Content menu, content-pack dependencies

src/files/WorldFiles.cpp

@@ -453,13 +453,18 @@ void WorldFiles::write(const World* world, const Content* content) {
 }
 
 void WorldFiles::writePacks(const World* world) {
+    auto packsFile = getPacksFile();
+    if (fs::is_regular_file(packsFile)) {
+        return;
+    }
+
 	const auto& packs = world->getPacks();
 	std::stringstream ss;
 	ss << "# autogenerated; do not modify\n";
 	for (const auto& pack : packs) {
 		ss << pack.id << "\n";
 	}
-	files::write_string(getPacksFile(), ss.str());
+	files::write_string(packsFile, ss.str());
 }
 
 void WorldFiles::writeIndices(const ContentIndices* indices) {
@@ -574,3 +579,15 @@ bool WorldFiles::readPlayer(Player* player) {
     }
 	return true;
 }
+
+void WorldFiles::addPack(const std::string& id) {
+    auto packs = files::read_list(getPacksFile());
+    packs.push_back(id);
+
+	std::stringstream ss;
+	ss << "# autogenerated; do not modify\n";
+	for (const auto& pack : packs) {
+		ss << pack << "\n";
+	}
+	files::write_string(getPacksFile(), ss.str());
+}

src/files/WorldFiles.h

@@ -146,6 +146,8 @@ public:
 	void write(const World* world, const Content* content);
 	void writePacks(const World* world);
 	void writeIndices(const ContentIndices* indices);
+    /* Append pack to packs.list without duplicate check */
+    void addPack(const std::string& id);
 
     static const char* WORLD_FILE;
 };

src/files/engine_paths.cpp

@@ -43,6 +43,10 @@ fs::path EnginePaths::getWorldsFolder() {
     return userfiles/fs::path("worlds");
 }
 
+fs::path EnginePaths::getWorldFolder() {
+    return worldFolder;
+}
+
 std::vector<fs::path> EnginePaths::scanForWorlds() {
     std::vector<fs::path> folders;
 

src/files/engine_paths.h

@@ -12,7 +12,7 @@ namespace fs = std::filesystem;
 class EnginePaths {
     fs::path userfiles {"."};
     fs::path resources {"res"}; 
-    fs::path worldFolder {""};
+    fs::path worldFolder;
     std::vector<ContentPack>* contentPacks = nullptr;
 public:
     fs::path getUserfiles() const;
@@ -20,6 +20,7 @@ public:
     
     fs::path getScreenshotFile(std::string ext);
     fs::path getWorldsFolder();
+    fs::path getWorldFolder();
     bool isWorldNameUsed(std::string name);
 
     void setUserfiles(fs::path folder);