nim_session_online_service_helper.h

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#ifndef _NIM_CPP_SESSION_ONLINE_SERVICE_HELPER_H_
#define _NIM_CPP_SESSION_ONLINE_SERVICE_HELPER_H_
 
#include <functional>
#include <list>
#include <string>
#include "nim_cpp_wrapper/helper/nim_msg_helper.h"
#include "nim_cpp_wrapper/helper/nim_talk_helper.h"
#include "nim_cpp_wrapper/nim_sdk_cpp_wrapper.h"
#include "nim_define_include.h"
#include "nim_wrapper_util/nim_json_util.h"
namespace nim {
class NIM_SDK_CPPWRAPPER_DLL_API SessionOnLineServiceHelper {
public:
    struct NIM_SDK_CPPWRAPPER_DLL_API SessionInfo {
        SessionInfo()
            : last_message_("")
            , last_message_type_(0) {}
        std::string id_;           
        NIMSessionType type_;      
        std::string ext_;          
        std::string last_message_; 
        uint64_t update_time_;     
        int last_message_type_;    
        // 返回普通消息 auto last_msg = SessionInfo.GetLastMessage<0>();
        template <int type>
        auto GetLastMessage() const -> typename std::enable_if<type == 0, IMMessage>::type {
            IMMessage msg;
            ParseReceiveMessage(last_message_, msg);
            return msg;
        }
        // 返回消息撤回通知auto last_msg = SessionInfo.GetLastMessage<1>();
        template <int type>
        auto GetLastMessage() const -> typename std::enable_if<type == 1, RecallMsgNotify>::type {
            RecallMsgNotify recall_notify_msg;
            ParseRecallMsgNotify(last_message_, recall_notify_msg);
            return recall_notify_msg;
        }
    };
    typedef std::list<SessionInfo> SessionList; 
    struct NIM_SDK_CPPWRAPPER_DLL_API QuerySessionListResult {
        nim::NIMResCode res_code;  
        SessionList session_list_; 
        bool has_more_;            
    };
    struct NIM_SDK_CPPWRAPPER_DLL_API DeleteSessionParam {
        void AddSession(nim::NIMSessionType /*to_type */, std::string /*session_id */);
        std::list<std::pair<nim::NIMSessionType /*to_type */, std::string /*session_id */>> delete_list_; 
    };
    static bool ParseSessionInfo(const std::string& session_json, SessionInfo& session);
 
    static bool ParseQuerySessionListResult(const std::string& sessions_json, QuerySessionListResult& result);
 
    static std::string DeleteSessionParamToJsonString(const DeleteSessionParam& param);
};
}  // namespace nim
 
#endif  //_NIM_CPP_SESSION_ONLINE_SERVICE_HELPER_H_