Convert to hyperlink whenever enter filename in active cell google script

I have a sheet named "Source" which contains the below columns:A --> filename,B --> link.

I would like to create a google script that whenever I insert filename into a cell of an active sheet, it will automatically convert that cell to a hyperlink by looking up the link from "Source" sheet).

I have tried searching from many forums, but I can't find one that fits my purpose. Any help, please.