#pragma once
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#include <string>
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#include <fstream>
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#include <chrono>
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#include <experimental/filesystem>
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#include "../vp_utils.h"
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namespace vp_utils {
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// log file writer, write log to local file. auto create new log file bye date.
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// NOT thread safe, MUST use in single thread.
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class vp_log_file_writer
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{
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private:
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// ready to go
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bool inited = false;
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// root dir for log saving
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std::string log_dir;
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// log file name template, such as `<year>-<mon>-<day>.txt`, refer to vp_utils::time_format(...) for rule details
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std::string log_file_name_template;
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// file handle
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std::ofstream log_writer;
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// get valid log file name including path, name and extension
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std::string create_valid_log_file_name();
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// current log day (1 ~ 31)
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int log_day = 0;
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// get day of now
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int get_now_day();
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#define NOW std::chrono::system_clock::now()
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public:
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vp_log_file_writer();
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~vp_log_file_writer();
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// write log
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void write(std::string log);
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// initialize writer
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void init(std::string log_dir, std::string log_file_name_template);
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// for << operator
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vp_log_file_writer& operator<<(std::string log);
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};
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}
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