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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/>.
/**
* A moodleform allowing the editing of the grade options for an individual grade item
*
* @package core_grades
* @copyright 2007 Petr Skoda
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
if (!defined('MOODLE_INTERNAL')) {
die('Direct access to this script is forbidden.'); /// It must be included from a Moodle page
}
require_once $CFG->libdir.'/formslib.php';
class edit_item_form extends moodleform {
private $displayoptions;
function definition() {
global $COURSE, $CFG, $DB;
$mform =& $this->_form;
$item = $this->_customdata['current'];
/// visible elements
$mform->addElement('header', 'general', get_string('gradeitem', 'grades'));
$mform->addElement('text', 'itemname', get_string('itemname', 'grades'));
$mform->setType('itemname', PARAM_TEXT);
$mform->addElement('text', 'iteminfo', get_string('iteminfo', 'grades'));
$mform->addHelpButton('iteminfo', 'iteminfo', 'grades');
$mform->setType('iteminfo', PARAM_TEXT);
$mform->addElement('text', 'idnumber', get_string('idnumbermod'));
$mform->addHelpButton('idnumber', 'idnumbermod');
$mform->setType('idnumber', PARAM_RAW);
if (!empty($item->id)) {
$gradeitem = new grade_item(array('id' => $item->id, 'courseid' => $item->courseid));
// If grades exist set a message so the user knows why they can not alter the grade type or scale.
// We could never change the grade type for external items, so only need to show this for manual grade items.
if ($gradeitem->has_grades() && !$gradeitem->is_external_item()) {
// Set a message so the user knows why they can not alter the grade type or scale.
if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
$gradesexistmsg = get_string('modgradecantchangegradetyporscalemsg', 'grades');
} else {
$gradesexistmsg = get_string('modgradecantchangegradetypemsg', 'grades');
}
$gradesexisthtml = '<div class=\'alert\'>' . $gradesexistmsg . '</div>';
$mform->addElement('static', 'gradesexistmsg', '', $gradesexisthtml);
}
}
// Manual grade items cannot have grade type GRADE_TYPE_NONE.
$options = array(GRADE_TYPE_VALUE => get_string('typevalue', 'grades'),
GRADE_TYPE_SCALE => get_string('typescale', 'grades'),
GRADE_TYPE_TEXT => get_string('typetext', 'grades'));
$mform->addElement('select', 'gradetype', get_string('gradetype', 'grades'), $options);
$mform->addHelpButton('gradetype', 'gradetype', 'grades');
$mform->setDefault('gradetype', GRADE_TYPE_VALUE);
//$mform->addElement('text', 'calculation', get_string('calculation', 'grades'));
//$mform->disabledIf('calculation', 'gradetype', 'eq', GRADE_TYPE_TEXT);
//$mform->disabledIf('calculation', 'gradetype', 'eq', GRADE_TYPE_NONE);
$options = array(0=>get_string('usenoscale', 'grades'));
if ($scales = grade_scale::fetch_all_local($COURSE->id)) {
foreach ($scales as $scale) {
$options[$scale->id] = $scale->get_name();
}
}
if ($scales = grade_scale::fetch_all_global()) {
foreach ($scales as $scale) {
$options[$scale->id] = $scale->get_name();
}
}
// ugly BC hack - it was possible to use custom scale from other courses :-(
if (!empty($item->scaleid) and !isset($options[$item->scaleid])) {
if ($scale = grade_scale::fetch(array('id'=>$item->scaleid))) {
$options[$scale->id] = $scale->get_name().get_string('incorrectcustomscale', 'grades');
}
}
$mform->addElement('select', 'scaleid', get_string('scale'), $options);
$mform->addHelpButton('scaleid', 'typescale', 'grades');
$mform->disabledIf('scaleid', 'gradetype', 'noteq', GRADE_TYPE_SCALE);
$choices = array();
$choices[''] = get_string('choose');
$choices['no'] = get_string('no');
$choices['yes'] = get_string('yes');
$mform->addElement('select', 'rescalegrades', get_string('modgraderescalegrades', 'grades'), $choices);
$mform->addHelpButton('rescalegrades', 'modgraderescalegrades', 'grades');
