<?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/>.

/**

<  * Base class for the table used by a {@link quiz_attempts_report}.



>  * File only retained to prevent fatal errors in code that tries to require/include this.


 *

<  * @package   mod_quiz
<  * @copyright 2010 The Open University
<  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later



>  * @todo MDL-76612 delete this file as part of Moodle 4.6 development.
>  * @deprecated This file is no longer required in Moodle 4.2+.


 */

< 
< 


defined('MOODLE_INTERNAL') || die();


< require_once($CFG->libdir.'/tablelib.php');
< 
< 
< /**
<  * Base class for the table used by a {@link quiz_attempts_report}.
<  *
<  * @copyright 2010 The Open University
<  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
<  */
< abstract class quiz_attempts_report_table extends table_sql {
<     public $useridfield = 'userid';
< 
<     /** @var moodle_url the URL of this report. */
<     protected $reporturl;
< 
<     /** @var array the display options. */
<     protected $displayoptions;
< 
<     /**
<      * @var array information about the latest step of each question.
<      * Loaded by {@link load_question_latest_steps()}, if applicable.
<      */
<     protected $lateststeps = null;
< 
<     /** @var object the quiz settings for the quiz we are reporting on. */
<     protected $quiz;
< 
<     /** @var context the quiz context. */
<     protected $context;
< 
<     /** @var string HTML fragment to select the first/best/last attempt, if appropriate. */
<     protected $qmsubselect;
< 
<     /** @var object mod_quiz_attempts_report_options the options affecting this report. */
<     protected $options;
< 
<     /** @var \core\dml\sql_join Contains joins, wheres, params to find students
<      * in the currently selected group, if applicable.
<      */
<     protected $groupstudentsjoins;
< 
<     /** @var \core\dml\sql_join Contains joins, wheres, params to find the students in the course. */
<     protected $studentsjoins;
< 
<     /** @var object the questions that comprise this quiz.. */
<     protected $questions;
< 
<     /** @var bool whether to include the column with checkboxes to select each attempt. */
<     protected $includecheckboxes;
< 
<     /** @var string The toggle group name for the checkboxes in the checkbox column. */
<     protected $togglegroup = 'quiz-attempts';
< 
<     /**
<      * Constructor
<      * @param string $uniqueid
<      * @param object $quiz
<      * @param context $context
<      * @param string $qmsubselect
<      * @param mod_quiz_attempts_report_options $options
<      * @param \core\dml\sql_join $groupstudentsjoins Contains joins, wheres, params
<      * @param \core\dml\sql_join $studentsjoins Contains joins, wheres, params
<      * @param array $questions
<      * @param moodle_url $reporturl
<      */
<     public function __construct($uniqueid, $quiz, $context, $qmsubselect,
<             mod_quiz_attempts_report_options $options, \core\dml\sql_join $groupstudentsjoins, \core\dml\sql_join $studentsjoins,
<             $questions, $reporturl) {
<         parent::__construct($uniqueid);
<         $this->quiz = $quiz;
<         $this->context = $context;
<         $this->qmsubselect = $qmsubselect;
<         $this->groupstudentsjoins = $groupstudentsjoins;
<         $this->studentsjoins = $studentsjoins;
<         $this->questions = $questions;
<         $this->includecheckboxes = $options->checkboxcolumn;
<         $this->reporturl = $reporturl;
<         $this->options = $options;
<     }
< 
<     /**
<      * Generate the display of the checkbox column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_checkbox($attempt) {
<         global $OUTPUT;
< 
<         if ($attempt->attempt) {
<             $checkbox = new \core\output\checkbox_toggleall($this->togglegroup, false, [
<                 'id' => "attemptid_{$attempt->attempt}",
<                 'name' => 'attemptid[]',
<                 'value' => $attempt->attempt,
<                 'label' => get_string('selectattempt', 'quiz'),
<                 'labelclasses' => 'accesshide',
<             ]);
<             return $OUTPUT->render($checkbox);
<         } else {
<             return '';
<         }
<     }
< 
<     /**
<      * Generate the display of the user's picture column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_picture($attempt) {
<         global $OUTPUT;
<         $user = new stdClass();
<         $additionalfields = explode(',', implode(',', \core_user\fields::get_picture_fields()));
