Fix content storage usage with relative paths

#1966

Source/Engine/Content/BinaryAsset.cpp

@@ -323,26 +323,29 @@ bool BinaryAsset::SaveToAsset(const StringView& path, AssetInitData& data, bool
 {
     // Ensure path is in a valid format
     String pathNorm(path);
-    FileSystem::NormalizePath(pathNorm);
+    ContentStorageManager::FormatPath(pathNorm);
+    const StringView filePath = pathNorm;
 
     // Find target storage container and the asset
-    auto storage = ContentStorageManager::TryGetStorage(pathNorm);
-    auto asset = Content::GetAsset(pathNorm);
+    auto storage = ContentStorageManager::TryGetStorage(filePath);
+    auto asset = Content::GetAsset(filePath);
     auto binaryAsset = dynamic_cast<BinaryAsset*>(asset);
     if (asset && !binaryAsset)
     {
         LOG(Warning, "Cannot write to the non-binary asset location.");
         return true;
     }
+    if (!binaryAsset && !storage && FileSystem::FileExists(filePath))
+    {
+        // Force-resolve storage (asset at that path could be not yet loaded into registry)
+        storage = ContentStorageManager::GetStorage(filePath);
+    }
 
     // Check if can perform write operation to the asset container
-    if (storage)
+    if (storage && !storage->AllowDataModifications())
     {
-        if (!storage->AllowDataModifications())
-        {
-            LOG(Warning, "Cannot write to the asset storage container.");
-            return true;
-        }
+        LOG(Warning, "Cannot write to the asset storage container.");
+        return true;
     }
 
     // Initialize data container
@@ -352,6 +355,11 @@ bool BinaryAsset::SaveToAsset(const StringView& path, AssetInitData& data, bool
         // Use the same asset ID
         data.Header.ID = binaryAsset->GetID();
     }
+    else if (storage && storage->GetEntriesCount())
+    {
+        // Use the same file ID
+        data.Header.ID = storage->GetEntry(0).ID;
+    }
     else
     {
         // Randomize ID
@@ -373,8 +381,8 @@ bool BinaryAsset::SaveToAsset(const StringView& path, AssetInitData& data, bool
     }
     else
     {
-        ASSERT(pathNorm.HasChars());
-        result = FlaxStorage::Create(pathNorm, data, silentMode);
+        ASSERT(filePath.HasChars());
+        result = FlaxStorage::Create(filePath, data, silentMode);
     }
     if (binaryAsset)
         binaryAsset->_isSaving = false;

Source/Engine/Content/Content.cpp

@@ -449,18 +449,19 @@ Asset* Content::LoadAsync(const StringView& path, const ScriptingTypeHandle& typ
 {
     // Ensure path is in a valid format
     String pathNorm(path);
-    StringUtils::PathRemoveRelativeParts(pathNorm);
+    ContentStorageManager::FormatPath(pathNorm);
+    const StringView filePath = pathNorm;
 
 #if USE_EDITOR
-    if (!FileSystem::FileExists(pathNorm))
+    if (!FileSystem::FileExists(filePath))
     {
-        LOG(Error, "Missing file \'{0}\'", pathNorm);
+        LOG(Error, "Missing file \'{0}\'", filePath);
         return nullptr;
     }
 #endif
 
     AssetInfo assetInfo;
-    if (GetAssetInfo(pathNorm, assetInfo))
+    if (GetAssetInfo(filePath, assetInfo))
     {
         return LoadAsync(assetInfo.ID, type);
     }

Source/Engine/Content/Storage/ContentStorageManager.cpp

@@ -6,6 +6,7 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Engine/Engine.h"
 #include "Engine/Engine/EngineService.h"
+#include "Engine/Engine/Globals.h"
 #include "Engine/Platform/FileSystem.h"
 #include "Engine/Profiler/ProfilerCPU.h"
 #include "Engine/Threading/TaskGraph.h"
@@ -185,6 +186,16 @@ void ContentStorageManager::EnsureUnlocked()
     Locker.Unlock();
 }
 
+void ContentStorageManager::FormatPath(String& path)
+{
+    StringUtils::PathRemoveRelativeParts(path);
+    if (FileSystem::IsRelative(path))
+    {
+        // Convert local-project paths into absolute format which is used by Content Storage system
+        path = Globals::ProjectFolder / path;
+    }
+}
+
 bool ContentStorageManager::IsFlaxStoragePath(const String& path)
 {
     auto extension = FileSystem::GetExtension(path).ToLower();

Source/Engine/Content/Storage/ContentStorageManager.h

@@ -75,6 +75,9 @@ public:
     /// </summary>
     static void EnsureUnlocked();
 
+    // Formats path into valid format used by the storage system (normalized and absolute).
+    static void FormatPath(String& path);
+
 public:
     /// <summary>
     /// Determines whether the specified path can be a binary asset file (based on it's extension).