$mform->disabledIf('rescalegrades', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
$mform->addElement('text', 'grademax', get_string('grademax', 'grades'));
$mform->addHelpButton('grademax', 'grademax', 'grades');
$mform->disabledIf('grademax', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
$mform->setType('grademax', PARAM_RAW);
if ((bool) get_config('moodle', 'grade_report_showmin')) {
$mform->addElement('text', 'grademin', get_string('grademin', 'grades'));
$mform->addHelpButton('grademin', 'grademin', 'grades');
$mform->disabledIf('grademin', 'gradetype', 'noteq', GRADE_TYPE_VALUE);
$mform->setType('grademin', PARAM_RAW);
}
$mform->addElement('text', 'gradepass', get_string('gradepass', 'grades'));
$mform->addHelpButton('gradepass', 'gradepass', 'grades');
$mform->disabledIf('gradepass', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('gradepass', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$mform->setType('gradepass', PARAM_RAW);
$mform->addElement('text', 'multfactor', get_string('multfactor', 'grades'));
$mform->addHelpButton('multfactor', 'multfactor', 'grades');
$mform->setAdvanced('multfactor');
$mform->disabledIf('multfactor', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('multfactor', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$mform->setType('multfactor', PARAM_RAW);
$mform->addElement('text', 'plusfactor', get_string('plusfactor', 'grades'));
$mform->addHelpButton('plusfactor', 'plusfactor', 'grades');
$mform->setAdvanced('plusfactor');
$mform->disabledIf('plusfactor', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('plusfactor', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$mform->setType('plusfactor', PARAM_RAW);
/// grade display prefs
$default_gradedisplaytype = grade_get_setting($COURSE->id, 'displaytype', $CFG->grade_displaytype);
$options = array(GRADE_DISPLAY_TYPE_DEFAULT => get_string('default', 'grades'),
GRADE_DISPLAY_TYPE_REAL => get_string('real', 'grades'),
GRADE_DISPLAY_TYPE_PERCENTAGE => get_string('percentage', 'grades'),
GRADE_DISPLAY_TYPE_LETTER => get_string('letter', 'grades'),
GRADE_DISPLAY_TYPE_REAL_PERCENTAGE => get_string('realpercentage', 'grades'),
GRADE_DISPLAY_TYPE_REAL_LETTER => get_string('realletter', 'grades'),
GRADE_DISPLAY_TYPE_LETTER_REAL => get_string('letterreal', 'grades'),
GRADE_DISPLAY_TYPE_LETTER_PERCENTAGE => get_string('letterpercentage', 'grades'),
GRADE_DISPLAY_TYPE_PERCENTAGE_LETTER => get_string('percentageletter', 'grades'),
GRADE_DISPLAY_TYPE_PERCENTAGE_REAL => get_string('percentagereal', 'grades')
);
asort($options);
foreach ($options as $key=>$option) {
if ($key == $default_gradedisplaytype) {
$options[GRADE_DISPLAY_TYPE_DEFAULT] = get_string('defaultprev', 'grades', $option);
break;
}
}
$mform->addElement('select', 'display', get_string('gradedisplaytype', 'grades'), $options);
$mform->addHelpButton('display', 'gradedisplaytype', 'grades');
$mform->disabledIf('display', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$default_gradedecimals = grade_get_setting($COURSE->id, 'decimalpoints', $CFG->grade_decimalpoints);
$options = array(-1=>get_string('defaultprev', 'grades', $default_gradedecimals), 0=>0, 1=>1, 2=>2, 3=>3, 4=>4, 5=>5);
$mform->addElement('select', 'decimals', get_string('decimalpoints', 'grades'), $options);
$mform->addHelpButton('decimals', 'decimalpoints', 'grades');
$mform->setDefault('decimals', -1);
$mform->disabledIf('decimals', 'display', 'eq', GRADE_DISPLAY_TYPE_LETTER);
if ($default_gradedisplaytype == GRADE_DISPLAY_TYPE_LETTER) {
$mform->disabledIf('decimals', 'display', "eq", GRADE_DISPLAY_TYPE_DEFAULT);
}
$mform->disabledIf('decimals', 'gradetype', 'eq', GRADE_TYPE_TEXT);
/// hiding
if ($item->cancontrolvisibility) {
// advcheckbox is not compatible with disabledIf!
