fix: check tflite model and download if doesn't exist

services/face_extractor.py

@@ -5,6 +5,7 @@ import mediapipe as mp
 from mediapipe.tasks import python
 from mediapipe.tasks.python import vision
 import os
+import urllib.request
 
 class FaceExtractor:
     def __init__(self, model_path: str = None):
@@ -15,6 +16,14 @@ class FaceExtractor:
         else:
             self.model_path = model_path
             
+        # Bulletproof check: Ensure the file exists and is a valid binary (not a Git LFS pointer)
+        if not os.path.exists(self.model_path) or os.path.getsize(self.model_path) < 2000:
+            print(f"Valid model not found at {self.model_path}. Auto-downloading...")
+            os.makedirs(os.path.dirname(self.model_path), exist_ok=True)
+            url = "https://storage.googleapis.com/mediapipe-models/face_detector/blaze_face_short_range/float16/latest/blaze_face_short_range.tflite"
+            urllib.request.urlretrieve(url, self.model_path)
+            print("Download complete.")
+            
         base_options = python.BaseOptions(model_asset_path=self.model_path)
         options = vision.FaceDetectorOptions(
             base_options=base_options,