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/>.

/**

 * Main administration script.

 *

 * @package    core

 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

// Check that config.php exists, if not then call the install script

if (!file_exists('../config.php')) {

    header('Location: ../install.php');

    die();

}

// Check that PHP is of a sufficient version as soon as possible.

require_once(__DIR__.'/../lib/phpminimumversionlib.php');

moodle_require_minimum_php_version();

// make sure iconv is available and actually works

if (!function_exists('iconv')) {

    // this should not happen, this must be very borked install

    echo 'Moodle requires the iconv PHP extension. Please install or enable the iconv extension.';

    die();

}

// Make sure xml extension is available.

if (!extension_loaded('xml')) {

    echo 'Moodle requires the xml PHP extension. Please install or enable the xml extension.';

    die();

}

// Make sure mbstring extension is available.

if (!extension_loaded('mbstring')) {

    echo 'Moodle requires the mbstring PHP extension. Please install or enable the mbstring extension.';

    die();

}

define('NO_OUTPUT_BUFFERING', true);

if (isset($_POST['upgradekey'])) {

    // Before you start reporting issues about the collision attacks against

    // SHA-1, you should understand that we are not actually attempting to do

    // any cryptography here. This is hashed purely so that the key is not

    // that apparent in the address bar itself. Anyone who catches the HTTP

    // traffic can immediately use it as a valid admin key.

    header('Location: index.php?cache=0&upgradekeyhash='.sha1($_POST['upgradekey']));

    die();

}

if ((isset($_GET['cache']) and $_GET['cache'] === '0')

        or (isset($_POST['cache']) and $_POST['cache'] === '0')

        or (!isset($_POST['cache']) and !isset($_GET['cache']) and empty($_GET['sesskey']) and empty($_POST['sesskey']))) {

    // Prevent caching at all cost when visiting this page directly,

    // we redirect to self once we known no upgrades are necessary.

    // Note: $_GET and $_POST are used here intentionally because our param cleaning is not loaded yet.

    // Note2: the sesskey is present in all block editing hacks, we can not redirect there, so enable caching.

    define('CACHE_DISABLE_ALL', true);

    // Force OPcache reset if used, we do not want any stale caches

    // when detecting if upgrade necessary or when running upgrade.

    if (function_exists('opcache_reset')) {

        opcache_reset();

    }

    $cache = 0;

} else {

    $cache = 1;

}

require('../config.php');

// Invalidate the cache of version.php in any circumstances to help core_component

// detecting if the version has changed and component cache should be reset.

if (function_exists('opcache_invalidate')) {

    opcache_invalidate($CFG->dirroot . '/version.php', true);

}

// Make sure the component cache gets rebuilt if necessary, any method that

// indirectly calls the protected init() method is good here.

core_component::get_core_subsystems();

if (is_major_upgrade_required() && isloggedin()) {

    // A major upgrade is required.

    // Terminate the session and redirect back here before anything DB-related happens.

    redirect_if_major_upgrade_required();

}

require_once($CFG->libdir.'/adminlib.php');    // various admin-only functions

require_once($CFG->libdir.'/upgradelib.php');  // general upgrade/install related functions

$confirmupgrade = optional_param('confirmupgrade', 0, PARAM_BOOL); // Core upgrade confirmed?

$confirmrelease = optional_param('confirmrelease', 0, PARAM_BOOL); // Core release info and server checks confirmed?

$confirmplugins = optional_param('confirmplugincheck', 0, PARAM_BOOL); // Plugins check page confirmed?

$showallplugins = optional_param('showallplugins', 0, PARAM_BOOL); // Show all plugins on the plugins check page?

$agreelicense = optional_param('agreelicense', 0, PARAM_BOOL); // GPL license confirmed for installation?

$fetchupdates = optional_param('fetchupdates', 0, PARAM_BOOL); // Should check for available updates?

$newaddonreq = optional_param('installaddonrequest', null, PARAM_RAW); // Plugin installation requested at moodle.org/plugins.

$upgradekeyhash = optional_param('upgradekeyhash', null, PARAM_ALPHANUM); // Hash of provided upgrade key.

$installdep = optional_param('installdep', null, PARAM_COMPONENT); // Install given missing dependency (required plugin).

$installdepx = optional_param('installdepx', false, PARAM_BOOL); // Install all missing dependencies.

$confirminstalldep = optional_param('confirminstalldep', false, PARAM_BOOL); // Installing dependencies confirmed.

$abortinstall = optional_param('abortinstall', null, PARAM_COMPONENT); // Cancel installation of the given new plugin.

$abortinstallx = optional_param('abortinstallx', null, PARAM_BOOL); // Cancel installation of all new plugins.