$mform->addElement('checkbox', 'hidden', get_string('hidden', 'grades'));
$mform->addElement('date_time_selector', 'hiddenuntil', get_string('hiddenuntil', 'grades'), array('optional'=>true));
$mform->disabledIf('hidden', 'hiddenuntil[off]', 'notchecked');
} else {
$mform->addElement('static', 'hidden', get_string('hidden', 'grades'),
get_string('componentcontrolsvisibility', 'grades'));
// Unset hidden to avoid data override.
unset($item->hidden);
}
$mform->addHelpButton('hidden', 'hidden', 'grades');
/// locking
$mform->addElement('advcheckbox', 'locked', get_string('locked', 'grades'));
$mform->addHelpButton('locked', 'locked', 'grades');
$mform->addElement('date_time_selector', 'locktime', get_string('locktime', 'grades'), array('optional'=>true));
$mform->disabledIf('locktime', 'gradetype', 'eq', GRADE_TYPE_NONE);
/// parent category related settings
$mform->addElement('header', 'headerparent', get_string('parentcategory', 'grades'));
$mform->addElement('advcheckbox', 'weightoverride', get_string('adjustedweight', 'grades'));
$mform->addHelpButton('weightoverride', 'weightoverride', 'grades');
$mform->disabledIf('weightoverride', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('weightoverride', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$mform->addElement('text', 'aggregationcoef2', get_string('weight', 'grades'));
$mform->addHelpButton('aggregationcoef2', 'weight', 'grades');
$mform->setType('aggregationcoef2', PARAM_RAW);
$mform->disabledIf('aggregationcoef2', 'weightoverride');
$mform->disabledIf('aggregationcoef2', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('aggregationcoef2', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$options = array();
$coefstring = '';
$categories = grade_category::fetch_all(array('courseid'=>$COURSE->id));
foreach ($categories as $cat) {
$cat->apply_forced_settings();
$options[$cat->id] = $cat->get_name();
}
if (count($categories) > 1) {
$mform->addElement('select', 'parentcategory', get_string('gradecategory', 'grades'), $options);
}
/// hidden params
$mform->addElement('hidden', 'id', 0);
$mform->setType('id', PARAM_INT);
$mform->addElement('hidden', 'courseid', $COURSE->id);
$mform->setType('courseid', PARAM_INT);
$mform->addElement('hidden', 'itemtype', 'manual'); // all new items are manual only
$mform->setType('itemtype', PARAM_ALPHA);
/// add return tracking info
$gpr = $this->_customdata['gpr'];
$gpr->add_mform_elements($mform);
/// mark advanced according to site settings
if (isset($CFG->grade_item_advanced)) {
$advanced = explode(',', $CFG->grade_item_advanced);
foreach ($advanced as $el) {
if ($mform->elementExists($el)) {
$mform->setAdvanced($el);
}
}
}
//-------------------------------------------------------------------------------
// buttons
$this->add_action_buttons();
//-------------------------------------------------------------------------------
$this->set_data($item);
}
/// tweak the form - depending on existing data
function definition_after_data() {
global $CFG, $COURSE;
$mform =& $this->_form;
if ($id = $mform->getElementValue('id')) {
$gradeitem = grade_item::fetch(array('id' => $id));
$parentcategory = $gradeitem->get_parent_category();
} else {
// If we do not have an id, we are creating a new grade item.
$gradeitem = new grade_item(array('courseid' => $COURSE->id, 'itemtype' => 'manual'), false);
// Assign the course category to this grade item.