<         $user = username_load_fields_from_object($user, $attempt, null, $additionalfields);
<         $user->id = $attempt->userid;
<         return $OUTPUT->user_picture($user);
<     }
< 
<     /**
<      * Generate the display of the user's full name column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_fullname($attempt) {
<         $html = parent::col_fullname($attempt);
<         if ($this->is_downloading() || empty($attempt->attempt)) {
<             return $html;
<         }
< 
<         return $html . html_writer::empty_tag('br') . html_writer::link(
<                 new moodle_url('/mod/quiz/review.php', array('attempt' => $attempt->attempt)),
<                 get_string('reviewattempt', 'quiz'), array('class' => 'reviewlink'));
<     }
< 
<     /**
<      * Generate the display of the attempt state column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_state($attempt) {
<         if (!is_null($attempt->attempt)) {
<             return quiz_attempt::state_name($attempt->state);
<         } else {
<             return  '-';
<         }
<     }
< 
<     /**
<      * Generate the display of the start time column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_timestart($attempt) {
<         if ($attempt->attempt) {
<             return userdate($attempt->timestart, $this->strtimeformat);
<         } else {
<             return  '-';
<         }
<     }
< 
<     /**
<      * Generate the display of the finish time column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_timefinish($attempt) {
<         if ($attempt->attempt && $attempt->timefinish) {
<             return userdate($attempt->timefinish, $this->strtimeformat);
<         } else {
<             return  '-';
<         }
<     }
< 
<     /**
<      * Generate the display of the time taken column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_duration($attempt) {
<         if ($attempt->timefinish) {
<             return format_time($attempt->timefinish - $attempt->timestart);
<         } else {
<             return '-';
<         }
<     }
< 
<     /**
<      * Generate the display of the feedback column.
<      * @param object $attempt the table row being output.
<      * @return string HTML content to go inside the td.
<      */
<     public function col_feedbacktext($attempt) {
<         if ($attempt->state != quiz_attempt::FINISHED) {
<             return '-';
<         }
< 
<         $feedback = quiz_report_feedback_for_grade(
<                 quiz_rescale_grade($attempt->sumgrades, $this->quiz, false),
<                 $this->quiz->id, $this->context);
< 
<         if ($this->is_downloading()) {
<             $feedback = strip_tags($feedback);
<         }
< 
<         return $feedback;
<     }
< 
<     public function get_row_class($attempt) {
<         if ($this->qmsubselect && $attempt->gradedattempt) {
<             return 'gradedattempt';
<         } else {
<             return '';
<         }
<     }
< 
<     /**
<      * Make a link to review an individual question in a popup window.
<      *
<      * @param string $data HTML fragment. The text to make into the link.
<      * @param object $attempt data for the row of the table being output.
<      * @param int $slot the number used to identify this question within this usage.
<      */
<     public function make_review_link($data, $attempt, $slot) {
<         global $OUTPUT, $CFG;
< 
<         $flag = '';
<         if ($this->is_flagged($attempt->usageid, $slot)) {
<             $flag = $OUTPUT->pix_icon('i/flagged', get_string('flagged', 'question'),
<                     'moodle', array('class' => 'questionflag'));
<         }
< 
<         $feedbackimg = '';
<         $state = $this->slot_state($attempt, $slot);
<         if ($state->is_finished() && $state != question_state::$needsgrading) {
<             $feedbackimg = $this->icon_for_fraction($this->slot_fraction($attempt, $slot));
<         }
< 
<         $output = html_writer::tag('span', $feedbackimg . html_writer::tag('span',
<                 $data, array('class' => $state->get_state_class(true))) . $flag, array('class' => 'que'));
< 
<         $reviewparams = array('attempt' => $attempt->attempt, 'slot' => $slot);
<         if (isset($attempt->try)) {
<             $reviewparams['step'] = $this->step_no_for_try($attempt->usageid, $slot, $attempt->try);
<         }
<         $url = new moodle_url('/mod/quiz/reviewquestion.php', $reviewparams);
<         $output = $OUTPUT->action_link($url, $output,
