Cleaned prefab parser a lot

src/dawntools/prefabtool/PrefabChildParser.cpp

@@ -0,0 +1,61 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "PrefabChildParser.hpp"
+
+using namespace Dawn;
+
+std::vector<std::string> PrefabChildParser::getRequiredAttributes() {
+  return std::vector<std::string>();
+}
+
+std::map<std::string, std::string> PrefabChildParser::getOptionalAttributes() {
+  return {
+    { "ref", "" },
+    { "position", "" },
+    { "scale", "" }
+  };
+}
+
+int32_t PrefabChildParser::onParse(
+  Xml *node,
+  std::map<std::string, std::string> values,
+  struct PrefabChild *out,
+  std::string *error
+) {
+  out->ref = values["ref"];
+
+  if(values["position"].size() > 0) {
+    out->position = vec3Parser(values["position"], error);
+    if(error->size() > 0) return 1;
+  }
+
+  if(values["scale"].size() > 0) {
+    out->scale = vec3Parser(values["scale"], error);
+    if(error->size() > 0) return 1;
+  }
+
+  auto itChildren = node->children.begin();
+  while(itChildren != node->children.end()) {
+    // Parse child nodes, they may be components or not
+    auto c = *itChildren;
+    if(c->node == "child") {
+      struct PrefabChild child;
+      child.registry = out->registry;
+      auto ret = (PrefabChildParser()).parse(c, &child, error);
+      if(ret != 0) return ret;
+      out->children.push_back(child);
+    } else {
+      struct PrefabComponent component;
+      component.registry = out->registry;
+      auto ret = (PrefabComponentParser()).parse(c, &component, error);
+      if(ret != 0) return ret;
+      out->components.push_back(component);
+    }
+    ++itChildren;
+  }
+
+  return 0;
+}