From 00863566ec4601c65c435b74e575d49546a1c707 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sat, 7 Dec 2019 03:36:21 +0300
Subject: split server into multiple components

In a vague attempt to make header files more readable, split server/
into a number of components.
Also, refactor the unit tests to use the "Data-driven test cases" of
Boost.Test.
---
 server/common/log.hpp | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 server/common/log.hpp

(limited to 'server/common/log.hpp')

diff --git a/server/common/log.hpp b/server/common/log.hpp
new file mode 100644
index 0000000..ca0fafd
--- /dev/null
+++ b/server/common/log.hpp
@@ -0,0 +1,49 @@
+#pragma once
+
+#include <boost/format.hpp>
+#include <boost/system/error_code.hpp>
+
+#include <ctime>
+
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <string_view>
+#include <thread>
+#include <utility>
+
+namespace math::server::log {
+
+namespace details {
+
+inline std::thread::id get_tid() { return std::this_thread::get_id(); }
+
+inline std::string get_timestamp() {
+    const auto tt = std::time(nullptr);
+    std::ostringstream oss;
+    oss << std::put_time(std::gmtime(&tt), "%Y-%m-%d %H:%M:%S");
+    return oss.str();
+}
+
+inline void log(const std::string& msg) {
+    std::clog << get_timestamp() << " | " << get_tid() << " | " << msg << '\n';
+}
+
+}
+
+template <typename... Args>
+inline void log(const std::string_view& fmt, Args&&... args) {
+    details::log(boost::str((boost::format(fmt.data()) % ... % args)));
+}
+
+template <typename... Args>
+inline void error(const std::string_view& fmt, Args&&... args) {
+    details::log(boost::str((boost::format(fmt.data()) % ... % args)));
+}
+
+inline void error(const boost::system::error_code& ec) {
+    details::log(ec.message());
+}
+
+}
-- 
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