Improve formatting setup.

Add concept of games.

engine/src/lib.rs

@@ -19,7 +19,7 @@ pub enum BoardSize {
 }
 
 impl BoardSize {
-    fn get_size(&self) -> u32 {
+    fn get_size(&self) -> usize {
         match &self {
             BoardSize::American => 8,
             BoardSize::International => 10,
@@ -60,7 +60,7 @@ impl Board {
         }
     }
 
-    fn get_index(&self, row: u32, column: u32) -> usize {
+    fn get_index(&self, row: usize, column: usize) -> usize {
         let width = self.dimensions.get_size();
         (row * (width / 2) + column) as usize
     }
@@ -74,15 +74,12 @@ impl fmt::Display for Board {
         let width = self.dimensions.get_size();
 
         // Create the top level border.
-        let mut column_border_chars = COLUMN_COORDINATE_BORDER.chars();
-        for _ in 0..width + 1 {
-            write!(formatter, "{}", column_border_chars.next().unwrap())?;
-        }
-        write!(formatter, "\n")?;
+        let (column_border_chars, _) = COLUMN_COORDINATE_BORDER.split_at(width + 1);
+        writeln!(formatter, "{}", column_border_chars)?;
 
         for row in 0..width {
 
-            write!(formatter, "{ }", (row + 1).to_string())?;
+            write!(formatter, "{}", (row + 1).to_string())?;
             if row % 2 == 0 {
                 write!(formatter, " ")?;
             }
@@ -115,6 +112,25 @@ impl fmt::Display for Board {
     }
 }
 
+pub enum GameState {
+    LightPlayerTurn,
+    DarkPlayerTurn,
+    LightPlayerWin,
+    DarkPlayerWin,
+    DrawGame,
+}
+
+pub struct Player {
+    name: String,
+}
+
+pub struct Game {
+    board: Board,
+    light_player: Player,
+    dark_player: Player,
+    state: GameState,
+}
+
 
 #[cfg(test)]
 mod tests {