async function get_more(timestamp) {
    return await $.get('/convo/' + timestamp.toISOString());
}

async function get_all_convos() {
    convos = [];
    ts = (new Date());
    x = await get_more(ts);
    convos = convos.concat(x);
    while (true) {
        console.log(convos);
        last = x[x.length-1]
        if (!last) {
            return convos;
        }
        oldest_ts = new Date(last.message[last.message.length-1].sent);
        x = await get_more(oldest_ts);
        convos = convos.concat(x);
    }
    return convos;
}

// exclude can be a list of usernames (['user1', 'user2'], etc.)
function exclude_from_clear(c, exclude=[]) {
    for (user of exclude) {
            if (c.participants.includes(user)) {return false;}
        }
    return true;
}


all_convos = await get_all_convos();
convos_to_clear = all_convos.filter(c => exclude_from_clear(c));
for (c of convos_to_clear) {
    console.log('Clearing ', c);
    $.post('/convo/clear', {id: c._id});
};