Include algebraic notation

chess/board.go

@@ -13,6 +13,7 @@ import (
 type Board struct {
 	tiles [8][8]*Piece
 	turn  Color
+	moves []string
 }
 
 func NewBoard() *Board {
@@ -131,6 +132,18 @@ func (b *Board) SetPiece(name PieceName, color Color, position string) error {
 	return nil
 }
 
+func (b *Board) AlgebraicNotation() string {
+	var text string
+	for i, m := range b.moves {
+		if i%2 == 0 {
+			text += fmt.Sprintf("%d. %s", i/2+1, m)
+		} else {
+			text += fmt.Sprintf(" %s ", m)
+		}
+	}
+	return text
+}
+
 func (b *Board) Parse(pgn string) error {
 	var (
 		moves = strings.Split(pgn, " ")
@@ -205,7 +218,7 @@ func (b *Board) Move(position string) error {
 			err = fmt.Errorf("invalid move: %s", position)
 		}
 	} else {
-		err = fmt.Errorf("invalid move: %s", position)
+		return fmt.Errorf("invalid move: %s", position)
 	}
 
 	if err != nil {
@@ -218,6 +231,8 @@ func (b *Board) Move(position string) error {
 		b.turn = Light
 	}
 
+	b.moves = append(b.moves, position)
+
 	return nil
 }
 

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"strings"
 	"time"
@@ -70,9 +71,9 @@ func tickGameStart(c *sn.Client) {
 			continue
 		}
 
+		text := fmt.Sprintf("`%s`\n\n%s", b.AlgebraicNotation(), imgUrl)
 		var cId int
-		parentId := n.Item.Id
-		if cId, err = c.CreateComment(parentId, imgUrl); err != nil {
+		if cId, err = c.CreateComment(n.Item.Id, text); err != nil {
 			log.Printf("error creating reply: %v\n", err)
 			continue
 		}
@@ -158,8 +159,9 @@ func tickGameProgress(c *sn.Client) {
 			continue
 		}
 
+		text := fmt.Sprintf("`%s`\n\n%s", b.AlgebraicNotation(), imgUrl)
 		var cId int
-		if cId, err = c.CreateComment(n.Item.Id, imgUrl); err != nil {
+		if cId, err = c.CreateComment(n.Item.Id, text); err != nil {
 			log.Printf("error creating reply: %v\n", err)
 			continue
 		}