@oat-sa/tao-item-runner-qti/dist/scoring/processor/expressions/operators/round.js

TAO QTI Item Runner modules

define(['lodash'], function (_) { 'use strict';

    _ = _ && Object.prototype.hasOwnProperty.call(_, 'default') ? _['default'] : _;

    /*
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License
     * as published by the Free Software Foundation; under version 2
     * of the License (non-upgradable).
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
     *
     * Copyright (c) 2015-2019 (original work) Open Assessment Technlogies SA (under the project TAO-PRODUCT);
     *
     */

    /**
     * Process operands and returns round result.
     * @type {OperatorProcessor}
     * @exports taoQtiItem/scoring/processor/expressions/operators/round
     */
    var roundProcessor = {

        constraints: {
            minOperand: 1,
            maxOperand: 1,
            cardinality: ['single'],
            baseType: ['integer', 'float']
        },

        operands: [],

        /**
         * @returns {?ProcessingValue} a single boolean
         */
        process: function() {

            var result = {
                cardinality: 'single',
                baseType: 'float'
            };
            var value;

            //if at least one operand is null, then break and return null
            if (_.some(this.operands, _.isNull) === true) {
                return null;
            }

            value = this.preProcessor
                .parseOperands(this.operands)
                .value()[0];

            if (_.isNaN(value)) {
                return null;
            }

            if (!_.isFinite(value)) {
                result.value = value;
                return result;
            }

            result.value = Math.round(value);
            return result;
        }
    };

    return roundProcessor;

});