Start of chess board.

bases/do-blog/resources/public/index.html

@@ -6,6 +6,7 @@
     <meta charset="UTF-8">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.8.2/css/all.min.css" />
     <link rel="stylesheet" href="https://unpkg.com/tachyons@4.12.0/css/tachyons.min.css" />
+    <script src="https://cdn.tailwindcss.com"></script>
     <style type="text/css" media="screen">
         #loading {
             -webkit-animation: rotation 2s infinite linear;

bases/do-blog/src/com/oly/static_sites/do_blog/core.cljs

@@ -19,12 +19,13 @@
             ;; [henryw374.js-joda-locale_en-us]
             [com.oly.static-sites.do-blog.pages.helpers.database
              :refer [state document conn schema latest-article search-articles]]
-            [com.oly.static-sites.ui-hiccup.interface :refer [board square]]
-            [com.oly.static-sites.do-blog.pages.chess.render :refer [draw-board]]
-            [com.oly.static-sites.do-blog.pages.chess.state :refer [start-state]]
+            ;; [com.oly.static-sites.ui-hiccup.interface :refer [board square]]
+            ;; [com.oly.static-sites.do-blog.pages.chess.render :refer [draw-board]]
+            ;; [com.oly.static-sites.do-blog.pages.chess.state :refer [start-state]]
             [com.oly.static-sites.do-blog.pages.home :refer [home-page]]
             [com.oly.static-sites.do-blog.pages.article :refer [article-page]]
             [com.oly.static-sites.do-blog.pages.archive :refer [archive-page]]
+            [com.oly.static-sites.do-blog.pages.chess-board :refer [chess-page]]
             [com.oly.static-sites.do-blog.pages.about :refer [about-page]])
   (:require-macros [cl-eorg.macros :refer [org-doc->move-process inline-filelist-map]]))
 
@@ -92,6 +93,9 @@
      {:name :tags
       :view 'post
       :parameters {:path string?}}]
+    ["/chess"
+     {:name :chess
+      :view #'chess-page}]
     ["/about"
      {:name :about
       :view #'about-page}]
@@ -119,8 +123,7 @@
 
 (defn ui-search [search]
   [:div
-   (board 8 (draw-board
-             start-state))
+   
    
    [:input.w-100.center.input-reset.ba.b--black-20.pa2.mb2
     {:type "text"
@@ -181,6 +184,9 @@
                      [:li.lh-copy.pv3.b--black-30.ba.bt-0.bl-0.br-0
                       [:a.black.f3.link.hover-green
                        {:href (rfe/href :archive {:tag ""})} "Past articles"]]
+                     [:li.lh-copy.pv3.b--black-30.ba.bt-0.bl-0.br-0
+                      [:a.black.f3.link.hover-green
+                       {:href (rfe/href :chess)} "Chess"]]
                      [:li.lh-copy.pv3.b--black-30.ba.bt-0.bl-0.br-0
                       [:a.black.f3.link.hover-green
                        {:href (rfe/href :about)} "About"]]

bases/do-blog/src/com/oly/static_sites/do_blog/pages/chess/movement.cljs

@@ -1,60 +1,57 @@
 (ns com.oly.static-sites.do-blog.pages.chess.movement)
 
 (defn line-horizontal [[x y] size]
-  (loop [cords [[1 y]]]
-    (if (every? #(< % size) (-> cords last))
-      (recur (conj cords [(+ 1 (-> cords last first)) y]))
+  (loop [step 0
+         cords [[0 1 y]]]
+    (if (< (-> cords last second) size) 
+      (recur (+ step 1) (conj cords [step (+ 1 (-> cords last second)) y]))
       cords)))
 
 (defn line-vertical [[x y] size]
-  (loop [cords [[x 1]]]
-    (if (every? #(< % size) (-> cords last))
-      (recur (conj cords [x (+ 1 (-> cords last last))]))
+  (loop [step 0
+         cords [[0 x 1]]]
+    (if (< (-> cords last last) size) 
+      (recur (+ step 1) (conj cords [step x (+ 1 (-> cords last last))]))
       cords)))
 
