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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/>.
/**
* This page handles listing of quiz overrides
*
* @package mod_quiz
* @copyright 2010 Matt Petro
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(__FILE__) . '/../../config.php');
require_once($CFG->dirroot.'/mod/quiz/lib.php');
require_once($CFG->dirroot.'/mod/quiz/locallib.php');
require_once($CFG->dirroot.'/mod/quiz/override_form.php');
$cmid = required_param('cmid', PARAM_INT); // course module ID, or
$mode = optional_param('mode', '', PARAM_ALPHA); // one of 'user' or 'group', default is 'group'
if (! $cm = get_coursemodule_from_id('quiz', $cmid)) {
print_error('invalidcoursemodule');
}
if (! $quiz = $DB->get_record('quiz', array('id' => $cm->instance))) {
print_error('invalidcoursemodule');
}
$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
// Get the course groups
$groups = groups_get_all_groups($cm->course);
if ($groups === false) {
$groups = array();
}
// Default mode is "group", unless there are no groups
if ($mode != "user" and $mode != "group") {
if (!empty($groups)) {
$mode = "group";
} else {
$mode = "user";
}
}
$groupmode = ($mode == "group");
$url = new moodle_url('/mod/quiz/overrides.php', array('cmid'=>$cm->id, 'mode'=>$mode));
$PAGE->set_url($url);
require_login($course, false, $cm);
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
// Check the user has the required capabilities to list overrides
require_capability('mod/quiz:manageoverrides', $context);
// Display a list of overrides
$PAGE->set_pagelayout('admin');
$PAGE->set_title(get_string('overrides', 'quiz'));
$PAGE->set_heading($course->fullname);
echo $OUTPUT->header();
// Delete orphaned group overrides
$sql = 'SELECT o.id
FROM {quiz_overrides} o LEFT JOIN {groups} g
ON o.groupid = g.id
WHERE o.groupid IS NOT NULL
AND g.id IS NULL
AND o.quiz = ?';
$params = array($quiz->id);
$orphaned = $DB->get_records_sql($sql, $params);
if (!empty($orphaned)) {
$DB->delete_records_list('quiz_overrides', 'id', array_keys($orphaned));
}
// Fetch all overrides
if ($groupmode) {
$colname = get_string('group');
$sql = 'SELECT o.*, g.name
FROM {quiz_overrides} o JOIN {groups} g
ON o.groupid = g.id
WHERE o.quiz = ?
ORDER BY g.name';
}
else {
$colname = get_string('user');
$sql = 'SELECT o.*, u.firstname, u.lastname
FROM {quiz_overrides} o JOIN {user} u
ON o.userid = u.id
WHERE o.quiz = ?
ORDER BY u.lastname, u.firstname';
}
$params = array($quiz->id);
$overrides = $DB->get_records_sql($sql, $params);
// Initialise table
$table = new html_table();
$table->headspan = array(1,2,1);
$table->colclasses = array('colname','colsetting','colvalue','colaction');
$table->head = array(
$colname,
get_string('overrides', 'quiz'),
get_string('action'),
);
$userurl = new moodle_url('/user/view.php', array());
$groupurl = new moodle_url('/group/overview.php', array('id' => $cm->course));
$overridedeleteurl = new moodle_url('/mod/quiz/overridedelete.php');
$overrideediturl = new moodle_url('/mod/quiz/overrideedit.php');
$hasinactive = false; // are there any inactive overrides
foreach ($overrides as $override) {
$fields = array();
$values = array();
$active = true;
// check for inactive overrides
if (!$groupmode) {
if (!has_capability('mod/quiz:attempt', $context, $override->userid)) {
// user not allowed to take the quiz
$active = false;
} else if (!empty($CFG->enablegroupmembersonly) && $cm->groupmembersonly && !groups_has_membership($cm, $override->userid)) {
// user does not belong to the current grouping
$active = false;
}
}
// Format timeopen
if (isset($override->timeopen)) {
$fields[] = get_string('quizopens', 'quiz');
$values[] = ($override->timeopen > 0)? userdate($override->timeopen) : get_string('noopen', 'quiz');
}
// Format timeclose
if (isset($override->timeclose)) {
$fields[] = get_string('quizcloses', 'quiz');
$values[] = ($override->timeclose > 0)? userdate($override->timeclose) : get_string('noclose', 'quiz');
}
// Format timelimit
if (isset($override->timelimit)) {
$fields[] = get_string('timelimit', 'quiz');
$values[] = ($override->timelimit > 0)? format_time($override->timelimit) : get_string('none', 'quiz');
}
// Format number of attempts
if (isset($override->attempts)) {
$fields[] = get_string('attempts', 'quiz');
$values[] = ($override->attempts > 0)? $override->attempts : get_string('unlimited');
}
// Format password
if (isset($override->password)) {
$fields[] = get_string('requirepassword', 'quiz');
$values[] = ($override->password !== '')? get_string('enabled', 'quiz') : get_string('none', 'quiz');
}
// Icons:
$iconstr = '';
if ($active) {
// edit
$editurlstr = $overrideediturl->out(true, array('id' => $override->id));
$iconstr = '<a title="' . get_string('edit') . '" href="'. $editurlstr . '">' .