<                 new popup_action('click', $url, 'reviewquestion',
<                         array('height' => 450, 'width' => 650)),
<                 array('title' => get_string('reviewresponse', 'quiz')));
< 
<         if (!empty($CFG->enableplagiarism)) {
<             require_once($CFG->libdir . '/plagiarismlib.php');
<             $output .= plagiarism_get_links([
<                 'context' => $this->context->id,
<                 'component' => 'qtype_'.$this->questions[$slot]->qtype,
<                 'cmid' => $this->context->instanceid,
<                 'area' => $attempt->usageid,
<                 'itemid' => $slot,
<                 'userid' => $attempt->userid]);
<         }
<         return $output;
<     }
< 
<     /**
<      * @param object $attempt the row data
<      * @param int $slot
<      * @return question_state
<      */
<     protected function slot_state($attempt, $slot) {
<         $stepdata = $this->lateststeps[$attempt->usageid][$slot];
<         return question_state::get($stepdata->state);
<     }
< 
<     /**
<      * @param int $questionusageid
<      * @param int $slot
<      * @return bool
<      */
<     protected function is_flagged($questionusageid, $slot) {
<         $stepdata = $this->lateststeps[$questionusageid][$slot];
<         return $stepdata->flagged;
<     }
< 
< 
<     /**
<      * @param object $attempt the row data
<      * @param int $slot
<      * @return float
<      */
<     protected function slot_fraction($attempt, $slot) {
<         $stepdata = $this->lateststeps[$attempt->usageid][$slot];
<         return $stepdata->fraction;
<     }
< 
<     /**
<      * Return an appropriate icon (green tick, red cross, etc.) for a grade.
<      * @param float $fraction grade on a scale 0..1.
<      * @return string html fragment.
<      */
<     protected function icon_for_fraction($fraction) {
<         global $OUTPUT;
< 
<         $feedbackclass = question_state::graded_state_for_fraction($fraction)->get_feedback_class();
<         return $OUTPUT->pix_icon('i/grade_' . $feedbackclass, get_string($feedbackclass, 'question'),
<                 'moodle', array('class' => 'icon'));
<     }
< 
<     /**
<      * Load any extra data after main query. At this point you can call {@link get_qubaids_condition} to get the condition that
<      * limits the query to just the question usages shown in this report page or alternatively for all attempts if downloading a
<      * full report.
<      */
<     protected function load_extra_data() {
<         $this->lateststeps = $this->load_question_latest_steps();
<     }
< 
<     /**
<      * Load information about the latest state of selected questions in selected attempts.
<      *
<      * The results are returned as an two dimensional array $qubaid => $slot => $dataobject
<      *
<      * @param qubaid_condition|null $qubaids used to restrict which usages are included
<      * in the query. See {@link qubaid_condition}.
<      * @return array of records. See the SQL in this function to see the fields available.
<      */
<     protected function load_question_latest_steps(qubaid_condition $qubaids = null) {
<         if ($qubaids === null) {
<             $qubaids = $this->get_qubaids_condition();
<         }
<         $dm = new question_engine_data_mapper();
<         $latesstepdata = $dm->load_questions_usages_latest_steps(
<                 $qubaids, array_keys($this->questions));
< 
<         $lateststeps = array();
<         foreach ($latesstepdata as $step) {
<             $lateststeps[$step->questionusageid][$step->slot] = $step;
<         }
< 
<         return $lateststeps;
<     }
< 
<     /**
<      * Does this report require loading any more data after the main query. After the main query then
<      * you can use $this->get
<      *
<      * @return bool should {@link query_db()} call {@link load_extra_data}?
<      */
<     protected function requires_extra_data() {
<         return $this->requires_latest_steps_loaded();
<     }
< 
<     /**
<      * Does this report require the detailed information for each question from the
<      * question_attempts_steps table?
<      * @return bool should {@link load_extra_data} call {@link load_question_latest_steps}?
<      */
<     protected function requires_latest_steps_loaded() {
<         return false;
<     }
< 
<     /**
<      * Is this a column that depends on joining to the latest state information?
<      * If so, return the corresponding slot. If not, return false.
<      * @param string $column a column name