$confirmabortinstall = optional_param('confirmabortinstall', false, PARAM_BOOL); // Installation cancel confirmed.

$abortupgrade = optional_param('abortupgrade', null, PARAM_COMPONENT); // Cancel upgrade of the given existing plugin.

$abortupgradex = optional_param('abortupgradex', null, PARAM_BOOL); // Cancel upgrade of all upgradable plugins.

$confirmabortupgrade = optional_param('confirmabortupgrade', false, PARAM_BOOL); // Upgrade cancel confirmed.

$installupdate = optional_param('installupdate', null, PARAM_COMPONENT); // Install given available update.

$installupdateversion = optional_param('installupdateversion', null, PARAM_INT); // Version of the available update to install.

$installupdatex = optional_param('installupdatex', false, PARAM_BOOL); // Install all available plugin updates.

$confirminstallupdate = optional_param('confirminstallupdate', false, PARAM_BOOL); // Available update(s) install confirmed?

if (!empty($CFG->disableupdateautodeploy)) {

    // Invalidate all requests to install plugins via the admin UI.

    $newaddonreq = null;

    $installdep = null;

    $installdepx = false;

    $abortupgrade = null;

    $abortupgradex = null;

    $installupdate = null;

    $installupdateversion = null;

    $installupdatex = false;

}

// Set up PAGE.

$url = new moodle_url('/admin/index.php');

$url->param('cache', $cache);

if (isset($upgradekeyhash)) {

    $url->param('upgradekeyhash', $upgradekeyhash);

}

$PAGE->set_url($url);

unset($url);

// Are we returning from an add-on installation request at moodle.org/plugins?

if ($newaddonreq and !$cache and empty($CFG->disableupdateautodeploy)) {

    $target = new moodle_url('/admin/tool/installaddon/index.php', array(

        'installaddonrequest' => $newaddonreq,

        'confirm' => 0));

    if (!isloggedin() or isguestuser()) {

        // Login and go the the add-on tool page.

        $SESSION->wantsurl = $target->out();

        redirect(get_login_url());

    }

    redirect($target);

}

$PAGE->set_pagelayout('admin'); // Set a default pagelayout

$documentationlink = '<a href="http://docs.moodle.org/en/Installation">Installation docs</a>';

// Check some PHP server settings

if (ini_get_bool('session.auto_start')) {

    throw new \moodle_exception('phpvaroff', 'debug', '',

        (object)array('name' => 'session.auto_start', 'link' => $documentationlink));

}

if (!ini_get_bool('file_uploads')) {

    throw new \moodle_exception('phpvaron', 'debug', '',

        (object)array('name' => 'file_uploads', 'link' => $documentationlink));

}

if (is_float_problem()) {

    throw new \moodle_exception('phpfloatproblem', 'admin', '', $documentationlink);

}

// Set some necessary variables during set-up to avoid PHP warnings later on this page

if (!isset($CFG->release)) {

    $CFG->release = '';

}

if (!isset($CFG->version)) {

    $CFG->version = '';

}

if (!isset($CFG->branch)) {

    $CFG->branch = '';

}

$version = null;

$release = null;

$branch = null;

require("$CFG->dirroot/version.php");       // defines $version, $release, $branch and $maturity

$CFG->target_release = $release;            // used during installation and upgrades

if (!$version or !$release) {

    throw new \moodle_exception('withoutversion', 'debug'); // Without version, stop.

}

if (!core_tables_exist()) {

    $PAGE->set_pagelayout('maintenance');

    $PAGE->set_popup_notification_allowed(false);

    // fake some settings

    $CFG->docroot = 'http://docs.moodle.org';

    $strinstallation = get_string('installation', 'install');

    // remove current session content completely

    \core\session\manager::terminate_current();

    if (empty($agreelicense)) {

        $strlicense = get_string('license');

        $PAGE->navbar->add($strlicense);

        $PAGE->set_title($strinstallation . moodle_page::TITLE_SEPARATOR . 'Moodle ' . $CFG->target_release, false);

        $PAGE->set_heading($strinstallation);

        $PAGE->set_cacheable(false);

        $output = $PAGE->get_renderer('core', 'admin');

        echo $output->install_licence_page();

        die();

    }

    if (empty($confirmrelease)) {

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

        list($envstatus, $environmentresults) = check_moodle_environment(normalize_version($release), ENV_SELECT_RELEASE);

        $strcurrentrelease = get_string('currentrelease');

        $PAGE->navbar->add($strcurrentrelease);

        $PAGE->set_title($strinstallation);

        $PAGE->set_heading($strinstallation . ' - Moodle ' . $CFG->target_release);

