From dc9432b07b3eb98fc18f4564792b359eec23ca64 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Thu, 20 Feb 2025 16:19:42 -0500
Subject: [PATCH] initial BoardValueMap

---
 src/logic/board_value.rs | 20 ++++++++++++++++++++
 src/logic/mod.rs         |  1 +
 src/repr/board.rs        |  2 +-
 src/repr/mod.rs          |  2 +-
 4 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 src/logic/board_value.rs

diff --git a/src/logic/board_value.rs b/src/logic/board_value.rs
new file mode 100644
index 0000000..62d9ae5
--- /dev/null
+++ b/src/logic/board_value.rs
@@ -0,0 +1,20 @@
+use crate::repr::{Board, Piece, PosMap};
+
+pub struct BoardValueMap(PosMap<f32>);
+
+impl BoardValueMap {
+    pub fn board_value(&self, board: &Board, color: Piece) -> f32 {
+        let mut board_value: f32 = 0.0;
+        for (i, j) in Board::all_positions() {
+            if let Some(pos_p) = board.get(i, j) {
+                let mut value = *self.0.get(i, j);
+                if pos_p != color {
+                    // enemy has position
+                    value = -value;
+                }
+                board_value += value;
+            }
+        }
+        board_value
+    }
+}
diff --git a/src/logic/mod.rs b/src/logic/mod.rs
index 7075cba..aef055a 100644
--- a/src/logic/mod.rs
+++ b/src/logic/mod.rs
@@ -1,3 +1,4 @@
+mod board_value;
 mod future_moves;
 mod r#move;
 pub use future_moves::FutureMoves;
diff --git a/src/repr/board.rs b/src/repr/board.rs
index 32978db..85d95a2 100644
--- a/src/repr/board.rs
+++ b/src/repr/board.rs
@@ -26,7 +26,7 @@ type ChainCollection = ArrayVec<Chain, 8>;
 /// Map of all points on the board against some type T
 /// Used to index like so: example[i][j]
 /// with each coordinate
-struct PosMap<T>(ArrayVec<T, BOARD_AREA>);
+pub struct PosMap<T>(ArrayVec<T, BOARD_AREA>);
 
 impl<T> PosMap<T> {
     pub fn get(&self, row: usize, col: usize) -> &T {
diff --git a/src/repr/mod.rs b/src/repr/mod.rs
index 81299d5..110720a 100644
--- a/src/repr/mod.rs
+++ b/src/repr/mod.rs
@@ -3,5 +3,5 @@ mod board;
 mod misc;
 mod piece;
 
-pub use board::{Board, Winner};
+pub use board::{Board, PosMap, Winner};
 pub use piece::Piece;