def find_create_channel(name: str, server, parent: int = None):
    channels = server.getChannels()

    for cid, channel in channels.items():
        if parent:
            if channel.name == name and channel.parent == parent:
                return channel
        else:
            if channel.name == name:
                return channel

    new_cid = server.addChannel(name, parent if parent else 0)
    return server.getChannelState(new_cid)


def get_empty_channels(server, parent: int = None):
    empty_channels = []
    channels = server.getChannels()

    for cid, channel in channels.items():
        if parent:
            if channel.parent == parent and len(get_user_for_channel(cid, server)) == 0:
                empty_channels.append(cid)

    return empty_channels


def get_subchannels(server, parent: int):
    sub_channel = []
    channels = server.getChannels()

    for cid, channel in channels.items():
        if channel.parent == parent:
            sub_channel.append(channel)

    return sub_channel


def get_user_for_channel(cid, server):
    users = server.getUsers()
    users_in_channel = {}

    for uid, user in users.items():
        if user.channel == cid:
            users_in_channel[uid] = user

    return users_in_channel