Updated: Added _seed to config.

This seeds the random number generator, so different BBS
systems won't have predictable cards.

CMakeLists.txt

@@ -55,7 +55,7 @@ add_custom_command(
 
 if(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/SQLiteCpp)
   message("***")
-  message("*** ERROR/MISSING *** please run: git clone https://github.com/SRombauts/SQLiteCpp.git")
+  message("*** ERROR/MISSING *** please run: git clone https://github.com/SRombauts/SQLiteCpp.git --depth 1")
   message("***")
 endif()
 
@@ -65,7 +65,7 @@ add_subdirectory(SQLiteCpp)
 
 if(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp)
   message("***")
-  message("*** ERROR/MISSING *** please run: git clone https://github.com/jbeder/yaml-cpp.git")
+  message("*** ERROR/MISSING *** please run: git clone https://github.com/jbeder/yaml-cpp.git --depth 1")
   message("***")
 endif()
 

main.cpp

@@ -250,6 +250,18 @@ int main(int argc, char *argv[]) {
     update_config = true;
   }
 
+  if (!config["_seed"]) {
+    // pick numbers to use for seed
+    std::string seeds;
+    seeds += std::to_string(rng());
+    seeds += ",";
+    seeds += std::to_string(rng());
+    seeds += ",";
+    seeds += std::to_string(rng());
+    config["_seed"] = seeds;
+    update_config = true;
+  }
+
   // save configuration -- something was updated
   if (update_config) {
     std::ofstream fout("space-ace.yaml");

play.cpp

@@ -41,6 +41,21 @@ PlayCards::PlayCards(door::Door &d, DBData &dbd, std::mt19937 &r)
     days_played = 0;
   }
 
+  {
+    std::string seed = config["_seed"].as<std::string>();
+    if (get_logger) {
+      get_logger() << "seed: " << seed << std::endl;
+    }
+
+    std::vector<std::string> parts = split(seed, ',');
+    for (auto &p : parts) {
+      seeds.push_back(std::stol(p));
+      if (get_logger) {
+        get_logger() << "seed " << p << std::endl;
+      }
+    }
+  }
+
   /*
    * TODO:  Check the date with the db.  Have they already played up today?  If
    * so, display calendar and find a day they can play.  Or, play missed hands
@@ -298,8 +313,14 @@ next_hand:
     time_t tt = std::chrono::system_clock::to_time_t(play_day);
     tm local_tm = *localtime(&tt);
 
-    std::seed_seq seq{local_tm.tm_year + 1900, local_tm.tm_mon + 1,
-                      local_tm.tm_mday, hand};
+    std::vector<int> rand_seed_seq = seeds;
+    rand_seed_seq.push_back(local_tm.tm_year + 1900);
+    rand_seed_seq.push_back(local_tm.tm_mon + 1);
+    rand_seed_seq.push_back(local_tm.tm_mday);
+    rand_seed_seq.push_back(hand);
+    // std::seed_seq seq{local_tm.tm_year + 1900, local_tm.tm_mon + 1,
+    //                   local_tm.tm_mday, hand};
+    std::seed_seq seq(rand_seed_seq.begin(), rand_seed_seq.end());
     deck = shuffleCards(seq, 1);
     state = makeCardStates();
   }

play.h

@@ -13,7 +13,8 @@ private:
   door::Door &door;
   DBData &db;
   std::mt19937 &rng;
-
+  std::vector <int>seeds;
+  
   int month_last_day;
   /**
    * These map to the positions on the screen that displays the calendar.  This

utils.cpp

@@ -63,3 +63,20 @@ std::vector<std::pair<int, int>> find_words(const std::string &text) {
   }
   return words;
 }
+
+// From: https://stackoverflow.com/questions/236129/how-do-i-iterate-over-the-words-of-a-string
+
+std::vector<std::string> split(const std::string &text, char sep) {
+    std::vector<std::string> tokens;
+    std::size_t start = 0, end = 0;
+    while ((end = text.find(sep, start)) != std::string::npos) {
+        if (end != start) {
+          tokens.push_back(text.substr(start, end - start));
+        }
+        start = end + 1;
+    }
+    if (end != start) {
+       tokens.push_back(text.substr(start));
+    }
+    return tokens;
+}

utils.h

@@ -18,6 +18,7 @@ void string_toupper(std::string &str);
 bool iequals(const std::string &a, const std::string &b);
 
 std::vector<std::pair<int, int>> find_words(const std::string &text);
+std::vector<std::string> split(const std::string &text, char sep);
 
 // logger access
 extern std::function<std::ofstream &(void)> get_logger;