ps_facetedsearch Add custom product field to ps_facetedsearch layered filter block

[MostofaBD]

Hello,
- I made a custom field `field_custom` to `{prefix}_product` tables and Product ( ObjectModel ) classes.

 

How could I, add this `field_custom` searchable and also available to layered navigation filter or integrate with module ps_facetedsearch ?

for reference i have added image as attachment

- is there any hook available for extending this functionalities?

- if no hook available, is there code fixing solution available there?

My steps for already , trying to catch the solution:

-  modified in  ps_facetedsearch.php , in function rebuildLayeredStructure()  added field_custom to {prefix}_layered_category tables `type` field enum type value

- in function , buildLayeredCategories()  added another conditions layered_selection_km_slider in $sqlInsert 

- in src/Filters/Block.php  added new switch case field_custom and made a function getFieldCustomRangeBlock()

now i stuck here.

any help will be appreciated.

thank you.