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

TAO QTI Item Runner modules

define(['lodash', 'taoQtiItem/scoring/processor/errorHandler'], function (_, errorHandler) { 'use strict';

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

    /*
     * 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 delete result.
     * @type {OperatorProcessor}
     * @exports taoQtiItem/scoring/processor/expressions/operators/delete
     */
    var deleteProcessor = {
        constraints: {
            minOperand: 2,
            maxOperand: 2,
            cardinality: ['multiple', 'single', 'ordered'],
            baseType: [
                'identifier',
                'boolean',
                'integer',
                'float',
                'string',
                'point',
                'pair',
                'directedPair',
                'file',
                'uri',
                'intOrIdentifier',
                'duration'
            ]
        },

        operands: [],

        /**
         * @returns {?ProcessingValue} a single boolean
         */
        process: function () {
            var result = {};
            var op1, op2;

            //if at least one operand is null, then break and return null
            if (_.some(this.operands, _.isNull) === true) {
                return null;
            }
            if (Object.keys(_.countBy(this.operands, 'baseType')).length !== 1) {
                errorHandler.throw('scoring', new Error('operands must be of the same baseType'));
                return null;
            }

            if (
                this.operands[0].cardinality !== 'single' ||
                !['multiple', 'ordered'].includes(this.operands[1].cardinality)
            ) {
                errorHandler.throw('scoring', new Error('operands must be of the specific cardinality'));
                return null;
            }

            op1 = this.preProcessor.parseVariable(this.operands[0]);
            op2 = this.preProcessor.parseVariable(this.operands[1]);

            result.value = _.reject(op2.value, function (e) {
                return op1.value === e;
            });

            result.baseType = op1.baseType;
            result.cardinality = op2.cardinality;

            return result;
        }
    };

    return deleteProcessor;

});