 (defn line-projection [[x y] size]
   (concat (line-horizontal [x y] size)
           (line-vertical [x y] size)))
 
-(defn diagonal-start-ascending [x y]
-  [(+ 1 (- x (min x y)))
-   (+ 1 (- y (min x y)))])
-
-(defn diagonal-start-descending [x y]
-  [(+ x (- x y))
-   (- y (- x y))])
+(defn edge?
+  "Return true if x and are inside the grid"
+  [[_ x y]]
+   (and (and (< x 9) (< y 9))
+             (and (> x 0) (> y 0))))
 
 (defn diagonal-ascending
-  "down and to the right"
+"down and to the right"
   [[x y] size]
-  (let [lowest (min (- 8 x) (- 8 y))
-        highest (max x y)
-        start (diagonal-start-ascending x y)]
-    (loop [step lowest
-           cords [start]]
-      (if  (or (< step 8)
-               (every? #(< % 8) (-> cords last)))
-        (recur (+ step 1)
-               (conj cords [(+ (-> cords last first) 1)
-                            (+ (-> cords last last) 1)]))
-        cords))))
+  (loop [step 0
+         cords [[0 x y]]]
+    (if (or (edge? (or (-> cords pop peek) (-> cords last)) )  (edge? (-> cords last)))
+      (recur (+ step 1)
+             ;; generate 2 coordinates either side of actual position
+             (conj cords
+                   [step (+ x step)
+                    (+ y step)]
+                   [step (- x step)
+                    (- y step)]))
+      cords)))
 
 (defn diagonal-descending [[x y] size]
-  (let [highest (max x y)
-        start (diagonal-start-descending x y)]
-    (loop [step (+ 1 highest)
-           cords [start]]
-      (if  (or (> step 1)
-               (every? #(< % 1) (-> cords last)))
-        (recur (- step 1)
-               (conj cords [(+ (-> cords last first) 1)
-                            (- (-> cords last last) 1)]))
-        cords))))
-
-(defn diagonal [xy size direction]
-  (if (= direction :desc)
-    (diagonal-ascending xy size)
-    (diagonal-descending xy size)))
+  (loop [step 0
+         cords [[0 x y]]]
+    (if (or (edge? (or (-> cords pop peek) (-> cords last)) )
+             (edge? (-> cords last)))
+      (recur (+ step 1)
+             ;; generate 2 coordinates either side of actual position
+             (conj cords
+                   [step (+ x step)
+                    (- y step)]
+                   [step (- x step)
+                    (+ y step)]))
+      cords)))
 
 (defn diagonal-projection [[x y] size]
   (concat (diagonal-ascending [x y] size)
@@ -62,56 +59,73 @@
 
 (defn directional-projection [[x y] size]
   (concat (diagonal-projection [x y] size)
-          (line-projection [x y] 8)))
+          (line-projection [x y] size)))
 
 (defn star [[x y] size]
-  (loop [s 1
-         cords [[x y]]]
-    (case s
+  (loop [step 1
+         cords [[0 x y]]]
+    (case step
       3
-      (recur (+ s 1)
+      (recur (+ step 1)
              (conj cords
-                   ;[(- (-> cords first first) s) (-> cords first last)]
-                   [(- (-> cords first first) 2)  (+ (-> cords first last) 1)]
-                   [(- (-> cords first first) 2)  (- (-> cords first last) 1)]
+                   ;[(- (-> cords first second) s) (-> cords first last)]
+                   [step (- (-> cords first second) 2)  (+ (-> cords first last) 1)]
+                   [step (- (-> cords first second) 2)  (- (-> cords first last) 1)]
 