<      * @return int false if no, else a slot.
<      */
<     protected function is_latest_step_column($column) {
<         return false;
<     }
< 
<     /**
<      * Get any fields that might be needed when sorting on date for a particular slot.
<      *
<      * Note: these values are only used for sorting. The values displayed are taken
<      * from $this->lateststeps loaded in load_extra_data().
<      *
<      * @param int $slot the slot for the column we want.
<      * @param string $alias the table alias for latest state information relating to that slot.
<      * @return string definitions of extra fields to add to the SELECT list of the query.
<      */
<     protected function get_required_latest_state_fields($slot, $alias) {
<         return '';
<     }
< 
<     /**
<      * Contruct all the parts of the main database query.
<      * @param \core\dml\sql_join $allowedstudentsjoins (joins, wheres, params) defines allowed users for the report.
<      * @return array with 4 elements ($fields, $from, $where, $params) that can be used to
<      *     build the actual database query.
<      */
<     public function base_sql(\core\dml\sql_join $allowedstudentsjoins) {
<         global $DB;
< 
<         // Please note this uniqueid column is not the same as quiza.uniqueid.
<         $fields = 'DISTINCT ' . $DB->sql_concat('u.id', "'#'", 'COALESCE(quiza.attempt, 0)') . ' AS uniqueid,';
< 
<         if ($this->qmsubselect) {
<             $fields .= "\n(CASE WHEN $this->qmsubselect THEN 1 ELSE 0 END) AS gradedattempt,";
<         }
< 
<         // TODO Does not support custom user profile fields (MDL-70456).
<         $userfields = \core_user\fields::for_identity($this->context, false)->with_name()
<                 ->excluding('id', 'idnumber', 'picture', 'imagealt', 'institution', 'department', 'email');
<         $extrafields = $userfields->get_sql('u')->selects;
<         $fields .= '
<                 quiza.uniqueid AS usageid,
<                 quiza.id AS attempt,
<                 u.id AS userid,
<                 u.idnumber,
<                 u.picture,
<                 u.imagealt,
<                 u.institution,
<                 u.department,
<                 u.email' . $extrafields . ',
<                 quiza.state,
<                 quiza.sumgrades,
<                 quiza.timefinish,
<                 quiza.timestart,
<                 CASE WHEN quiza.timefinish = 0 THEN null
<                      WHEN quiza.timefinish > quiza.timestart THEN quiza.timefinish - quiza.timestart
<                      ELSE 0 END AS duration';
<             // To explain that last bit, timefinish can be non-zero and less
<             // than timestart when you have two load-balanced servers with very
<             // badly synchronised clocks, and a student does a really quick attempt.
< 
<         // This part is the same for all cases. Join the users and quiz_attempts tables.
<         $from = " {user} u";
<         $from .= "\nLEFT JOIN {quiz_attempts} quiza ON
<                                     quiza.userid = u.id AND quiza.quiz = :quizid";
<         $params = array('quizid' => $this->quiz->id);
< 
<         if ($this->qmsubselect && $this->options->onlygraded) {
<             $from .= " AND (quiza.state <> :finishedstate OR $this->qmsubselect)";
<             $params['finishedstate'] = quiz_attempt::FINISHED;
<         }
< 
<         switch ($this->options->attempts) {
<             case quiz_attempts_report::ALL_WITH:
<                 // Show all attempts, including students who are no longer in the course.
<                 $where = 'quiza.id IS NOT NULL AND quiza.preview = 0';
<                 break;
<             case quiz_attempts_report::ENROLLED_WITH:
<                 // Show only students with attempts.
<                 $from .= "\n" . $allowedstudentsjoins->joins;
<                 $where = "quiza.preview = 0 AND quiza.id IS NOT NULL AND " . $allowedstudentsjoins->wheres;
<                 $params = array_merge($params, $allowedstudentsjoins->params);
<                 break;
<             case quiz_attempts_report::ENROLLED_WITHOUT:
<                 // Show only students without attempts.
<                 $from .= "\n" . $allowedstudentsjoins->joins;
<                 $where = "quiza.id IS NULL AND " . $allowedstudentsjoins->wheres;
<                 $params = array_merge($params, $allowedstudentsjoins->params);
<                 break;
<             case quiz_attempts_report::ENROLLED_ALL:
