From add682d6aaa50b2c1561731cdb1696bf7665cba3 Mon Sep 17 00:00:00 2001
From: nil <niljo@airmail.cc>
Date: Sat, 14 Dec 2024 21:38:07 +0100
Subject: liberty fix and tidying code

---
 src/engine/liberty.js | 63 ++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 45 insertions(+), 18 deletions(-)

(limited to 'src/engine/liberty.js')

diff --git a/src/engine/liberty.js b/src/engine/liberty.js
index d5d4448..6d1bbda 100644
--- a/src/engine/liberty.js
+++ b/src/engine/liberty.js
@@ -24,46 +24,73 @@ function checkLiberties({
     checkedStones = [],
     checkedLiberties = [],
 }) {
-    if (
-        Array.from(checkedStones)
-            .some(p => Vector2.equals(p, position))
-    ) {
+    if (isInArray(position, checkedStones)) {
         return false
     }
+    
+    if (checkedLiberties.length > 0) {
+        console.log(team, checkedLiberties)
+    }
 
     checkedStones.push(position)
 
-    let surroundingSquares = Array.from(SURROUNDING)
+    let surroundingSquares = getSurroundingSquares(position)
+
+    findEmptySquares(
+        surroundingSquares,
+        checkedLiberties
+    )
+
+    findFriendlyStones(
+        surroundingSquares,
+        {team, checkedStones, checkedLiberties}
+    )
+
+    if (checkedLiberties.length == 1 && checkedStones.length < 2) {
+        return true
+    }
+
+    if (checkedLiberties.length > 1) {
+        return true
+    }
+
+    return false
+}
+
+function isInArray(position, array) {
+    return Array.from(array)
+        .some(p => Vector2.equals(p, position))
+}
+
+function getSurroundingSquares(position) {
+    return Array.from(SURROUNDING)
         .map(v => Vector2.sum(v, position))
         .filter(z => 0 <= z.x && z.x < board.size &&
             0 <= z.y && z.y < board.size
         )
+}
 
+function findEmptySquares(surroundingSquares, checkedLiberties) {
     surroundingSquares
         .filter(z => board.stones[z.y][z.x] == undefined)
         .forEach(z => {
-            if (!Array.from(checkedStones)
-                .some(p => Vector2.equals(p, z))
-            ) {
+            if (!isInArray(z, checkedLiberties)) {
                 checkedLiberties.push(z)
             }
         })
+}
 
+function findFriendlyStones(surroundingSquares, data) {
     surroundingSquares
         .filter(z => board.stones[z.y][z.x] != undefined)
-        .filter(z => board.stones[z.y][z.x].team == team)
+        .filter(z => board.stones[z.y][z.x].team == data.team)
         .forEach(z => {
             checkLiberties({
                 position: z,
-                team: team,
-                checkedStones: checkedStones,
-                checkedLiberties: checkedLiberties,
+                team: data.team,
+                checkedStones: data.checkedStones,
+                checkedLiberties: data.checkedLiberties,
             })
         })
-
-    if (checkedLiberties.length > 0) {
-        return true
-    }
-
-    return false
 }
+
-- 
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