Update app.py

app.py

@@ -16,7 +16,7 @@ REPO_ID = os.getenv("HF_REPO_ID")
 # Initialize Hugging Face API
 login(token=HF_TOKEN)
 api = HfApi()
-    
+
 @app.route('/upload', methods=['POST'])
 def upload_image():
     try:
@@ -51,9 +51,30 @@ def upload_image():
                 "upload_timestamp": datetime.utcnow().isoformat(),
             }
 
-            # Write metadata to metadata.jsonl
+            # Path for temporary metadata file
             metadata_file = os.path.join(temp_dir, "metadata.jsonl")
-            with open(metadata_file, "a") as f:
+
+            # Try to download existing metadata.jsonl from the repository
+            try:
+                api.hf_hub_download(
+                    repo_id=REPO_ID,
+                    filename="metadata.jsonl",
+                    repo_type="dataset",
+                    local_dir=temp_dir,
+                )
+                # Read existing metadata and append new entry
+                with open(metadata_file, "r") as f:
+                    existing_metadata = f.readlines()
+            except Exception:
+                # If metadata.jsonl doesn't exist, start with an empty list
+                existing_metadata = []
+
+            # Append new metadata
+            with open(metadata_file, "w") as f:
+                # Write existing metadata back
+                for line in existing_metadata:
+                    f.write(line)
+                # Append new metadata
                 f.write(json.dumps(metadata) + "\n")
 
             # Upload to Hugging Face