<?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/>.

/**
 * Class for Moodle Mobile tools.
 *
 * @package    tool_mobile
 * @copyright  2016 Juan Leyva
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @since      Moodle 3.1
 */
namespace tool_mobile;

use core_component;
use core_plugin_manager;
use context_system;

/**
 * API exposed by tool_mobile
 *
 * @copyright  2016 Juan Leyva
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @since      Moodle 3.1
 */
class api {

    /**
     * Returns a list of Moodle plugins supporting the mobile app.
     *
     * @return array an array of objects containing the plugin information
     */
    public static function get_plugins_supporting_mobile() {
        global $CFG;
        require_once($CFG->libdir . '/adminlib.php');

        $pluginsinfo = [];
        $plugintypes = core_component::get_plugin_types();

        foreach ($plugintypes as $plugintype => $unused) {
            // We need to include files here.
            $pluginswithfile = core_component::get_plugin_list_with_file($plugintype, 'db' . DIRECTORY_SEPARATOR . 'mobile.php');
            foreach ($pluginswithfile as $plugin => $notused) {
                $path = core_component::get_plugin_directory($plugintype, $plugin);
                $component = $plugintype . '_' . $plugin;
                $version = get_component_version($component);

                require_once("$path/db/mobile.php");
                foreach ($addons as $addonname => $addoninfo) {
                    $plugininfo = array(
                        'component' => $component,
                        'version' => $version,
                        'addon' => $addonname,
                        'dependencies' => !empty($addoninfo['dependencies']) ? $addoninfo['dependencies'] : array(),
                        'fileurl' => '',
                        'filehash' => '',
                        'filesize' => 0
                    );

                    // All the mobile packages must be under the plugin mobile directory.
                    $package = $path . DIRECTORY_SEPARATOR . 'mobile' . DIRECTORY_SEPARATOR . $addonname . '.zip';
                    if (file_exists($package)) {
                        $plugininfo['fileurl'] = $CFG->wwwroot . '' . str_replace($CFG->dirroot, '', $package);
                        $plugininfo['filehash'] = sha1_file($package);
                        $plugininfo['filesize'] = filesize($package);
                    }
                    $pluginsinfo[] = $plugininfo;
                }
            }
        }
        return $pluginsinfo;
    }

    /**
     * Returns a list of the site public settings, those not requiring authentication.
     *
     * @return array with the settings and warnings
     */
    public static function get_site_public_settings() {
        global $CFG, $SITE, $PAGE;

        $context = context_system::instance();
        // We need this to make work the format text functions.
        $PAGE->set_context($context);

        $settings = array(
            'wwwroot' => $CFG->wwwroot,
            'httpswwwroot' => $CFG->httpswwwroot,
            'sitename' => external_format_string($SITE->fullname, $context->id, true),
            'guestlogin' => $CFG->guestloginbutton,
            'rememberusername' => $CFG->rememberusername,
            'authloginviaemail' => $CFG->authloginviaemail,
            'registerauth' => $CFG->registerauth,
            'forgottenpasswordurl' => $CFG->forgottenpasswordurl,
            'authinstructions' => format_text($CFG->auth_instructions),
            'authnoneenabled' => (int) is_enabled_auth('none'),
            'enablewebservices' => $CFG->enablewebservices,
            'enablemobilewebservice' => $CFG->enablemobilewebservice,
            'maintenanceenabled' => $CFG->maintenance_enabled,
            'maintenancemessage' => format_text($CFG->maintenance_message),
        );
        return $settings;
    }

}