lua: file library

src/files/engine_paths.cpp

@@ -6,37 +6,35 @@
 
 #define SCREENSHOTS_FOLDER "screenshots"
 
-namespace fs = std::filesystem;
-
 fs::path EnginePaths::getUserfiles() const {
-	return userfiles;
+    return userfiles;
 }
 
 fs::path EnginePaths::getResources() const {
-	return resources;
+    return resources;
 }
 
 fs::path EnginePaths::getScreenshotFile(std::string ext) {
-	fs::path folder = userfiles/fs::path(SCREENSHOTS_FOLDER);
-	if (!fs::is_directory(folder)) {
-		fs::create_directory(folder);
-	}
+    fs::path folder = userfiles/fs::path(SCREENSHOTS_FOLDER);
+    if (!fs::is_directory(folder)) {
+        fs::create_directory(folder);
+    }
 
-	auto t = std::time(nullptr);
+    auto t = std::time(nullptr);
     auto tm = *std::localtime(&t);
 
-	const char* format = "%Y-%m-%d_%H-%M-%S";
-	std::stringstream ss;
-	ss << std::put_time(&tm, format);
-	std::string datetimestr = ss.str();
+    const char* format = "%Y-%m-%d_%H-%M-%S";
+    std::stringstream ss;
+    ss << std::put_time(&tm, format);
+    std::string datetimestr = ss.str();
 
-	fs::path filename = folder/fs::path("screenshot-"+datetimestr+"."+ext);
-	uint index = 0;
-	while (fs::exists(filename)) {
-		filename = folder/fs::path("screenshot-"+datetimestr+"-"+std::to_string(index)+"."+ext);
-		index++;
-	}
-	return filename;
+    fs::path filename = folder/fs::path("screenshot-"+datetimestr+"."+ext);
+    uint index = 0;
+    while (fs::exists(filename)) {
+        filename = folder/fs::path("screenshot-"+datetimestr+"-"+std::to_string(index)+"."+ext);
+        index++;
+    }
+    return filename;
 }
 
 fs::path EnginePaths::getWorldsFolder() {
@@ -44,15 +42,45 @@ fs::path EnginePaths::getWorldsFolder() {
 }
 
 bool EnginePaths::isWorldNameUsed(std::string name) {
-	return fs::exists(EnginePaths::getWorldsFolder()/fs::u8path(name));
+    return fs::exists(EnginePaths::getWorldsFolder()/fs::u8path(name));
 }
 
 void EnginePaths::setUserfiles(fs::path folder) {
-	this->userfiles = folder;
+    this->userfiles = folder;
 }
 
 void EnginePaths::setResources(fs::path folder) {
-	this->resources = folder;
+    this->resources = folder;
+}
+
+void EnginePaths::setContentPacks(std::vector<ContentPack>* contentPacks) {
+    this->contentPacks = contentPacks;
+}
+
+fs::path EnginePaths::resolve(std::string path) {
+    size_t separator = path.find(':');
+    if (separator == std::string::npos) {
+        return fs::path(path);
+    }
+    std::string prefix = path.substr(0, separator);
+    std::string filename = path.substr(separator+1);
+
+    if (prefix == "res" || prefix == "core") {
+        return resources/fs::path(filename);
+    }
+
+    if (prefix == "user") {
+        return userfiles/fs::path(filename);
+    }
+
+    if (contentPacks) {
+        for (auto& pack : *contentPacks) {
+            if (pack.id == prefix) {
+                return pack.folder/fs::path(filename);
+            }
+        }
+    }
+    return fs::path("./"+filename);
 }
 
 ResPaths::ResPaths(fs::path mainRoot, std::vector<fs::path> roots)