        $PAGE->set_cacheable(false);

        $output = $PAGE->get_renderer('core', 'admin');

        echo $output->install_environment_page($maturity, $envstatus, $environmentresults, $release);

        die();

    }

    // check plugin dependencies

    $failed = array();

    if (!core_plugin_manager::instance()->all_plugins_ok($version, $failed, $CFG->branch)) {

        $PAGE->navbar->add(get_string('pluginscheck', 'admin'));

        $PAGE->set_title($strinstallation);

        $PAGE->set_heading($strinstallation . ' - Moodle ' . $CFG->target_release);

        $output = $PAGE->get_renderer('core', 'admin');

        $url = new moodle_url($PAGE->url, array('agreelicense' => 1, 'confirmrelease' => 1, 'lang' => $CFG->lang));

        echo $output->unsatisfied_dependencies_page($version, $failed, $url);

        die();

    }

    unset($failed);

    //TODO: add a page with list of non-standard plugins here

    $strdatabasesetup = get_string('databasesetup');

    upgrade_init_javascript();

    $PAGE->navbar->add($strdatabasesetup);

    $PAGE->set_title($strinstallation . moodle_page::TITLE_SEPARATOR . $CFG->target_release, false);

    $PAGE->set_heading($strinstallation);

    $PAGE->set_cacheable(false);

    $output = $PAGE->get_renderer('core', 'admin');

    echo $output->header();

    if (!$DB->setup_is_unicodedb()) {

        if (!$DB->change_db_encoding()) {

            // If could not convert successfully, throw error, and prevent installation

            throw new \moodle_exception('unicoderequired', 'admin');

        }

    }

    install_core($version, true);

}

// Check version of Moodle code on disk compared with database

// and upgrade if possible.

if (!$cache) {

    // Do not try to do anything fancy in non-cached mode,

    // this prevents themes from fetching data from non-existent tables.

    $PAGE->set_pagelayout('maintenance');

    $PAGE->set_popup_notification_allowed(false);

}

$stradministration = get_string('administration');

$PAGE->set_context(context_system::instance());

if (empty($CFG->version)) {

    throw new \moodle_exception('missingconfigversion', 'debug');

}

// If an upgrade is running, an admin page starting a frontend upgrade could corrupt the

// DB if the upgrade collided with an already running upgrade process at the wrong time.

// Pull the value direct from the DB, this needs to *always* be correct.

$outagelessupgrade = !empty($DB->get_field('config', 'value', ['name' => 'outagelessupgrade']));

if (!$outagelessupgrade) {

    // Detect config cache inconsistency, this happens when you switch branches on dev servers.

    if ($CFG->version != $DB->get_field('config', 'value', array('name' => 'version'))) {

        purge_all_caches();

        redirect(new moodle_url($PAGE->url), 'Config cache inconsistency detected, resetting caches...');

    }

    if (!$cache && $version > $CFG->version && !$outagelessupgrade) {  // Upgrade.

        $PAGE->set_url(new moodle_url($PAGE->url, array(

            'confirmupgrade' => $confirmupgrade,

            'confirmrelease' => $confirmrelease,

            'confirmplugincheck' => $confirmplugins,

        )));

        check_upgrade_key($upgradekeyhash);

        // Warning about upgrading a test site.

        $testsite = false;

        if (defined('BEHAT_SITE_RUNNING')) {

            $testsite = 'behat';

        }

        if (isset($CFG->themerev)) {

            // Store the themerev to restore after purging caches.

            $themerev = $CFG->themerev;

        }

        // We purge all of MUC's caches here.

        // Caches are disabled for upgrade by CACHE_DISABLE_ALL so we must set the first arg to true.

        // This ensures a real config object is loaded and the stores will be purged.

        // This is the only way we can purge custom caches such as memcache or APC.

        // Note: all other calls to caches will still used the disabled API.

        cache_helper::purge_all(true);

        // We then purge the regular caches.

        purge_all_caches();

        if (isset($themerev)) {

            // Restore the themerev.

            set_config('themerev', $themerev);

        }

        $output = $PAGE->get_renderer('core', 'admin');

        if (upgrade_stale_php_files_present()) {

            $PAGE->set_title($stradministration);

            $PAGE->set_cacheable(false);

            echo $output->upgrade_stale_php_files_page();

            die();

        }

        if (empty($confirmupgrade)) {

            $a = new stdClass();

            $a->oldversion = "$CFG->release (".sprintf('%.2f', $CFG->version).")";

            $a->newversion = "$release (".sprintf('%.2f', $version).")";

            $strdatabasechecking = get_string('databasechecking', '', $a);

