Proyectos de Subversion Moodle

<?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 [];

    }

}