<                 // Show all students with or without attempts.
<                 $from .= "\n" . $allowedstudentsjoins->joins;
<                 $where = "(quiza.preview = 0 OR quiza.preview IS NULL) AND " . $allowedstudentsjoins->wheres;
<                 $params = array_merge($params, $allowedstudentsjoins->params);
<                 break;
<         }
< 
<         if ($this->options->states) {
<             list($statesql, $stateparams) = $DB->get_in_or_equal($this->options->states,
<                     SQL_PARAMS_NAMED, 'state');
<             $params += $stateparams;
<             $where .= " AND (quiza.state $statesql OR quiza.state IS NULL)";
<         }
< 
<         return array($fields, $from, $where, $params);
<     }
< 
<     /**
<      * A chance for subclasses to modify the SQL after the count query has been generated,
<      * and before the full query is constructed.
<      * @param string $fields SELECT list.
<      * @param string $from JOINs part of the SQL.
<      * @param string $where WHERE clauses.
<      * @param array $params Query params.
<      * @return array with 4 elements ($fields, $from, $where, $params) as from base_sql.
<      */
<     protected function update_sql_after_count($fields, $from, $where, $params) {
<         return [$fields, $from, $where, $params];
<     }
< 
<     /**
<      * Set up the SQL queries (count rows, and get data).
<      *
<      * @param \core\dml\sql_join $allowedjoins (joins, wheres, params) defines allowed users for the report.
<      */
<     public function setup_sql_queries($allowedjoins) {
<         list($fields, $from, $where, $params) = $this->base_sql($allowedjoins);
< 
<         // The WHERE clause is vital here, because some parts of tablelib.php will expect to
<         // add bits like ' AND x = 1' on the end, and that needs to leave to valid SQL.
<         $this->set_count_sql("SELECT COUNT(1) FROM (SELECT $fields FROM $from WHERE $where) temp WHERE 1 = 1", $params);
< 
<         list($fields, $from, $where, $params) = $this->update_sql_after_count($fields, $from, $where, $params);
<         $this->set_sql($fields, $from, $where, $params);
<     }
< 
<     /**
<      * Add the information about the latest state of the question with slot
<      * $slot to the query.
<      *
<      * The extra information is added as a join to a
<      * 'table' with alias qa$slot, with columns that are a union of
<      * the columns of the question_attempts and question_attempts_states tables.
<      *
<      * @param int $slot the question to add information for.
<      */
<     protected function add_latest_state_join($slot) {
<         $alias = 'qa' . $slot;
< 
<         $fields = $this->get_required_latest_state_fields($slot, $alias);
<         if (!$fields) {
<             return;
<         }
< 
<         // This condition roughly filters the list of attempts to be considered.
<         // It is only used in a subselect to help crappy databases (see MDL-30122)
<         // therefore, it is better to use a very simple join, which may include
<         // too many records, than to do a super-accurate join.
<         $qubaids = new qubaid_join("{quiz_attempts} {$alias}quiza", "{$alias}quiza.uniqueid",
<                 "{$alias}quiza.quiz = :{$alias}quizid", array("{$alias}quizid" => $this->sql->params['quizid']));
< 
<         $dm = new question_engine_data_mapper();
<         list($inlineview, $viewparams) = $dm->question_attempt_latest_state_view($alias, $qubaids);
< 
<         $this->sql->fields .= ",\n$fields";
<         $this->sql->from .= "\nLEFT JOIN $inlineview ON " .
<                 "$alias.questionusageid = quiza.uniqueid AND $alias.slot = :{$alias}slot";
<         $this->sql->params[$alias . 'slot'] = $slot;
<         $this->sql->params = array_merge($this->sql->params, $viewparams);
<     }
< 
<     /**
<      * Get an appropriate qubaid_condition for loading more data about the
<      * attempts we are displaying.
<      * @return qubaid_condition
<      */
<     protected function get_qubaids_condition() {
<         if (is_null($this->rawdata)) {
<             throw new coding_exception(
<                     'Cannot call get_qubaids_condition until the main data has been loaded.');
<         }
< 
<         if ($this->is_downloading()) {
<             // We want usages for all attempts.
<             return new qubaid_join("(
<                 SELECT DISTINCT quiza.uniqueid
<                   FROM " . $this->sql->from . "
<                  WHERE " . $this->sql->where . "
