From 4b23552ea8e35fab97f04d3de96b62416cb55fb5 Mon Sep 17 00:00:00 2001
From: Benau <Benau@users.noreply.github.com>
Date: Fri, 8 Nov 2019 01:02:53 +0800
Subject: [PATCH] Add function to extract stk version and OS from user agent

---
 src/utils/string_utils.cpp | 17 +++++++++++++++++
 src/utils/string_utils.hpp |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/src/utils/string_utils.cpp b/src/utils/string_utils.cpp
index 39a650a5c..68ec90486 100644
--- a/src/utils/string_utils.cpp
+++ b/src/utils/string_utils.cpp
@@ -1377,6 +1377,23 @@ namespace StringUtils
         assert(versionToInt("1.0-rc1"         ) ==  10000021);   // same as 1-rc1
     }   // unitTesting
     // ------------------------------------------------------------------------
+    std::pair<std::string, std::string> extractVersionOS(
+                                                 const std::string& user_agent)
+    {
+        std::pair<std::string, std::string> ret;
+        // '#^(SuperTuxKart/[a-z0-9\\.\\-_]+)( \\(.*\\))?$#'
+        std::vector<std::string> out = split(user_agent, '/');
+        if (out.size() != 2 || out[1].empty() || out[1].back() != ')')
+            return ret;
+        std::vector<std::string> out2 = split(out[1], '(');
+        if (out2.size() != 2 || out2[0].empty() || out2[0].back() != ' ' ||
+            out2[1].size() < 2)
+            return ret;
+        ret.first = out2[0].substr(0, out2[0].size() - 1);
+        ret.second = out2[1].substr(0, out2[1].size() - 1);
+        return ret;
+    }   // extractVersionOS
+    // ------------------------------------------------------------------------
     std::string getUserAgentString()
     {
         std::string uagent(std::string("SuperTuxKart/") + STK_VERSION);
diff --git a/src/utils/string_utils.hpp b/src/utils/string_utils.hpp
index 1ad6e52e5..c89128d54 100644
--- a/src/utils/string_utils.hpp
+++ b/src/utils/string_utils.hpp
@@ -300,6 +300,9 @@ namespace StringUtils
      */
     std::string getHostNameFromURL(const std::string& url);
     // ------------------------------------------------------------------------
+    std::pair<std::string, std::string> extractVersionOS(
+                                                const std::string& user_agent);
+    // ------------------------------------------------------------------------
     /* Get line from istream with taking into account for its line ending. */
     inline std::istream& safeGetline(std::istream& is, std::string& t)
     {