From 63603ce3e510d2c8f8025f39b49c61caf8769276 Mon Sep 17 00:00:00 2001
From: eug-vs <eugene@eug-vs.xyz>
Date: Fri, 27 Jan 2023 22:17:33 +0300
Subject: refactor: separate hash_move function

---
 src/board/engine.rs | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/board/engine.rs b/src/board/engine.rs
index feb3368..e11d96e 100644
--- a/src/board/engine.rs
+++ b/src/board/engine.rs
@@ -187,6 +187,18 @@ impl Board {
         0.0
     }
 
+    pub fn hash_move(&self) -> Option<Move> {
+        match self.transposition_table[(self.hash % TTABLE_SIZE) as usize] {
+            Some(item) => {
+                if item.hash == self.hash {
+                    return Some(item.best_move)
+                }
+                None
+            }
+            None => None
+        }
+    }
+
     pub fn order_moves(&self, moves: Vec<Move>) -> Vec<Move> {
         let mut moves_with_eval: Vec<(Move, f32)> = moves
             .iter()
@@ -216,12 +228,8 @@ impl Board {
         let mut moves = self.generate_pseudolegal_moves(color);
         moves = self.order_moves(moves);
 
-        match self.transposition_table[(self.hash % TTABLE_SIZE) as usize] {
-            Some(item) => {
-                if item.hash == self.hash {
-                    moves.insert(0, item.best_move);
-                }
-            }
+        match self.hash_move() {
+            Some(mov) => moves.insert(0, mov),
             None => {},
         }
 
@@ -292,12 +300,8 @@ impl Board {
         let mut moves = self.generate_pseudolegal_moves(color);
         moves = self.order_moves(moves);
 
-        match self.transposition_table[(self.hash % TTABLE_SIZE) as usize] {
-            Some(item) => {
-                if item.hash == self.hash {
-                    moves.insert(0, item.best_move);
-                }
-            }
+        match self.hash_move() {
+            Some(mov) => moves.insert(0, mov),
             None => {},
         }
 
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