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 * This script allows a teacher to create, edit and delete question categories.
19 *
20 * @package    moodlecore
21 * @subpackage questionbank
22 * @copyright  1999 onwards Martin Dougiamas {@link http://moodle.com}
23 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
24 */
25
26
27require_once("../config.php");
28require_once($CFG->dirroot."/question/editlib.php");
29require_once($CFG->dirroot."/question/category_class.php");
30
31list($thispageurl, $contexts, $cmid, $cm, $module, $pagevars) =
32        question_edit_setup('categories', '/question/category.php');
33
34// Get values from form for actions on this page.
35$param = new stdClass();
36$param->moveup = optional_param('moveup', 0, PARAM_INT);
37$param->movedown = optional_param('movedown', 0, PARAM_INT);
38$param->moveupcontext = optional_param('moveupcontext', 0, PARAM_INT);
39$param->movedowncontext = optional_param('movedowncontext', 0, PARAM_INT);
40$param->tocontext = optional_param('tocontext', 0, PARAM_INT);
41$param->left = optional_param('left', 0, PARAM_INT);
42$param->right = optional_param('right', 0, PARAM_INT);
43$param->delete = optional_param('delete', 0, PARAM_INT);
44$param->confirm = optional_param('confirm', 0, PARAM_INT);
45$param->cancel = optional_param('cancel', '', PARAM_ALPHA);
46$param->move = optional_param('move', 0, PARAM_INT);
47$param->moveto = optional_param('moveto', 0, PARAM_INT);
48$param->edit = optional_param('edit', 0, PARAM_INT);
49
50$url = new moodle_url($thispageurl);
51foreach ((array)$param as $key=>$value) {
52    if (($key !== 'cancel' && $value !== 0) || ($key === 'cancel' && $value !== '')) {
53        $url->param($key, $value);
54    }
55}
56$PAGE->set_url($url);
57
58$qcobject = new question_category_object($pagevars['cpage'], $thispageurl,
59        $contexts->having_one_edit_tab_cap('categories'), $param->edit,
60        $pagevars['cat'], $param->delete, $contexts->having_cap('moodle/question:add'));
61
62if ($param->left || $param->right || $param->moveup || $param->movedown) {
63    require_sesskey();
64
65    foreach ($qcobject->editlists as $list) {
66        // Processing of these actions is handled in the method where appropriate and page redirects.
67        $list->process_actions($param->left, $param->right, $param->moveup, $param->movedown);
68    }
69}
70
71if ($param->moveupcontext || $param->movedowncontext) {
72    require_sesskey();
73
74    if ($param->moveupcontext) {
75        $catid = $param->moveupcontext;
76    } else {
77        $catid = $param->movedowncontext;
78    }
79    $newtopcat = question_get_top_category($param->tocontext);
80    if (!$newtopcat) {
81        print_error('invalidcontext');
82    }
83    $oldcat = $DB->get_record('question_categories', array('id' => $catid), '*', MUST_EXIST);
84    // Log the move to another context.
85    $category = new stdClass();
86    $category->id = explode(',', $pagevars['cat'], -1)[0];
87    $category->contextid = $param->tocontext;
88    $event = \core\event\question_category_moved::create_from_question_category_instance($category);
89    $event->trigger();
90    $qcobject->update_category($catid, "{$newtopcat->id},{$param->tocontext}", $oldcat->name, $oldcat->info);
91    // The previous line does a redirect().
92}
93
94if ($param->delete) {
95    if (!$category = $DB->get_record("question_categories", array("id" => $param->delete))) {
96        print_error('nocate', 'question', $thispageurl->out(), $param->delete);
97    }
98
99    question_remove_stale_questions_from_category($param->delete);
100    $questionstomove = $DB->count_records("question", array("category" => $param->delete));
101
102    // Second pass, if we still have questions to move, setup the form.
103    if ($questionstomove) {
104        $categorycontext = context::instance_by_id($category->contextid);
105        $qcobject->moveform = new question_move_form($thispageurl,
106            array('contexts' => array($categorycontext), 'currentcat' => $param->delete));
107        if ($qcobject->moveform->is_cancelled()) {
108            redirect($thispageurl);
109        } else if ($formdata = $qcobject->moveform->get_data()) {
110            list($tocategoryid, $tocontextid) = explode(',', $formdata->category);
111            $qcobject->move_questions_and_delete_category($formdata->delete, $tocategoryid);
112            $thispageurl->remove_params('cat', 'category');
113            redirect($thispageurl);
114        }
115    }
116} else {
117    $questionstomove = 0;
118}
119
120if ($qcobject->catform->is_cancelled()) {
121    redirect($thispageurl);
122} else if ($catformdata = $qcobject->catform->get_data()) {
123    $catformdata->infoformat = $catformdata->info['format'];
124    $catformdata->info       = $catformdata->info['text'];
125    if (!$catformdata->id) {//new category
126        $qcobject->add_category($catformdata->parent, $catformdata->name,
127                $catformdata->info, false, $catformdata->infoformat, $catformdata->idnumber);
128    } else {
129        $qcobject->update_category($catformdata->id, $catformdata->parent,
130                $catformdata->name, $catformdata->info, $catformdata->infoformat, $catformdata->idnumber);
131    }
132    redirect($thispageurl);
133} else if ((!empty($param->delete) and (!$questionstomove) and confirm_sesskey())) {
134    $qcobject->delete_category($param->delete);//delete the category now no questions to move
135    $thispageurl->remove_params('cat', 'category');
136    redirect($thispageurl);
137}
138
139if ($param->edit) {
140    $PAGE->navbar->add(get_string('editingcategory', 'question'));
141}
142
143$PAGE->set_title(get_string('editcategories', 'question'));
144$PAGE->set_heading($COURSE->fullname);
145echo $OUTPUT->header();
146
147// Print horizontal nav if needed.
148$renderer = $PAGE->get_renderer('core_question', 'bank');
149echo $renderer->extra_horizontal_navigation();
150
151// Display the UI.
152if (!empty($param->edit)) {
153    $qcobject->edit_single_category($param->edit);
154} else if ($questionstomove){
155    $qcobject->display_move_form($questionstomove, $category);
156} else {
157    // Display the user interface.
158    $qcobject->display_user_interface();
159}
160echo $OUTPUT->footer();
161