            $PAGE->set_title($stradministration);

            $PAGE->set_heading($strdatabasechecking);

            $PAGE->set_cacheable(false);

            echo $output->upgrade_confirm_page($a->newversion, $maturity, $testsite);

            die();

        } else if (empty($confirmrelease)) {

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

            list($envstatus, $environmentresults) = check_moodle_environment($release, ENV_SELECT_RELEASE);

            $strcurrentrelease = get_string('currentrelease');

            $PAGE->navbar->add($strcurrentrelease);

            $PAGE->set_title($strcurrentrelease);

            $PAGE->set_heading($strcurrentrelease);

            $PAGE->set_cacheable(false);

            echo $output->upgrade_environment_page($release, $envstatus, $environmentresults);

            die();

        } else if (empty($confirmplugins)) {

            $strplugincheck = get_string('plugincheck');

            $PAGE->navbar->add($strplugincheck);

            $PAGE->set_title($strplugincheck);

            $PAGE->set_heading($strplugincheck);

            $PAGE->set_cacheable(false);

            $pluginman = core_plugin_manager::instance();

            // Check for available updates.

            if ($fetchupdates) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $updateschecker = \core\update\checker::instance();

                if ($updateschecker->enabled()) {

                    $updateschecker->fetch();

                }

                redirect($PAGE->url);

            }

            // Cancel all plugin installations.

            if ($abortinstallx) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $abortables = $pluginman->list_cancellable_installations();

                if ($abortables) {

                    if ($confirmabortinstall) {

                        foreach ($abortables as $plugin) {

                            $pluginman->cancel_plugin_installation($plugin->component);

                        }

                        redirect($PAGE->url);

                    } else {

                        $continue = new moodle_url($PAGE->url, ['abortinstallx' => $abortinstallx, 'confirmabortinstall' => 1]);

                        echo $output->upgrade_confirm_abort_install_page($abortables, $continue);

                        die();

                    }

                }

                redirect($PAGE->url);

            }

            // Cancel single plugin installation.

            if ($abortinstall) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                if ($confirmabortinstall) {

                    $pluginman->cancel_plugin_installation($abortinstall);

                    redirect($PAGE->url);

                } else {

                    $continue = new moodle_url($PAGE->url, array('abortinstall' => $abortinstall, 'confirmabortinstall' => 1));

                    $abortable = $pluginman->get_plugin_info($abortinstall);

                    if ($pluginman->can_cancel_plugin_installation($abortable)) {

                        echo $output->upgrade_confirm_abort_install_page(array($abortable), $continue);

                        die();

                    }

                    redirect($PAGE->url);

                }

            }

            // Cancel all plugins upgrades (that is, restore archived versions).

            if ($abortupgradex) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $restorable = $pluginman->list_restorable_archives();

                if ($restorable) {

                    upgrade_install_plugins($restorable, $confirmabortupgrade,

                        get_string('cancelupgradehead', 'core_plugin'),

                        new moodle_url($PAGE->url, array('abortupgradex' => 1, 'confirmabortupgrade' => 1))

                    );

                }

                redirect($PAGE->url);

            }

            // Cancel single plugin upgrade (that is, install the archived version).

            if ($abortupgrade) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $restorable = $pluginman->list_restorable_archives();

                if (isset($restorable[$abortupgrade])) {

                    $restorable = array($restorable[$abortupgrade]);

                    upgrade_install_plugins($restorable, $confirmabortupgrade,

                        get_string('cancelupgradehead', 'core_plugin'),

                        new moodle_url($PAGE->url, array('abortupgrade' => $abortupgrade, 'confirmabortupgrade' => 1))

                    );

                }

                redirect($PAGE->url);

            }

            // Install all available missing dependencies.

            if ($installdepx) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $installable = $pluginman->filter_installable($pluginman->missing_dependencies(true));

                upgrade_install_plugins($installable, $confirminstalldep,

                    get_string('dependencyinstallhead', 'core_plugin'),

                    new moodle_url($PAGE->url, array('installdepx' => 1, 'confirminstalldep' => 1))

                );

            }

            // Install single available missing dependency.

            if ($installdep) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $installable = $pluginman->filter_installable($pluginman->missing_dependencies(true));

                if (!empty($installable[$installdep])) {

                    $installable = array($installable[$installdep]);

                    upgrade_install_plugins($installable, $confirminstalldep,

                        get_string('dependencyinstallhead', 'core_plugin'),

                        new moodle_url($PAGE->url, array('installdep' => $installdep, 'confirminstalldep' => 1))

                    );

                }

            }

            // Install all available updates.

