Move a whole bunch of stuff to the new chessfriend_board package

board/src/display.rs

@@ -0,0 +1,68 @@
+// Eryn Wells <eryn@erynwells.me>
+
+use crate::Board;
+use chessfriend_core::{File, Rank, Square};
+use std::fmt;
+
+pub struct DiagramFormatter<'a>(&'a Board);
+
+impl<'a> DiagramFormatter<'a> {
+    pub fn new(board: &'a Board) -> Self {
+        Self(board)
+    }
+}
+
+impl<'a> fmt::Display for DiagramFormatter<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "  ╔═════════════════╗")?;
+
+        for rank in Rank::ALL.into_iter().rev() {
+            write!(f, "{rank} ║ ")?;
+
+            for file in File::ALL {
+                let square = Square::from_file_rank(file, rank);
+                match self.0.piece_on_square(square) {
+                    Some(placed_piece) => write!(f, "{} ", placed_piece.piece())?,
+                    None => write!(f, "· ")?,
+                }
+            }
+
+            writeln!(f, "║")?;
+        }
+
+        writeln!(f, "  ╚═════════════════╝")?;
+        writeln!(f, "    a b c d e f g h")?;
+
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{test_board, Board};
+
+    #[test]
+    #[ignore]
+    fn empty() {
+        let pos = test_board!(empty);
+        let diagram = DiagramFormatter(&pos);
+        println!("{diagram}");
+    }
+
+    #[test]
+    #[ignore]
+    fn one_king() {
+        let pos = test_board![Black King on H3];
+        let diagram = DiagramFormatter(&pos);
+        println!("{diagram}");
+    }
+
+    #[test]
+    #[ignore]
+    fn starting() {
+        let pos = test_board!(starting);
+        let diagram = DiagramFormatter(&pos);
+        println!("{diagram}");
+    }
+}