World content packs list

res/texts/en_US.txt

@@ -1,6 +1,7 @@
 # Menu
 menu.missing-content=Missing Content!
 world.convert-request=Content indices have changed! Convert world files?
+error.pack-not-found=Could not to find pack
 
 # Bindings
 movement.forward=Forward

res/texts/ru_RU.txt

@@ -6,6 +6,8 @@ Cancel=Отмена
 Back=Назад
 Continue=Продолжить
 
+error.pack-not-found=Не удалось найти пакет
+
 # Меню
 menu.New World=Новый Мир
 menu.Quit=Выход

res/texts/su_SU.txt

@@ -6,6 +6,8 @@ Cancel=Отмена
 Back = Обратно
 Continue=Продолжить
 
+error.pack-not-found=Не удалось найти пакет
+
 # Меню
 menu.New World = Новый Мир
 menu.Quit=Выход

src/content/ContentPack.cpp

@@ -1,9 +1,11 @@
 #include "ContentPack.h"
 
+#include <iostream>
 #include <stdexcept>
 
-#include "../files/files.h"
 #include "../coders/json.h"
+#include "../files/files.h"
+#include "../files/engine_paths.h"
 
 namespace fs = std::filesystem;
 
@@ -44,3 +46,21 @@ void ContentPack::scan(fs::path rootfolder,
         packs.push_back(read(folder));
     }
 }
+
+std::vector<std::string> ContentPack::worldPacksList(fs::path folder) {
+    fs::path listfile = folder / fs::path("packs.list");
+    if (!fs::is_regular_file(listfile)) {
+        std::cerr << "warning: packs.list not found (will be created)";
+        std::cerr << std::endl;
+        files::write_string(listfile, "# autogenerated, do not modify\nbase\n");
+    }
+    return files::read_list(listfile);
+}
+
+fs::path ContentPack::findPack(const EnginePaths* paths, std::string name) {
+    auto folder = paths->getResources() / fs::path("content") / fs::path(name);
+    if (!fs::is_directory(folder)) {
+        throw std::runtime_error("could not to find pack '"+name+"'");
+    }
+    return folder;
+}

src/content/ContentPack.h

@@ -5,6 +5,8 @@
 #include <vector>
 #include <filesystem>
 
+class EnginePaths;
+
 struct ContentPack {
     std::string id = "none";
     std::string title = "untitled";
@@ -19,6 +21,8 @@ struct ContentPack {
     static ContentPack read(std::filesystem::path folder);
     static void scan(std::filesystem::path folder, 
                      std::vector<ContentPack>& packs);
+    static std::vector<std::string> worldPacksList(std::filesystem::path folder);
+    static std::filesystem::path findPack(const EnginePaths* paths, std::string name);
 };
 
 #endif // CONTENT_CONTENT_PACK_H_

src/files/files.cpp

@@ -7,15 +7,10 @@
 #include <stdexcept>
 #include "../coders/json.h"
 
-using std::ios;
-using std::string;
-using std::unique_ptr;
-using std::ifstream;
-using std::ofstream;
-using std::filesystem::path;
+namespace fs = std::filesystem;
 
-bool files::write_bytes(path filename, const char* data, size_t size) {
-	ofstream output(filename, ios::binary);
+bool files::write_bytes(fs::path filename, const char* data, size_t size) {
+	std::ofstream output(filename, std::ios::binary);
 	if (!output.is_open())
 		return false;
 	output.write(data, size);
@@ -23,8 +18,8 @@ bool files::write_bytes(path filename, const char* data, size_t size) {
 	return true;
 }
 
-uint files::append_bytes(path filename, const char* data, size_t size) {
-	ofstream output(filename, ios::binary | ios::app);
+uint files::append_bytes(fs::path filename, const char* data, size_t size) {
+	std::ofstream output(filename, std::ios::binary | std::ios::app);
 	if (!output.is_open())
 		return 0;
 	uint position = output.tellp();
@@ -33,8 +28,8 @@ uint files::append_bytes(path filename, const char* data, size_t size) {
 	return position;
 }
 
-bool files::read(path filename, char* data, size_t size) {
-	ifstream output(filename, ios::binary);
+bool files::read(fs::path filename, char* data, size_t size) {
+	std::ifstream output(filename, std::ios::binary);
 	if (!output.is_open())
 		return false;
 	output.read(data, size);
@@ -42,31 +37,32 @@ bool files::read(path filename, char* data, size_t size) {
 	return true;
 }
 
