add seed_file_management.h holding SeedFileManager

CMakeLists.txt

@@ -184,7 +184,7 @@ add_subdirectory(lib/da_threading EXCLUDE_FROM_ALL)
     endif(NOT CMAKE_EXE_LINKER_FLAGS MATCHES "-fuse-ld=lld")
   endif()
 
-add_executable(fortuna main.cpp generator.cpp generator.h fortuna.cpp fortuna.h accumulator.cpp accumulator.h pool.cpp pool.h event_adder.h event_adder_impl.h event_scheduler.h entropy_src.h urandom_entropy_src.h do_task.cpp do_task.h util.h)
+add_executable(fortuna main.cpp generator.cpp generator.h fortuna.cpp fortuna.h accumulator.cpp accumulator.h pool.cpp pool.h event_adder.h event_adder_impl.h event_scheduler.h entropy_src.h urandom_entropy_src.h do_task.cpp do_task.h util.h seed_file_management.h)
 # ref: https://cmake.org/pipermail/cmake/2016-May/063400.html
 target_link_libraries(fortuna
     PRIVATE cryptopp

seed_file_management.h

@@ -0,0 +1,37 @@
+#ifndef FORTUNA_SEED_FILE_MANAGER_H
+#define FORTUNA_SEED_FILE_MANAGER_H
+
+#include <chrono>
+#include <string>
+
+#include "accumulator.h"
+#include "do_task.h"
+
+namespace fortuna {
+
+class SeedFileManager {
+public:
+	struct conf
+	{
+		std::chrono::minutes write_interval{10};
+		std::string seed_f_path = "./fortuna.seed";
+		std::size_t seed_f_length = 64;
+
+		conf(){};
+	};
+
+private:
+	const conf config;
+	DoTask do_task;
+	fortuna::accumulator::Accumulator& accumulator;
+
+	auto write_seed_file() -> void;
+	auto update_seed_file() -> void;
+
+public:
+	SeedFileManager(conf config, fortuna::accumulator::Accumulator& accumulator);
+}; // class SeedFileManager
+
+} // namespace fortuna
+
+#endif // FORTUNA_SEED_FILE_MANAGER_H