session_logger.h

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// SPDX-License-Identifier: Apache-2.0
#pragma once
 
#include <entropic/entropic_export.h>
#include <cstdio>
#include <filesystem>
#include <string>
 
namespace entropic {
 
class SessionLogger {
public:
    ENTROPIC_EXPORT explicit SessionLogger(
        const std::filesystem::path& log_dir);
 
    ENTROPIC_EXPORT ~SessionLogger();
 
    SessionLogger(const SessionLogger&) = delete;
    SessionLogger& operator=(const SessionLogger&) = delete;
 
    ENTROPIC_EXPORT void log_user_input(const std::string& input);
 
    ENTROPIC_EXPORT void log_raw_token(const char* token, size_t len);
 
    ENTROPIC_EXPORT void end_turn();
 
    ENTROPIC_EXPORT bool is_open() const;
 
    static void raw_token_callback(
        const char* token, size_t len, void* user_data);
 
private:
    FILE* fp_ = nullptr; 
};
 
} // namespace entropic