LevelEditorLayer.cpp implemented and PlayLayer.cpp modified (#31)

* LevelEditorLayer.cpp implemented

* Added background string ID to PlayLayer

* Improved getting method for ShaderLayer in LevelEditorLayer

* Revert change in PlayLayer

src/LevelEditorLayer.cpp

@@ -0,0 +1,37 @@
+#include <Geode/Bindings.hpp>
+#include <Geode/modify/LevelEditorLayer.hpp>
+#include <Geode/utils/cocos.hpp>
+#include <Geode/utils/NodeIDs.hpp>
+
+#include "IDCheck.hpp"
+
+using namespace geode::prelude;
+using namespace geode::node_ids;
+
+$register_ids(LevelEditorLayer) {
+	setIDSafe<GJEffectManager>(this, 0, "effect-manager");
+
+	if (auto shaderLayer = getChildOfType<ShaderLayer>(this, 0)) {
+		setIDSafe(shaderLayer, 1, "main-node");
+		setIDSafe<CCSprite>(static_cast<CCNode*>(shaderLayer->getChildren()->objectAtIndex(1)), 0, "background");
+	} else {
+		setIDSafe(this, 1, "main-node");
+		setIDSafe<CCSprite>(static_cast<CCNode*>(this->getChildren()->objectAtIndex(1)), 0, "background");
+	}
+}
+
+struct LevelEditorLayerIDs : Modify<LevelEditorLayerIDs, LevelEditorLayer> {
+	static void onModify(auto& self) {
+		if (!self.setHookPriority("LevelEditorLayer::init", GEODE_ID_PRIORITY)) {
+			log::warn("Failed to set LevelEditorLayer::init hook priority, node IDs may not work properly");
+		}
+	}
+
+	bool init(GJGameLevel* level, bool p1) {
+		if (!LevelEditorLayer::init(level, p1)) return false;
+
+		NodeIDs::get()->provide(this);
+
+		return true;
+	}
+};

src/PlayLayer.cpp

@@ -10,6 +10,8 @@ using namespace geode::node_ids;
 
 $register_ids(PlayLayer) {
     setIDSafe(this, 1, "main-node");
+    setIDSafe<CCSprite>(static_cast<CCNode*>(this->getChildren()->objectAtIndex(1)), 0, "background");
+
     setIDSafe(this, 3, "hitbox-node");
     setIDSafe<GJEffectManager>(this, 0, "effect-manager");
     //setIDSafe<UILayer>(this, 0, "ui-layer"); //changing this id is unsafe because mods depend on "UILayer", which is actually fairly safe to do, since this is the only UILayer in the whole layer