API does not have Calculate Delta Date function.

[nihadness]

Current behavior before PR

'calculate_delta_date' function is missing.

--
I confirm I have tested the PR thoroughly and coded it according to PEP8
standards.

[nihadness]

I just copied the function from Plone and it is only used when getting query values for 'recent_modified' and 'recent_created' parameters. And I think it would better to create a new function and handle those values in a different way. Instead of getting string and converting them to integer, users can send integer values which can show date difference in days. In that case we would be able to query objects that have been modified during last 3 days for example.

[ramonski]

Thanks for porting this function. Good idea to have a request parameter that takes days as integers.However, take care that you don't "mask" existing catalog indexes (request parameters are matched against existing catalog indexes...)