Add local Draco optimization for GLB uploads

server/index.js

@@ -95,6 +95,7 @@ const CONVERTIBLE_MODEL_FORMATS = new Map([
     [".step", "step"],
     [".stp", "step"]
 ]);
+const GLB_DRACO_OPTIMIZABLE_FORMATS = new Set(["glb"]);
 
 const nowIso = () => new Date().toISOString();
 
@@ -2593,8 +2594,22 @@ const handleRawUpload = async (req, res, url) => {
     const uploadedAt = nowIso();
     const sha256 = await calculateFileSha256(targetPath);
     const src = path.join("uploads", uploadId, assetId, versionId, safeName).replace(/\\/g, "/");
+    const rawSourceFormat = path.extname(safeName).replace(/^\./, "").toLowerCase();
     const sourceFormat = CONVERTIBLE_MODEL_FORMATS.get(path.extname(safeName).toLowerCase());
-    const reusableOriginal = await findReusableOriginalBySha256({sha256, sourceFormat, targetPath});
+    const modelSourceFormat = sourceFormat || rawSourceFormat || "file";
+    const dracoOptimization = !sourceFormat && GLB_DRACO_OPTIMIZABLE_FORMATS.has(modelSourceFormat)
+        ? {
+            status: "queued",
+            targetFormat: "gltf",
+            compression: "draco",
+            updatedAt: uploadedAt
+        }
+        : null;
+    const reusableOriginal = await findReusableOriginalBySha256({
+        sha256,
+        sourceFormat: modelSourceFormat === "file" ? null : modelSourceFormat,
+        targetPath
+    });
     const sourceDedup = reusableOriginal
         ? {
             sourceDedupMode: await linkOrCopyUploadFile(reusableOriginal.sourcePath, targetPath),
@@ -2613,10 +2628,12 @@ const handleRawUpload = async (req, res, url) => {
         sha256,
         sourceSrc: src,
         downloadSrc: src,
-        sourceFormat: sourceFormat || path.extname(safeName).replace(/^\./, "").toLowerCase() || "file",
+        sourceFormat: modelSourceFormat,
         status: sourceFormat ? "conversion_required" : "ready",
-        targetFormat: sourceFormat ? "xkt" : null,
+        targetFormat: sourceFormat ? "xkt" : (dracoOptimization ? "gltf" : null),
         uploadedAt,
+        message: dracoOptimization ? "Model is ready. Draco optimization queued." : "Model is ready.",
+        ...(dracoOptimization ? {dracoOptimization} : {}),
         ...(sourceDedup || {})
     };
 
@@ -2658,7 +2675,6 @@ const handleRawUpload = async (req, res, url) => {
 
     await writeJSONFile(manifestPathForSource(targetPath), {
         ...versionRecord,
-        message: "Model is ready.",
         updatedAt: uploadedAt
     });
     await upsertAssetVersion(assetDir, versionRecord);