            if ($installupdatex) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                $installable = $pluginman->filter_installable($pluginman->available_updates());

                upgrade_install_plugins($installable, $confirminstallupdate,

                    get_string('updateavailableinstallallhead', 'core_admin'),

                    new moodle_url($PAGE->url, array('installupdatex' => 1, 'confirminstallupdate' => 1))

                );

            }

            // Install single available update.

            if ($installupdate and $installupdateversion) {

                // No sesskey support guaranteed here, because sessions might not work yet.

                if ($pluginman->is_remote_plugin_installable($installupdate, $installupdateversion)) {

                    $installable = array($pluginman->get_remote_plugin_info($installupdate, $installupdateversion, true));

                    upgrade_install_plugins($installable, $confirminstallupdate,

                        get_string('updateavailableinstallallhead', 'core_admin'),

                        new moodle_url($PAGE->url, array('installupdate' => $installupdate,

                            'installupdateversion' => $installupdateversion, 'confirminstallupdate' => 1)

                        )

                    );

                }

            }

            echo $output->upgrade_plugin_check_page(core_plugin_manager::instance(), \core\update\checker::instance(),

                    $version, $showallplugins, $PAGE->url, new moodle_url($PAGE->url, array('confirmplugincheck' => 1)));

            die();

        } else {

            // Always verify plugin dependencies!

            $failed = array();

            if (!core_plugin_manager::instance()->all_plugins_ok($version, $failed, $CFG->branch)) {

                echo $output->unsatisfied_dependencies_page($version, $failed, new moodle_url($PAGE->url,

                    array('confirmplugincheck' => 0)));

                die();

            }

            unset($failed);

            // Launch main upgrade.

            upgrade_core($version, true);

        }

    } else if ($version < $CFG->version) {

        // Better stop here, we can not continue with plugin upgrades or anything else.

        throw new moodle_exception('downgradedcore', 'error', new moodle_url('/admin/'));

    }

    // Updated human-readable release version if necessary.

    if (!$cache && $release <> $CFG->release ) {  // Update the release version.

        set_config('release', $release);

    }

    if (!$cache && $branch <> $CFG->branch) {  // Update the branch.

        set_config('branch', $branch);

    }

    if (!$cache && moodle_needs_upgrading()) {

        $PAGE->set_url(new moodle_url($PAGE->url, array(

            'confirmrelease' => $confirmrelease,

            'confirmplugincheck' => $confirmplugins,

        )));

        check_upgrade_key($upgradekeyhash);

        if (!$PAGE->headerprinted) {

            // Means core upgrade or installation was not already done.

            $pluginman = core_plugin_manager::instance();

            $output = $PAGE->get_renderer('core', 'admin');

            if (empty($confirmrelease)) {

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

                list($envstatus, $environmentresults) = check_moodle_environment($release, ENV_SELECT_RELEASE);

                $strcurrentrelease = get_string('currentrelease');

                $PAGE->navbar->add($strcurrentrelease);

                $PAGE->set_title($strcurrentrelease);

                $PAGE->set_heading($strcurrentrelease);

                $PAGE->set_cacheable(false);

                echo $output->upgrade_environment_page($release, $envstatus, $environmentresults);

                die();

            } else if (!$confirmplugins) {

                $strplugincheck = get_string('plugincheck');

                $PAGE->navbar->add($strplugincheck);

                $PAGE->set_title($strplugincheck);

                $PAGE->set_heading($strplugincheck);

                $PAGE->set_cacheable(false);

                // Check for available updates.

                if ($fetchupdates) {

                    require_sesskey();

                    $updateschecker = \core\update\checker::instance();

                    if ($updateschecker->enabled()) {

                        $updateschecker->fetch();

                    }

                    redirect($PAGE->url);

                }

                // Cancel all plugin installations.

                if ($abortinstallx) {

                    require_sesskey();

                    $abortables = $pluginman->list_cancellable_installations();

                    if ($abortables) {

                        if ($confirmabortinstall) {

                            foreach ($abortables as $plugin) {

                                $pluginman->cancel_plugin_installation($plugin->component);

                            }

                            redirect($PAGE->url);

                        } else {

                            $continue = new moodle_url($PAGE->url, array('abortinstallx' => $abortinstallx,

                                'confirmabortinstall' => 1));

                            echo $output->upgrade_confirm_abort_install_page($abortables, $continue);

                            die();

                        }

                    }

                    redirect($PAGE->url);

                }

                // Cancel single plugin installation.

                if ($abortinstall) {

                    require_sesskey();

                    if ($confirmabortinstall) {

                        $pluginman->cancel_plugin_installation($abortinstall);