-char* files::read_bytes(path filename, size_t& length) {
-	ifstream input(filename, ios::binary);
+char* files::read_bytes(fs::path filename, size_t& length) {
+	std::ifstream input(filename, std::ios::binary);
 	if (!input.is_open())
 		return nullptr;
 	input.seekg(0, std::ios_base::end);
 	length = input.tellg();
 	input.seekg(0, std::ios_base::beg);
 
-	unique_ptr<char> data(new char[length]);
+	std::unique_ptr<char> data(new char[length]);
 	input.read(data.get(), length);
 	input.close();
 	return data.release();
 }
 
-std::string files::read_string(path filename) {
+std::string files::read_string(fs::path filename) {
 	size_t size;
-	unique_ptr<char> chars (read_bytes(filename, size));
+	std::unique_ptr<char> chars (read_bytes(filename, size));
 	if (chars == nullptr) {
-		throw std::runtime_error("could not to load file '"+filename.string()+"'");
+		throw std::runtime_error("could not to load file '"+
+								 filename.string()+"'");
 	}
-	return string(chars.get(), size);
+	return std::string(chars.get(), size);
 }
 
-bool files::write_string(path filename, const string content) {
-	ofstream file(filename);
+bool files::write_string(fs::path filename, const std::string content) {
+	std::ofstream file(filename);
 	if (!file) {
 		return false;
 	}
@@ -74,8 +70,8 @@ bool files::write_string(path filename, const string content) {
 	return true;
 }
 
-json::JObject* files::read_json(path file) {
-	string text = files::read_string(file);
+json::JObject* files::read_json(fs::path file) {
+	std::string text = files::read_string(file);
 	try {
 		return json::parse(file.string(), text);
 	} catch (const parsing_error& error) {
@@ -83,3 +79,20 @@ json::JObject* files::read_json(path file) {
         throw std::runtime_error("could not to parse "+file.string());
     }
 }
+
+std::vector<std::string> files::read_list(std::filesystem::path filename) {
+	std::ifstream file(filename);
+	if (!file) {
+		throw std::runtime_error("could not to open file "+filename.u8string());
+	}
+	std::vector<std::string> lines;
+	std::string line;
+	while (std::getline(file, line)) {
+		if (line.length() == 0)
+			continue;
+		if (line[0] == '#')
+			continue;
+		lines.push_back(line);
+	}
+	return lines;
+}

src/files/files.h

@@ -2,6 +2,7 @@
 #define FILES_FILES_H_
 
 #include <string>
+#include <vector>
 #include <filesystem>
 #include "../typedefs.h"
 
@@ -17,6 +18,7 @@ namespace files {
     extern std::string read_string(std::filesystem::path filename);
     extern bool write_string(std::filesystem::path filename, const std::string content);
     extern json::JObject* read_json(std::filesystem::path file);
+    extern std::vector<std::string> read_list(std::filesystem::path file);
 }
 
 #endif /* FILES_FILES_H_ */

src/frontend/menu.cpp

@@ -159,15 +159,27 @@ Panel* create_main_menu_panel(Engine* engine, PagesControl* menu) {
             button->color(vec4(1.0f, 1.0f, 1.0f, 0.1f));
             button->listenAction([=](GUI* gui) {
                 // TODO: complete and move somewhere
+
+                auto folder = paths->getWorldsFolder()/u8path(name);
                 auto resdir = engine->getPaths()->getResources();
                 auto& packs = engine->getContentPacks();
                 packs.clear();
-                packs.push_back(ContentPack::read(resdir/path("content/base")));
+                auto packnames = ContentPack::worldPacksList(folder);
+                for (auto name : packnames) {
+                    path packfolder;
+                    try {
+                        packfolder = ContentPack::findPack(paths, name);
+                    } catch (std::runtime_error& error) {
+                        guiutil::alert(gui, langs::get(L"error.pack-not-found")+
+                                       L": "+util::str2wstr_utf8(name));
+                        return;
+                    }
+                    packs.push_back(ContentPack::read(packfolder));
+                }
                 engine->loadContent();
 
                 auto* content = engine->getContent();
                 auto& settings = engine->getSettings();
-                auto folder = paths->getWorldsFolder()/u8path(name);
                 std::filesystem::create_directories(folder);
                 ContentLUT* lut = World::checkIndices(folder, content);
                 if (lut) {