<?php

/*
 * This file is part of GNU social - https://www.gnu.org/software/social
 *
 * GNU social is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GNU social 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * Main GNU social entry point
 *
 * @package   GNUsocial
 * @category  Framework
 *
 * StatusNet and GNU social 1
 *
 * @author    Refer to CREDITS.md
 * @copyright 2010 Free Software Foundation, Inc http://www.fsf.org
 *
 * GNU social 2
 * @author    Bruno Casteleiro <brunoccast@fc.up.pt>
 * @author    Diogo Cordeiro <diogo@fc.up.pt>
 *
 * GNU social 3
 * @author    Hugo Sales <hugo@fc.up.pt>
 * @copyright 2018-2020 Free Software Foundation, Inc http://www.fsf.org
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */

namespace App\Util;

use Psr\Container\ContainerInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\Console\Event\ConsoleCommandEvent;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Contracts\Translation\TranslatorInterface;

class GNUsocial implements EventSubscriberInterface
{
    protected ContainerInterface $container;
    protected LoggerInterface $logger;
    protected TranslatorInterface $translator;

    /**
     * Symfony dependency injection gives us access to these services
     *
     * @param ContainerInterface  $container
     * @param LoggerInterface     $logger
     * @param TranslatorInterface $translator
     */
    public function __construct(ContainerInterface $container,
                                LoggerInterface $logger,
                                TranslatorInterface $translator)
    {
        $this->container  = $container;
        $this->logger     = $logger;
        $this->translator = $translator;
    }

    /**
     * Store these services to be accessed statically and load modules
     *
     * @param EventDispatcherInterface $event_dispatcher
     */
    public function register(EventDispatcherInterface $event_dispatcher): void
    {
        Log::setLogger($this->logger);
        GSEvent::setDispatcher($event_dispatcher);
        I18n::setTranslator($this->translator);
        ModulesManager::loadModules();
    }

    /**
     * Event very early on in the Symfony HTTP lifecycle, but after everyting is registered
     * where we get access to the event dispatcher
     *
     * @param RequestEvent             $event
     * @param string                   $event_name
     * @param EventDispatcherInterface $event_dispatcher
     *
     * @return RequestEvent
     */
    public function onKernelRequest(RequestEvent $event,
                                    string $event_name,
                                    EventDispatcherInterface $event_dispatcher): RequestEvent
    {
        $this->register($event_dispatcher);
        return $event;
    }

    /**
     * Event after everything is initialized when using the `bin/console` command
     *
     * @param ConsoleCommandEvent      $event
     * @param string                   $event_name
     * @param EventDispatcherInterface $event_dispatcher
     *
     * @return ConsoleCommandEvent
     */
    public function onCommand(ConsoleCommandEvent $event,
                              string $event_name,
                              EventDispatcherInterface $event_dispatcher): ConsoleCommandEvent
    {
        $this->register($event_dispatcher);
        return $event;
    }

    /**
     * Tell Symfony which events we want to listen to, which Symfony detects and autowires
     * due to this implementing the `EventSubscriberInterface`
     */
    public static function getSubscribedEvents()
    {
        return [
            KernelEvents::REQUEST => 'onKernelRequest',
            'console.command'     => 'onCommand',
        ];
    }
}