When should I return?
I am struggling to create an access object to sections stored in the Database. This is a skellington of the process, this contains static data until I can get the principle working.
class User {
const IS_ADMIN = 1;
const IS_MODERATOR = 2;
const IS_MEMBER = 4;
}
This class will auto-load data from the database eventually but for the time being, this class has default values.
class Scope {
private $priv = [];
public function __construct() {
$this->priv = [1];
}
public function getPrivilidges() {
return $this->priv;
}
}
This is where it messes up, I can tell that the second and third conditions cannot be met if the first fails, how can I stop this?
class Priverlidges {
public function canView($type, Scope $scope) {
if($type & User::IS_ADMIN) {
foreach($scope->getPrivilidges() as $p) {
if($p == User::IS_ADMIN) continue;
return false;
}
return true;
}
if($type & User::IS_MODERATOR) {
foreach($scope->getPrivilidges() as $p) {
if($p == User::IS_MODERATOR) continue;
return false;
}
return true;
}
if($type & User::IS_MEMBER) {
foreach($scope->getPrivilidges() as $p) {
if($p == User::IS_MEMBER) continue;
return false;
}
return true;
}
}
}
Example usage which works fine when the default value of the priverlidge is 1:
echo (int)(new Priverlidges)->canView(User::IS_ADMIN, new Scope());
Example usage which works fine when the default value of the priverlidge is 2:
echo (int)(new Priverlidges)->canView(User::IS_MODERATOR | User::IS_ADMIN, new Scope()); // it returns false at the first condition
Can anyone help me with when to return true or false? Thanks in advance.
PS - Users can be both Mods and Admins
EDIT: I have tried to use in_array()
and still am unsure when to return the value true
or false
because it get's overwrite if the second method runs.
I figured it out. First, check the user is not already authenticated using a placeholder ( $this->_state
). Then check the type of user and check it is inside the scope.
class Priverlidges {
private $_state = false;
public function canView($type, Scope $scope) {
if(!$this->_state && $type & User::IS_ADMIN && in_array(User::IS_ADMIN, $scope->getPrivilidges())) {
$this->_state = true;
}
if(!$this->_state && $type & User::IS_MODERATOR && in_array(User::IS_MODERATOR, $scope->getPrivilidges())) {
$this->_state = true;
}
if(!$this->_state && $type & User::IS_MEMBER && in_array($scope->getPrivilidges(), User::IS_MEMBER)) {
$this->_state = true;
}
return $this->_state;
}
}
链接地址: http://www.djcxy.com/p/58874.html
上一篇: 管理员角色只能通过身份验证
下一篇: 我应该什么时候回来?