/**
* Processes the answer element (question answers). Common for various qtypes.
* It handles both creation (if the question is being created) and mapping
* (if the question already existed and is being reused)
*/
public function process_question_answer($data)
{
global $DB;
$data = (object) $data;
$oldid = $data->id;
// Detect if the question is created or mapped
$oldquestionid = $this->get_old_parentid('question');
$newquestionid = $this->get_new_parentid('question');
$questioncreated = $this->get_mappingid('question_created', $oldquestionid) ? true : false;
// If the question has been created by restore, we need to create its question_answers too
if ($questioncreated) {
// Adjust some columns
$data->question = $newquestionid;
$data->answer = $data->answertext;
// Insert record
$newitemid = $DB->insert_record('question_answers', $data);
// The question existed, we need to map the existing question_answers
} else {
// Look in question_answers by answertext matching
$sql = 'SELECT id
FROM {question_answers}
WHERE question = ?
AND ' . $DB->sql_compare_text('answer', 255) . ' = ' . $DB->sql_compare_text('?', 255);
$params = array($newquestionid, $data->answertext);
$newitemid = $DB->get_field_sql($sql, $params);
// If we haven't found the newitemid, something has gone really wrong, question in DB
// is missing answers, exception
if (!$newitemid) {
$info = new stdClass();
$info->filequestionid = $oldquestionid;
$info->dbquestionid = $newquestionid;
$info->answer = $data->answertext;
throw restore_step_exception('error_question_answers_missing_in_db', $info);
}
}
// Create mapping (we'll use this intensively when restoring question_states. And also answerfeedback files)
$this->set_mapping('question_answer', $oldid, $newitemid);
}
/**
* Process the qtype/matches/match element
*/
public function process_match($data)
{
global $DB;
$data = (object) $data;
$oldid = $data->id;
// Detect if the question is created or mapped
$oldquestionid = $this->get_old_parentid('question');
$newquestionid = $this->get_new_parentid('question');
$questioncreated = $this->get_mappingid('question_created', $oldquestionid) ? true : false;
// If the question has been created by restore, we need to create its question_match_sub too
if ($questioncreated) {
// Adjust some columns
$data->question = $newquestionid;
// Insert record
$newitemid = $DB->insert_record('question_match_sub', $data);
// Create mapping (there are files and states based on this)
$this->set_mapping('question_match_sub', $oldid, $newitemid);
// match questions require mapping of question_match_sub, because
// they are used by question_states->answer
} else {
// Look for matching subquestion (by question, questiontext and answertext)
$sub = $DB->get_record_select('question_match_sub', 'question = ? AND ' . $DB->sql_compare_text('questiontext') . ' = ' . $DB->sql_compare_text('?') . ' AND answertext = ?', array($newquestionid, $data->questiontext, $data->answertext), 'id', IGNORE_MULTIPLE);
// Found, let's create the mapping
if ($sub) {
$this->set_mapping('question_match_sub', $oldid, $sub->id);
// Something went really wrong, cannot map subquestion for one match question
} else {
throw restore_step_exception('error_question_match_sub_missing_in_db', $data);
}
}
}