Hooking InputfieldFile::renderItem

[Pete]

Hi guys

I want to hook and replace the output of InputfieldFile's renderItem function as I want to change the output in a module but only for one template (narrowing down the template is the easy part). The idea is I don't want to have a whole new module just for changing the output on one template in the admin.

My problem is that I need the same 3 arguments the original funciton has and I'm just not sure how to go about it:

protected function ___renderItem($pagefile, $id, $n) {

Any ideas?

I got as far as this:

$this->addHookBefore("InputfieldFile::renderItem", $this, "renderFile");

and in my renderFile function I did this:

public function renderField(HookEvent $event) {
$inputfield = $event->object;
if($this->page->template != 'admin' || !$inputfield instanceof InputfieldFile || $this->input->urlSegment1 != 'attach') return; // 'attach' is the urlsegment I'm looking out for in my ProcessModule as it's that particular page on the module I want to alter the file field's markup for
   ...
}

But then I don't know how to get $id and $n from the original function... any ideas?

[horst]

It works as always with params:

        $inputfield = $event->object;
        $pagefile = $event->arguments(0);
        $id = $event->arguments(1);
        $n = $event->arguments(2);

[Soma]

Or better named

$pagefile = $event->arguments("pagefile");
$id = $event->arguments("id");
$n = $event->arguments("n");

[horst]

Or better named

I'm a lazy writer. But you are right, named is more future save.

[Pete]

Thanks guys, seems really obvious now

[Soma]

Yeah it's one of the few things I remember without thinking.

[Pete]

I certainly won't be forgetting it in a hurry

Just a quick one - is there any way/need to ever display the object equivalent of array_keys? Usually ends in recursion on objects in ProcessWire, but I can never remember when $page is $event->object or $event->arguments[0] etc etc. Is there an idiot's guide list to which one is available depending on where you're hooking?

I mean basically the stuff like the $page object that isn't necessarily as obvious as a parameter as to how to access that data.

[Soma]

If you look at the hooking method and you see the arguments it is always clearer. If theres a $page you need to use arguments. But in cases if you hook the class Page you get the page with $event->object.

[Pete]

I'm with you now - thanks Soma.

[LostKobrakai]

Also quite useful: When hooking ProcessPageEdit the edited page is $event->object->getPage();