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(in-package :remote-snake-server-api)
(defclass game-manager ()
((games
:initform '())
(next-id
:initform 0)))
(defgeneric create-game (gm)
(:documentation "Create a game in the Game Manager."))
(defmethod print-object :around ((gm game-manager) stream)
(with-slots (games) gm
(format stream "Games: ~a" games)))
(defgeneric delete-game (gm game-id)
(:documentation "Delete a game from Game Manager."))
(defgeneric get-game (gm game-id)
(:documentation "Fetch a game from Game Manager."))
(defmethod delete-game ((gm game-manager) game-id)
(get-game gm game-id) ; First try to get the game (if not found, an error will be raised)
(with-slots (games) gm
(setf games (remove-if #'(lambda (entry) (eql game-id (getf entry :id))) games))))
(defmethod get-game ((gm game-manager) game-id)
(with-slots (games) gm
(let ((game (remove-if-not #'(lambda (entry) (eql game-id (getf entry :id))) games)))
(when (< (length game) 1) (error "Game ~a not found !" game-id))
(getf (first game) :game))))
;;; Create a new game in gm and return its id
(defmethod create-game ((gm game-manager))
(let ((new-game-id nil))
(with-slots (games next-id) gm
(push (list :id next-id :game (make-instance 'game)) games)
(setf new-game-id next-id)
(incf next-id))
new-game-id))
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