<?php

use FramJet\Packages\EnumBitmask\BitmaskFunctionality;

enum Flag: int
{
    use BitmaskFunctionality;

    case Public = 0b000001;
    case Protected = 0b000010;
    case Private = 0b000100;
    case ReadOnly = 0b001000;
    case Static = 0b010000;
    case Final = 0b100000;
}

class Member
{
    public function __construct(private int $flags = 0)
    {
    }

    public function setPublic(): void
    {
        $this->flags = Flag::set(
            Flag::clear($this->flags, Flag::Private, Flag::Protected),
            Flag::Public
        );
    }

    public function isPublic(): bool
    {
        return Flag::on($this->flags, Flag::Public);
    }

    public function isReadOnly(): bool
    {
        return Flag::on($this->flags, Flag::ReadOnly);
    }

    /** @return list<Flag> */
    public function getFlags(): array
    {
        return Flag::parse($this->flags);
    }

    public function getFlagsValue(): int
    {
        return $this->flags;
    }
}

class Container
{
    /** @param list<Member> $members */
    public function __construct(private array $members = [])
    {
    }

    public function addMember(Member $member): void
    {
        $this->members[] = $member;
    }

    public function getMembers(Flag ...$flags): array
    {
        return array_filter($this->members, static fn(Member $m) => Flag::any($m->getFlagsValue(), ...$flags));
    }
}

$memberPublic = new Member();
$memberPublic->setPublic();

$memberPublic->getFlags(); // [Flag::Public]

$memberReadOnly = new Member(Flag::build(Flag::ReadOnly));

$memberReadOnly->isReadOnly(); // true
$memberReadOnly->isPublic();   // false

$memberPrivate = new Member(Flag::build(Flag::Private, Flag::ReadOnly));

$memberPrivate->isReadOnly(); // true
$memberPrivate->isPublic();   // false
$memberPrivate->getFlags();   // [Flag::Private, Flag::ReadOnly]

array_map(
    static fn(Flag $f) => $f->toString(),
    $memberPrivate->getFlags()
); // ['0b0000_0000_0000_0000_0000_0000_0000_0100', '0b0000_0000_0000_0000_0000_0000_0000_1000']

$container = new Container();
$container->addMember($memberPublic);
$container->addMember($memberReadOnly);
$container->addMember($memberPrivate);

$container->getMembers();                             // [$memberPublic, $memberReadOnly, $memberPrivate]
$container->getMembers(Flag::Public);                 // [$memberPublic]
$container->getMembers(Flag::ReadOnly);               // [$memberReadOnly, $memberPrivate]
$container->getMembers(Flag::ReadOnly, Flag::Public); // [$memberPublic, $memberReadOnly, $memberPrivate]