moodle-mod-customcert/element/teachername/classes/element.php

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<?php
// This file is part of the customcert module for 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/>.
namespace customcertelement_teachername;
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defined('MOODLE_INTERNAL') || die();
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/**
* The customcert element teachername's core interaction API.
*
* @package customcertelement_teachername
* @copyright 2013 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class element extends \mod_customcert\element {
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/**
* This function renders the form elements when adding a customcert element.
*
* @param \mod_customcert_edit_element_form $mform the edit_form instance
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*/
public function render_form_elements($mform) {
$mform->addElement('select', 'teacher', get_string('teacher', 'customcertelement_teachername'),
$this->get_list_of_teachers());
$mform->addHelpButton('teacher', 'teacher', 'customcertelement_teachername');
parent::render_form_elements($mform);
}
/**
* This will handle how form data will be saved into the data column in the
* customcert_elements table.
*
* @param \stdClass $data the form data
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* @return string the text
*/
public function save_unique_data($data) {
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if (!empty($data->teacher)) {
return $data->teacher;
}
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}
/**
* Handles rendering the element on the pdf.
*
* @param \pdf $pdf the pdf object
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* @param bool $preview true if it is a preview, false otherwise
*/
public function render($pdf, $preview) {
global $DB;
$teacher = $DB->get_record('user', array('id' => $this->element->data));
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$teachername = fullname($teacher);
parent::render_content($pdf, $teachername);
}
/**
* Render the element in html.
*
* This function is used to render the element when we are using the
* drag and drop interface to position it.
*/
public function render_html() {
global $DB;
$teacher = $DB->get_record('user', array('id' => $this->element->data));
$teachername = fullname($teacher);
return parent::render_html_content($teachername);
}
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/**
* Helper function to return the teachers for this course.
*
* @return array the list of teachers
*/
private function get_list_of_teachers() {
// When editing this element the cmid will be present in the URL.
$cmid = required_param('cmid', PARAM_INT);
// The list of teachers to return.
$teachers = array();
// Now return all users who can manage the customcert in this context.
if ($users = get_users_by_capability(\context_module::instance($cmid), 'mod/customcert:manage')) {
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foreach ($users as $user) {
$teachers[$user->id] = fullname($user);
}
}
return $teachers;
}
/**
* Sets the data on the form when editing an element.
*
* @param \mod_customcert_edit_element_form $mform the edit_form instance
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*/
public function definition_after_data($mform) {
if (!empty($this->element->data)) {
$this->element->teacher = $this->element->data;
}
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parent::definition_after_data($mform);
}
}