JSON to PHP 8.2+ Typed Readonly DTO Generator

<?php

declare(strict_types=1);

namespace App\DTO;

/**
 * @param string[] $tags
 */
final readonly class UserDto implements \JsonSerializable
{
    public function __construct(
        public string $id,
        public string $email,
        public string $username,
        public string $displayName,
        public string $role,
        public bool $isActive,
        public TenantDto $tenant,
        public PreferencesDto $preferences,
        /** @var string[] */
        public array $tags = [],
        public \DateTimeImmutable $lastLoginAt,
        public \DateTimeImmutable $createdAt,
    ) {}

    public static function fromArray(array $data): self
    {
        return new self(
            id: (string) ($data['id'] ?? $data['id'] ?? null ?? ''),
            email: (string) ($data['email'] ?? $data['email'] ?? null ?? ''),
            username: (string) ($data['username'] ?? $data['username'] ?? null ?? ''),
            displayName: (string) ($data['display_name'] ?? $data['displayName'] ?? null ?? ''),
            role: (string) ($data['role'] ?? $data['role'] ?? null ?? ''),
            isActive: (bool) ($data['is_active'] ?? $data['isActive'] ?? null ?? false),
            tenant: TenantDto::fromArray((array) ($data['tenant'] ?? [])),
            preferences: PreferencesDto::fromArray((array) ($data['preferences'] ?? [])),
            tags: array_map(fn($item) => (string) $item, (array) ($data['tags'] ?? [])),
            lastLoginAt: isset($data['last_login_at']) ? new \DateTimeImmutable((string) $data['last_login_at']) : null,
            createdAt: isset($data['created_at']) ? new \DateTimeImmutable((string) $data['created_at']) : null,
        );
    }

    public function toArray(): array
    {
        return [
            'id' => $this->id,
            'email' => $this->email,
            'username' => $this->username,
            'display_name' => $this->displayName,
            'role' => $this->role,
            'is_active' => $this->isActive,
            'tenant' => $this->tenant->toArray(),
            'preferences' => $this->preferences->toArray(),
            'tags' => $this->tags,
            'last_login_at' => $this->lastLoginAt?->format(\DateTimeInterface::ATOM),
            'created_at' => $this->createdAt?->format(\DateTimeInterface::ATOM),
        ];
    }

    public function jsonSerialize(): array
    {
        return $this->toArray();
    }
}

final readonly class TenantDto implements \JsonSerializable
{
    public function __construct(
        public string $id,
        public string $name,
        public string $tier,
        public int $activeSeats,
        public string $billingContact,
    ) {}

    public static function fromArray(array $data): self
    {
        return new self(
            id: (string) ($data['id'] ?? $data['id'] ?? null ?? ''),
            name: (string) ($data['name'] ?? $data['name'] ?? null ?? ''),
            tier: (string) ($data['tier'] ?? $data['tier'] ?? null ?? ''),
            activeSeats: (int) ($data['active_seats'] ?? $data['activeSeats'] ?? null ?? 0),
            billingContact: (string) ($data['billing_contact'] ?? $data['billingContact'] ?? null ?? ''),
        );
    }

    public function toArray(): array
    {
        return [
            'id' => $this->id,
            'name' => $this->name,
            'tier' => $this->tier,
            'active_seats' => $this->activeSeats,
            'billing_contact' => $this->billingContact,
        ];
    }

    public function jsonSerialize(): array
    {
        return $this->toArray();
    }
}

final readonly class PreferencesDto implements \JsonSerializable
{
    public function __construct(
        public string $theme,
        public bool $notificationsEnabled,
        public string $locale,
        public string $timezone,
    ) {}

    public static function fromArray(array $data): self
    {
        return new self(
            theme: (string) ($data['theme'] ?? $data['theme'] ?? null ?? ''),
            notificationsEnabled: (bool) ($data['notifications_enabled'] ?? $data['notificationsEnabled'] ?? null ?? false),
            locale: (string) ($data['locale'] ?? $data['locale'] ?? null ?? ''),
            timezone: (string) ($data['timezone'] ?? $data['timezone'] ?? null ?? ''),
        );
    }

    public function toArray(): array
    {
        return [
            'theme' => $this->theme,
            'notifications_enabled' => $this->notificationsEnabled,
            'locale' => $this->locale,
            'timezone' => $this->timezone,
        ];
    }

    public function jsonSerialize(): array
    {
        return $this->toArray();
    }
}