref name="password"/> 为 null。
/// </exception>
public User(string username, string password)
{
Contract.NotNull(username, nameof(username));
Contract.NotNull(password, nameof(password));
Id = ObjectId.GenerateNewId();
Username = username;
PasswordHash = PasswordUtils.GetPasswordHash(password);
JoinTime = DateTime.UtcNow;
}
/// <summary>
/// 更新给定用户的密码。
/// </summary>
/// <param name="username">要更新的用户的用户名。</param>
/// <param name="password">要更新的用户的新密码。</param>
/// <returns>是否成功地更新了用户的密码。</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="username"/> 为 null
/// 或
/// <paramref name="password"/> 为 null。
/// </exception>
/// <exception cref="RepositoryException">访问底层数据源时出现错误。</exception>
public async Task <bool> UpdatePasswordAsync(string username, string password)
{
Contract.NotNull(username, nameof(username));
Contract.NotNull(password, nameof(password));
var passwordHash = PasswordUtils.GetPasswordHash(password);
var updateResult = await ThrowRepositoryExceptionOnErrorAsync(
async (collection, _) => await collection.UpdateOneAsync(
GetKeyFilter(username),
Builders <User> .Update.Set(u => u.PasswordHash, passwordHash)));
return(updateResult.MatchedCount == 1);
}
