forked from moodle/moodle
-
Notifications
You must be signed in to change notification settings - Fork 0
/
preview.php
222 lines (190 loc) · 8.33 KB
/
preview.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
<?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 displays a preview of a question
*
* The preview uses the option settings from the activity within which the question
* is previewed or the default settings if no activity is specified. The question session
* information is stored in the session as an array of subsequent states rather
* than in the database.
*
* @package moodlecore
* @subpackage questionengine
* @copyright Alex Smith {@link http://maths.york.ac.uk/serving_maths} and
* numerous contributors.
* @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(dirname(__FILE__) . '/previewlib.php');
// Get and validate question id.
$id = required_param('id', PARAM_INT);
$question = question_bank::load_question($id);
require_login();
$category = $DB->get_record('question_categories',
array('id' => $question->category), '*', MUST_EXIST);
question_require_capability_on($question, 'use');
$PAGE->set_pagelayout('popup');
$PAGE->set_context(get_context_instance_by_id($category->contextid));
// Get and validate display options.
$maxvariant = $question->get_num_variants();
$options = new question_preview_options($question);
$options->load_user_defaults();
$options->set_from_request();
$PAGE->set_url(question_preview_url($id, $options->behaviour, $options->maxmark, $options));
// Get and validate exitsing preview, or start a new one.
$previewid = optional_param('previewid', 0, PARAM_INT);
if ($previewid) {
if (!isset($SESSION->question_previews[$previewid])) {
print_error('notyourpreview', 'question');
}
try {
$quba = question_engine::load_questions_usage_by_activity($previewid);
} catch (Exception $e) {
print_error('submissionoutofsequencefriendlymessage', 'question',
question_preview_url($question->id, $options->behaviour,
$options->maxmark, $options), null, $e);
}
$slot = $quba->get_first_question_number();
$usedquestion = $quba->get_question($slot);
if ($usedquestion->id != $question->id) {
print_error('questionidmismatch', 'question');
}
$question = $usedquestion;
$options->variant = $quba->get_variant($slot);
} else {
$quba = question_engine::make_questions_usage_by_activity('core_question_preview',
get_context_instance_by_id($category->contextid));
$quba->set_preferred_behaviour($options->behaviour);
$slot = $quba->add_question($question, $options->maxmark);
if ($options->variant) {
$options->variant = min($maxvariant, max(1, $options->variant));
} else {
$options->variant = rand(1, $maxvariant);
}
$quba->start_question($slot, $options->variant);
$transaction = $DB->start_delegated_transaction();
question_engine::save_questions_usage_by_activity($quba);
$transaction->allow_commit();
$SESSION->question_previews[$quba->get_id()] = true;
}
$options->behaviour = $quba->get_preferred_behaviour();
$options->maxmark = $quba->get_question_max_mark($slot);
// Create the settings form, and initialise the fields.
$optionsform = new preview_options_form(new moodle_url('/question/preview.php',
array('id' => $question->id)), array('quba' => $quba, 'maxvariant' => $maxvariant));
$optionsform->set_data($options);
// Process change of settings, if that was requested.
if ($newoptions = $optionsform->get_submitted_data()) {
// Set user preferences
$options->save_user_preview_options($newoptions);
if (!isset($newoptions->variant)) {
$newoptions->variant = $options->variant;
}
restart_preview($previewid, $question->id, $newoptions);
}
// Prepare a URL that is used in various places.
$actionurl = question_preview_action_url($question->id, $quba->get_id(), $options);
// Process any actions from the buttons at the bottom of the form.
if (data_submitted() && confirm_sesskey()) {
if (optional_param('restart', false, PARAM_BOOL)) {
restart_preview($previewid, $question->id, $options);
} else if (optional_param('fill', null, PARAM_BOOL)) {
$correctresponse = $quba->get_correct_response($slot);
$quba->process_action($slot, $correctresponse);
$transaction = $DB->start_delegated_transaction();
question_engine::save_questions_usage_by_activity($quba);
$transaction->allow_commit();
redirect($actionurl);
} else if (optional_param('finish', null, PARAM_BOOL)) {
try {
$quba->process_all_actions();
} catch (question_out_of_sequence_exception $e) {
print_error('submissionoutofsequencefriendlymessage', 'question', $actionurl);
}
$quba->finish_all_questions();
$transaction = $DB->start_delegated_transaction();
question_engine::save_questions_usage_by_activity($quba);
$transaction->allow_commit();
redirect($actionurl);
} else {
try {
$quba->process_all_actions();
} catch (question_out_of_sequence_exception $e) {
print_error('submissionoutofsequencefriendlymessage', 'question', $actionurl);
}
$transaction = $DB->start_delegated_transaction();
question_engine::save_questions_usage_by_activity($quba);
$transaction->allow_commit();
$scrollpos = optional_param('scrollpos', '', PARAM_RAW);
if ($scrollpos !== '') {
$actionurl->param('scrollpos', (int) $scrollpos);
}
redirect($actionurl);
}
}
if ($question->length) {
$displaynumber = '1';
} else {
$displaynumber = 'i';
}
$restartdisabled = '';
$finishdisabled = '';
$filldisabled = '';
if ($quba->get_question_state($slot)->is_finished()) {
$finishdisabled = ' disabled="disabled"';
$filldisabled = ' disabled="disabled"';
}
if (!$previewid) {
$restartdisabled = ' disabled="disabled"';
}
// Output
$title = get_string('previewquestion', 'question', format_string($question->name));
$headtags = question_engine::initialise_js() . $quba->render_question_head_html($slot);
$PAGE->set_title($title);
$PAGE->set_heading($title);
echo $OUTPUT->header();
// Start the question form.
echo '<form method="post" action="' . $actionurl .
'" enctype="multipart/form-data" id="responseform">', "\n";
echo '<input type="hidden" name="sesskey" value="' . sesskey() . '" />', "\n";
echo '<input type="hidden" name="slots" value="' . $slot . '" />', "\n";
// Output the question.
echo $quba->render_question($slot, $options, $displaynumber);
echo '<p class="notifytiny">' . get_string('behaviourbeingused', 'question',
question_engine::get_behaviour_name(
$quba->get_question_attempt($slot)->get_behaviour_name())) . '</p>';
// Finish the question form.
echo '<div id="previewcontrols" class="controls">';
echo '<input type="submit" name="restart"' . $restartdisabled .
' value="' . get_string('restart', 'question') . '" />', "\n";
echo '<input type="submit" name="fill"' . $filldisabled .
' value="' . get_string('fillincorrect', 'question') . '" />', "\n";
echo '<input type="submit" name="finish"' . $finishdisabled .
' value="' . get_string('submitandfinish', 'question') . '" />', "\n";
echo '<input type="hidden" name="scrollpos" id="scrollpos" value="" />';
echo '</div>';
echo '</form>';
// Display the settings form.
$optionsform->display();
$PAGE->requires->js_init_call('M.core_question_preview.init', null, false, array(
'name' => 'core_question_preview',
'fullpath' => '/question/preview.js',
'requires' => array('base', 'dom', 'event-delegate', 'event-key', 'core_question_engine'),
'strings' => array(
array('closepreview', 'question'),
)));
echo $OUTPUT->footer();