[TYPO3-calendar] Hide prev/next links in month view, if out of range

[Ben Robinson]

Hello, everybody.

is it possible to hide the prev and next links of the month view (###PREV_MONTHLINK### / ###NEXT_MONTHLINK###) if they are not in the given time range (start/endLinkRange)?

Also I would like to get old results out of the search engine's index.
I already found out that there's a hard coded "additionalHeaderData", if a page is not in the given range:
Classes/Controller/Controller.php - line 287:

if ($this->conf ['getdate'] <= date ('Ymd', strtotime ($this->conf ['view.'] ['startLinkRange'])) || $this->conf ['getdate'] >= date ('Ymd', strtotime ($this->conf ['view.'] ['endLinkRange']))) {
	// Set additional META-Tag for google et al
	$GLOBALS ['TSFE']->additionalHeaderData ['cal'] = '<meta name="robots" content="index,nofollow" />';
			
	// Set / override no_search for current page-object
	$GLOBALS ['TSFE']->page ['no_search'] = 0;
}

But I'm already usinig …

	page.meta.robots = index, follow
[page|no_search = 1]
	page.meta.robots = noindex, nofollow
[global]

… so the additionalHeaderData creates an additional robots-meta-tag.
Is it possible to override my TypoScript via Controller.php or define a constant, which could be used to extend my TS-condition? For example:

$GLOBALS ['TSFE']->page ['cal_out_of_range'] = 1;

[page|no_search = 1] || [page|cal_out_of_range= 1]
	page.meta.robots = noindex, nofollow
[global]

(the example does not work, unfortunately)


Thanks for your help.
Ben