-                   ;[(+ (-> cords first first) s) (-> cords first last)]
-                   [(+ (-> cords first first) 2)  (- (-> cords first last) 1)]
-                   [(+ (-> cords first first) 2)  (+ (-> cords first last) 1)]
+                   ;[(+ (-> cords first second) s) (-> cords first last)]
+                   [step (+ (-> cords first second) 2)  (- (-> cords first last) 1)]
+                   [step (+ (-> cords first second) 2)  (+ (-> cords first last) 1)]
 
-                   [(+ (-> cords first first) 1) (- (-> cords first last) 2)]
-                   [(- (-> cords first first) 1) (- (-> cords first last) 2)]
+                   [step (+ (-> cords first second) 1) (- (-> cords first last) 2)]
+                   [step (- (-> cords first second) 1) (- (-> cords first last) 2)]
 
-                   [(- (-> cords first first) 1) (+ (-> cords first last) 2)]
-                   [(+ (-> cords first first) 1) (+ (-> cords first last) 2)]))
+                   [step (- (-> cords first second) 1) (+ (-> cords first last) 2)]
+                   [step (+ (-> cords first second) 1) (+ (-> cords first last) 2)]))
       4 cords
-      (recur (+ s 1)
-             (conj cords
-                   [(- (-> cords first first) s) (-> cords first last)]
-                   [(+ (-> cords first first) s) (-> cords first last)]
-                   [(-> cords first first)  (- (-> cords first last) s)]
-                   [(-> cords first first)  (+ (-> cords first last) s)])))))
+      (recur (+ step 1)
+             cords
+             #_(conj cords
+                   [step (- (-> cords first second) s) (-> cords first last)]
+                   [(+ (-> cords first second) s) (-> cords first last)]
+                   [(-> cords first second)  (- (-> cords first last) s)]
+                   [(-> cords first second)  (+ (-> cords first last) s)])))))
 
 (defn all-around-projection [[x y] size]
-  [[(- x 1) (+ 1 y)] [x (+ 1 y)] [(+ 1 x) (+ 1 y)]
-   [(- x 1) y] [(+ 1 x) y]
-   [(- x 1) (- y 1)] [x (- y 1)] [(+ 1 x) (- y 1)]])
+  [[0 (- x 1) (+ 1 y)] [0 x (+ 1 y)] [0 (+ 1 x) (+ 1 y)]
+   [0 (- x 1) y] [0 (+ 1 x) y]
+   [0 (- x 1) (- y 1)] [0 x (- y 1)] [0 (+ 1 x) (- y 1)]])
 
 (defn pawn-projection [[x y] direction size]
   (if (or (= y 2) (= y 7))
-    [[x (+ y direction)] [x (+ y (* 2 direction))]]
-    [[x (+ y direction)]]))
+    [[0 x (+ y direction)] [1 x (+ y (* 2 direction))]]
+    [[0 x (+ y direction)]]))
 
-(defn fetch-selected-piece-moves [piece]
+(defn fetch-selected-piece-moves [[pos piece]]
   (case (:type piece)
-    :king (all-around-projection (:start-pos piece) 8)
-    :queen (directional-projection (:start-pos piece) 8)
-    :rook (line-projection (:start-pos piece) 8)
-    :knight (star (:start-pos piece) 8)
-    :pawn (pawn-projection (:start-pos piece) (if (= :white (:colour piece)) 1 -1) 8)
-    :bishop (diagonal-projection (:start-pos piece) 8)
+    :king (all-around-projection (:pos piece) 8)
+    :queen (directional-projection (:pos piece) 8)
+    :rook (line-projection (:pos piece) 8)
+    :knight (star (:pos piece) 8)
+    :pawn (pawn-projection (:pos piece) (if (= :white (:colour piece)) 1 -1) 8)
+    :bishop (diagonal-projection (:pos piece) 8)
     (prn (str "type = " (:type piece)))))
 
