social-photos/social_photos/image_processing.py

import pyexiv2
from datetime import datetime

def get_image_data(path: str):
    print(f"Reading metadata: {path}")
    img = pyexiv2.Image(path)
    xmp = img.read_xmp()
    print(xmp)
    create_date = xmp.get('Xmp.xmp.CreateDate', None)
    if create_date is None:
        create_date = convert_datetime_to_iso(xmp.get('Xmp.exif.DateTimeOriginal', 'N/A'))
    else:
        create_date = create_date + "Z"
    
    title = xmp.get('Xmp.dc.title', 'N/A')
    description = xmp.get('Xmp.dc.description', 'N/A')
    tags = xmp.get('Xmp.dc.subject', 'N/A')
    description_parts = description['lang="x-default"'].split('|')
    main_description = description_parts[0].strip()
    alt_text = description_parts[1].strip()
    image_data = {
        'path': path,
        'create': create_date,
        'title': title['lang="x-default"'],
        'description': main_description,
        'alt': alt_text,
        'tags': tags
    }
    return image_data

def add_watermark(file_data):
    ## Create a new image file in the same directory as the file_data['path'] and return
    ## a new file_data dictionary with the new image in place of file_data['path']
    return file_data

def convert_datetime_to_iso(datetime_str):
    try:
        # Parse the datetime string using the format 'YYYY:MM:DD HH:MM:SS.sss'
        datetime_obj = datetime.strptime(datetime_str, '%Y:%m:%d %H:%M:%S.%f')
        # Convert the datetime to ISO format
        iso_datetime = datetime_obj.isoformat()
        return iso_datetime
    except ValueError:
        return None