import Ember from 'ember';

export function isIndeterminate(params) {
    var dates = params[0];
    if(dates == null) {
        return false;
    }

    var decade = [];
    var next = params[1] + 10;
    while(params[1] < next) {
        decade.push(params[1]);
        params[1] ++;
    }

    var filter = decade.filter(function(date){ return dates.indexOf(date) > -1; });
    if(filter.length !== decade.length && filter.length) {
        return true;
    }
    return false;
}

export default Ember.Helper.helper(isIndeterminate);