<?php
/**
 * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
 *
 * Copyright (C) 2019 - 2022 Jan Böhmer (https://github.com/jbtronics)
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace App\EntityListeners;

use App\Entity\Base\AbstractDBElement;
use App\Entity\Base\AbstractStructuralDBElement;
use App\Entity\LabelSystem\LabelProfile;
use App\Entity\UserSystem\Group;
use App\Entity\UserSystem\User;
use App\Services\UserSystem\UserCacheKeyGenerator;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Mapping as ORM;
use function get_class;
use Symfony\Contracts\Cache\TagAwareCacheInterface;

class TreeCacheInvalidationListener
{
    protected TagAwareCacheInterface $cache;
    protected UserCacheKeyGenerator $keyGenerator;

    public function __construct(TagAwareCacheInterface $treeCache, UserCacheKeyGenerator $keyGenerator)
    {
        $this->cache = $treeCache;
        $this->keyGenerator = $keyGenerator;
    }

    /**
     * @ORM\PostUpdate()
     * @ORM\PostPersist()
     * @ORM\PostRemove()
     */
    public function invalidate(AbstractDBElement $element, LifecycleEventArgs $event): void
    {
        //If an element was changed, then invalidate all cached trees with this element class
        if ($element instanceof AbstractStructuralDBElement || $element instanceof LabelProfile) {
            $secure_class_name = str_replace('\\', '_', get_class($element));
            $this->cache->invalidateTags([$secure_class_name]);

            //Trigger a sidebar reload for all users (see SidebarTreeUpdater service)
            if(!$element instanceof LabelProfile) {
                $this->cache->invalidateTags(['sidebar_tree_update']);
            }
        }

        //If a user change, then invalidate all cached trees for him
        if ($element instanceof User) {
            $secure_class_name = str_replace('\\', '_', get_class($element));
            $tag = $this->keyGenerator->generateKey($element);
            $this->cache->invalidateTags([$tag, $secure_class_name]);
        }

        /* If any group change, then invalidate all cached trees. Users Permissions can be inherited from groups,
            so a change in any group can cause big permisssion changes for users. So to be sure, invalidate all trees */
        if ($element instanceof Group) {
            $tag = 'groups';
            $this->cache->invalidateTags([$tag]);
        }
    }
}