assets preloading with preload.json

src/data/dynamic.cpp

@@ -155,6 +155,34 @@ void Map::str(std::string key, std::string& dst) const {
     dst = getStr(key, dst);
 }
 
+std::string Map::getStr(std::string key) const {
+    if (values.find(key) == values.end()) {
+        throw std::runtime_error("missing key '"+key+"'");
+    }
+    return getStr(key, "");
+}
+
+double Map::getNum(std::string key) const {
+    if (values.find(key) == values.end()) {
+        throw std::runtime_error("missing key '"+key+"'");
+    }
+    return getNum(key, 0);
+}
+
+int64_t Map::getInt(std::string key) const {
+    if (values.find(key) == values.end()) {
+        throw std::runtime_error("missing key '"+key+"'");
+    }
+    return getInt(key, 0);
+}
+
+bool Map::getBool(std::string key) const {
+    if (values.find(key) == values.end()) {
+        throw std::runtime_error("missing key '"+key+"'");
+    }
+    return getBool(key, false);
+}
+
 std::string Map::getStr(std::string key, const std::string& def) const {
     auto found = values.find(key);
     if (found == values.end())