fen

fen/fen.go

@@ -0,0 +1,46 @@
+package fen
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Tokens returns the tokens of a FEN string
+func Tokens(fen string) []string {
+	return strings.Split(fen, " ")
+}
+
+// Ranks returns a slice of ranks from the FEN string
+func Ranks(fen string) []string {
+	return strings.Split(Tokens(fen)[0], "/")
+}
+
+// Grid returns a 8x8 grid of the board represented by the FEN string
+func Grid(fen string) [8][8]string {
+	var grid [8][8]string
+	for r, rank := range Ranks(fen) {
+		var row [8]string
+		c := 0
+		for _, col := range rank {
+			skip := 1
+			if isNumeric(col) {
+				skip = runeToInt(col)
+			} else {
+				row[c] = fmt.Sprintf("%c", col)
+			}
+			c += skip
+		}
+		grid[r] = row
+	}
+	return grid
+}
+
+// isNumeric returns true if the current rune is a number
+func isNumeric(r rune) bool {
+	return r >= '0' && r <= '9'
+}
+
+// runeToInt converts a rune to an int
+func runeToInt(r rune) int {
+	return int(r - '0')
+}

game/game.go

@@ -6,6 +6,7 @@ import (
 
 	tea "github.com/charmbracelet/bubbletea"
 	dt "github.com/dylhunn/dragontoothmg"
+
 	"github.com/maaslalani/gambit/board"
 	"github.com/maaslalani/gambit/border"
 	"github.com/maaslalani/gambit/fen"
@@ -65,8 +66,8 @@ func (m model) View() string {
 			}
 			s.WriteString(display + border.Vertical)
 		}
-
 		s.WriteString("\n")
+
 		if r != board.LastRow {
 			s.WriteString(border.Middle())
 		} else {