+(defn valid-move? [dest-pos game-state]
+  (let [piece (first (filter (fn [[k v]] (:selected v)) game-state))
+        moves (fetch-selected-piece-moves piece)]
+    ;; if selected and destintion pos are the same no need to move
+    (when (not= dest-pos (:pos piece))
+      (some (fn [p] (= p dest-pos)) moves))))
+
+;; (line-horizontal [8 1] 8)
+;; (line-vertical [8 1] 8)
+
+;; ;(line-projection [8 1] 8)
+;; (directional-projection [1 1] 8)
+;; (directional-projection [8 1] 8)
+;; (star [8 1] 8)
+;; (directional-projection [5 1] 8)
+
 ;; (deftest line-projection-test
 ;;   (testing "Horizontal direction"
 ;;     (is (= (line-horizontal [2 3] 8)

bases/do-blog/src/com/oly/static_sites/do_blog/pages/chess/render.cljs

@@ -16,13 +16,13 @@
         selected-piece-moveable (fetch-selected-piece-moves (first (filter :selected pieces)))
         moveable-square (first (filter #(= pos %) selected-piece-moveable))]
 
-    (-> {:text (cond
-                 (:selected piece) (:character piece) ;"S "
-                 piece (:character piece)
-                 moveable-square "O "
-                 :else (if (= (calculate-black-white pos) :black)
-                         white-square
-                         black-square))}
+    (-> piece (assoc :text (cond
+                        (:selected piece) (:character piece) ;"S "
+                        piece (:character piece)
+                        moveable-square "O "
+                        :else (if (= (calculate-black-white pos) :black)
+                                white-square
+                                black-square)))
         (assoc :colour (if (= square :black)
                          white-square
                          black-square)

bases/do-blog/src/com/oly/static_sites/do_blog/pages/chess/state.cljs

@@ -27,101 +27,133 @@
 (def board {:tile-size [8 8]})
 (def start-state
   [{:character white-rook
+    :colour :white
     :type :rook
     :start-pos [1 1]}
    {:character white-knight
+    :colour :white
     :type :knight
     :start-pos [2 1]}
    {:character white-bishop
+    :colour :white
     :type :bishop
     :start-pos [3 1]}
    {:character white-king
-    :type :queen
+    :colour :white
+    :type :king
     :start-pos [4 1]}
    {:character white-queen
-    :type :king
+    :colour :white
+    :type :queen
     :start-pos [5 1]}
    {:character white-bishop
+    :colour :white
     :type :bishop
     :start-pos [6 1]}
    {:character white-knight
+    :colour :white
     :type :knight
     :start-pos [7 1]}
    {:character white-rook
+    :colour :white
     :type :rook
     :start-pos [8 1]}
 
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [1 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [2 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [3 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [4 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [5 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [6 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [7 2]}
    {:type :pawn
-    :character white-pawn
+    :colour :white
+    :character black-pawn
     :start-pos [8 2]}
 
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [1 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [2 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [3 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [4 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [5 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [6 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [7 7]}
    {:type :pawn
+    :colour :black
     :character black-pawn
     :start-pos [8 7]}
 
    {:character black-rook
+    :colour :black
     :type :rook
     :start-pos [1 8]}
    {:character black-knight
+    :colour :black
     :type :knight
     :start-pos [2 8]}
    {:character black-bishop
+    :colour :black
     :type :bishop
     :start-pos [3 8]}
-   {:character black-king
+   {:character black-queen
+    :colour :black
     :type :queen
     :start-pos [4 8]}
-   {:character black-queen
+   {:character black-king 
+    :colour :black
     :type :king
     :start-pos [5 8]}
    {:character black-bishop
+    :colour :black
     :type :bishop
     :start-pos [6 8]}
    {:character black-knight
+    :colour :black
     :type :knight
     :start-pos [7 8]}
    {:character black-rook
+    :colour :black
     :type :rook
     :start-pos [8 8]}])

