log_message.hpp

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#pragma once

#include <fc/config.hpp>
#include <fc/time.hpp>
#include <fc/variant_object.hpp>
#include <memory>
#include <string>

namespace fc
{
   namespace detail
   {
      class log_context_impl;
      class log_message_impl;
   }

   class log_level
   {
      public:
         enum values
         {
            all,
            debug,
            info,
            warn,
            error,
            off
         };
         log_level( values v = off ):value(v){}
         explicit log_level( int v ):value( static_cast<values>(v)){}
         operator int()const { return value; }
         values value;
   };

   void to_variant( log_level e, variant& v, uint32_t max_depth = 1 );
   void from_variant( const variant& e, log_level& ll, uint32_t max_depth = 1 );

   class log_context
   {
      public:
        log_context();
        log_context( log_level ll,
                     const char* file,
                     uint64_t line,
                     const char* method );
        ~log_context();
        explicit log_context( const variant& v, uint32_t max_depth );
        variant to_variant( uint32_t max_depth )const;

        std::string   get_file()const;
        uint64_t      get_line_number()const;
        std::string   get_method()const;
        std::string   get_thread_name()const;
        std::string   get_task_name()const;
        std::string   get_host_name()const;
        time_point    get_timestamp()const;
        log_level     get_log_level()const;
        std::string   get_context()const;

        void          append_context( const std::string& c );

        std::string   to_string()const;
      private:
        std::shared_ptr<detail::log_context_impl> my;
   };

   void to_variant( const log_context& l, variant& v, uint32_t max_depth );
   void from_variant( const variant& l, log_context& c, uint32_t max_depth );

   class log_message
   {
      public:
         log_message();
         log_message( log_context ctx, std::string format, variant_object args = variant_object() );
         ~log_message();

         log_message( const variant& v, uint32_t max_depth );
         variant        to_variant(uint32_t max_depth)const;

         std::string    get_message()const;

         log_context    get_context()const;
         std::string    get_format()const;
         variant_object get_data()const;

      private:
         std::shared_ptr<detail::log_message_impl> my;
   };

   void    to_variant( const log_message& l, variant& v, uint32_t max_depth );
   void    from_variant( const variant& l, log_message& c, uint32_t max_depth );

   typedef std::vector<log_message> log_messages;


} // namespace fc

FC_REFLECT_TYPENAME( fc::log_message );

#ifndef __func__
#define __func__ __FUNCTION__
#endif

#define FC_LOG_CONTEXT(LOG_LEVEL) \
   fc::log_context( fc::log_level::LOG_LEVEL, (const char*)__FILE__, __LINE__, (const char*)__func__ )

#define FC_LOG_MESSAGE( LOG_LEVEL, FORMAT, ... ) \
   fc::log_message( FC_LOG_CONTEXT(LOG_LEVEL), \
                    FORMAT, \
                    fc::limited_mutable_variant_object( FC_MAX_LOG_OBJECT_DEPTH, true )__VA_ARGS__ )