<?php

declare(strict_types=1);

/**
 * vim:set softtabstop=4 shiftwidth=4 expandtab:
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPL-3.0-or-later)
 * Copyright Ampache.org, 2001-2024
 *
 * 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/>.
 *
 */

namespace Ampache\Repository;

use Ampache\Module\System\Dba;

final class UserFollowerRepository implements UserFollowerRepositoryInterface
{
    /**
     * Get users following the user
     *
     * @return int[]
     */
    public function getFollowers(int $userId): array
    {
        $sql        = "SELECT `user` FROM `user_follower` WHERE `follow_user` = ?";
        $db_results = Dba::read($sql, [$userId]);
        $results    = [];
        while ($row = Dba::fetch_assoc($db_results)) {
            $results[] = (int) $row['user'];
        }

        return $results;
    }

    /**
     * Get users followed by this user
     *
     * @return int[]
     */
    public function getFollowing(int $userId): array
    {
        $sql        = "SELECT `follow_user` FROM `user_follower` WHERE `user` = ?";
        $db_results = Dba::read($sql, [$userId]);
        $results    = [];
        while ($row = Dba::fetch_assoc($db_results)) {
            $results[] = (int) $row['follow_user'];
        }

        return $results;
    }

    /**
     * Get if a user is followed by another user
     */
    public function isFollowedBy(int $userId, int $followingUserId): bool
    {
        $sql        = "SELECT `id` FROM `user_follower` WHERE `user` = ? AND `follow_user` = ?";
        $db_results = Dba::read($sql, array($followingUserId, $userId));

        return Dba::num_rows($db_results) > 0;
    }

    public function add(
        int $userId,
        int $followingUserId
    ): void {
        Dba::write(
            "INSERT INTO `user_follower` (`user`, `follow_user`, `follow_date`) VALUES (?, ?, ?)",
            [
                $followingUserId,
                $userId,
                time()
            ]
        );
    }

    public function delete(
        int $userId,
        int $followingUserId
    ): void {
        Dba::write(
            "DELETE FROM `user_follower` WHERE `user` = ? AND `follow_user` = ?",
            [
                $followingUserId,
                $userId,
            ]
        );
    }
}
