fix: missing pack.has_indices if content is not loaded

src/content/ContentPack.cpp

@@ -9,7 +9,10 @@
 #include "data/dv.hpp"
 #include "io/engine_paths.hpp"
 #include "io/io.hpp"
+#include "coders/commons.hpp"
+#include "debug/Logger.hpp"
 
+static debug::Logger logger("content-pack");
 
 namespace fs = std::filesystem;
 
@@ -47,6 +50,24 @@ bool ContentPack::is_pack(const io::path& folder) {
     return io::is_regular_file(folder / PACKAGE_FILENAME);
 }
 
+std::optional<ContentPackStats> ContentPack::loadStats() const {
+    auto contentFile = getContentFile();
+    if (!io::exists(contentFile)) {
+        return std::nullopt;
+    }
+    dv::value object;
+    try {
+        object = io::read_object(contentFile);
+    } catch (const parsing_error& err) {
+        logger.error() << err.errorLog();
+    }
+    ContentPackStats stats {};
+    stats.totalBlocks = object.has("blocks") ? object["blocks"].size() : 0;
+    stats.totalItems = object.has("items") ? object["items"].size() : 0;
+    stats.totalEntities = object.has("entities") ? object["entities"].size() : 0;
+    return stats;
+}
+
 static void checkContentPackId(const std::string& id, const io::path& folder) {
     if (id.length() < 2 || id.length() > 24)
         throw contentpack_error(