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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/>.
/**
* Allows the admin to manage question types.
*
* @package moodlecore
* @subpackage questionbank
* @copyright 2008 Tim Hunt
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(__FILE__) . '/../config.php');
require_once($CFG->libdir . '/questionlib.php');
require_once($CFG->libdir . '/adminlib.php');
require_once($CFG->libdir . '/pluginlib.php');
require_once($CFG->libdir . '/tablelib.php');
// Check permissions.
require_login();
$systemcontext = context_system::instance();
require_capability('moodle/question:config', $systemcontext);
$canviewreports = has_capability('report/questioninstances:view', $systemcontext);
admin_externalpage_setup('manageqtypes');
$thispageurl = new moodle_url('/admin/qtypes.php');
$qtypes = question_bank::get_all_qtypes();
$pluginmanager = plugin_manager::instance();
// Get some data we will need - question counts and which types are needed.
$counts = $DB->get_records_sql("
SELECT qtype, COUNT(1) as numquestions, SUM(hidden) as numhidden
FROM {question} GROUP BY qtype", array());
$needed = array();
foreach ($qtypes as $qtypename => $qtype) {
if (!isset($counts[$qtypename])) {
$counts[$qtypename] = new stdClass;
$counts[$qtypename]->numquestions = 0;
$counts[$qtypename]->numhidden = 0;
}
$needed[$qtypename] = $counts[$qtypename]->numquestions > 0 ||
$pluginmanager->other_plugins_that_require($qtype->plugin_name());
$counts[$qtypename]->numquestions -= $counts[$qtypename]->numhidden;
}
$needed['missingtype'] = true; // The system needs the missing question type.
foreach ($counts as $qtypename => $count) {
if (!isset($qtypes[$qtypename])) {
$counts['missingtype']->numquestions += $count->numquestions - $count->numhidden;
$counts['missingtype']->numhidden += $count->numhidden;
}
}
// Work of the correct sort order.
$config = get_config('question');
$sortedqtypes = array();
foreach ($qtypes as $qtypename => $qtype) {
$sortedqtypes[$qtypename] = $qtype->local_name();
}
$sortedqtypes = question_bank::sort_qtype_array($sortedqtypes, $config);
// Process actions ============================================================
// Disable.
if (($disable = optional_param('disable', '', PARAM_PLUGIN)) && confirm_sesskey()) {
if (!isset($qtypes[$disable])) {
print_error('unknownquestiontype', 'question', $thispageurl, $disable);
}
set_config($disable . '_disabled', 1, 'question');
redirect($thispageurl);
}
// Enable.
if (($enable = optional_param('enable', '', PARAM_PLUGIN)) && confirm_sesskey()) {
if (!isset($qtypes[$enable])) {
print_error('unknownquestiontype', 'question', $thispageurl, $enable);
}
if (!$qtypes[$enable]->menu_name()) {
print_error('cannotenable', 'question', $thispageurl, $enable);
}
unset_config($enable . '_disabled', 'question');
redirect($thispageurl);
}
// Move up in order.
if (($up = optional_param('up', '', PARAM_PLUGIN)) && confirm_sesskey()) {
if (!isset($qtypes[$up])) {
print_error('unknownquestiontype', 'question', $thispageurl, $up);
}
$neworder = question_reorder_qtypes($sortedqtypes, $up, -1);
question_save_qtype_order($neworder, $config);
redirect($thispageurl);
}
// Move down in order.
if (($down = optional_param('down', '', PARAM_PLUGIN)) && confirm_sesskey()) {
if (!isset($qtypes[$down])) {
print_error('unknownquestiontype', 'question', $thispageurl, $down);
}
$neworder = question_reorder_qtypes($sortedqtypes, $down, +1);
question_save_qtype_order($neworder, $config);
redirect($thispageurl);
}
// Delete.
if (($delete = optional_param('delete', '', PARAM_PLUGIN)) && confirm_sesskey()) {
// Check it is OK to delete this question type.
if ($delete == 'missingtype') {
print_error('cannotdeletemissingqtype', 'question', $thispageurl);
}
if (!isset($qtypes[$delete])) {
print_error('unknownquestiontype', 'question', $thispageurl, $delete);
}
$qtypename = $qtypes[$delete]->local_name();
if ($counts[$delete]->numquestions + $counts[$delete]->numhidden > 0) {
print_error('cannotdeleteqtypeinuse', 'question', $thispageurl, $qtypename);
}
if ($needed[$delete] > 0) {
print_error('cannotdeleteqtypeneeded', 'question', $thispageurl, $qtypename);
}
// If not yet confirmed, display a confirmation message.
if (!optional_param('confirm', '', PARAM_BOOL)) {
$qtypename = $qtypes[$delete]->local_name();
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('deleteqtypeareyousure', 'question', $qtypename));
echo $OUTPUT->confirm(get_string('deleteqtypeareyousuremessage', 'question', $qtypename),
new moodle_url($thispageurl, array('delete' => $delete, 'confirm' => 1)),
$thispageurl);
echo $OUTPUT->footer();
exit;
}
// Do the deletion.
