I have a class in php that works with the chainning method, but the problem is that I want to chain the methods in some order.
class Chain {
public function foo () {
return $this;
}
public function bar () {
return $this;
}
public function some () {
return $this;
}
}
So, if I use this class, then I can chain this methods in 9 different ways (all the possible combinations of 3 elements)
But what happen if I determine that the method some
always must to be chained after foo
or bar
and not in other way?
$chain = new Chain();
$chain->foo->bar(); //works; i.e: the method some is optional
$chain->foo()->bar()->some(); //works
$chain->bar()->foo()->some(); //works
$chain->some()->bar()->foo(); //throws an exception
I think that I can do this setting boolean values, something like: when the method foo
or bar
are called, then I set the value to some var to true
, and when the developer calls the some
function, if that var is false
, then throws an exception, otherwise is allowed to continue.
But I need something more elegant, such as pattern or a built-in solution.
There is another way to do it?