Foyle's contract at the Valiants runs out in the summer, but he has been holding talks over an extension.
And Bratt said: "We're hoping to have something signed and sealed by the end of this week.
"Martin genuinely cares for Port Vale and we are happy with the direction he is taking the club.
"We are a family club, and work in partnership with the community perhaps more than any other club, and Martin and the rest of the coaching staff are a key part of that ethos."