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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/>.
defined('MOODLE_INTERNAL') OR die('not allowed');
require_once($CFG->dirroot.'/mod/feedback/item/feedback_item_class.php');
define('FEEDBACK_MULTICHOICE_TYPE_SEP', '>>>>>');
define('FEEDBACK_MULTICHOICE_LINE_SEP', '|');
define('FEEDBACK_MULTICHOICE_ADJUST_SEP', '<<<<<');
define('FEEDBACK_MULTICHOICE_IGNOREEMPTY', 'i');
define('FEEDBACK_MULTICHOICE_HIDENOSELECT', 'h');
class feedback_item_multichoice extends feedback_item_base {
protected $type = "multichoice";
public function build_editform($item, $feedback, $cm) {
global $DB, $CFG;
require_once('multichoice_form.php');
//get the lastposition number of the feedback_items
$position = $item->position;
$lastposition = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));
if ($position == -1) {
$i_formselect_last = $lastposition + 1;
$i_formselect_value = $lastposition + 1;
$item->position = $lastposition + 1;
} else {
$i_formselect_last = $lastposition;
$i_formselect_value = $item->position;
}
//the elements for position dropdownlist
$positionlist = array_slice(range(0, $i_formselect_last), 1, $i_formselect_last, true);
$item->presentation = empty($item->presentation) ? '' : $item->presentation;
$info = $this->get_info($item);
$item->ignoreempty = $this->ignoreempty($item);
$item->hidenoselect = $this->hidenoselect($item);
//all items for dependitem
$feedbackitems = feedback_get_depend_candidates_for_item($feedback, $item);
$commonparams = array('cmid'=>$cm->id,
'id'=>isset($item->id) ? $item->id : null,
'typ'=>$item->typ,
'items'=>$feedbackitems,
'feedback'=>$feedback->id);
//build the form
$customdata = array('item' => $item,
'common' => $commonparams,
'positionlist' => $positionlist,
'position' => $position,
'info' => $info);
$this->item_form = new feedback_multichoice_form('edit_item.php', $customdata);
}
public function save_item() {
global $DB;
if (!$this->get_data()) {
return false;
}
$item = $this->item;
if (isset($item->clone_item) AND $item->clone_item) {
$item->id = ''; //to clone this item
$item->position++;
}
$this->set_ignoreempty($item, $item->ignoreempty);
$this->set_hidenoselect($item, $item->hidenoselect);
$item->hasvalue = $this->get_hasvalue();
if (!$item->id) {
$item->id = $DB->insert_record('feedback_item', $item);
} else {
$DB->update_record('feedback_item', $item);
}
return $DB->get_record('feedback_item', array('id'=>$item->id));
}
//gets an array with three values(typ, name, XXX)
//XXX is an object with answertext, answercount and quotient
/**
* Helper function for collected data, both for analysis page and export to excel
*
* @param stdClass $item the db-object from feedback_item
* @param int $groupid
* @param int $courseid
* @return array
*/
protected function get_analysed($item, $groupid = false, $courseid = false) {
$info = $this->get_info($item);
$analysed_item = array();
$analysed_item[] = $item->typ;
$analysed_item[] = format_string($item->name);
//get the possible answers
$answers = null;
$answers = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
if (!is_array($answers)) {
return null;
}
//get the values
$values = feedback_get_group_values($item, $groupid, $courseid, $this->ignoreempty($item));
if (!$values) {
return null;
}
//get answertext, answercount and quotient for each answer
$analysed_answer = array();
if ($info->subtype == 'c') {
$sizeofanswers = count($answers);
for ($i = 1; $i <= $sizeofanswers; $i++) {
$ans = new stdClass();
$ans->answertext = $answers[$i-1];
$ans->answercount = 0;
foreach ($values as $value) {
//ist die Antwort gleich dem index der Antworten + 1?
