feat: highlight player-controlled areas

1 files changed, 35 insertions, 0 deletions

diff --git a/src/board.c b/src/board.c
index 0e66f16..95b8738 100644
--- a/src/board.c
+++ b/src/board.c
@@ -111,3 +111,38 @@ int evaluate_structure(int index, BoardUnit* board) {
 
   return value;
 }
+
+void refresh_meeple_map(BoardUnit* board, int* meeple_map) {
+  for (int i = 0; i < MAX_STRUCTURES * PLAYERS; i++) meeple_map[i] = 0;
+
+  for (int i = 0; i < BOARD_UNITS; i++) {
+    if (board[i].meeple) {
+      meeple_map[board[i].structure_group * PLAYERS + (board[i].meeple - 1)]++;
+    }
+  }
+}
+
+int is_allowed_meeple(int meeple, int index, BoardUnit* board, int* meeple_map) {
+  if (board[index].meeple
+    || board[index].feature == 'F'
+    || board[index].feature == ANY
+    || board[index].feature == SEPARATOR
+  ) return 0;
+
+  int dominator = get_structure_dominator(board[index].structure_group, meeple_map);
+  return dominator == meeple || dominator == 0;
+}
+
+int get_structure_dominator(int structure_group, int* meeple_map) {
+  int dominator = 0;
+  int dominator_meeples = 0;
+
+  for (int player = 0; player < PLAYERS; player++) {
+    int meeples = meeple_map[structure_group * PLAYERS + player];
+    if (meeples > dominator_meeples) {
+      dominator_meeples = meeples;
+      dominator = player + 1;
+    }
+  }
+  return dominator;
+}