source: moodle/trunk/fuentes/lib/classes/plugininfo/qtype.php @ 1331

Last change on this file since 1331 was 136, checked in by mabarracus, 4 years ago

Ported code to xenial

File size: 4.4 KB
Line 
1<?php
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
17/**
18 * Defines classes used for plugin info.
19 *
20 * @package    core
21 * @copyright  2011 David Mudrak <david@moodle.com>
22 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24namespace core\plugininfo;
25
26use moodle_url, part_of_admin_tree, admin_settingpage, core_plugin_manager;
27
28defined('MOODLE_INTERNAL') || die();
29
30/**
31 * Class for question types
32 */
33class qtype extends base {
34    /**
35     * Finds all enabled plugins, the result may include missing plugins.
36     * @return array|null of enabled plugins $pluginname=>$pluginname, null means unknown
37     */
38    public static function get_enabled_plugins() {
39        global $DB;
40
41        $plugins = core_plugin_manager::instance()->get_installed_plugins('qtype');
42        if (!$plugins) {
43            return array();
44        }
45        $installed = array();
46        foreach ($plugins as $plugin => $version) {
47            $installed[] = $plugin.'_disabled';
48        }
49
50        list($installed, $params) = $DB->get_in_or_equal($installed, SQL_PARAMS_NAMED);
51        $disabled = $DB->get_records_select('config_plugins', "name $installed AND plugin = 'question'", $params, 'plugin ASC');
52        foreach ($disabled as $conf) {
53            if (empty($conf->value)) {
54                continue;
55            }
56            $name = substr($conf->name, 0, -9);
57            unset($plugins[$name]);
58        }
59
60        $enabled = array();
61        foreach ($plugins as $plugin => $version) {
62            $enabled[$plugin] = $plugin;
63        }
64
65        return $enabled;
66    }
67
68    public function is_uninstall_allowed() {
69        global $DB;
70
71        if ($this->name === 'missingtype') {
72            // qtype_missingtype is used by the system. It cannot be uninstalled.
73            return false;
74        }
75
76        return !$DB->record_exists('question', array('qtype' => $this->name));
77    }
78
79    /**
80     * Return URL used for management of plugins of this type.
81     * @return moodle_url
82     */
83    public static function get_manage_url() {
84        return new moodle_url('/admin/qtypes.php');
85    }
86
87    /**
88     * Pre-uninstall hook.
89     *
90     * This is intended for disabling of plugin, some DB table purging, etc.
91     *
92     * NOTE: to be called from uninstall_plugin() only.
93     * @private
94     */
95    public function uninstall_cleanup() {
96        // Delete any question configuration records mentioning this plugin.
97        unset_config($this->name . '_disabled', 'question');
98        unset_config($this->name . '_sortorder', 'question');
99
100        parent::uninstall_cleanup();
101    }
102
103    public function get_settings_section_name() {
104        return 'qtypesetting' . $this->name;
105    }
106
107    public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
108        global $CFG, $USER, $DB, $OUTPUT, $PAGE; // In case settings.php wants to refer to them.
109        $ADMIN = $adminroot; // May be used in settings.php.
110        $plugininfo = $this; // Also can be used inside settings.php.
111        $qtype = $this;      // Also can be used inside settings.php.
112
113        if (!$this->is_installed_and_upgraded()) {
114            return;
115        }
116
117        $section = $this->get_settings_section_name();
118
119        $settings = null;
120        $systemcontext = \context_system::instance();
121        if (($hassiteconfig || has_capability('moodle/question:config', $systemcontext)) &&
122            file_exists($this->full_path('settings.php'))) {
123            $settings = new admin_settingpage($section, $this->displayname,
124                'moodle/question:config', $this->is_enabled() === false);
125            include($this->full_path('settings.php')); // This may also set $settings to null.
126        }
127        if ($settings) {
128            $ADMIN->add($parentnodename, $settings);
129        }
130    }
131}
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