$vallist = explode(FEEDBACK_MULTICHOICE_LINE_SEP, $value->value);
foreach ($vallist as $val) {
if ($val == $i) {
$ans->answercount++;
}
}
}
$ans->quotient = $ans->answercount / count($values);
$analysed_answer[] = $ans;
}
} else {
$sizeofanswers = count($answers);
for ($i = 1; $i <= $sizeofanswers; $i++) {
$ans = new stdClass();
$ans->answertext = $answers[$i-1];
$ans->answercount = 0;
foreach ($values as $value) {
//ist die Antwort gleich dem index der Antworten + 1?
if ($value->value == $i) {
$ans->answercount++;
}
}
$ans->quotient = $ans->answercount / count($values);
$analysed_answer[] = $ans;
}
}
$analysed_item[] = $analysed_answer;
return $analysed_item;
}
public function get_printval($item, $value) {
$info = $this->get_info($item);
$printval = '';
if (!isset($value->value)) {
return $printval;
}
$presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
if ($info->subtype == 'c') {
$vallist = array_values(explode (FEEDBACK_MULTICHOICE_LINE_SEP, $value->value));
$sizeofvallist = count($vallist);
$sizeofpresentation = count($presentation);
for ($i = 0; $i < $sizeofvallist; $i++) {
for ($k = 0; $k < $sizeofpresentation; $k++) {
if ($vallist[$i] == ($k + 1)) {//Die Werte beginnen bei 1, das Array aber mit 0
$printval .= trim(format_string($presentation[$k])) . chr(10);
break;
}
}
}
} else {
$index = 1;
foreach ($presentation as $pres) {
if ($value->value == $index) {
$printval = format_string($pres);
break;
}
$index++;
}
}
return $printval;
}
public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
global $OUTPUT;
$analysed_item = $this->get_analysed($item, $groupid, $courseid);
if ($analysed_item) {
$itemname = $analysed_item[1];
echo "<table class=\"analysis itemtype_{$item->typ}\">";
echo '<tr><th colspan="2" align="left">';
echo $itemnr . ' ';
if (strval($item->label) !== '') {
echo '('. format_string($item->label).') ';
}
echo format_string($itemname);
echo '</th></tr>';
echo "</table>";
$analysed_vals = $analysed_item[2];
$count = 0;
$data = [];
foreach ($analysed_vals as $val) {
$quotient = format_float($val->quotient * 100, 2);
$strquotient = '';
if ($val->quotient > 0) {
$strquotient = ' ('. $quotient . ' %)';
}
$answertext = format_text(trim($val->answertext), FORMAT_HTML,
array('noclean' => true, 'para' => false));
$data['labels'][$count] = $answertext;
$data['series'][$count] = $val->answercount;
$data['series_labels'][$count] = $val->answercount . $strquotient;
$count++;
}
$chart = new \core\chart_bar();
$chart->set_horizontal(true);
$series = new \core\chart_series(format_string(get_string("responses", "feedback")), $data['series']);
$series->set_labels($data['series_labels']);
$chart->add_series($series);
$chart->set_labels($data['labels']);
echo $OUTPUT->render($chart);
}
}
public function excelprint_item(&$worksheet, $row_offset,
$xls_formats, $item,
$groupid, $courseid = false) {
$analysed_item = $this->get_analysed($item, $groupid, $courseid);
$data = $analysed_item[2];
//frage schreiben
$worksheet->write_string($row_offset, 0, $item->label, $xls_formats->head2);
$worksheet->write_string($row_offset, 1, $analysed_item[1], $xls_formats->head2);
if (is_array($data)) {
$sizeofdata = count($data);
for ($i = 0; $i < $sizeofdata; $i++) {
$analysed_data = $data[$i];
$worksheet->write_string($row_offset,
$i + 2,
trim($analysed_data->answertext),
$xls_formats->head2);
$worksheet->write_number($row_offset + 1,
$i + 2,
$analysed_data->answercount,
$xls_formats->default);
$worksheet->write_number($row_offset + 2,
$i + 2,
$analysed_data->quotient,
$xls_formats->procent);
}
}
$row_offset += 3;
return $row_offset;
}
/**
* Options for the multichoice element
* @param stdClass $item
* @return array
*/
protected function get_options($item) {
$info = $this->get_info($item);
$presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
$options = array();
foreach ($presentation as $idx => $optiontext) {
$options[$idx + 1] = format_text($optiontext, FORMAT_HTML, array('noclean' => true, 'para' => false));
}
if ($info->subtype === 'r' && !$this->hidenoselect($item)) {
$options = array(0 => get_string('not_selected', 'feedback')) + $options;
}
return $options;
}
/**
* Adds an input element to the complete form
*
* This element has many options - it can be displayed as group or radio elements,
* group of checkboxes or a dropdown list.
