From 73d04c6bb63274451ed16bfe19df3d40c319f7e9 Mon Sep 17 00:00:00 2001
From: Robby Zambito <contact@robbyzambito.me>
Date: Sat, 22 Jan 2022 13:58:36 -0500
Subject: Added diagonal moves

---
 src/move.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 84 insertions(+), 12 deletions(-)

diff --git a/src/move.c b/src/move.c
index 2bdba41..b6d9ff5 100644
--- a/src/move.c
+++ b/src/move.c
@@ -206,18 +206,90 @@ int apply_move(enum player_color **board, enum player_color current_player,
 
       done_flipping_right = true;
     }
-    /*if (!done_flipping_up_left &&) {*/
-    /*done_flipping_up_left = true;*/
-    /*}*/
-    /*if (!done_flipping_up_right &&) {*/
-    /*done_flipping_up_right = true;*/
-    /*}*/
-    /*if (!done_flipping_down_left &&) {*/
-    /*done_flipping_down_left = true;*/
-    /*}*/
-    /*if (!done_flipping_down_right &&) {*/
-    /*done_flipping_down_right = true;*/
-    /*}*/
+    if (!done_flipping_up_left && (move.row - i >= 0) && (move.col - i >= 0) &&
+        board[move.row - i][move.col - i] == current_player) {
+
+      if (i > 1) {
+        bool flippable = true;
+        for (int j = 1; flippable && j < i; j++) {
+          if (board[move.row - j][move.col - j] == EMPTY) {
+            flippable = false;
+          }
+        }
+
+        if (flippable) {
+          for (int j = 0; j < i; j++) {
+            board[move.row - j][move.col - j] = current_player;
+            num_flipped_up_left++;
+          }
+        }
+      }
+
+      done_flipping_up_left = true;
+    }
+    if (!done_flipping_up_right && (move.row - i >= 0) && (move.col + i < 8) &&
+        board[move.row - i][move.col + i] == current_player) {
+
+      if (i > 1) {
+        bool flippable = true;
+        for (int j = 1; flippable && j < i; j++) {
+          if (board[move.row - j][move.col + j] == EMPTY) {
+            flippable = false;
+          }
+        }
+
+        if (flippable) {
+          for (int j = 0; j < i; j++) {
+            board[move.row - j][move.col + j] = current_player;
+            num_flipped_up_right++;
+          }
+        }
+      }
+
+      done_flipping_up_right = true;
+    }
+    if (!done_flipping_down_left && (move.row + i < 8) && (move.col - i >= 0) &&
+        board[move.row + i][move.col - i] == current_player) {
+
+      if (i > 1) {
+        bool flippable = true;
+        for (int j = 1; flippable && j < i; j++) {
+          if (board[move.row + j][move.col - j] == EMPTY) {
+            flippable = false;
+          }
+        }
+
+        if (flippable) {
+          for (int j = 0; j < i; j++) {
+            board[move.row + j][move.col - j] = current_player;
+            num_flipped_down_left++;
+          }
+        }
+      }
+
+      done_flipping_down_left = true;
+    }
+    if (!done_flipping_down_right && (move.row + i < 8) && (move.col + i < 8) &&
+        board[move.row + i][move.col + i] == current_player) {
+
+      if (i > 1) {
+        bool flippable = true;
+        for (int j = 1; flippable && j < i; j++) {
+          if (board[move.row + j][move.col + j] == EMPTY) {
+            flippable = false;
+          }
+        }
+
+        if (flippable) {
+          for (int j = 0; j < i; j++) {
+            board[move.row + j][move.col + j] = current_player;
+            num_flipped_down_right++;
+          }
+        }
+      }
+
+      done_flipping_down_right = true;
+    }
   }
 
   return num_flipped_up + num_flipped_down + num_flipped_left +
-- 
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