From 58d7dc14833bd9ee4b7a53ae851bb7c063779ba3 Mon Sep 17 00:00:00 2001
From: BennyR <reinerbe@hs-weingarten.de>
Date: Thu, 14 Aug 2014 15:03:06 +0200
Subject: [PATCH] Print the expiration date of the license.

---
 cerevoice_tts/src/CerevoiceTts.cpp | 43 ++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/cerevoice_tts/src/CerevoiceTts.cpp b/cerevoice_tts/src/CerevoiceTts.cpp
index d4041a3..1191e9c 100644
--- a/cerevoice_tts/src/CerevoiceTts.cpp
+++ b/cerevoice_tts/src/CerevoiceTts.cpp
@@ -34,6 +34,13 @@
 *     Author: Benjamin Reiner (reineben@hs-weingarten.de)
 *********************************************************************/
 
+#include <iostream>
+#include <fstream>
+#include <ctime>
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/lexical_cast.hpp>
+
 #include "ros/ros.h"
 #include "XmlRpcException.h"
 #include "XmlRpcValue.h"
@@ -130,6 +137,42 @@ bool CerevoiceTts::init()
         return false;
       }
 
+      // search for license expiration date and print it if there's one
+      std::ifstream license_file(license.c_str());
+      std::string line;
+      if(license_file.is_open())
+      {
+        while(getline(license_file, line))
+        {
+          if(boost::algorithm::starts_with(line, "EXP="))
+          {
+            line = line.substr(std::string("EXP=").length());   // cut this string away
+            int year = boost::lexical_cast<int>(line.substr(0, 4));
+            int month = boost::lexical_cast<int>(line.substr(4, 2));
+            int day = boost::lexical_cast<int>(line.substr(6, 2));
+
+            struct std::tm expires = {0, 0, 0, day, month, year - 1900};
+            std::time_t now = time(0);
+            std::time_t expires_time = std::mktime(&expires);
+
+            int difference = static_cast<int>(std::difftime(expires_time, now) / (60 * 60 * 24));
+
+            if(difference < 50)
+              ROS_WARN("Your license expires in %d days on %d/%02d/%02d", difference, year, month, day);
+            else if(difference < 21)
+              ROS_ERROR("Your license expires in %d days on %d/%02d/%02d. Go buy a new one!", difference, year, month, day);
+            else
+              ROS_INFO("Your license expires in %d days on %d/%02d/%02d", difference, year, month, day);
+          }
+        }
+
+        license_file.close();
+      }
+      else
+      {
+        ROS_WARN("Can't open license file '%s", license.c_str());
+      }
+
       // load this voice
       success = CPRCEN_engine_load_voice(engine_, license.c_str(), NULL, path.c_str(), CPRC_VOICE_LOAD);
       if(!success)