                        redirect($PAGE->url);

                    } else {

                        $continue = new moodle_url($PAGE->url, array('abortinstall' => $abortinstall, 'confirmabortinstall' => 1));

                        $abortable = $pluginman->get_plugin_info($abortinstall);

                        if ($pluginman->can_cancel_plugin_installation($abortable)) {

                            echo $output->upgrade_confirm_abort_install_page(array($abortable), $continue);

                            die();

                        }

                        redirect($PAGE->url);

                    }

                }

                // Cancel all plugins upgrades (that is, restore archived versions).

                if ($abortupgradex) {

                    require_sesskey();

                    $restorable = $pluginman->list_restorable_archives();

                    if ($restorable) {

                        upgrade_install_plugins($restorable, $confirmabortupgrade,

                            get_string('cancelupgradehead', 'core_plugin'),

                            new moodle_url($PAGE->url, array('abortupgradex' => 1, 'confirmabortupgrade' => 1))

                        );

                    }

                    redirect($PAGE->url);

                }

                // Cancel single plugin upgrade (that is, install the archived version).

                if ($abortupgrade) {

                    require_sesskey();

                    $restorable = $pluginman->list_restorable_archives();

                    if (isset($restorable[$abortupgrade])) {

                        $restorable = array($restorable[$abortupgrade]);

                        upgrade_install_plugins($restorable, $confirmabortupgrade,

                            get_string('cancelupgradehead', 'core_plugin'),

                            new moodle_url($PAGE->url, array('abortupgrade' => $abortupgrade, 'confirmabortupgrade' => 1))

                        );

                    }

                    redirect($PAGE->url);

                }

                // Install all available missing dependencies.

                if ($installdepx) {

                    require_sesskey();

                    $installable = $pluginman->filter_installable($pluginman->missing_dependencies(true));

                    upgrade_install_plugins($installable, $confirminstalldep,

                        get_string('dependencyinstallhead', 'core_plugin'),

                        new moodle_url($PAGE->url, array('installdepx' => 1, 'confirminstalldep' => 1))

                    );

                }

                // Install single available missing dependency.

                if ($installdep) {

                    require_sesskey();

                    $installable = $pluginman->filter_installable($pluginman->missing_dependencies(true));

                    if (!empty($installable[$installdep])) {

                        $installable = array($installable[$installdep]);

                        upgrade_install_plugins($installable, $confirminstalldep,

                            get_string('dependencyinstallhead', 'core_plugin'),

                            new moodle_url($PAGE->url, array('installdep' => $installdep, 'confirminstalldep' => 1))

                        );

                    }

                }

                // Install all available updates.

                if ($installupdatex) {

                    require_sesskey();

                    $installable = $pluginman->filter_installable($pluginman->available_updates());

                    upgrade_install_plugins($installable, $confirminstallupdate,

                        get_string('updateavailableinstallallhead', 'core_admin'),

                        new moodle_url($PAGE->url, array('installupdatex' => 1, 'confirminstallupdate' => 1))

                    );

                }

                // Install single available update.

                if ($installupdate && $installupdateversion) {

                    require_sesskey();

                    if ($pluginman->is_remote_plugin_installable($installupdate, $installupdateversion)) {

                        $installable = array($pluginman->get_remote_plugin_info($installupdate, $installupdateversion, true));

                        upgrade_install_plugins($installable, $confirminstallupdate,

                            get_string('updateavailableinstallallhead', 'core_admin'),

                            new moodle_url($PAGE->url, array('installupdate' => $installupdate,

                                'installupdateversion' => $installupdateversion, 'confirminstallupdate' => 1)

                            )

                        );

                    }

                }

                // Show plugins info.

                echo $output->upgrade_plugin_check_page($pluginman, \core\update\checker::instance(),

                        $version, $showallplugins,

                        new moodle_url($PAGE->url),

                        new moodle_url($PAGE->url, array('confirmplugincheck' => 1, 'cache' => 0)));

                die();

            }

            // Make sure plugin dependencies are always checked.

            $failed = array();

            if (!$pluginman->all_plugins_ok($version, $failed, $CFG->branch)) {

                $output = $PAGE->get_renderer('core', 'admin');

                echo $output->unsatisfied_dependencies_page($version, $failed, new moodle_url($PAGE->url,

                    array('confirmplugincheck' => 0)));

                die();

            }

            unset($failed);

        }

        // Install/upgrade all plugins and other parts.

        upgrade_noncore(true);

    }

    // If this is the first install, indicate that this site is fully configured,

    // Except the admin password.

    if (during_initial_install()) {

        set_config('rolesactive', 1); // After this, during_initial_install will return false.

        set_config('adminsetuppending', 1);

        set_config('registrationpending', 1); // Remind to register site after all other setup is finished.

