improve run time calc code

Author: JimsterCoder

core/WebServer/WebServer.cpp

@@ -18,6 +18,8 @@ WebServer::WebServer(std::vector<monitor::Monitor*> &mons,
     m_running(true)
 
 {
+    m_start_time = std::chrono::system_clock::now();
+
     // Disable all Mongoose logging to console
     mg_log_level = 0;
 
@@ -153,12 +155,11 @@ void WebServer::handleStatusPage(struct mg_connection *c, struct mg_http_message
     std::time_t now_time = std::chrono::system_clock::to_time_t(now);
 
     // run time
-    static auto start_time = std::chrono::system_clock::now();
-    std::chrono::duration<double> elapsed_seconds = now - start_time;
+    std::chrono::duration<double> elapsed_seconds = now - m_start_time;
     double hours = elapsed_seconds.count() / 3600.0;
 
     html << "<p><b>Current Time:</b> " << std::ctime(&now_time) << "</p>";
-    html << "<p><b>Run Time:</b> " << fmt1(hours,2) << " hours</p>";
+    html << "<p><b>Run Time:</b> " << fmt1(hours,3) << " hours</p>";
 
     // ---- Main table ----
     html << "<table>";

core/WebServer/WebServer.hpp

@@ -47,6 +47,8 @@ class WebServer {
 
     std::vector<monitor::Monitor*> &m_monitor;
     contactor::Contactor* m_main_contactor;
+
+    std::chrono::system_clock::time_point m_start_time;
 };
 
 } // namespace core

monitor/monitor.cpp

@@ -1,5 +1,6 @@
 #include "Monitor.hpp"
 #include "bitset"
+#include <iomanip>
 #include <chrono>
 namespace monitor
 {
@@ -15,7 +16,8 @@ namespace monitor
       std::chrono::duration<double> elapsed_seconds = nowtime - start;
 
       os << "Current Time: " << std::ctime(&now_time);
-      os << "Run Time: " << 0.001 * int(1000.0 * (int(elapsed_seconds.count() + 0.5) / 3600.0)) << " hours" << std::endl;
+      os << "Run Time: " << std::fixed << std::setprecision(3) << (elapsed_seconds.count() / 3600.0) << " hours" << std::endl;
+      os << std::defaultfloat << std::setprecision(6);   
 
       os << "Battery Number:       ";
       for (i = 0; i < vm.size(); i++)