*
* @param stdClass $item
* @param mod_feedback_complete_form $form
*/
public function complete_form_element($item, $form) {
$info = $this->get_info($item);
$name = $this->get_display_name($item);
$class = 'multichoice-' . $info->subtype;
$inputname = $item->typ . '_' . $item->id;
$options = $this->get_options($item);
$separator = !empty($info->horizontal) ? ' ' : '<br>';
$tmpvalue = $form->get_item_value($item) ?? 0; // Used for element defaults, so must be a valid value (not null).
// Subtypes:
// r = radio
// c = checkbox
// d = dropdown.
if ($info->subtype === 'd' || ($info->subtype === 'r' && $form->is_frozen())) {
// Display as a dropdown in the complete form or a single value in the response view.
$element = $form->add_form_element($item,
['select', $inputname, $name, array(0 => '') + $options, array('class' => $class)],
false, false);
$form->set_element_default($inputname, $tmpvalue);
$form->set_element_type($inputname, PARAM_INT);
} else if ($info->subtype === 'c' && $form->is_frozen()) {
// Display list of checkbox values in the response view.
$objs = [];
foreach (explode(FEEDBACK_MULTICHOICE_LINE_SEP, $form->get_item_value($item)) as $v) {
$objs[] = ['static', $inputname."[$v]", '', isset($options[$v]) ? $options[$v] : ''];
}
$element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
} else {
// Display group or radio or checkbox elements.
$class .= ' multichoice-' . ($info->horizontal ? 'horizontal' : 'vertical');
$objs = [];
if ($info->subtype === 'c') {
// Checkboxes.
$objs[] = ['hidden', $inputname.'[0]', 0];
$form->set_element_type($inputname.'[0]', PARAM_INT);
foreach ($options as $idx => $label) {
$objs[] = ['advcheckbox', $inputname.'['.$idx.']', '', $label, null, array(0, $idx)];
$form->set_element_type($inputname.'['.$idx.']', PARAM_INT);
}
// Span to hold the element id. The id is used for drag and drop reordering.
$objs[] = ['static', '', '', html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])];
$element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
if ($tmpvalue) {
foreach (explode(FEEDBACK_MULTICHOICE_LINE_SEP, $tmpvalue) as $v) {
$form->set_element_default($inputname.'['.$v.']', $v);
}
}
} else {
// Radio.
if (!array_key_exists(0, $options)) {
// Always add a hidden element to the group to guarantee we get a value in the submit data.
$objs[] = ['hidden', $inputname, 0];
}
foreach ($options as $idx => $label) {
$objs[] = ['radio', $inputname, '', $label, $idx];
}
// Span to hold the element id. The id is used for drag and drop reordering.
