<?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/>.

/**
 * This file is used to display a categories sub categories, external pages, and settings.
 *
 * @since      2.3
 * @package    admin
 * @copyright  2011 Sam Hemelryk
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once('../config.php');
require_once($CFG->libdir.'/adminlib.php');

$category = required_param('category', PARAM_SAFEDIR);
$return = optional_param('return','', PARAM_ALPHA);
$adminediting = optional_param('adminedit', -1, PARAM_BOOL);

/// no guest autologin
require_login(0, false);
$PAGE->set_context(context_system::instance());
$PAGE->set_url('/admin/category.php', array('category' => $category));
$PAGE->set_pagetype('admin-setting-' . $category);
$PAGE->set_pagelayout('admin');
$PAGE->navigation->clear_cache();

$adminroot = admin_get_root(); // need all settings
$settingspage = $adminroot->locate($category, true);

if (empty($settingspage) or !($settingspage instanceof admin_category)) {
    print_error('categoryerror', 'admin', "$CFG->wwwroot/$CFG->admin/");
}

if (!($settingspage->check_access())) {
    print_error('accessdenied', 'admin');
}


$statusmsg = '';
$errormsg  = '';

if ($data = data_submitted() and confirm_sesskey()) {
    if (admin_write_settings($data)) {
        $statusmsg = get_string('changessaved');
    }

    if (empty($adminroot->errors)) {
        switch ($return) {
            case 'site': redirect("$CFG->wwwroot/");
            case 'admin': redirect("$CFG->wwwroot/$CFG->admin/");
        }
    } else {
        $errormsg = get_string('errorwithsettings', 'admin');
        $firsterror = reset($adminroot->errors);
    }
    $adminroot = admin_get_root(true); //reload tree
    $settingspage = $adminroot->locate($category, true);
}

if ($PAGE->user_allowed_editing() && $adminediting != -1) {
    $USER->editing = $adminediting;
}

if ($PAGE->user_allowed_editing()) {
    $url = clone($PAGE->url);
    if ($PAGE->user_is_editing()) {
        $caption = get_string('blockseditoff');
        $url->param('adminedit', 'off');
    } else {
        $caption = get_string('blocksediton');
        $url->param('adminedit', 'on');
    }
    $buttons = $OUTPUT->single_button($url, $caption, 'get');
}

$savebutton = false;
$outputhtml = '';
foreach ($settingspage->children as $childpage) {
    if ($childpage->is_hidden()) {
        continue;
    }
    if ($childpage instanceof admin_externalpage) {
        $outputhtml .= $OUTPUT->heading(html_writer::link($childpage->url, $childpage->visiblename), 3);
    } else if ($childpage instanceof admin_settingpage) {
        $outputhtml .= $OUTPUT->heading(html_writer::link(new moodle_url('/'.$CFG->admin.'/settings.php', array('section' => $childpage->name)), $childpage->visiblename), 3);
    } else if ($childpage instanceof admin_category) {
        $outputhtml .= $OUTPUT->heading(html_writer::link(new moodle_url('/'.$CFG->admin.'/category.php', array('category' => $childpage->name)), get_string('admincategory', 'admin', $childpage->visiblename)), 3);
    } else {
        continue;
    }
    if (!empty($childpage->settings)) {
        $outputhtml .= html_writer::start_tag('fieldset', array('class' => 'adminsettings'));
        foreach ($childpage->settings as $setting) {
            if (empty($setting->nosave)) {
                $savebutton = true;
            }
            $fullname = $setting->get_full_name();
            if (array_key_exists($fullname, $adminroot->errors)) {
                $data = $adminroot->errors[$fullname]->data;
            } else {
                $data = $setting->get_setting();
            }
            $outputhtml .= html_writer::tag('div', '<!-- -->', array('class' => 'clearer'));
            $outputhtml .= $setting->output_html($data);
        }
        $outputhtml .= html_writer::end_tag('fieldset');
    }
}
if ($savebutton) {
    $outputhtml .= html_writer::start_tag('div', array('class' => 'form-buttons'));
    $outputhtml .= html_writer::empty_tag('input', array('class' => 'form-submit', 'type' => 'submit', 'value' => get_string('savechanges','admin')));
    $outputhtml .= html_writer::end_tag('div');
}

$visiblepathtosection = array_reverse($settingspage->visiblepath);
$PAGE->set_title("$SITE->shortname: " . implode(": ",$visiblepathtosection));
$PAGE->set_heading($SITE->fullname);
$PAGE->set_button($buttons);

echo $OUTPUT->header();

if ($errormsg !== '') {
    echo $OUTPUT->notification($errormsg);
} else if ($statusmsg !== '') {
    echo $OUTPUT->notification($statusmsg, 'notifysuccess');
}

$path = array_reverse($settingspage->visiblepath);
if (is_array($path)) {
    $visiblename = join(' / ', $path);
} else {
    $visiblename = $path;
}
echo $OUTPUT->heading(get_string('admincategory', 'admin', $visiblename), 2);

echo html_writer::start_tag('form', array('action' => '', 'method' => 'post', 'id' => 'adminsettings'));
echo html_writer::start_tag('div');
echo html_writer::input_hidden_params(new moodle_url($PAGE->url, array('sesskey' => sesskey(), 'return' => $return)));
echo html_writer::end_tag('div');
echo html_writer::start_tag('fieldset');
echo html_writer::tag('div', '<!-- -->', array('class' => 'clearer'));
echo $outputhtml;
echo html_writer::end_tag('fieldset');
echo html_writer::end_tag('form');

echo $OUTPUT->footer();