Get the path of the frontmost Finder window. If it is within the user’s folder, replace the `/Users/USERNAME/` with `~/` so that the path can be shared with others.

get_frontmost_finder_path.applescript

tell application "Finder"
  tell application "System Events" to set current_user to name of current user
	set AppleScript's text item delimiters to "/Users/" & current_user
	try
		return "~" & text item 2 of POSIX path of (target of front Finder window as text)
	on error
		return POSIX path of (target of front Finder window as text)
	end try
end tell