grid2: add SlackAttachment on grid profit

pkg/strategy/grid2/profit.go

@@ -2,9 +2,13 @@ package grid2
 
 import (
 	"fmt"
+	"strconv"
 	"time"
 
+	"github.com/slack-go/slack"
+
 	"github.com/c9s/bbgo/pkg/fixedpoint"
+	"github.com/c9s/bbgo/pkg/style"
 	"github.com/c9s/bbgo/pkg/types"
 )
 
@@ -22,3 +26,23 @@ func (p *GridProfit) String() string {
 func (p *GridProfit) PlainText() string {
 	return fmt.Sprintf("Grid profit: %f %s @ %s orderID %d", p.Profit.Float64(), p.Currency, p.Time.String(), p.Order.OrderID)
 }
+
+func (p *GridProfit) SlackAttachment() slack.Attachment {
+	title := fmt.Sprintf("Grid Profit %s %s", style.PnLSignString(p.Profit), p.Currency)
+	return slack.Attachment{
+		Title: title,
+		Color: "warning",
+		Fields: []slack.AttachmentField{
+			{
+				Title: "OrderID",
+				Value: strconv.FormatUint(p.Order.OrderID, 10),
+				Short: true,
+			},
+			{
+				Title: "Time",
+				Value: p.Time.String(),
+				Short: true,
+			},
+		},
+	}
+}