Joe Cardle scored a hat-trick to fire Dunfermline to the top of Ladbrokes League One after a 4-0 win over previous leaders Forfar.Cardle opened the scoring in the fourth minute when he swept Michael Paton's cross from the right past Rab Douglas.And he doubled the advantage in first-half stoppage time when his shot squeezed past Douglas and over the line.Cardle wasted the opportunity to get his hat-trick in the 65th minute when Douglas made amends for giving away a penalty by saving Cardle's effort.However, Cardle made up for it four minutes later when he converted a Faissal El Bakhtaoui pass.Andy Geggan then wrapped up victory in stoppage time when he headed home Ryan Wallace's corner.