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('deletingqtype', 'question', $qtypename));
// Delete any configuration records.
if (!unset_all_config_for_plugin('qtype_' . $delete)) {
echo $OUTPUT->notification(get_string('errordeletingconfig', 'admin', 'qtype_' . $delete));
}
unset_config($delete . '_disabled', 'question');
unset_config($delete . '_sortorder', 'question');
// Then the tables themselves
drop_plugin_tables($delete, $qtypes[$delete]->plugin_dir() . '/db/install.xml', false);
// Remove event handlers and dequeue pending events
events_uninstall('qtype_' . $delete);
$a = new stdClass();
$a->qtype = $qtypename;
$a->directory = $qtypes[$delete]->plugin_dir();
echo $OUTPUT->box(get_string('qtypedeletefiles', 'question', $a), 'generalbox', 'notice');
echo $OUTPUT->continue_button($thispageurl);
echo $OUTPUT->footer();
exit;
}
// End of process actions ==================================================
// Print the page heading.
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('manageqtypes', 'admin'));
// Set up the table.
$table = new flexible_table('qtypeadmintable');
$table->define_baseurl($thispageurl);
$table->define_columns(array('questiontype', 'numquestions', 'version', 'requires',
'availableto', 'delete', 'settings'));
$table->define_headers(array(get_string('questiontype', 'question'), get_string('numquestions', 'question'),
get_string('version'), get_string('requires', 'admin'), get_string('availableq', 'question'),
get_string('delete'), get_string('settings')));
$table->set_attribute('id', 'qtypes');
$table->set_attribute('class', 'generaltable generalbox boxaligncenter boxwidthwide');
$table->setup();
// Add a row for each question type.
$createabletypes = question_bank::get_creatable_qtypes();
foreach ($sortedqtypes as $qtypename => $localname) {
$qtype = $qtypes[$qtypename];
$row = array();
// Question icon and name.
$fakequestion = new stdClass;
$fakequestion->qtype = $qtypename;
$icon = print_question_icon($fakequestion, true);
$row[] = $icon . ' ' . $localname;
// Number of questions of this type.
if ($counts[$qtypename]->numquestions + $counts[$qtypename]->numhidden > 0) {
if ($counts[$qtypename]->numhidden > 0) {
$strcount = get_string('numquestionsandhidden', 'question', $counts[$qtypename]);
} else {
$strcount = $counts[$qtypename]->numquestions;
}
if ($canviewreports) {
$row[] = html_writer::link(new moodle_url('/report/questioninstances/index.php',
array('qtype' => $qtypename)), $strcount, array('title' => get_string('showdetails', 'admin')));
} else {
$strcount;
}
} else {
$row[] = 0;
}
// Question version number.
$version = get_config('qtype_' . $qtypename, 'version');
if ($version) {
$row[] = $version;
} else {
$row[] = html_writer::tag('span', get_string('nodatabase', 'admin'), array('class' => 'disabled'));
}
// Other question types required by this one.
$plugin = $pluginmanager->get_plugin_info($qtype->plugin_name());
$requiredtypes = $plugin->get_other_required_plugins();
$strtypes = array();
if (!empty($requiredtypes)) {
foreach ($requiredtypes as $required => $notused) {
$strtypes[] = $pluginmanager->plugin_name($required);
}
$row[] = implode(', ', $strtypes);
} else {
$row[] = '';
}
// Are people allowed to create new questions of this type?
$rowclass = '';
if ($qtype->menu_name()) {
$createable = isset($createabletypes[$qtypename]);
$icons = question_types_enable_disable_icons($qtypename, $createable);
if (!$createable) {
$rowclass = 'dimmed_text';
}
} else {
$icons = $OUTPUT->spacer() . ' ';
}
// Move icons.
$icons .= question_type_icon_html('up', $qtypename, 't/up', get_string('up'), '');
$icons .= question_type_icon_html('down', $qtypename, 't/down', get_string('down'), '');
$row[] = $icons;
// Delete link, if available.
if ($needed[$qtypename]) {
$row[] = '';
} else {
$row[] = html_writer::link(new moodle_url($thispageurl,
array('delete' => $qtypename, 'sesskey' => sesskey())), get_string('delete'),
array('title' => get_string('uninstallqtype', 'question')));
}
// Settings link, if available.
$settings = admin_get_root()->locate('qtypesetting' . $qtypename);
if ($settings instanceof admin_externalpage) {
$row[] = html_writer::link($settings->url, get_string('settings'));
} else if ($settings instanceof admin_settingpage) {
$row[] = html_writer::link(new moodle_url('/admin/settings.php',
array('section' => 'qtypesetting' . $qtypename)), get_string('settings'));
} else {
$row[] = '';
}
$table->add_data($row, $rowclass);
}
$table->finish_output();
echo $OUTPUT->footer();
function question_types_enable_disable_icons($qtypename, $createable) {
if ($createable) {
return question_type_icon_html('disable', $qtypename, 'i/hide',
get_string('enabled', 'question'), get_string('disable'));
} else {
return question_type_icon_html('enable', $qtypename, 'i/show',
get_string('disabled', 'question'), get_string('enable'));
}
}
function question_type_icon_html($action, $qtypename, $icon, $alt, $tip) {
global $OUTPUT;
return $OUTPUT->action_icon(new moodle_url('/admin/qtypes.php',
array($action => $qtypename, 'sesskey' => sesskey())),
new pix_icon($icon, $alt, 'moodle', array('title' => '')),
null, array('title' => $tip)) . ' ';
}
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