Add: blur hash utils function

backend/utils/hash.py

@@ -1,6 +1,10 @@
 from blake3 import blake3
+from blurhash import encode
+
 from tqdm.auto import tqdm
 
+from PIL import Image
+
 
 def compute_blake3_hash(data, is_file=False, logger=None):
     """
@@ -45,3 +49,34 @@ def compute_file_hash_blake3(file_path, logger=None):
 
 def compute_string_hash_blake3(string, logger=None):
     return compute_blake3_hash(string, is_file=False, logger=logger)
+
+
+def compute_blur_hash(image_path, components_x=4, components_y=4, logger=None):
+    """
+    Compute the BlurHash of an image.
+
+    Args:
+        image_path (str): Path to the image file.
+        components_x (int): Number of horizontal components for BlurHash.
+        components_y (int): Number of vertical components for BlurHash.
+        logger: Optional logger for error messages.
+
+    Returns:
+        str: BlurHash string or None if an error occurs.
+    """
+    try:
+        with Image.open(image_path) as img:
+            img = img.convert("RGB")  # Ensure it's in RGB mode
+            blur_hash = encode(img, components_x, components_y)
+            return blur_hash
+
+    except Exception as e:
+        error_message = f"Error computing BlurHash: {e}"
+
+        if logger:
+            if hasattr(logger, "style") and hasattr(logger, "stdout"):  # Django command
+                logger.stdout.write(logger.style.WARNING(error_message))
+            else:  # Default to tqdm
+                tqdm.write(error_message)
+
+        return None