singleloginsystem/app/Services/UserService.php

<?php

declare(strict_types=1);

namespace App\Services;

use App\Data\Permissions\DeactivatedPermissionData;
use App\Data\User\UserIndexData;
use App\Models\{RestrictedUserPermission, User};
use Illuminate\Support\Facades\DB;
use InvalidArgumentException;
use NoDiscard;
use Spatie\LaravelData\{DataCollection, PaginatedDataCollection};
use Throwable;

final class UserService
{
    /**
     * Returns a Paginated Collection of users with their roles and connected apps DTO
     *
     * @return PaginatedDataCollection<int, UserIndexData>
     */
    #[NoDiscard]
    public function getAll(): PaginatedDataCollection
    {
        $users = User::query()
            ->with([
                'roles:id,name,priority',
                'roles.apps:id,name',
                'roles.permissions:id,name',
                'restrictedPermissions',
            ])
            ->orderBy('id')
            ->paginate();

        return UserIndexData::collect($users, PaginatedDataCollection::class);
    }

    /**
     * Get the restricted permission IDs for a user.
     *
     * @return array<int>
     */
    public function getRestrictedPermissionIds(int $userId): array
    {
        if ($userId <= 0) {
            return [];
        }

        return RestrictedUserPermission::query()
            ->where('user_id', $userId)
            ->pluck('permission_id')
            ->toArray();
    }

    /**
     * Assign roles to a user.
     */
    public function assignRoles(int $userId, array $roleIds): void
    {
        if ($userId <= 0) {
            throw new InvalidArgumentException('Invalid id');
        }

        DB::transaction(function () use ($userId, $roleIds): void {
            $user = User::query()->findOrFail($userId);

            $userPriority = auth()->user()?->roles()->min('priority') ?? 999999;

            // Get user's existing roles that have priority <= $userPriority (which are forbidden to the logged in user)
            $forbiddenRoleIds = $user->roles()
                ->where('priority', '<=', $userPriority)
                ->pluck('id')
                ->toArray();

            // Merge them with the newly assigned roles so they are preserved
            $mergedRoleIds = array_values(array_unique(array_merge($forbiddenRoleIds, $roleIds)));

            $user->syncRoles($mergedRoleIds);
        });
    }

    /**
     * Sync restricted permissions for a user.
     *
     * @param  DataCollection<int, DeactivatedPermissionData>  $deactivatedPermissions
     *
     * @throws Throwable
     */
    public function syncRestrictedPermissions(int $userId, DataCollection $deactivatedPermissions): void
    {
        if ($userId <= 0) {
            throw new InvalidArgumentException('Invalid user ID');
        }

        $payload = $deactivatedPermissions->toCollection()->map(fn ($data) => [
            'user_id' => $userId,
            'role_id' => $data->roleId,
            'permission_id' => $data->permissionId,
        ])->toArray();

        DB::transaction(function () use ($userId, $payload): void {

            RestrictedUserPermission::query()
                ->where('user_id', $userId)
                ->delete();

            if (! empty($payload)) {
                RestrictedUserPermission::query()->insert($payload);
            }

        });
    }

    /**
     * @throws InvalidArgumentException when id is invalid.
     * @throws Throwable when an error occurs during the deletion.
     */
    public function delete(int $id): void
    {
        if ($id <= 0) {
            throw new InvalidArgumentException('Invalid id');
        }

        DB::transaction(function () use ($id): void {
            $user = User::query()->findOrFail($id);

            $userPriority = auth()->user()?->roles()->min('priority') ?? 999999;
            $targetUserMinPriority = $user->roles()->min('priority') ?? 999999;

            if ($targetUserMinPriority <= $userPriority) {
                abort(403, 'Unauthorized to delete this user due to role priority hierarchy.');
            }

            $user->delete();
        });
    }
}