bases/do-blog/src/com/oly/static_sites/do_blog/pages/chess_board.cljs

@@ -0,0 +1,167 @@
+(ns com.oly.static-sites.do-blog.pages.chess-board
+  (:require
+   [com.oly.static-sites.do-blog.pages.chess.movement
+    :refer [fetch-selected-piece-moves valid-move?]]
+   [com.oly.static-sites.do-blog.pages.chess.render
+    :refer [calculate-black-white]]
+   [com.oly.static-sites.do-blog.pages.chess.state
+    :refer [black-square start-state white-square]]
+   [com.oly.static-sites.ui-hiccup.interface :refer [board]]
+   [reagent.core :as r]))
+
+(defonce game-state (r/atom []))
+(defonce game-state-viking (r/atom []))
+
+(defn board-test [size]
+  (loop [x-pos 1
+         y-pos 1
+         result []]
+    (if (and (= x-pos size) (= y-pos size))
+      result
+      (if (= size x-pos)
+        (recur 1
+               (inc y-pos)
+               (conj result [x-pos y-pos]))
+        (recur (inc x-pos)
+               y-pos
+               (conj result [x-pos y-pos]))))))
+
+(defn get-square [pos]
+  (get @game-state pos {})
+  )
+
+(defn reset-square [pos value]
+  (prn (str "update " pos))
+  (swap! game-state assoc pos value))
+
+(defn update-square [pos value]
+  (prn (str "update " pos))
+  (prn value)
+  (swap! game-state assoc pos
+         (merge (get @game-state pos {})
+                value)))
+
+;; (update-square [1 1] {:class "fl bg-green"})
+;; (update-square [2 2] {:class "fl bg-green"})
+
+(defn square-defaults [pos]
+  {:class (if (= (calculate-black-white pos) :black)
+            "bg-black-20 black-80"
+            "bg-black-80 white-80")})
+
+(defn create-board [size]
+  (->> (board-test size)
+       (mapv #(let [square-colour (calculate-black-white %)]
+                (vector % (square-defaults %)
+                        #_{;:colour (calculate-black-white %)
+                           :class (if (= square-colour :black)
+                                    "bg-white-80 black-80"
+                                    "bg-black-60 white-80")})))
+       (into {})))
+
+(defn collisions [ positions]
+  (filterv (fn [[distance x y]]
+             (let [piece (get-square [x y]) ]
+                                 (prn (str "collision = " [x y] " - " (:type piece) " - " (:colour piece)))
+                                 (and (nil? (:type piece))
+                                      (nil? (:colour piece)))
+                                  )) positions))
+
+(defn highlight-moves [pos]
+  (->> (fetch-selected-piece-moves (first (filter (fn [[k v]] (:selected v)) @game-state)))
+       collisions
+       (mapv (fn [[distance x y]]
+               (update-square
+                [x y]
+                {:highlight (str " bg-green bg-green-" (+ 1 distance) "00 ")
+                 :pos [x y]})))))
+
+(defn clear-keys [key]
+  (reset! game-state
+          (reduce-kv (fn [m pos piece]
+                       (assoc m pos (dissoc piece key))) {} @game-state)))
+
+(defn get-selected-square []
+  (last (filter (fn [[_ square]] (true? (:selected square))) @game-state)))
+
+(defn move-piece [src-pos piece dest-pos]
+  (prn (str "move piece from " src-pos " to " dest-pos))
+  (prn piece)
+  (when (valid-move? dest-pos @game-state)
+    (update-square dest-pos piece)
+    (reset-square src-pos (square-defaults src-pos))))
+
+(defn click-square [evt p]
+  (let [[selected-pos selected-piece] (get-selected-square)]
+    (clear-keys :highlight)
+
+    (if selected-pos
+      (do (prn "previously selected piece")
+          (move-piece (:pos selected-piece) selected-piece (:pos p))
+          (clear-keys :selected))
+      (do
+        (prn "no previously selected piece")
+        (clear-keys :selected)
+        (update-square (:pos p) (assoc p :selected true))
+        (highlight-moves (:pos p)))))
+
+  (clear-keys :selected)
+  (clear-keys :highlight)
+  (update-square (:pos p) (assoc p :selected true))
+  (highlight-moves (:pos p))
+  (prn (get @game-state (:pos p))))
+
+(defn enhance-board [board]
+  (reduce-kv
+   (fn [m key square]
+     (assoc m key (assoc square :on-click click-square :pos key)))
+   {}
+   board))
+
+(defn place-pieces-on-board [board pieces]
+  (reduce (fn [m piece]
+            (let [square-colour (calculate-black-white (:start-pos piece))]
+              (assoc m (:start-pos piece)
+                     (-> piece
+                         (assoc :pos (:start-pos piece)
+                                :text (:character piece)
+                                :selected false
+                                ;; :colour (if (= square-colour :black)
+                                ;;           white-square
+                                ;;           black-square)
+                                :on-click click-square
+                                :class (if (= square-colour :black)
+                                         (str "bg-black-20 " (if (= :white (:colour piece))
+                                                               " black "
+                                                               " white "))
+
+                                         (str "bg-black-80 " (if (= :white (:colour piece)) " black" " white "))))))))
+
+          board
+          pieces))
+
+(reset! game-state-viking
+        (-> (create-board 11)))
+
+(reset! game-state
+        (-> (create-board 8)
+            (enhance-board)
+            (place-pieces-on-board start-state)))
+
+(defn chess-page [{:keys [path-params] :as route}]
+  (fn [{:keys [path-params] :as route}]
+    [:div
+     (let [[pos piece] (get-selected-square)]
+       [:div
+        [:div (str "pos = " pos)]
+        [:div (str (:type piece))]
+        [:div (str piece)]
+        [:div (str "move = " (fetch-selected-piece-moves [pos piece]))]])
+     [:div (str (fetch-selected-piece-moves  (first (filter (fn [[k v]] (:selected v)) @game-state))))]
+     [:div (board 8 @game-state)]
+     [:div "Viking chess board"]
+     [:div (board 11 @game-state-viking)]]))
+
+(comment
+  (get-selected-square)
+  @game-state)

