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// This file is part of Moodle - http://moodle.org/
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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* Defines classes used for plugin info.
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* @copyright 2011 David Mudrak <david@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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namespace core\plugininfo;
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use moodle_url, part_of_admin_tree, admin_settingpage, core_plugin_manager;
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defined('MOODLE_INTERNAL') || die();
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* Class for question types
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class qtype extends base {
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* Finds all enabled plugins, the result may include missing plugins.
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* @return array|null of enabled plugins $pluginname=>$pluginname, null means unknown
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public static function get_enabled_plugins() {
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$plugins = core_plugin_manager::instance()->get_installed_plugins('qtype');
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foreach ($plugins as $plugin => $version) {
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$installed[] = $plugin.'_disabled';
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list($installed, $params) = $DB->get_in_or_equal($installed, SQL_PARAMS_NAMED);
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$disabled = $DB->get_records_select('config_plugins', "name $installed AND plugin = 'question'", $params, 'plugin ASC');
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foreach ($disabled as $conf) {
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if (empty($conf->value)) {
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$name = substr($conf->name, 0, -9);
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unset($plugins[$name]);
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foreach ($plugins as $plugin => $version) {
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$enabled[$plugin] = $plugin;
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public function is_uninstall_allowed() {
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if ($this->name === 'missingtype') {
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// qtype_missingtype is used by the system. It cannot be uninstalled.
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return !$DB->record_exists('question', array('qtype' => $this->name));
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* Return URL used for management of plugins of this type.
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public static function get_manage_url() {
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return new moodle_url('/admin/qtypes.php');
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* This is intended for disabling of plugin, some DB table purging, etc.
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* NOTE: to be called from uninstall_plugin() only.
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public function uninstall_cleanup() {
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// Delete any question configuration records mentioning this plugin.
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unset_config($this->name . '_disabled', 'question');
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unset_config($this->name . '_sortorder', 'question');
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parent::uninstall_cleanup();
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public function get_settings_section_name() {
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return 'qtypesetting' . $this->name;
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public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
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global $CFG, $USER, $DB, $OUTPUT, $PAGE; // In case settings.php wants to refer to them.
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$ADMIN = $adminroot; // May be used in settings.php.
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$plugininfo = $this; // Also can be used inside settings.php.
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$qtype = $this; // Also can be used inside settings.php.
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if (!$this->is_installed_and_upgraded()) {
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$section = $this->get_settings_section_name();
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$systemcontext = \context_system::instance();
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if (($hassiteconfig || has_capability('moodle/question:config', $systemcontext)) &&
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file_exists($this->full_path('settings.php'))) {
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$settings = new admin_settingpage($section, $this->displayname,
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'moodle/question:config', $this->is_enabled() === false);
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include($this->full_path('settings.php')); // This may also set $settings to null.
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$ADMIN->add($parentnodename, $settings);