'<img src="' . $OUTPUT->pix_url('t/edit') . '" class="iconsmall" alt="' . get_string('edit') . '" /></a> ';
// duplicate
$copyurlstr = $overrideediturl->out(true, array('id' => $override->id, 'action' => 'duplicate'));
$iconstr .= '<a title="' . get_string('copy') . '" href="' . $copyurlstr . '">' .
'<img src="' . $OUTPUT->pix_url('t/copy') . '" class="iconsmall" alt="' . get_string('copy') . '" /></a> ';
}
// delete
$deleteurlstr = $overridedeleteurl->out(true, array('id' => $override->id, 'sesskey' => sesskey()));
$iconstr .= '<a title="' . get_string('delete') . '" href="' . $deleteurlstr . '">' .
'<img src="' . $OUTPUT->pix_url('t/delete') . '" class="iconsmall" alt="' . get_string('delete') . '" /></a> ';
if ($groupmode) {
$usergroupstr = '<a href="' . $groupurl->out(true, array('group' => $override->groupid)) . '" >' . $override->name . '</a>';
}
else {
$usergroupstr = '<a href="' . $userurl->out(true, array('id' => $override->userid)) . '" >' . fullname($override) . '</a>';
}
$class = '';
if (!$active) {
$class = "dimmed_text";
$usergroupstr .= '*';
$hasinactive = true;
}
$usergroupcell = new html_table_cell();
$usergroupcell->rowspan = count($fields);
$usergroupcell->text = $usergroupstr;
$actioncell = new html_table_cell();
$actioncell->rowspan = count($fields);
$actioncell->text = $iconstr;
for ($i = 0; $i < count($fields); ++$i) {
$row = new html_table_row();
$row->attributes['class'] = $class;
if ($i == 0) {
$row->cells[] = $usergroupcell;
}
$cell1 = new html_table_cell();
$cell1->text = $fields[$i];
$row->cells[] = $cell1;
$cell2 = new html_table_cell();
$cell2->text = $values[$i];
$row->cells[] = $cell2;
if ($i == 0) {
$row->cells[] = $actioncell;
}
$table->data[] = $row;
}
}
// Output the table and button
echo html_writer::start_tag('div', array('id' => 'quizoverrides'));
if (count($table->data)) {
echo html_writer::table($table);
}
if ($hasinactive) {
echo $OUTPUT->notification(get_string('inactiveoverridehelp', 'quiz'), 'dimmed_text');
}
echo html_writer::start_tag('div', array('class' => 'buttons'));
$options = array();
if ($groupmode) {
if (empty($groups)) {
// there are no groups
echo $OUTPUT->notification(get_string('groupsnone', 'quiz'), 'error');
$options['disabled'] = true;
}
echo $OUTPUT->single_button($overrideediturl->out(true, array('action' => 'addgroup', 'cmid' => $cm->id)),
get_string('addnewgroupoverride', 'quiz'), 'post', $options);
} else {
$users = array();
// See if there are any students in the quiz
if (!empty($CFG->enablegroupmembersonly) && $cm->groupmembersonly) {
// restrict to grouping
$limitgroups = groups_get_all_groups($cm->course, 0, $cm->groupingid);
if (!empty($limitgroups)) {
$users = get_users_by_capability($context, 'mod/quiz:attempt', 'u.id', '', '', 1, array_keys($limitgroups)); // Limit to one user for speed
} else {
// empty grouping
}
} else {
$users = get_users_by_capability($context, 'mod/quiz:attempt', 'u.id'); // Limit to one user for speed
}
if (empty($users)) {
// there are no students
echo $OUTPUT->notification(get_string('usersnone', 'quiz'), 'error');
$options['disabled'] = true;
}
echo $OUTPUT->single_button($overrideediturl->out(true, array('action' => 'adduser', 'cmid' => $cm->id)),
get_string('addnewuseroverride', 'quiz'), 'post', $options);
}
echo html_writer::end_tag('div');
echo html_writer::end_tag('div');
// Finish the page
echo $OUTPUT->footer();
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