@oat-sa/tao-item-runner-qti
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TAO QTI Item Runner modules
86 lines (71 loc) • 2.83 kB
JavaScript
/*
* 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);
*
*/
/**
* The member operator processor.
* @see http://www.imsglobal.org/question/qtiv2p1/imsqti_infov2p1.html#element10626
*
* @author Bertrand Chevrier <bertrand@taotesting.com>
*/
import _ from 'lodash';
import errorHandler from 'taoQtiItem/scoring/processor/errorHandler';
/**
* Process operands and returns member result.
* @type {OperatorProcessor}
* @exports taoQtiItem/scoring/processor/expressions/operators/member
*/
var memberProcessor = {
constraints: {
minOperand: 2,
maxOperand: 2,
cardinality: ['multiple', 'ordered', 'single'],
baseType: ['identifier', 'boolean', 'integer', 'string', 'point', 'pair', 'directedPair', 'file', 'uri', 'intOrIdentifier']
},
operands: [],
/**
* @returns {?ProcessingValue} a single boolean
*/
process: function() {
var result = {
cardinality: 'single',
baseType: 'boolean'
};
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'].indexOf(this.operands[1].cardinality) === -1) {
errorHandler.throw('scoring', new Error('operands must be single and multiply|ordered cardinality respectively'));
return null;
}
op1 = this.preProcessor.parseVariable(this.operands[0]).value;
op2 = this.preProcessor.parseVariable(this.operands[1]).value;
if (_.isArray(op1)) {
result.value = _.flatten(op2).join().indexOf(op1) !== -1;
} else {
result.value = op2.indexOf(op1) !== -1;
}
return result;
}
};
export default memberProcessor;