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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/>.
defined('MOODLE_INTERNAL') OR die('not allowed');
require_once($CFG->dirroot.'/mod/feedback/item/feedback_item_class.php');
class feedback_item_captcha extends feedback_item_base {
protected $type = "captcha";
public function build_editform($item, $feedback, $cm) {
global $DB;
$editurl = new moodle_url('/mod/feedback/edit.php', array('id'=>$cm->id));
// There are no settings for recaptcha.
if (isset($item->id) AND $item->id > 0) {
notice(get_string('there_are_no_settings_for_recaptcha', 'feedback'), $editurl->out());
exit;
}
// Only one recaptcha can be in a feedback.
$params = array('feedback' => $feedback->id, 'typ' => $this->type);
if ($DB->record_exists('feedback_item', $params)) {
notice(get_string('only_one_captcha_allowed', 'feedback'), $editurl->out());
exit;
}
$this->item = $item;
$this->item_form = true; // Dummy.
$lastposition = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));
$this->item->feedback = $feedback->id;
$this->item->template = 0;
$this->item->name = get_string('captcha', 'feedback');
$this->item->label = '';
$this->item->presentation = '';
$this->item->typ = $this->type;
$this->item->hasvalue = $this->get_hasvalue();
$this->item->position = $lastposition + 1;
$this->item->required = 1;
$this->item->dependitem = 0;
$this->item->dependvalue = '';
$this->item->options = '';
}
public function show_editform() {
}
public function is_cancelled() {
return false;
}
public function get_data() {
return true;
}
public function save_item() {
global $DB;
if (!$this->item) {
return false;
}
if (empty($this->item->id)) {
$this->item->id = $DB->insert_record('feedback_item', $this->item);
} else {
$DB->update_record('feedback_item', $this->item);
}
return $DB->get_record('feedback_item', array('id'=>$this->item->id));
}
public function get_printval($item, $value) {
return '';
}
public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
return $itemnr;
}
public function excelprint_item(&$worksheet, $row_offset,
$xls_formats, $item,
$groupid, $courseid = false) {
return $row_offset;
}
/**
* Returns the formatted name of the item for the complete form or response view
*
* @param stdClass $item
* @param bool $withpostfix
* @return string
*/
public function get_display_name($item, $withpostfix = true) {
return get_string('captcha', 'feedback');
}
/**
* Adds an input element to the complete form
*
* @param stdClass $item
* @param mod_feedback_complete_form $form
*/
public function complete_form_element($item, $form) {
$name = $this->get_display_name($item);
$inputname = $item->typ . '_' . $item->id;
if ($form->get_mode() != mod_feedback_complete_form::MODE_COMPLETE) {
// Span to hold the element id. The id is used for drag and drop reordering.
$form->add_form_element($item,
['static', $inputname, $name, html_writer::span('', '', ['id' => 'feedback_item_' . $item->id])],
false,
false);
} else {
// Add recaptcha element that is used during the form validation.
$form->add_form_element($item,
['recaptcha', $inputname . 'recaptcha', $name],
false,
false);
// Add hidden element with value "1" that will be saved in the values table after completion.
$form->add_form_element($item, ['hidden', $inputname, 1], false);
$form->set_element_type($inputname, PARAM_INT);
}
// Add recaptcha validation to the form.
$form->add_validation_rule(function($values, $files) use ($item, $form) {
$elementname = $item->typ . '_' . $item->id . 'recaptcha';
$recaptchaelement = $form->get_form_element($elementname);
if (empty($values['g-recaptcha-response'])) {
return array($elementname => get_string('required'));
} else {
$response = $values['g-recaptcha-response'];
if (true !== ($result = $recaptchaelement->verify($response))) {
return array($elementname => $result);
}
}
return true;
});
}
public function create_value($data) {
global $USER;
return $USER->sesskey;
}
public function get_hasvalue() {
global $CFG;
// Is recaptcha configured in moodle?
if (empty($CFG->recaptchaprivatekey) OR empty($CFG->recaptchapublickey)) {
return 0;
}
return 1;
}
public function can_switch_require() {
return false;
}
/**
* Returns the list of actions allowed on this item in the edit mode
*
* @param stdClass $item
* @param stdClass $feedback
* @param cm_info $cm
* @return action_menu_link[]
*/
public function edit_actions($item, $feedback, $cm) {
$actions = parent::edit_actions($item, $feedback, $cm);
unset($actions['update']);
return $actions;
}
public function get_data_for_external($item) {
global $CFG;
if (empty($CFG->recaptchaprivatekey) || empty($CFG->recaptchapublickey)) {
return null;
}
// With reCAPTCHA v2 the captcha will be rendered by the mobile client using just the publickey.
$data[] = $CFG->recaptchapublickey;
return json_encode($data);
}
/**
* Return the analysis data ready for external functions.
*
* @param stdClass $item the item (question) information
* @param int $groupid the group id to filter data (optional)
* @param int $courseid the course id (optional)
* @return array an array of data with non scalar types json encoded
* @since Moodle 3.3
*/
public function get_analysed_for_external($item, $groupid = false, $courseid = false) {
return [];
}
}