@oat-sa/tao-item-runner-qti/src/scoring/processor/errorHandler.js

TAO QTI Item Runner modules

/*
 * 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);
 *
 */

/**
 *
 * @author Bertrand Chevrier <bertrand@taotesting.com>
 */
import _ from 'lodash';

//TODO comment out and raise to tao-core

var errorHandlerContext = function() {

    var typedHandlers = {};
    var globalHandler;

    return {
        'listen': function listenError(type, handler) {
            if (_.isFunction(type) && !handler) {
                handler = type;
            }
            if (_.isFunction(handler)) {
                if (_.isString(type) && !_.isEmpty(type)) {
                    typedHandlers[type] = handler;
                } else {
                    globalHandler = handler;
                }
            }
        },
        'throw': function throwError(err) {
            if (_.isString(err)) {
                err = new Error(err);
            }
            if (_.isFunction(typedHandlers[err.name])) {
                typedHandlers[err.name](err);
            }
            if (_.isFunction(globalHandler)) {
                globalHandler(err);
            }
            return false;
        }
    };
};

var errorHandler = {
    _contexts: {},

    getContext: function getErrorContext(name) {
        if (_.isString(name) && name.length) {
            this._contexts[name] = this._contexts[name] || errorHandlerContext();
            return this._contexts[name];
        }
    },

    'listen': function listenInContext(name, ...args) {
        var context = this.getContext(name);
        if (context) {
            context.listen(...args);
        }
    },

    'throw': function throwInContext(name, err) {
        var context = this.getContext(name);
        if (context) {
            return context.throw(err);
        }
    },

    reset: function resetContext(name) {
        if (this._contexts[name]) {
            this._contexts = _.omit(this._contexts, name);
        }
    }
};
export default errorHandler;