/// <summary>
/// 获取群信息
/// </summary>
/// <param name="groupId">群号码</param>
/// <param name="notCache">不使用缓存, 通常为 <code>false</code>, 仅在必要时使用</param>
/// <returns>如果成功返回 <see cref="GroupInfo"/>, 若失败返回 null</returns>
public GroupInfo GetGroupInfo(long groupId, bool notCache = false)
{
string result = CQP.CQ_getGroupInfo(_authCode, groupId, false).ToString(_defaultEncoding);
if (string.IsNullOrEmpty(result))
{
return(null);
}
#region --其他_转换_文本到群信息--
using (BinaryReader reader = new BinaryReader(new MemoryStream(Convert.FromBase64String(result))))
{
if (reader.Length() < 18)
{
return(null);
}
GroupInfo info = new GroupInfo();
info.Id = reader.ReadInt64_Ex();
info.Name = reader.ReadString_Ex(_defaultEncoding);
info.CurrentNumber = reader.ReadInt32_Ex();
info.MaximumNumber = reader.ReadInt32_Ex();
return(info);
}
#endregion
}
/// <summary>
/// 获取群信息
/// </summary>
/// <param name="groupId">目标群号</param>
/// <param name="notCache">不使用缓存, 通常为 <code>false</code>, 仅在必要时使用</param>
/// <exception cref="ArgumentOutOfRangeException">参数: groupId 超出范围</exception>
/// <exception cref="InvalidDataException">数据流格式错误或为 null</exception>
/// <exception cref="EndOfStreamException">无法读取数据, 因为已读取到数据流末尾</exception>
/// <returns>获取成功返回 <see cref="GroupInfo"/> 对象, 失败返回 <see langword="null"/></returns>
public GroupInfo GetGroupInfo(long groupId, bool notCache = false)
{
if (groupId < Group.MinValue)
{
throw new ArgumentOutOfRangeException("groupId");
}
string data = CQP.CQ_getGroupInfo(this.AppInfo.AuthCode, groupId, notCache).ToString(CQApi.DefaultEncoding);
if (string.IsNullOrEmpty(data))
{
#if DEBUG
throw new InvalidDataException("获取的数据流格式无效");
#else
return(null);
#endif
}
try
{
return(new GroupInfo(this, data, false));
}
catch
{
#if DEBUG
throw;
#else
return(null);
#endif
}
}
