complexity-final-example.php

<?php

class Post
{
    protected $sidebarTypes = [8, 11];

    protected $authorEditTimeout = 2592000;

    ...

    public function canEdit(User $user) : bool
    {
        if ($user->isAdmin()) {
            return true;
        }

        if ($user->isSupervisor() && $this->isSidebarPost()) {
            return true;
        }

        if ($user->isEditor() && $this->isEditedBy($user)) {
            return true;
        }

        if ($this->isAuthoredBy($user) && !$this->isTooOldToEdit()) {
            return true;
        }

        return false;
    }

    ...

    public function isAuthoredBy(User $author) : bool
    {
        return $this->author->getId() === $author->getId();
    }

    public function isEditedBy(User $editor) : bool
    {
        return $this->editor->getId() === $editor->getId();
    }

    public function isSidebarPost() : bool
    {
        return in_array($this->type, self::$sidebarTypes);
    }

    public function isTooOldToEdit() : bool
    {
        return $this->created_at < (time() — self::$authorEditTimeout);
    }
}

class User
{
    const ROLE_EDITOR     = 3;
    const ROLE_SUPERVISOR = 4;
    const ROLE_ADMIN      = 5;

    public function isEditor() : bool
    {
        return $this->role == self::ROLE_EDITOR;
    }

    public function isSupervisor() : bool
    {
        return $this->role == self::ROLE_SUPERVISOR;
    }

    public function isAdmin() : bool
    {
        return $this->role == self::ROLE_SUPERVISOR;
    }
}