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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";
private $commonparams;
private $item_form = false;
private $item = false;
private $feedback = false;
public function init() {
}
public function build_editform($item, $feedback, $cm) {
global $DB;
$editurl = new moodle_url('/mod/feedback/edit.php', array('id'=>$cm->id));
//ther 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->feedback = $feedback;
$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 = get_string('captcha', 'feedback');
$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));
}
//liefert eine Struktur ->name, ->data = array(mit Antworten)
public function get_analysed($item, $groupid = false, $courseid = false) {
return null;
}
public function get_printval($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;
}
/**
* print the item at the edit-page of feedback
*
* @global object
* @param object $item
* @return void
*/
public function print_item_preview($item) {
global $DB;
$align = right_to_left() ? 'right' : 'left';
$cmid = 0;
$feedbackid = $item->feedback;
if ($feedbackid > 0) {
$feedback = $DB->get_record('feedback', array('id'=>$feedbackid));
$cm = get_coursemodule_from_instance("feedback", $feedback->id, $feedback->course);
if ($cm) {
$cmid = $cm->id;
}
}
$requiredmark = '<span class="feedback_required_mark">*</span>';
//print the question and label
echo '<div class="feedback_item_label_'.$align.'">';
echo '('.$item->label.') ';
echo format_text($item->name.$requiredmark, true, false, false);
echo '</div>';
}
/**
* print the item at the complete-page of feedback
*
* @global object
* @param object $item
* @param string $value
* @param bool $highlightrequire
* @return void
*/
public function print_item_complete($item, $value = '', $highlightrequire = false) {
global $SESSION, $CFG, $DB, $USER;
require_once($CFG->libdir.'/recaptchalib.php');
$align = right_to_left() ? 'right' : 'left';
$cmid = 0;
$feedbackid = $item->feedback;
if ($feedbackid > 0) {
$feedback = $DB->get_record('feedback', array('id'=>$feedbackid));
$cm = get_coursemodule_from_instance("feedback", $feedback->id, $feedback->course);
if ($cm) {
$cmid = $cm->id;
}
}
//check if an false value even the value is not required
if ($highlightrequire AND !$this->check_value($value, $item)) {
$falsevalue = true;
} else {
$falsevalue = false;
}
if ($falsevalue) {
$highlight = 'missingrequire';
} else {
$highlight = '';
}
$requiredmark = '<span class="feedback_required_mark">*</span>';
if (isset($SESSION->feedback->captchacheck) AND
$SESSION->feedback->captchacheck == $USER->sesskey AND
$value == $USER->sesskey) {
//print the question and label
echo '<div class="feedback_item_label_'.$align.'">';
echo '('.$item->label.') ';
echo format_text($item->name.$requiredmark, true, false, false);
$inputname = 'name="'.$item->typ.'_'.$item->id.'"';
echo '<input type="hidden" value="'.$USER->sesskey.'" '.$inputname.' />';
echo '</div>';
return;
}
$strincorrectpleasetryagain = get_string('incorrectpleasetryagain', 'auth');
$strenterthewordsabove = get_string('enterthewordsabove', 'auth');
$strenterthenumbersyouhear = get_string('enterthenumbersyouhear', 'auth');
$strgetanothercaptcha = get_string('getanothercaptcha', 'auth');
$strgetanaudiocaptcha = get_string('getanaudiocaptcha', 'auth');
$strgetanimagecaptcha = get_string('getanimagecaptcha', 'auth');
$recaptureoptions = Array('theme'=>'custom', 'custom_theme_widget'=>'recaptcha_widget');
$html = html_writer::script(js_writer::set_variable('RecaptchaOptions', $recaptureoptions));
$html .= '
<div class="'.$highlight.'" id="recaptcha_widget" style="display:none">
<div id="recaptcha_image"></div>
<div class="recaptcha_only_if_incorrect_sol" style="color:red">'.
$strincorrectpleasetryagain.
'</div>
<span class="recaptcha_only_if_image">
<label for="recaptcha_response_field">'.$strenterthewordsabove.$requiredmark.'</label>
</span>
<span class="recaptcha_only_if_audio">
<label for="recaptcha_response_field">'.$strenterthenumbersyouhear.'</label>
</span>
<input type="text" id="recaptcha_response_field" name="'.$item->typ.'_'.$item->id.'" />
<div><a href="javascript:Recaptcha.reload()">' . $strgetanothercaptcha . '</a></div>
<div class="recaptcha_only_if_image">
<a href="javascript:Recaptcha.switch_type(\'audio\')">' . $strgetanaudiocaptcha . '</a>
</div>
<div class="recaptcha_only_if_audio">
<a href="javascript:Recaptcha.switch_type(\'image\')">' . $strgetanimagecaptcha . '</a>
</div>
</div>';
//we have to rename the challengefield
if (!empty($CFG->recaptchaprivatekey) AND !empty($CFG->recaptchapublickey)) {
$captchahtml = recaptcha_get_html($CFG->recaptchapublickey, null);
echo $html.$captchahtml;
}
}
/**
* print the item at the complete-page of feedback
*
* @global object
* @param object $item
* @param string $value
* @return void
*/
public function print_item_show_value($item, $value = '') {
global $DB;
$align = right_to_left() ? 'right' : 'left';
$cmid = 0;
$feedbackid = $item->feedback;
if ($feedbackid > 0) {
$feedback = $DB->get_record('feedback', array('id'=>$feedbackid));
if ($cm = get_coursemodule_from_instance("feedback", $feedback->id, $feedback->course)) {
$cmid = $cm->id;
}
}
$requiredmark = '<span class="feedback_required_mark">*</span>';
//print the question and label
echo '<div class="feedback_item_label_'.$align.'">';
echo '('.$item->label.') ';
echo format_text($item->name.$requiredmark, true, false, false);
echo '</div>';
}
public function check_value($value, $item) {
global $SESSION, $CFG, $USER;
require_once($CFG->libdir.'/recaptchalib.php');
//is recaptcha configured in moodle?
if (empty($CFG->recaptchaprivatekey) OR empty($CFG->recaptchapublickey)) {
return true;
}
$challenge = optional_param('recaptcha_challenge_field', '', PARAM_RAW);
if ($value == $USER->sesskey AND $challenge == '') {
return true;
}
$remoteip = getremoteaddr(null);
$response = recaptcha_check_answer($CFG->recaptchaprivatekey, $remoteip, $challenge, $value);
if ($response->is_valid) {
$SESSION->feedback->captchacheck = $USER->sesskey;
return true;
}
unset($SESSION->feedback->captchacheck);
return false;
}
public function create_value($data) {
global $USER;
return $USER->sesskey;
}
//compares the dbvalue with the dependvalue
//dbvalue is value stored in the db
//dependvalue is the value to check
public function compare_value($item, $dbvalue, $dependvalue) {
if ($dbvalue == $dependvalue) {
return true;
}
return false;
}
public function get_presentation($data) {
return '';
}
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;
}
}
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