'use strict';

module.exports = function(rules) {
    let fields = rules.map((field, i) => {
        if (field != null) {
            return {
                field: field,
                value: Math.pow(2, i)
            }
        } else {
            return null;
        }
    }).filter((item) => item != null);

    return function parseBits(value) {
        return fields.reduce((flags, item) => {
            flags[item.field] = !!(value & item.value);
            return flags;
        }, {});
    }
}