$parentcategory = grade_category::fetch_course_category($COURSE->id);
$gradeitem->parent_category = $parentcategory;
}
if (!$gradeitem->is_raw_used()) {
$mform->removeElement('plusfactor');
$mform->removeElement('multfactor');
}
if ($gradeitem->is_outcome_item()) {
// We have to prevent incompatible modifications of outcomes if outcomes disabled.
$mform->removeElement('grademax');
if ($mform->elementExists('grademin')) {
$mform->removeElement('grademin');
}
$mform->removeElement('gradetype');
$mform->removeElement('display');
$mform->removeElement('decimals');
$mform->hardFreeze('scaleid');
} else {
if ($gradeitem->is_external_item()) {
// Following items are set up from modules and should not be overrided by user.
if ($mform->elementExists('grademin')) {
// The site setting grade_report_showmin may have prevented grademin being added to the form.
$mform->hardFreeze('grademin');
}
$mform->hardFreeze('itemname,gradetype,grademax,scaleid');
if ($gradeitem->itemnumber == 0) {
// The idnumber of grade itemnumber 0 is synced with course_modules.
$mform->hardFreeze('idnumber');
}
// For external items we can not change the grade type, even if no grades exist, so if it is set to
// scale, then remove the grademax and grademin fields from the form - no point displaying them.
if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
$mform->removeElement('grademax');
if ($mform->elementExists('grademin')) {
$mform->removeElement('grademin');
}
} else { // Not using scale, so remove it.
$mform->removeElement('scaleid');
}
// Always remove the rescale grades element if it's an external item.
$mform->removeElement('rescalegrades');
} else if ($gradeitem->has_grades()) {
// Can't change the grade type or the scale if there are grades.
$mform->hardFreeze('gradetype, scaleid');
// If we are using scales then remove the unnecessary rescale and grade fields.
if ($gradeitem->gradetype == GRADE_TYPE_SCALE) {
$mform->removeElement('rescalegrades');
$mform->removeElement('grademax');
if ($mform->elementExists('grademin')) {
$mform->removeElement('grademin');
}
} else { // Remove the scale field.
$mform->removeElement('scaleid');
// Set the maximum grade to disabled unless a grade is chosen.
$mform->disabledIf('grademax', 'rescalegrades', 'eq', '');
}
} else {
// Remove the rescale element if there are no grades.
$mform->removeElement('rescalegrades');
}
}
// If we wanted to change parent of existing item - we would have to verify there are no circular references in parents!!!
if ($id && $mform->elementExists('parentcategory')) {
$mform->hardFreeze('parentcategory');
}
$parentcategory->apply_forced_settings();
if (!$parentcategory->is_aggregationcoef_used()) {
if ($mform->elementExists('aggregationcoef')) {
$mform->removeElement('aggregationcoef');
}
} else {
$coefstring = $gradeitem->get_coefstring();
if ($coefstring !== '') {
if ($coefstring == 'aggregationcoefextrasum' || $coefstring == 'aggregationcoefextraweightsum') {
// The advcheckbox is not compatible with disabledIf!
$coefstring = 'aggregationcoefextrasum';
$element =& $mform->createElement('checkbox', 'aggregationcoef', get_string($coefstring, 'grades'));
} else {
$element =& $mform->createElement('text', 'aggregationcoef', get_string($coefstring, 'grades'));
}
if ($mform->elementExists('parentcategory')) {
$mform->insertElementBefore($element, 'parentcategory');
} else {
$mform->insertElementBefore($element, 'id');
}
$mform->addHelpButton('aggregationcoef', $coefstring, 'grades');
}
$mform->disabledIf('aggregationcoef', 'gradetype', 'eq', GRADE_TYPE_NONE);
$mform->disabledIf('aggregationcoef', 'gradetype', 'eq', GRADE_TYPE_TEXT);
$mform->disabledIf('aggregationcoef', 'parentcategory', 'eq', $parentcategory->id);
}
// Remove fields used by natural weighting if the parent category is not using natural weighting.
