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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Functions used by some stages of number of errors grading upgrade
*
* @package workshopform
* @subpackage numerrors
* @copyright 2010 David Mudrak <david.mudrak@gmail.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once($CFG->libdir.'/gradelib.php'); // grade_floatval() called here
/**
* Check if there are some legacy workshop 1.x data to be migrated and upgrade them
*
* This must be called after workshop core migration has finished so that
* all assessments are already upgraded and tables are correctly renamed.
*/
function workshopform_numerrors_upgrade_legacy() {
global $CFG, $DB, $OUTPUT;
require_once($CFG->dirroot . '/mod/workshop/db/upgradelib.php');
if (!workshopform_numerrors_upgrade_legacy_needed()) {
return;
}
// get the list of all legacy workshops using this grading strategy
if ($legacyworkshops = $DB->get_records('workshop_old', array('gradingstrategy' => 2), 'course,id', 'id')) {
echo $OUTPUT->notification('Copying assessment forms elements and grade mappings', 'notifysuccess');
$legacyworkshops = array_keys($legacyworkshops);
// get some needed info about the workshops
$workshopinfos = $DB->get_records_list('workshop_old', 'id', $legacyworkshops, 'id', 'id,grade');
// get the list of all form elements
list($workshopids, $params) = $DB->get_in_or_equal($legacyworkshops, SQL_PARAMS_NAMED);
$sql = "SELECT *
FROM {workshop_elements_old}
WHERE workshopid $workshopids
AND newid IS NULL";
$rs = $DB->get_recordset_sql($sql, $params);
foreach ($rs as $old) {
// process the information about mapping
$newmapping = new stdclass();
$newmapping->workshopid = $old->workshopid;
$newmapping->nonegative = $old->elementno;
$newmapping->grade = $old->maxscore;
if ($old->maxscore > 0) {
$newmapping->grade = grade_floatval($old->maxscore / $workshopinfos[$old->workshopid]->grade * 100);
} else {
$newmapping->grade = 0;
}
$DB->delete_records('workshopform_numerrors_map',
array('workshopid' => $newmapping->workshopid, 'nonegative' => $newmapping->nonegative));
$DB->insert_record('workshopform_numerrors_map', $newmapping);
// process the information about the element itself
if (trim($old->description) and $old->description <> '@@ GRADE_MAPPING_ELEMENT @@') {
$new = workshopform_numerrors_upgrade_element($old, $old->workshopid);
$newid = $DB->insert_record('workshopform_numerrors', $new);
} else {
$newid = 0;
}
$DB->set_field('workshop_elements_old', 'newplugin', 'numerrors', array('id' => $old->id));
$DB->set_field('workshop_elements_old', 'newid', $newid, array('id' => $old->id));
}
$rs->close();
// now we need to reload the legacy ids. Although we have them in $newelements after the first run, we must
// refetch them from DB so that this function can be called during recovery
$newelementids = workshop_upgrade_element_id_mappings('numerrors');
// migrate all grades for these elements (it est the values that reviewers put into forms)
echo $OUTPUT->notification('Copying assessment form grades', 'notifysuccess');
$sql = "SELECT *
FROM {workshop_grades_old}
WHERE workshopid $workshopids
AND newid IS NULL";
$rs = $DB->get_recordset_sql($sql, $params);
$newassessmentids = workshop_upgrade_assessment_id_mappings();
foreach ($rs as $old) {
if (!isset($newassessmentids[$old->assessmentid])) {
// orphaned grade - the assessment was removed but the grade remained
continue;
}
if (!isset($newelementids[$old->workshopid]) or !isset($newelementids[$old->workshopid][$old->elementno])) {
// orphaned grade - the assessment form element has been removed after the grade was recorded
continue;
}
$newelementinfo = $newelementids[$old->workshopid][$old->elementno];
if ($newelementinfo->newid == 0 or $old->feedback == '@@ GRADE_ADJUSTMENT @@') {
// this is not a real grade - it was used just for mapping purposes
$DB->set_field('workshop_grades_old', 'newplugin', 'numerrors_map', array('id' => $old->id));
$DB->set_field('workshop_grades_old', 'newid', 0, array('id' => $old->id));
continue;
}
$new = workshopform_numerrors_upgrade_grade($old, $newassessmentids[$old->assessmentid],
$newelementids[$old->workshopid][$old->elementno]);
$newid = $DB->insert_record('workshop_grades', $new);
$DB->set_field('workshop_grades_old', 'newplugin', 'numerrors', array('id' => $old->id));
$DB->set_field('workshop_grades_old', 'newid', $newid, array('id' => $old->id));
}
$rs->close();
}
}
/**
* Transforms a given record from workshop_elements_old into an object to be saved into workshopform_numerrors
*
* @param stdClass $old legacy record from workshop_elements_old
* @param int $newworkshopid id of the new workshop instance that replaced the previous one
* @return stdclass to be saved in workshopform_numerrors
*/
function workshopform_numerrors_upgrade_element(stdclass $old, $newworkshopid) {
$new = new stdclass();
$new->workshopid = $newworkshopid;
$new->sort = $old->elementno;
$new->description = $old->description;
$new->descriptionformat = FORMAT_HTML;
$new->grade0 = get_string('grade0default', 'workshopform_numerrors');
$new->grade1 = get_string('grade1default', 'workshopform_numerrors');
// calculate new weight of the element. Negative weights are not supported any more and
// are replaced with weight = 0. Legacy workshop did not store the raw weight but the index
// in the array of weights (see $WORKSHOP_EWEIGHTS in workshop 1.x)
// workshop 2.0 uses integer weights only (0-16) so all previous weights are multiplied by 4.
switch ($old->weight) {
case 8: $new->weight = 1; break;
case 9: $new->weight = 2; break;
case 10: $new->weight = 3; break;
case 11: $new->weight = 4; break;
case 12: $new->weight = 6; break;
case 13: $new->weight = 8; break;
case 14: $new->weight = 16; break;
default: $new->weight = 0;
}
return $new;
}
/**
* Transforms given grade record
*
* @param stdClass $old
* @param int $newassessmentid
* @param stdClass $newdimensioninfo
* @return stdclass
*/
function workshopform_numerrors_upgrade_grade(stdclass $old, $newassessmentid, stdclass $newdimensioninfo) {
$new = new stdclass();
$new->assessmentid = $newassessmentid;
$new->strategy = 'numerrors';
$new->dimensionid = $newdimensioninfo->newid;
$new->grade = $old->grade;
$new->peercomment = $old->feedback;
$new->peercommentformat = FORMAT_HTML;
return $new;
}
/**
* Check if the the migration from legacy workshop 1.9 is needed
*
* @return bool
*/
function workshopform_numerrors_upgrade_legacy_needed() {
global $CFG, $DB;
$dbman = $DB->get_manager();
if (!($dbman->table_exists('workshop_elements_old') and $dbman->table_exists('workshop_grades_old'))) {
return false;
}
return true;
}
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