/// <summary>
/// Retrieves messages.
/// </summary>
/// <param name="start">Start message ID.</param>
/// <param name="end">End message ID.</param>
/// <param name="direction">Query direction (defaults to NewToOld).</param>
/// <param name="limit">Limits the number of returned results. Its default value is 100.</param>
/// <param name="messageType">The message type to query. The default value is 0 (text message).</param>
/// <returns></returns>
public async Task <ReadOnlyCollection <LCIMMessage> > QueryMessages(LCIMMessageQueryEndpoint start = null,
LCIMMessageQueryEndpoint end = null,
LCIMMessageQueryDirection direction = LCIMMessageQueryDirection.NewToOld,
int limit = 20,
int messageType = 0)
{
return(await Client.MessageController.QueryMessages(Id, start, end, direction, limit, messageType));
}
internal async Task <ReadOnlyCollection <LCIMMessage> > QueryMessages(string convId,
LCIMMessageQueryEndpoint start = null,
LCIMMessageQueryEndpoint end = null,
LCIMMessageQueryDirection direction = LCIMMessageQueryDirection.NewToOld,
int limit = 20,
int messageType = 0)
{
LogsCommand logs = new LogsCommand {
Cid = convId
};
if (start != null)
{
logs.T = start.SentTimestamp;
logs.Mid = start.MessageId;
logs.TIncluded = start.IsClosed;
}
if (end != null)
{
logs.Tt = end.SentTimestamp;
logs.Tmid = end.MessageId;
logs.TtIncluded = end.IsClosed;
}
logs.Direction = direction == LCIMMessageQueryDirection.NewToOld ?
LogsCommand.Types.QueryDirection.Old : LogsCommand.Types.QueryDirection.New;
logs.Limit = limit;
if (messageType != 0)
{
logs.Lctype = messageType;
}
GenericCommand request = NewCommand(CommandType.Logs, OpType.Open);
request.LogsMessage = logs;
GenericCommand response = await Connection.SendRequest(request);
// 反序列化聊天记录
return(response.LogsMessage.Logs.Select(item => {
LCIMMessage message;
if (item.Bin)
{
// 二进制消息
byte[] bytes = Convert.FromBase64String(item.Data);
message = LCIMBinaryMessage.Deserialize(bytes);
}
else
{
// 类型消息
message = LCIMTypedMessage.Deserialize(item.Data);
}
message.ConversationId = convId;
message.Id = item.MsgId;
message.FromClientId = item.From;
message.SentTimestamp = item.Timestamp;
message.DeliveredTimestamp = item.AckAt;
message.ReadTimestamp = item.ReadAt;
message.PatchedTimestamp = item.PatchTimestamp;
message.MentionAll = item.MentionAll;
message.MentionIdList = item.MentionPids.ToList();
message.Mentioned = message.MentionAll ||
message.MentionIdList.Contains(Client.Id);
return message;
}).ToList().AsReadOnly());
}