$objs[] = ['static', '', '', html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])];
$element = $form->add_form_group_element($item, 'group_'.$inputname, $name, $objs, $separator, $class);
$form->set_element_default($inputname, $tmpvalue);
$form->set_element_type($inputname, PARAM_INT);
}
}
// Process 'required' rule.
if ($item->required) {
$elementname = $element->getName();
$form->add_validation_rule(function($values) use ($elementname, $item) {
$inputname = $item->typ . '_' . $item->id;
return empty($values[$inputname]) || (is_array($values[$inputname]) && !array_filter($values[$inputname])) ?
array($elementname => get_string('required')) : true;
});
}
}
/**
* Prepares value that user put in the form for storing in DB
* @param array $value
* @return string
*/
public function create_value($value) {
// Could be an array (multichoice checkbox) or single value (multichoice radio or dropdown).
$value = is_array($value) ? $value : [$value];
$value = array_unique(array_filter($value));
return join(FEEDBACK_MULTICHOICE_LINE_SEP, $value);
}
/**
* Compares the dbvalue with the dependvalue
*
* @param stdClass $item
* @param string $dbvalue is the value input by user in the format as it is stored in the db
* @param string $dependvalue is the value that it needs to be compared against
*/
public function compare_value($item, $dbvalue, $dependvalue) {
if (is_array($dbvalue)) {
$dbvalues = $dbvalue;
} else {
$dbvalues = explode(FEEDBACK_MULTICHOICE_LINE_SEP, $dbvalue);
}
$info = $this->get_info($item);
$presentation = explode (FEEDBACK_MULTICHOICE_LINE_SEP, $info->presentation);
$index = 1;
foreach ($presentation as $pres) {
foreach ($dbvalues as $dbval) {
if ($dbval == $index AND trim($pres) == $dependvalue) {
return true;
}
}
$index++;
}
return false;
}
public function get_info($item) {
$presentation = empty($item->presentation) ? '' : $item->presentation;
$info = new stdClass();
//check the subtype of the multichoice
//it can be check(c), radio(r) or dropdown(d)
$info->subtype = '';
$info->presentation = '';
$info->horizontal = false;
$parts = explode(FEEDBACK_MULTICHOICE_TYPE_SEP, $item->presentation);
@list($info->subtype, $info->presentation) = $parts;
if (!isset($info->subtype)) {
$info->subtype = 'r';
}
if ($info->subtype != 'd') {
$parts = explode(FEEDBACK_MULTICHOICE_ADJUST_SEP, $info->presentation);
@list($info->presentation, $info->horizontal) = $parts;
if (isset($info->horizontal) AND $info->horizontal == 1) {
$info->horizontal = true;
} else {
$info->horizontal = false;
}
}
return $info;
}
public function set_ignoreempty($item, $ignoreempty=true) {
$item->options = str_replace(FEEDBACK_MULTICHOICE_IGNOREEMPTY, '', $item->options);
if ($ignoreempty) {
$item->options .= FEEDBACK_MULTICHOICE_IGNOREEMPTY;
}
}
public function ignoreempty($item) {
if (strstr($item->options, FEEDBACK_MULTICHOICE_IGNOREEMPTY)) {
return true;
}
return false;
}
public function set_hidenoselect($item, $hidenoselect=true) {
$item->options = str_replace(FEEDBACK_MULTICHOICE_HIDENOSELECT, '', $item->options);
if ($hidenoselect) {
$item->options .= FEEDBACK_MULTICHOICE_HIDENOSELECT;
}
}
public function hidenoselect($item) {
if (strstr($item->options, FEEDBACK_MULTICHOICE_HIDENOSELECT)) {
return true;
}
return false;
}
/**
* Return the analysis data ready for external functions.
*
* @param stdClass $item the item (question) information
* @param int $groupid the group id to filter data (optional)
* @param int $courseid the course id (optional)
* @return array an array of data with non scalar types json encoded
* @since Moodle 3.3
*/
public function get_analysed_for_external($item, $groupid = false, $courseid = false) {
$externaldata = array();
$data = $this->get_analysed($item, $groupid, $courseid);
if (!empty($data[2]) && is_array($data[2])) {
foreach ($data[2] as $d) {
$externaldata[] = json_encode($d);
}
}
return $externaldata;
}
}