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           efrain | 
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           <?php
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           // This file is part of Moodle - http://moodle.org/
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           //
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           // Moodle is free software: you can redistribute it and/or modify
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           // it under the terms of the GNU General Public License as published by
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           // the Free Software Foundation, either version 3 of the License, or
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           // (at your option) any later version.
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           //
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           // Moodle is distributed in the hope that it will be useful,
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           // but WITHOUT ANY WARRANTY; without even the implied warranty of
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           // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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           // GNU General Public License for more details.
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           //
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           // You should have received a copy of the GNU General Public License
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           // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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           /**
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            * @package    qtype
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            * @subpackage calculated
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            * @copyright  2011 David Mudrak <david@moodle.com>
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            * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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            */
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           defined('MOODLE_INTERNAL') || die();
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           /**
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            * Calculated question type conversion handler
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            */
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           class moodle1_qtype_calculated_handler extends moodle1_qtype_handler {
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               /**
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                * @return array
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                */
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               public function get_question_subpaths() {
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                   return array(
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                       'ANSWERS/ANSWER',
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                       'CALCULATED',
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                       'CALCULATED/NUMERICAL_UNITS/NUMERICAL_UNIT',
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                       'CALCULATED/DATASET_DEFINITIONS/DATASET_DEFINITION',
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                       'CALCULATED/DATASET_DEFINITIONS/DATASET_DEFINITION/DATASET_ITEMS/DATASET_ITEM'
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                   );
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               }
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               /**
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                * Appends the calculated specific information to the question
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                */
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               public function process_question(array $data, array $raw) {
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                   // Convert and write the answers first.
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                   if (isset($data['answers'])) {
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                       $this->write_answers($data['answers'], $this->pluginname);
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                   }
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                   // Convert and write the numerical units and numerical options.
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                   if (isset($data['calculated'][0]['numerical_units'])) {
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                       $numericalunits = $data['calculated'][0]['numerical_units'];
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                   } else {
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                       $numericalunits = array();
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                   }
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                   $numericaloptions = $this->get_default_numerical_options(
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                           $data['oldquestiontextformat'], $numericalunits);
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                   $this->write_numerical_units($numericalunits);
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                   $this->write_numerical_options($numericaloptions);
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                   // Write dataset_definitions.
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                   if (isset($data['calculated'][0]['dataset_definitions']['dataset_definition'])) {
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                       $datasetdefinitions = $data['calculated'][0]['dataset_definitions']['dataset_definition'];
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                   } else {
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                       $datasetdefinitions = array();
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                   }
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                   $this->write_dataset_definitions($datasetdefinitions);
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                   // Write calculated_records.
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                   $this->xmlwriter->begin_tag('calculated_records');
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                   foreach ($data['calculated'] as $calculatedrecord) {
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                       $record = array(
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                           'id'                  => $this->converter->get_nextid(),
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                           'answer'              => $calculatedrecord['answer'],
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                           'tolerance'           => $calculatedrecord['tolerance'],
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                           'tolerancetype'       => $calculatedrecord['tolerancetype'],
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                           'correctanswerlength' => $calculatedrecord['correctanswerlength'],
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                           'correctanswerformat' => $calculatedrecord['correctanswerformat']
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                       );
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                       $this->write_xml('calculated_record', $record, array('/calculated_record/id'));
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                   }
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                   $this->xmlwriter->end_tag('calculated_records');
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                   // Write calculated_options.
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                   $options = array(
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                       'calculate_option' => array(
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                           'id'                             => $this->converter->get_nextid(),
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                           'synchronize'                    => 0,
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                           'single'                         => 0,
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                           'shuffleanswers'                 => 0,
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                           'correctfeedback'                => null,
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                           'correctfeedbackformat'          => FORMAT_HTML,
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                           'partiallycorrectfeedback'       => null,
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                           'partiallycorrectfeedbackformat' => FORMAT_HTML,
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                           'incorrectfeedback'              => null,
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                           'incorrectfeedbackformat'        => FORMAT_HTML,
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                           'answernumbering'                => 'abc'
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                       )
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                   );
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                   $this->write_xml('calculated_options', $options, array('/calculated_options/calculate_option/id'));
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               }
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           }
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