TYPO3 Core

In a domain model, I have an attribute "size" where the user should enter its body-size in cm, e.g. 179.

The model attribute is defined as protected int $size = 0;

If the user enters "1,79", the \TYPO3\CMS\Extbase\Property\TypeConverter\IntegerConverter throws the error "1,79" is no integer, which is right (Btw: this message is not translatable)

But if the user enters " 1.79 ", the value passes the check and is saved as value "1" in the database!

The reason is, that "1.79" as float value passes the is_numeric($source) check (failure 1) and even worse, its casted to int in return (int)$source resulting in the wrong value (failure 2).

I can't see an easy fix here, because is_integer() can't be used (it failed in multiple other places).

Current workaround:
In my case I can just replace the dot "." for the "size" argument and write it back to the request in inside the controller's initializeAction():

public function initializeExampleAction(): void
{
    $arguments = $this->request->getArguments();
    $arguments['user']['size'] = str_replace('.', '', $arguments['user']['size'] ?? '');
    $this->request = $this->request->withArguments($arguments);
}