@oat-sa/tao-test-runner-qti/src/branchRule/types/not.js

TAO Test Runner QTI implementation

/**
 * 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) 2019 (original work) Open Assessment Technologies SA ;
 */
/**
 * @author Péter Halász <peter@taotesting.com>
 */
import _ from 'lodash';

/**
 * NOT branching rule
 *
 * @param {Object} branchRuleDefinition       the definition object of the branch rule, which contains additional branching rules, and also the target
 * @param {Object} item                       item object from the itemStore
 * @param {Object} navigationParams           object of navigation parameters which got passed to the navigation action
 * @param {branchRuleMapper} branchRuleMapper
 * @param {responseStore} responseStore
 */
export default function notBranchRuleFactory(
    branchRuleDefinition,
    item,
    navigationParams,
    branchRuleMapper,
    responseStore
) {
    // If the NOT branching rule has only one child, cast it as an array
    if (!Array.isArray(branchRuleDefinition)) {
        branchRuleDefinition = [branchRuleDefinition];
    }

    return {
        /**
         * Evaluates a NOT expression on the given expressions and returns an array of results
         * @returns {Promise<boolean[]>}
         */
        validate: function validate() {
            var promises = branchRuleDefinition.map(function(expression) {
                var subBranchRuleName = _.head(_.keys(expression)),
                    subBranchRuleDefinition = expression[subBranchRuleName];

                return branchRuleMapper(
                    subBranchRuleName,
                    subBranchRuleDefinition,
                    item,
                    navigationParams,
                    responseStore
                ).validate();
            });

            return Promise.all(promises).then(function(results) {
                return _.map(results, function(result) {
                    return !result;
                });
            });
        }
    };
}