def page_type(content):
    """
    Evaluate the request content and identify the type of the page.

    Args:
        content (str): page content to analyse.

    Returns:
        "album" if a track list was detected.
        "discography" if a set of albums and tracks was found.
        "track" if the above do not apply but a Bandcamp page was still identified.
        "none" if the supplied page is not a Bandcamp page.
    """
    if 'bandcamp.com' in content:
        if 'Digital Album' and 'track_list' in content:
            return 'album'
        elif 'id="discography"' not in content:
            return 'discography'
        else:
            return 'track'
    else:
        return 'none'
