Habari\Post::get_access PHP Method

    public function get_access($user = null)
    {
        static $cached_access = array();
        if (!$user instanceof User) {
            $user = User::identify();
        }
        if (!isset($access[$this->id])) {
            $cached_access[$this->id] = array();
        }
        if (isset($cached_access[$this->id][$user->id])) {
            return $cached_access[$this->id][$user->id];
        }
        if ($user->can('super_user')) {
            $cached_access[$this->id][$user->id] = ACL::get_bitmask('full');
            return $cached_access[$this->id][$user->id];
        }
        // Collect a list of applicable tokens
        $tokens = array('post_any', 'post_' . Post::type_name($this->content_type));
        if ($user->id == $this->user_id) {
            $tokens[] = 'own_posts';
        }
        $tokens = array_merge($tokens, $this->get_tokens());
        // collect all possible token accesses on this post
        $token_accesses = array();
        foreach ($tokens as $token) {
            $access = ACL::get_user_token_access($user, $token);
            if ($access instanceof Bitmask) {
                $token_accesses[] = ACL::get_user_token_access($user, $token)->value;
            }
        }
        // now that we have all the accesses, loop through them to build the access to the particular post
        if (in_array(0, $token_accesses)) {
            $cached_access[$this->id][$user->id] = ACL::get_bitmask(0);
            return $cached_access[$this->id][$user->id];
        }
        $cached_access[$this->id][$user->id] = ACL::get_bitmask(Utils::array_or($token_accesses));
        return $cached_access[$this->id][$user->id];
    }