World content packs list

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;
+}