        // Apply default preset, if it is defined in $CFG and has a valid value.

        if (!empty($CFG->setsitepresetduringinstall)) {

            \core_adminpresets\helper::change_default_preset($CFG->setsitepresetduringinstall);

        }

        // We need this redirect to setup proper session.

        upgrade_finished("index.php?sessionstarted=1&lang=$CFG->lang");

    }

    // Make sure admin user is created - this is the last step,

    // We need session to be working properly in order to edit admin account.

    if (!empty($CFG->adminsetuppending)) {

        $sessionstarted = optional_param('sessionstarted', 0, PARAM_BOOL);

        if (!$sessionstarted) {

            redirect("index.php?sessionstarted=1&lang=$CFG->lang");

        } else {

            $sessionverify = optional_param('sessionverify', 0, PARAM_BOOL);

            if (!$sessionverify) {

                $SESSION->sessionverify = 1;

                redirect("index.php?sessionstarted=1&sessionverify=1&lang=$CFG->lang");

            } else {

                if (empty($SESSION->sessionverify)) {

                    throw new \moodle_exception('installsessionerror', 'admin', "index.php?sessionstarted=1&lang=$CFG->lang");

                }

                unset($SESSION->sessionverify);

            }

        }

        // Cleanup SESSION to make sure other code does not complain in the future.

        unset($SESSION->has_timed_out);

        unset($SESSION->wantsurl);

        // At this stage there can be only one admin unless more were added by install,

        // Users may change username, so do not rely on that.

        $adminids = explode(',', $CFG->siteadmins);

        $adminuser = get_complete_user_data('id', reset($adminids));

        if ($adminuser->password === 'adminsetuppending') {

            // Prevent installation hijacking.

            if ($adminuser->lastip !== getremoteaddr()) {

                throw new \moodle_exception('installhijacked', 'admin');

            }

            // Login user and let him set password and admin details.

            $adminuser->newadminuser = 1;

            complete_user_login($adminuser);

            redirect("$CFG->wwwroot/user/editadvanced.php?id=$adminuser->id"); // Edit thyself.

        } else {

            unset_config('adminsetuppending');

        }

    } else {

        // Just make sure upgrade logging is properly terminated.

        upgrade_finished('upgradesettings.php');

    }

}

if (has_capability('moodle/site:config', context_system::instance())) {

    if ($fetchupdates) {

        require_sesskey();

        $updateschecker = \core\update\checker::instance();

        if ($updateschecker->enabled()) {

            $updateschecker->fetch();

        }

        redirect(new moodle_url('/admin/index.php', array('cache' => 0)));

    }

}

// Now we can be sure everything was upgraded and caches work fine,

// redirect if necessary to make sure caching is enabled.

if (!$cache) {

    redirect(new moodle_url('/admin/index.php', array('cache' => 1)));

}

// Check for valid admin user - no guest autologin

require_login(0, false);

if (isguestuser()) {

    // Login as real user!

    $SESSION->wantsurl = (string)new moodle_url('/admin/index.php');

    redirect(get_login_url());

}

$context = context_system::instance();

if (!has_capability('moodle/site:config', $context)) {

    // Do not throw exception display an empty page with administration menu if visible for current user.

    $PAGE->set_title(get_string('home'));

    $PAGE->set_heading($SITE->fullname);

    echo $OUTPUT->header();

    echo $OUTPUT->footer();

    exit;

}

// check that site is properly customized

$site = get_site();

if (empty($site->shortname)) {

    // probably new installation - lets return to frontpage after this step

    // remove settings that we want uninitialised

    unset_config('registerauth');

    unset_config('timezone'); // Force admin to select timezone!

    redirect('upgradesettings.php?return=site');

}

// setup critical warnings before printing admin tree block

$insecuredataroot = is_dataroot_insecure(true);

$SESSION->admin_critical_warning = ($insecuredataroot==INSECURE_DATAROOT_ERROR);

$adminroot = admin_get_root();

$PAGE->set_primary_active_tab('siteadminnode');

// Check if there are any new admin settings which have still yet to be set

if (any_new_admin_settings($adminroot)) {

    redirect('upgradesettings.php');

}

// Return to original page that started the plugin uninstallation if necessary.

if (isset($SESSION->pluginuninstallreturn)) {

    $return = $SESSION->pluginuninstallreturn;

    unset($SESSION->pluginuninstallreturn);

    if ($return) {

        redirect($return);

    }

}

// If site registration needs updating, redirect.

