add subgroups for fishing rods to encounter json

tools/jsonproc/jsonproc.cpp

@@ -65,21 +65,6 @@ int main(int argc, char *argv[])
         return get_custom_var(key);
     });
 
-    env.add_callback("trackVar", 2, [](Arguments& args) {
-        static int counter = 0;
-
-        int addValue = args.at(0)->get<int>();
-        int checkValue = args.at(1)->get<int>();
-
-        bool over = false;
-
-        counter = (counter + addValue) % (checkValue + 1);
-
-        if (counter <= addValue) over = true;
-
-        return over;
-    });
-
     env.add_callback("concat", 2, [](Arguments& args) {
         string first = args.at(0)->get<string>();
         string second = args.at(1)->get<string>();
@@ -106,6 +91,11 @@ int main(int argc, char *argv[])
         return rawValue.substr(0, i);
     });
 
+    // single argument is a json object
+    env.add_callback("isEmpty", 1, [](Arguments& args) {
+        return args.at(0)->empty();
+    });
+
     try
     {
         env.write_with_json_file(templateFilepath, jsonfilepath, outputFilepath);