app/utils/image.py

import base64
import io
from PIL import Image


def decode_base64_image(base64_string : str):
        #"""Convert base64 string to PIL Image"""
        # Remove data URL prefix if present (e.g., "data:image/jpeg;base64,")
        if ',' in base64_string:
            base64_string = base64_string.split(',')[1]

            # Decode base64 to bytes
        image_bytes = base64.b64decode(base64_string)

            # Convert bytes to PIL Image
        image = Image.open(io.BytesIO(image_bytes))

        return image
        

def validate_image_size(image: Image.Image, max_size_mb: int = 5) -> bool:
         # """Check if image is within size limit"""
    img_byte_arr = io.BytesIO()

    image.save(img_byte_arr, format='JPEG')
    size_mb = img_byte_arr.tell() / (1024 * 1024)


    return size_mb <= max_size_mb


def get_image_mime_type(image: Image.Image) -> str:

    format = image.format.lower() if image.format else 'jpeg'

    mime_types = {
        'jpeg': 'image/jpeg',
        'jpg': 'image/jpeg',
        'png': 'image/png',
        'webp': 'image/webp'
    }
    return mime_types.get(format, 'image/jpeg')