Extending assets finder in Touch UI edit mode

[#1]

I am trying to extend the assets finder logic in the touch ui edit mode (AEM 6.3 in this case). For example: add another dropdown under 'Select Tag(s)'. I am unable to find any up to date resources on where to find the file/structure that builds this panel. Your help is greatly appreciated, thanks in advance!

[#2 · Accepted solution]

Check search predicates under: /libs/cq/gui/components/coral/common/admin/customsearch/searchpredicates. It has all the corresponding JSPs

[#3]

I can see the list of facets but I cannot find a link with their jsp's, where are those located? I need this for the new Touch UI, not the old editor.

[#4]

See the AEM docs here - they may help -- Extending Assets Search