japji/resources/public/cljs/replicant_tictactoe/game.cljs
2025-09-01 12:49:14 +01:00

41 lines
1.3 KiB
Clojure

;; COPIED FROM https://github.com/cjohansen/replicant-tic-tac-toe/blob/7a33fb12f0cd6658b2f555ff673dee031d4aa921/src/tic_tac_toe/game.cljs
(ns replicant-tictactoe.game)
(defn create-game [{:keys [size]}]
{:next-player :x
:size size})
(def next-player {:x :o, :o :x})
(defn winner? [tics path]
(when (= 1 (count (set (map tics path))))
path))
(defn get-winning-path [{:keys [size tics]} y x]
(or (winner? tics (mapv #(vector y %) (range 0 size)))
(winner? tics (mapv #(vector % x) (range 0 size)))
(when (= y x)
(winner? tics (mapv #(vector % %) (range 0 size))))))
(defn maybe-conclude [game y x]
(if-let [path (get-winning-path game y x)]
(-> (dissoc game :next-player)
(assoc :over? true
:victory {:player (get-in game [:tics [y x]])
:path path}))
(let [tie? (= (count (:tics game)) (* (:size game) (:size game)))]
(cond-> game
tie? (dissoc :next-player)
tie? (assoc :over? true)))))
(defn tic [game y x]
(let [player (:next-player game)]
(if (or (get-in game [:tics [y x]])
(<= (:size game) x)
(<= (:size game) y))
game
(-> game
(assoc-in [:tics [y x]] player)
(assoc :next-player (next-player player))
(maybe-conclude y x)))))