@oat-sa/tao-item-runner-qti
Version:
TAO QTI Item Runner modules
78 lines (62 loc) • 2.71 kB
JavaScript
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 index result.
* @type {OperatorProcessor}
* @exports taoQtiItem/scoring/processor/expressions/operators/index
*/
var indexProcessor = {
constraints: {
minOperand: 1,
maxOperand: 1,
cardinality: ['ordered'],
baseType: ['identifier', 'boolean', 'integer', 'float', 'string', 'point', 'pair', 'directedPair', 'file', 'uri', 'intOrIdentifier', 'duration']
},
operands: [],
/**
* @returns {?ProcessingValue} a single boolean
*/
process: function() {
var result = {
cardinality: 'single'
};
var op1;
var n = this.preProcessor.parseValue(this.expression.attributes.n, 'integerOrVariableRef');
//if at least one operand is null, then break and return null
if (_.some(this.operands, _.isNull) === true) {
return null;
}
if (n < 1) {
errorHandler.throw('scoring', new Error('n must be greater than 0'));
return null;
}
op1 = this.preProcessor.parseVariable(this.operands[0]);
if (_.isUndefined(op1.value[n - 1])) {
return null;
}
result.value = op1.value[n - 1];
result.baseType = op1.baseType;
return result;
}
};
return indexProcessor;
});