Harry Potter Fans Only!!!?

How does Harry Potter get back the Maurader's Map in the Order of the Phoenix after losing it to imposter-Moody in the Goblet of Fire? Remeber he was on the stairs under the invisibility cloak, when "Moody" saw him through his magical eye, and kept Snape from seeing the piece of parchment, deciding to keep it from Harry. This helped him to find Barty Crouch Sr and Viktor Krum on the grounds of Hogwarts near the edge of the Forbidden Forest, and attack Crouch , stunning Krum. Points go to the first and best answer, thanks.