3 files changed, 43 insertions, 14 deletions

diff --git a/assets/opensb/preload.config b/assets/opensb/preload.config
new file mode 100644
index 0000000..f13d799
--- /dev/null
+++ b/assets/opensb/preload.config
@@ -0,0 +1,6 @@
+[
+    {
+        "type": "json",
+        "path": "/player.config:inventoryFilters"
+    }
+] 
diff --git a/source/base/StarAssets.cpp b/source/base/StarAssets.cpp
index 8471a0c..5bb752e 100644
--- a/source/base/StarAssets.cpp
+++ b/source/base/StarAssets.cpp
@@ -23,7 +23,7 @@
 #include "StarUtilityLuaBindings.hpp"
 
 namespace Star {
-
+    
 static void validateBasePath(std::string_view const& basePath) {
   if (basePath.empty() || basePath[0] != '/')
     throw AssetException(strf("Path '{}' must be absolute", basePath));
@@ -353,6 +353,20 @@ Assets::Assets(Settings settings, StringList assetSources) {
   int workerPoolSize = m_settings.workerPoolSize;
   for (int i = 0; i < workerPoolSize; i++)
     m_workerThreads.append(Thread::invoke("Assets::workerMain", mem_fn(&Assets::workerMain), this));
+  
+  // preload.config contains an array of files which will be loaded and then told to persist
+  Json preload = json("/preload.config");
+  Logger::info("Preloading assets");
+  for (auto script : preload.iterateArray()) {
+    auto type = AssetTypeNames.getLeft(script.getString("type"));
+    auto path = script.getString("path");
+    auto components = AssetPath::split(path);
+    validatePath(components, type == AssetType::Json || type == AssetType::Image, type == AssetType::Image);
+
+    auto asset = getAsset(AssetId{type, std::move(components)});
+    // make this asset never unload
+    asset->forcePersist = true;
+  }
 }
 
 Assets::~Assets() {
@@ -626,23 +640,23 @@ size_t Assets::AssetIdHash::operator()(AssetId const& id) const {
 }
 
 bool Assets::JsonData::shouldPersist() const {
-  return !json.unique();
+  return forcePersist || !json.unique();
 }
 
 bool Assets::ImageData::shouldPersist() const {
-  return !alias && !image.unique();
+  return forcePersist || !alias && !image.unique();
 }
 
 bool Assets::AudioData::shouldPersist() const {
-  return !audio.unique();
+  return forcePersist || !audio.unique();
 }
 
 bool Assets::FontData::shouldPersist() const {
-  return !font.unique();
+  return forcePersist || !font.unique();
 }
 
 bool Assets::BytesData::shouldPersist() const {
-  return !bytes.unique();
+  return forcePersist || !bytes.unique();
 }
 
 FramesSpecification Assets::parseFramesSpecification(Json const& frameConfig, String path) {
diff --git a/source/base/StarAssets.hpp b/source/base/StarAssets.hpp
index 6ffcb05..a8e4480 100644
--- a/source/base/StarAssets.hpp
+++ b/source/base/StarAssets.hpp
@@ -71,20 +71,20 @@ public:
     StringList digestIgnore;
   };
 
-    enum class AssetType {
-    Json,
-    Image,
-    Audio,
-    Font,
-    Bytes
-  };
-
   enum class QueuePriority {
     None,
     Working,
     PostProcess,
     Load
   };
+  
+  enum class AssetType {
+    Json,
+    Image,
+    Audio,
+    Font,
+    Bytes
+  };
 
   struct AssetId {
     AssetType type;
@@ -107,6 +107,7 @@ public:
 
     double time = 0.0;
     bool needsPostProcessing = false;
+    bool forcePersist = false;
   };
 
   struct JsonData : AssetData {
@@ -255,6 +256,14 @@ public:
   void cleanup();
 
 private:
+  EnumMap<AssetType> const AssetTypeNames{
+      {AssetType::Json, "json"},
+      {AssetType::Image, "image"},
+      {AssetType::Audio, "audio"},
+      {AssetType::Font, "font"},
+      {AssetType::Bytes, "bytes"}
+  };
+  
   static FramesSpecification parseFramesSpecification(Json const& frameConfig, String path);
 
   void queueAssets(List<AssetId> const& assetIds) const;