Extended filtering by date

[nilshoerrmann]

It would be great, if Kirby's date filtering capacity were enhanced. Currently, we are able to filter by dates like this (excluding custom filter functions):

$pages->filterBy('date',` '>', '2020-01-01');

The filter methods only allows string comparisons and thus doesn't allow for relative date definitions PHP is able to read, e. g. now or +6 months. Following this conversion on Slack, it would be nice to either add extra date comparisons to the core like

$pages->filterBy('date', 'date >', 'now');
$pages->filterBy('date', 'date <=', '+6 months');

or a specialized filter method like

$pages->filterByDate('date', '>', 'now');
$pages->filterByDate('date', '<=', '+6 months');

or a helper to convert relative date to strings like

$pages->filterBy('date', '>=', ymd('+6 months'));

where ymd() converts any time string to Y-m-d format.

[bastianallgeier]

✅