#!/usr/bin/env python
import bs4


def convert_element(lines, level=1):
    result = ''
    for line in lines:
        if not isinstance(line, bs4.element.Tag) or \
           line.name != 'outline':
            continue
        result += '*' * level + ' ' + line.attrs.get('text', '') + '\n'
        if 'note' in line.attrs:
            result += line.attrs['note'].replace('\r', '\n') + '\n'
        result += convert_element(line.children, level + 1)
    return result


def convert_file(path):
    root = bs4.BeautifulSoup(open(path), "lxml")
    return convert_element(root.select('html body opml')[0])

def main():
    import sys
    output_path = sys.argv[1][:-4] + 'org'
    result = convert_file(sys.argv[1])
    open(output_path, 'w').write(result)

if __name__ == '__main__':
    main()