2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
19 * @subpackage backup-moodle2
20 * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
21 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 defined('MOODLE_INTERNAL') || die();
27 require_once($CFG->dirroot . '/question/type/multianswer/questiontype.php');
29 * restore plugin class that provides the necessary information
30 * needed to restore one multianswer qtype plugin
32 * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
35 class restore_qtype_multianswer_plugin extends restore_qtype_plugin {
38 * Returns the paths to be handled by the plugin at question level
40 protected function define_question_plugin_structure() {
43 // This qtype uses question_answers, add them.
44 $this->add_question_question_answers($paths);
46 // Add own qtype stuff.
47 $elename = 'multianswer';
48 $elepath = $this->get_pathfor('/multianswer');
49 $paths[] = new restore_path_element($elename, $elepath);
51 return $paths; // And we return the interesting paths.
55 * Process the qtype/multianswer element
57 public function process_multianswer($data) {
60 $data = (object)$data;
63 // Detect if the question is created or mapped.
64 $oldquestionid = $this->get_old_parentid('question');
65 $newquestionid = $this->get_new_parentid('question');
66 $questioncreated = $this->get_mappingid('question_created', $oldquestionid) ? true : false;
68 // If the question has been created by restore, we need to create its
69 // question_multianswer too.
70 if ($questioncreated) {
71 // Adjust some columns.
72 $data->question = $newquestionid;
73 // Note: multianswer->sequence is a list of question->id values. We aren't
74 // recoding them here (because some questions can be missing yet). Instead
75 // we'll perform the recode in the {@link after_execute} method of the plugin
76 // that gets executed once all questions have been created.
78 $newitemid = $DB->insert_record('question_multianswer', $data);
79 // Create mapping (need it for after_execute recode of sequence).
80 $this->set_mapping('question_multianswer', $oldid, $newitemid);
85 * This method is executed once the whole restore_structure_step
86 * this step is part of ({@link restore_create_categories_and_questions})
87 * has ended processing the whole xml structure. Its name is:
88 * "after_execute_" + connectionpoint ("question")
90 * For multianswer qtype we use it to restore the sequence column,
91 * containing one list of question ids
93 public function after_execute_question() {
95 // Now that all the questions have been restored, let's process
96 // the created question_multianswer sequences (list of question ids).
97 $rs = $DB->get_recordset_sql("
98 SELECT qma.id, qma.sequence
99 FROM {question_multianswer} qma
100 JOIN {backup_ids_temp} bi ON bi.newitemid = qma.question
101 WHERE bi.backupid = ?
102 AND bi.itemname = 'question_created'",
103 array($this->get_restoreid()));
104 foreach ($rs as $rec) {
105 $sequencearr = preg_split('/,/', $rec->sequence, -1, PREG_SPLIT_NO_EMPTY);
106 if (substr_count($rec->sequence, ',') + 1 != count($sequencearr)) {
107 $this->task->log('Invalid sequence found in restored multianswer question ' . $rec->id, backup::LOG_WARNING);
110 foreach ($sequencearr as $key => $question) {
111 $sequencearr[$key] = $this->get_mappingid('question', $question);
113 $sequence = implode(',', $sequencearr);
114 $DB->set_field('question_multianswer', 'sequence', $sequence,
115 array('id' => $rec->id));
116 if (!empty($sequence)) {
117 // Get relevant data indexed by positionkey from the multianswers table.
118 $wrappedquestions = $DB->get_records_list('question', 'id',
119 explode(',', $sequence), 'id ASC');
120 foreach ($wrappedquestions as $wrapped) {
121 if ($wrapped->qtype == 'multichoice') {
122 question_bank::get_qtype($wrapped->qtype)->get_question_options($wrapped);
123 if (isset($wrapped->options->shuffleanswers)) {
124 preg_match('/'.ANSWER_REGEX.'/s', $wrapped->questiontext, $answerregs);
125 if (isset($answerregs[ANSWER_REGEX_ANSWER_TYPE_MULTICHOICE]) &&
126 $answerregs[ANSWER_REGEX_ANSWER_TYPE_MULTICHOICE] !== '') {
127 $wrapped->options->shuffleanswers = 0;
128 $DB->set_field_select('qtype_multichoice_options', 'shuffleanswers', '0', "id =:select",
129 array('select' => $wrapped->options->id) );
139 public function recode_response($questionid, $sequencenumber, array $response) {
142 $qtypes = $DB->get_records_menu('question', array('parent' => $questionid),
145 $sequence = $DB->get_field('question_multianswer', 'sequence',
146 array('question' => $questionid));
148 $fakestep = new question_attempt_step_read_only($response);
150 foreach (explode(',', $sequence) as $key => $subqid) {
153 $substep = new question_attempt_step_subquestion_adapter($fakestep, 'sub' . $i . '_');
154 $recodedresponse = $this->step->questions_recode_response_data($qtypes[$subqid],
155 $subqid, $sequencenumber, $substep->get_all_data());
157 foreach ($recodedresponse as $name => $value) {
158 $response[$substep->add_prefix($name)] = $value;
166 * Given one question_states record, return the answer
167 * recoded pointing to all the restored stuff for multianswer questions
169 * answer is one comma separated list of hypen separated pairs
170 * containing sequence (pointing to questions sequence in question_multianswer)
171 * and mixed answers. We'll delegate
172 * the recoding of answers to the proper qtype
174 public function recode_legacy_state_answer($state) {
176 $answer = $state->answer;
177 $resultarr = array();
178 // Get sequence of questions.
179 $sequence = $DB->get_field('question_multianswer', 'sequence',
180 array('question' => $state->question));
181 $sequencearr = explode(',', $sequence);
182 // Let's process each pair.
183 foreach (explode(',', $answer) as $pair) {
184 $pairarr = explode('-', $pair);
185 $sequenceid = $pairarr[0];
186 $subanswer = $pairarr[1];
187 // Calculate the questionid based on sequenceid.
188 // Note it is already one *new* questionid that doesn't need mapping.
189 $questionid = $sequencearr[$sequenceid - 1];
190 // Fetch qtype of the question (needed for delegation).
191 $questionqtype = $DB->get_field('question', 'qtype', array('id' => $questionid));
192 // Delegate subanswer recode to proper qtype, faking one question_states record.
193 $substate = new stdClass();
194 $substate->question = $questionid;
195 $substate->answer = $subanswer;
196 $newanswer = $this->step->restore_recode_legacy_answer($substate, $questionqtype);
197 $resultarr[] = implode('-', array($sequenceid, $newanswer));
199 return implode(',', $resultarr);