components/ui-hiccup/src/com/oly/static_sites/ui_hiccup/chess.cljc

@@ -1,24 +1,29 @@
 (ns com.oly.static-sites.ui-hiccup.chess)
 
-(defn square [{:keys [colour text class]}]
-  [:div.flex.items-center.justify-around.w3.h3.tc {:class class}
-   [:p.v-mid.ma0.pa0 text]])
+(defn square [{:keys [colour highlight selected on-click text class] :as sq}]
+  (prn on-click)
+  [:div.flex.items-center.justify-around.w3.h3.tc
+   {:class (str "fl " class highlight (when selected " bg-red ")
+
+                (if (= :white colour) " black-80" " white-80"))
+    :on-click #(on-click % sq)}
+   [:p.v-mid.ma0.pa0.f2 text]])
 
 (defn board [size items]
-  (loop [pos 1
-         squares items
+  (loop [x-pos 1
+         y-pos 1
          row [:div.h3]
          result [:div]]
-    (if (seq squares)
-      (if (= size pos)
+    (if (and (= size (- y-pos 1)) (= size x-pos))
+      result
+      (if (= size x-pos)
         (recur 1
-               (rest squares)
+               (inc y-pos)
                [:div.h3]
-               (conj result (conj row (square (first squares)))))
-        (recur (inc pos)
-               (rest squares)
-               (conj row (square (first squares)))
-               result))
-      result)))
+               (conj result (conj row (square (get items [x-pos y-pos])))))
+        (recur (inc x-pos)
+               y-pos
+               (conj row (square (get items [x-pos y-pos])))
+               result)))))