// Or if the item is a scale and scales are not used in aggregation.
if ($parentcategory->aggregation != GRADE_AGGREGATE_SUM
|| (empty($CFG->grade_includescalesinaggregation) && $gradeitem->gradetype == GRADE_TYPE_SCALE)) {
if ($mform->elementExists('weightoverride')) {
$mform->removeElement('weightoverride');
}
if ($mform->elementExists('aggregationcoef2')) {
$mform->removeElement('aggregationcoef2');
}
}
if ($category = $gradeitem->get_item_category()) {
if ($category->aggregation == GRADE_AGGREGATE_SUM) {
if ($mform->elementExists('gradetype')) {
$mform->hardFreeze('gradetype');
}
if ($mform->elementExists('grademin')) {
$mform->hardFreeze('grademin');
}
if ($mform->elementExists('grademax')) {
$mform->hardFreeze('grademax');
}
if ($mform->elementExists('scaleid')) {
$mform->removeElement('scaleid');
}
}
}
// no parent header for course category
if (!$mform->elementExists('aggregationcoef') and !$mform->elementExists('parentcategory')) {
$mform->removeElement('headerparent');
}
}
/// perform extra validation before submission
function validation($data, $files) {
global $COURSE;
$grade_item = false;
if ($data['id']) {
$grade_item = new grade_item(array('id' => $data['id'], 'courseid' => $data['courseid']));
}
$errors = parent::validation($data, $files);
if (array_key_exists('idnumber', $data)) {
if ($grade_item) {
if ($grade_item->itemtype == 'mod') {
$cm = get_coursemodule_from_instance($grade_item->itemmodule, $grade_item->iteminstance, $grade_item->courseid);
} else {
$cm = null;
}
} else {
$grade_item = null;
$cm = null;
}
if (!grade_verify_idnumber($data['idnumber'], $COURSE->id, $grade_item, $cm)) {
$errors['idnumber'] = get_string('idnumbertaken');
}
}
if (array_key_exists('gradetype', $data) and $data['gradetype'] == GRADE_TYPE_SCALE) {
if (empty($data['scaleid'])) {
$errors['scaleid'] = get_string('missingscale', 'grades');
}
}
if (array_key_exists('grademin', $data) and array_key_exists('grademax', $data)) {
if ($data['grademax'] == $data['grademin'] or $data['grademax'] < $data['grademin']) {
$errors['grademin'] = get_string('incorrectminmax', 'grades');
$errors['grademax'] = get_string('incorrectminmax', 'grades');
}
}
// We do not want the user to be able to change the grade type or scale for this item if grades exist.
if ($grade_item && $grade_item->has_grades()) {
// Check that grade type is set - should never not be set unless form has been modified.
if (!isset($data['gradetype'])) {
$errors['gradetype'] = get_string('modgradecantchangegradetype', 'grades');
} else if ($data['gradetype'] !== $grade_item->gradetype) { // Check if we are changing the grade type.
$errors['gradetype'] = get_string('modgradecantchangegradetype', 'grades');
} else if ($data['gradetype'] == GRADE_TYPE_SCALE) {
// Check if we are changing the scale - can't do this when grades exist.
if (isset($data['scaleid']) && ($data['scaleid'] !== $grade_item->scaleid)) {
$errors['scaleid'] = get_string('modgradecantchangescale', 'grades');
}
}
}
if ($grade_item) {
if ($grade_item->gradetype == GRADE_TYPE_VALUE) {
if ((((bool) get_config('moodle', 'grade_report_showmin')) &&
grade_floats_different($data['grademin'], $grade_item->grademin)) ||
grade_floats_different($data['grademax'], $grade_item->grademax)) {
if ($grade_item->has_grades() && empty($data['rescalegrades'])) {
$errors['rescalegrades'] = get_string('mustchooserescaleyesorno', 'grades');
}
}
}
}
return $errors;
}
}