edit_config.php

<?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/>.

require __DIR__ . '/inc.php';
require_once $CFG->dirroot . '/lib/datalib.php';

$courseid = required_param('courseid', PARAM_INT);
$action = optional_param('action', "", PARAM_ALPHA);
$fromimport = optional_param('fromimport', 0, PARAM_INT);

if (!$course = $DB->get_record('course', array(
    'id' => $courseid,
))) {
    print_error('invalidcourse', 'block_simplehtml', $courseid);
}

require_login($course);

$context = context_system::instance();
block_exacomp_require_admin($context);

// you need to first have some data, so redirect to import if there is no data. If you MANUALLY created a subject, you should be allowed to create taxonomies though, so not has_imported_data but has_any_subjects
$check = block_exacomp\data::has_any_subjects(); // todo: what are the taxonomies even really? where are they used? might need a different check
if (!$check) {
    redirect(new moodle_url ('/blocks/exacomp/import.php', array(
        'courseid' => $courseid,
    )));
}

/* PAGE IDENTIFIER - MUST BE CHANGED. Please use string identifier from lang file */
$page_identifier = 'tab_admin_configuration';

/* PAGE URL - MUST BE CHANGED */
$PAGE->set_url('/blocks/exacomp/edit_config.php', array(
    'courseid' => $courseid,
));
$PAGE->set_heading(block_exacomp_get_string('blocktitle'));
$PAGE->set_title(block_exacomp_get_string($page_identifier));

// build breadcrumbs navigation
block_exacomp_build_breadcrum_navigation($courseid);

if ($fromimport == 1) {
    $img = 'two_admin.png';
} else {
    $img = 'one_admin.png';
}

// Falls Formular abgesendet, speichern
if (isset ($action) && $action == 'save') {
    require_sesskey();
    $values = optional_param_array('data', array(), PARAM_INT);
    block_exacomp_set_mdltype($values);
    block_exacomp_set_schooltype_disabled(optional_param_array('disable', array(), PARAM_INT));

    if (!isset ($_POST['data'])) {
        $headertext = block_exacomp_get_string('tick_some');
    } else {
        $string = block_exacomp_get_string('next_step');

        $url = 'edit_course.php';

        $headertext = html_writer::div(block_exacomp_get_string("save_success"), 'alert alert-success')
            . html_writer::empty_tag('img', array(
                'src' => new moodle_url ('/blocks/exacomp/pix/' . $img),
                'alt' => '',
                'width' => '60px',
                'height' => '60px',
            )) . html_writer::link(new moodle_url ($url, array(
                'courseid' => $courseid,
            )), $string);
    }
} else {
    $headertext = html_writer::empty_tag('img', array(
            'src' => new moodle_url ('/blocks/exacomp/pix/' . $img),
            'alt' => '',
            'width' => '60px',
            'height' => '60px',
        )) . block_exacomp_get_string('second_configuration_step') . html_writer::empty_tag('br') . block_exacomp_get_string("explainconfig");
}

// build tab navigation & print header
$output = block_exacomp_get_renderer();
echo $output->header($context, $courseid, 'tab_admin_settings');
echo $OUTPUT->tabtree(block_exacomp_build_navigation_tabs_admin_settings($courseid), $page_identifier);

/* CONTENT REGION */

if (block_exacomp_is_skillsmanagement()) {
    echo $output->notification(block_exacomp_trans('en:This settings is not available in skillsmanagement mode!'));
    echo $output->footer();
    exit;
}

/* HTML CONTENT */

$data = new stdClass ();
$data->headertext = $headertext;
$data->levels = array();

$levels = block_exacomp_get_edulevels();
foreach ($levels as $level) {
    $data->levels[$level->id] = new stdClass ();
    $data->levels[$level->id]->level = $level;
    $data->levels[$level->id]->schooltypes = array();

    $types = block_exacomp_get_schooltypes($level->id);

    foreach ($types as $type) {
        $ticked = block_exacomp_get_mdltypes($type->id);

        $data->levels[$level->id]->schooltypes[$type->id] = new stdClass ();
        $data->levels[$level->id]->schooltypes[$type->id]->schooltype = $type;
        $data->levels[$level->id]->schooltypes[$type->id]->ticked = $ticked;
    }
}

echo $output->edit_config($data, $courseid, $fromimport);

/* END CONTENT REGION */
echo $output->footer();