From 8a3d208ba81a7413607b0feb3e1414b03a3dde11 Mon Sep 17 00:00:00 2001
From: LaG1924 <12997935+LaG1924@users.noreply.github.com>
Date: Fri, 15 Feb 2019 22:24:04 +0500
Subject: Added lua-support

---
 src/AssetManager.cpp | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/AssetManager.hpp |  5 +++++
 2 files changed, 55 insertions(+)

(limited to 'src')

diff --git a/src/AssetManager.cpp b/src/AssetManager.cpp
index 71800d7..1ae9929 100644
--- a/src/AssetManager.cpp
+++ b/src/AssetManager.cpp
@@ -11,6 +11,7 @@
 #define STB_IMAGE_IMPLEMENTATION
 #define STBI_ONLY_PNG
 #include <stb_image.h>
+#include <sol.hpp>
 
 #include "Utility.hpp"
 
@@ -24,10 +25,12 @@ std::map<BlockId, std::string> blockIdToBlockName;
 std::unique_ptr<AssetTreeNode> assetTree;
 std::unique_ptr<TextureAtlas> atlas;
 std::map<BlockId, BlockFaces> blockIdToBlockFaces;
+sol::state lua;
 
 void LoadIds();
 void LoadAssets();
 void LoadTextures();
+void LoadScripts();
 
 void WalkDirEntry(const fs::directory_entry &dirEntry, AssetTreeNode *node);
 void ParseAsset(AssetTreeNode &node);
@@ -35,6 +38,7 @@ void ParseAssetTexture(AssetTreeNode &node);
 void ParseAssetBlockModel(AssetTreeNode &node);
 void ParseAssetBlockState(AssetTreeNode &node);
 void ParseAssetShader(AssetTreeNode &node);
+void ParseAssetScript(AssetTreeNode &node);
 
 void ParseBlockModels();
 
@@ -58,6 +62,7 @@ void AssetManager::InitAssetManager()
 
 	LoadIds();
 	ParseBlockModels();
+	LoadScripts();
 }
 
 void LoadIds() {
@@ -96,6 +101,38 @@ void LoadTextures() {
 	atlas = std::make_unique<TextureAtlas>(textureData);
 }
 
+void LoadScripts() {
+	lua.open_libraries(sol::lib::base, sol::lib::table);
+
+	LOG(INFO) << "Loading lua-init-scripts";
+	std::vector<std::string> loadedScripts;
+	std::vector<std::string> failedScripts;
+
+	AssetTreeNode *node = AssetManager::GetAssetByAssetName("/");
+	for (auto &it : node->childs) {
+		for (auto &child : it->childs) {
+			if (child->name == "init") {
+				AssetScript *asset = dynamic_cast<AssetScript *>(child->asset.get());
+				if (!asset) {
+					LOG(ERROR) << "Unrecognised script file /" << it->name;
+					continue;
+				}
+				try {
+					lua.script(asset->code);
+				}
+				catch (sol::error &e) {
+					LOG(ERROR) << "LUA init-script " << child->name << " failed: " << e.what();
+					failedScripts.push_back(it->name);
+					continue;
+				}
+				loadedScripts.push_back(it->name);
+			}
+		}
+	}
+
+	LOG(INFO) << "Lua loaded: " << loadedScripts.size() << "   failed: " << failedScripts.size();
+}
+
 void WalkDirEntry(const fs::directory_entry &dirEntry, AssetTreeNode *node) {
 	for (auto &file : fs::directory_iterator(dirEntry)) {
 		node->childs.push_back(std::make_unique<AssetTreeNode>());
@@ -138,6 +175,11 @@ void ParseAsset(AssetTreeNode &node) {
 		ParseAssetShader(node);
 		return;
 	}
+
+	if (node.name == "init") {
+		ParseAssetScript(node);
+		return;
+	}
 }
 
 void ParseAssetTexture(AssetTreeNode &node) {
@@ -380,6 +422,14 @@ void ParseAssetShader(AssetTreeNode &node) {
 	}
 }
 
+void ParseAssetScript(AssetTreeNode &node) {
+	node.asset = std::make_unique<AssetScript>();
+	AssetScript *asset = dynamic_cast<AssetScript*>(node.asset.get());
+	asset->code = std::string((char*)node.data.data(), (char*)node.data.data() + node.data.size());
+	node.data.clear();
+	node.data.shrink_to_fit();
+}
+
 void ParseBlockModels() {
 	std::string textureName;
 
diff --git a/src/AssetManager.hpp b/src/AssetManager.hpp
index de3881e..97e1d63 100644
--- a/src/AssetManager.hpp
+++ b/src/AssetManager.hpp
@@ -10,6 +10,7 @@
 #include <glm/vec4.hpp>
 #include <glm/vec3.hpp>
 #include <glm/mat4x4.hpp>
+#include <sol_forward.hpp>
 
 #include "Vector.hpp"
 #include "Block.hpp"
@@ -167,6 +168,10 @@ struct AssetShader : Asset {
 	std::unique_ptr<Shader> shader;
 };
 
+struct AssetScript : Asset {
+	std::string code;
+};
+
 namespace AssetManager {
 	void InitAssetManager();
 
-- 
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