util/image_utils.py

import base64

def to_base64_bytes(data: bytes) -> str:
    return base64.b64encode(data).decode("utf-8")

def file_to_base64(path: str) -> str:
    with open(path, "rb") as f:
        return to_base64_bytes(f.read())

def is_image_name(name: str) -> bool:
    return name.lower().endswith((".png", ".jpg", ".jpeg", ".bmp", ".gif", ".webp"))