\core\hub\registration::registration_reminder('/admin/index.php');

// Everything should now be set up, and the user is an admin

// Print default admin page with notifications.

$errorsdisplayed = defined('WARN_DISPLAY_ERRORS_ENABLED');

$lastcron = get_config('tool_task', 'lastcronstart');

$cronoverdue = ($lastcron < time() - 3600 * 24);

$lastcroninterval = get_config('tool_task', 'lastcroninterval');

$expectedfrequency = $CFG->expectedcronfrequency ?? MINSECS;

$croninfrequent = !$cronoverdue && ($lastcroninterval > ($expectedfrequency + MINSECS) || $lastcron < time() - $expectedfrequency);

$dbproblems = $DB->diagnose();

$maintenancemode = !empty($CFG->maintenance_enabled);

// Available updates for Moodle core.

$updateschecker = \core\update\checker::instance();

$availableupdates = array();

$availableupdatesfetch = null;

if ($updateschecker->enabled()) {

    // Only compute the update information when it is going to be displayed to the user.

    $availableupdates['core'] = $updateschecker->get_update_info('core',

        array('minmaturity' => $CFG->updateminmaturity, 'notifybuilds' => $CFG->updatenotifybuilds));

    // Available updates for contributed plugins

    $pluginman = core_plugin_manager::instance();

    foreach ($pluginman->get_plugins() as $plugintype => $plugintypeinstances) {

        foreach ($plugintypeinstances as $pluginname => $plugininfo) {

            $pluginavailableupdates = $plugininfo->available_updates();

            if (!empty($pluginavailableupdates)) {

                foreach ($pluginavailableupdates as $pluginavailableupdate) {

                    if (!isset($availableupdates[$plugintype.'_'.$pluginname])) {

                        $availableupdates[$plugintype.'_'.$pluginname] = array();

                    }

                    $availableupdates[$plugintype.'_'.$pluginname][] = $pluginavailableupdate;

                }

            }

        }

    }

    // The timestamp of the most recent check for available updates

    $availableupdatesfetch = $updateschecker->get_last_timefetched();

}

$buggyiconvnomb = (!function_exists('mb_convert_encoding') and @iconv('UTF-8', 'UTF-8//IGNORE', '100'.chr(130).'€') !== '100€');

//check if the site is registered on Moodle.org

$registered = \core\hub\registration::is_registered();

// Check if there are any cache warnings.

$cachewarnings = cache_helper::warnings();

// Check if there are events 1 API handlers.

$eventshandlers = $DB->get_records_sql('SELECT DISTINCT component FROM {events_handlers}');

$themedesignermode = !empty($CFG->themedesignermode);

$mobileconfigured = !empty($CFG->enablemobilewebservice);

$invalidforgottenpasswordurl = !empty($CFG->forgottenpasswordurl) && empty(clean_param($CFG->forgottenpasswordurl, PARAM_URL));

// Check if a directory with development libraries exists.

if (empty($CFG->disabledevlibdirscheck) && (is_dir($CFG->dirroot.'/vendor') || is_dir($CFG->dirroot.'/node_modules'))) {

    $devlibdir = true;

} else {

    $devlibdir = false;

}

// Check if the site is being foced onto ssl.

$overridetossl = !empty($CFG->overridetossl);

// Check if moodle campaign content setting is enabled or not.

$showcampaigncontent = !isset($CFG->showcampaigncontent) || $CFG->showcampaigncontent;

// Encourage admins to enable the user feedback feature if it is not enabled already.

$showfeedbackencouragement = empty($CFG->enableuserfeedback);

// Check if the service and support content setting is enabled or not.

$servicesandsupportcontent = !isset($CFG->showservicesandsupportcontent) || $CFG->showservicesandsupportcontent;

// Check whether the XML-RPC protocol is enabled or not.

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

$result = new environment_results('custom_checks');

$result = check_xmlrpc_usage($result);

$xmlrpcwarning = !is_null($result) ? get_string($result->getFeedbackStr(), 'admin') : '';

admin_externalpage_setup('adminnotifications');

$output = $PAGE->get_renderer('core', 'admin');

echo $output->admin_notifications_page($maturity, $insecuredataroot, $errorsdisplayed, $cronoverdue, $dbproblems,

                                       $maintenancemode, $availableupdates, $availableupdatesfetch, $buggyiconvnomb,

                                       $registered, $cachewarnings, $eventshandlers, $themedesignermode, $devlibdir,

                                       $mobileconfigured, $overridetossl, $invalidforgottenpasswordurl, $croninfrequent,

                                       $showcampaigncontent, $showfeedbackencouragement, $servicesandsupportcontent,

                                       $xmlrpcwarning);