Update app.py

app.py

@@ -1,8 +1,10 @@
-import gradio as gr, tempfile, os, subprocess, json
+import gradio as gr
+import tempfile, os, subprocess, json
 
 BLENDER = "blender"  # symlinked in Dockerfile
 
 def build_prop(spec_file):
+    # Load and sanity-check JSON
     try:
         spec_path = spec_file.name
         with open(spec_path, "r") as f:
@@ -10,14 +12,15 @@ def build_prop(spec_file):
     except Exception as e:
         return None, f"Invalid JSON: {e}"
 
-    # Minimal validation
-    if "type" not in spec:
+    # Minimal schema checks
+    ptype = spec.get("type")
+    if not ptype:
         return None, "Spec must include a 'type' field (e.g., 'book')."
     if "name" not in spec:
-        spec["name"] = f"{spec['type']}_auto"
+        spec["name"] = f"{ptype}_auto"
 
-    # Choose generator by type (extend later)
-    generator = "generate_book.py" if spec["type"] == "book" else "generate_book.py"
+    # Route to generator (extend here with more types later)
+    generator = "generate_book.py" if ptype == "book" else "generate_book.py"
 
     out_dir = tempfile.mkdtemp()
     cmd = [BLENDER, "-b", "-P", generator, "--", "--spec", spec_path, "--out", out_dir]
@@ -28,7 +31,7 @@ def build_prop(spec_file):
     except subprocess.CalledProcessError as e:
         return None, f"Blender failed:\n{e.stdout}"
 
-    # Return the first .glb in out_dir
+    # Return first .glb produced
     glbs = [os.path.join(out_dir, f) for f in os.listdir(out_dir) if f.lower().endswith(".glb")]
     if not glbs:
         return None, f"No .glb exported.\nLogs:\n{logs}"
@@ -38,8 +41,9 @@ demo = gr.Interface(
     fn=build_prop,
     inputs=gr.File(label="Upload PropSpec JSON"),
     outputs=[gr.File(label="Generated .glb"), gr.Textbox(label="Log")],
-    title="Code-Generated Props (Blender Headless)",
-    description="Upload a JSON PropSpec to generate a .glb (book prop for now)."
+    title="Code‑Generated Props (Blender Headless)",
+    description="Upload a JSON PropSpec (supports 'book' for now) and download a .glb.",
+    allow_flagging="never"  # prevent write-permission errors on HF Spaces
 )
 
 if _name_ == "_main_":