<                     ) quizasubquery", 'quizasubquery.uniqueid',
<                     "1 = 1", $this->sql->params);
<         }
< 
<         $qubaids = array();
<         foreach ($this->rawdata as $attempt) {
<             if ($attempt->usageid > 0) {
<                 $qubaids[] = $attempt->usageid;
<             }
<         }
< 
<         return new qubaid_list($qubaids);
<     }
< 
<     public function query_db($pagesize, $useinitialsbar = true) {
<         $doneslots = array();
<         foreach ($this->get_sort_columns() as $column => $notused) {
<             $slot = $this->is_latest_step_column($column);
<             if ($slot && !in_array($slot, $doneslots)) {
<                 $this->add_latest_state_join($slot);
<                 $doneslots[] = $slot;
<             }
<         }
< 
<         parent::query_db($pagesize, $useinitialsbar);
< 
<         if ($this->requires_extra_data()) {
<             $this->load_extra_data();
<         }
<     }
< 
<     public function get_sort_columns() {
<         // Add attemptid as a final tie-break to the sort. This ensures that
<         // Attempts by the same student appear in order when just sorting by name.
<         $sortcolumns = parent::get_sort_columns();
<         $sortcolumns['quiza.id'] = SORT_ASC;
<         return $sortcolumns;
<     }
< 
<     public function wrap_html_start() {
<         if ($this->is_downloading() || !$this->includecheckboxes) {
<             return;
<         }
< 
<         $url = $this->options->get_url();
<         $url->param('sesskey', sesskey());
< 
<         echo '<div id="tablecontainer">';
<         echo '<form id="attemptsform" method="post" action="' . $url->out_omit_querystring() . '">';
< 
<         echo html_writer::input_hidden_params($url);
<         echo '<div>';
<     }
< 
<     public function wrap_html_finish() {
<         global $PAGE;
<         if ($this->is_downloading() || !$this->includecheckboxes) {
<             return;
<         }
< 
<         echo '<div id="commands">';
<         $this->submit_buttons();
<         echo '</div>';
< 
<         // Close the form.
<         echo '</div>';
<         echo '</form></div>';
<     }
< 
<     /**
<      * Output any submit buttons required by the $this->includecheckboxes form.
<      */
<     protected function submit_buttons() {
<         global $PAGE;
<         if (has_capability('mod/quiz:deleteattempts', $this->context)) {
<             $deletebuttonparams = [
<                 'type'  => 'submit',
<                 'class' => 'btn btn-secondary mr-1',
<                 'id'    => 'deleteattemptsbutton',
<                 'name'  => 'delete',
<                 'value' => get_string('deleteselected', 'quiz_overview'),
<                 'data-action' => 'toggle',
<                 'data-togglegroup' => $this->togglegroup,
<                 'data-toggle' => 'action',
<                 'disabled' => true
<             ];
<             echo html_writer::empty_tag('input', $deletebuttonparams);
<             $PAGE->requires->event_handler('#deleteattemptsbutton', 'click', 'M.util.show_confirm_dialog',
<                     array('message' => get_string('deleteattemptcheck', 'quiz')));
<         }
<     }
< 
<     /**
<      * Generates the contents for the checkbox column header.
<      *
<      * It returns the HTML for a master \core\output\checkbox_toggleall component that selects/deselects all quiz attempts.
<      *
<      * @param string $columnname The name of the checkbox column.
<      * @return string
<      */
<     public function checkbox_col_header(string $columnname) {
<         global $OUTPUT;
< 
<         // Make sure to disable sorting on this column.
<         $this->no_sorting($columnname);
< 
<         // Build the select/deselect all control.
<         $selectallid = $this->uniqueid . '-selectall-attempts';
<         $selectalltext = get_string('selectall', 'quiz');
<         $deselectalltext = get_string('selectnone', 'quiz');
<         $mastercheckbox = new \core\output\checkbox_toggleall($this->togglegroup, true, [
<             'id' => $selectallid,
<             'name' => $selectallid,
<             'value' => 1,
<             'label' => $selectalltext,
<             'labelclasses' => 'accesshide',
<             'selectall' => $selectalltext,
<             'deselectall' => $deselectalltext,
<         ]);
< 
<         return $OUTPUT->render($mastercheckbox);
<     }
< }



> debugging('This file is no longer required in Moodle 4.2+. Please do not include/require it.', DEBUG_DEVELOPER);