<?php
/**
 * 家庭：数据空间的根，所有名册条目都挂在它下面。
 */

declare(strict_types=1);

namespace App;

final class Family
{
    public static function find(int $id): ?array
    {
        $st = Database::get()->prepare('SELECT * FROM families WHERE id = ?');
        $st->execute([$id]);
        $row = $st->fetch();
        return $row ?: null;
    }

    public static function create(string $name, string $motto = ''): int
    {
        $st = Database::get()->prepare('INSERT INTO families (name, motto) VALUES (?, ?)');
        $st->execute([$name, $motto !== '' ? $motto : null]);
        return (int)Database::get()->lastInsertId();
    }

    public static function update(int $id, string $name, string $motto = ''): void
    {
        $st = Database::get()->prepare('UPDATE families SET name = ?, motto = ? WHERE id = ?');
        $st->execute([$name, $motto !== '' ? $motto : null, $id]);
    }

    public static function countMembers(int $familyId): int
    {
        $st = Database::get()->prepare(
            "SELECT COUNT(*) FROM persons WHERE family_id = ? AND kind = 'member'"
        );
        $st->execute([$familyId]);
        return (int)$st->fetchColumn();
    }
}