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;;; model.lisp - 2025-02-14
;; Copyright (C) 2025 Aryadev Chavali
;; This program is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
;; FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
;; details.
;; You may distribute and modify this code under the terms of the GNU General
;; Public License Version 2, which you should have received a copy of along with
;; this program. If not, please go to <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Model of cards and sets of cards in Lisp.
;;; Code:
(in-package :cantedraw.model)
(deftype rank ()
`(or (member :Jack :Queen :King :Ace)
(integer 2 10)))
(deftype suit ()
`(member :Diamonds :Clubs :Hearts :Spades :Joker))
(deftype card () `(cons rank suit))
(deftype int-card () `(integer 0 51))
(fn cardsetp (lst) (-> (list) boolean)
(every #'(lambda (x) (typep x 'card)) lst))
(deftype cardset () `(and list (satisfies cardsetp)))
(fn int->suit (n) (-> (int-card) suit)
(case (floor n 13)
(0 :Diamonds)
(1 :Clubs)
(2 :Hearts)
(3 :Spades)
(t :Joker)))
(fn suit->int (item) (-> (suit) (integer 0 4))
(case item
(:Diamonds 0)
(:Clubs 1)
(:Hearts 2)
(:Spades 3)
(t 4)))
(fn int->rank (n) (-> (int-card) rank)
(case (mod n 13)
(0 :Ace)
(10 :Jack)
(11 :Queen)
(12 :King)
(t (+ n 1))))
(fn rank->int (rank) (-> (rank) (integer 0 12))
(case rank
(:Ace 0)
(:Jack 10)
(:Queen 11)
(:King 12)
(t (- rank 1))))
(fn int->card (num) (-> (int-card) card)
(cons (int->rank num)
(int->suit num)))
(fn card->int (card) (-> (card) int-card)
(destructuring-bind (rank . suit) card
(->> (suit->int suit)
(* 13)
(+ (rank->int rank)))))
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