habitica/migrations/20130307_exp_overflow.js

// mongo habitrpg ./node_modules/underscore/underscore.js ./migrations/20130307_normalize_algo_values.js

/**
 * Make sure people aren't overflowing their exp with the new system
 */
db.users.find().forEach(function(user){
    function oldTnl(level) {
        return (Math.pow(level,2)*10)+(level*10)+80
    }

    function newTnl(level) {
        var value = 0;
        if (level >= 100) {
            value = 0
        } else {
            value = Math.round(((Math.pow(level,2)*0.25)+(10 * level) + 139.75)/10)*10; // round to nearest 10
        }
        return value
    }

    var newTnl = newTnl(user.stats.lvl);
    if (user.stats.exp > newTnl) {
        var percent = user.stats.exp / oldTnl(user.stats.lvl);
        percent = (percent>1) ? 1 : percent;
        user.stats.exp = newTnl * percent;

        try {
            db.users.update(
                {_id:user._id},
                {$set: {'stats.exp': user.stats.exp}},
                {multi:true}
            );
        } catch(e) {
            print(e);
        }

    }

})