basic setup, /ping added

relay/commands/ping.go

@@ -0,0 +1,47 @@
+package commands
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/disgoorg/disgo/discord"
+	"github.com/disgoorg/disgo/handler"
+)
+
+func PingHandler(e *handler.CommandEvent) error {
+
+	now := time.Now()
+	latency := now.Sub(e.CreatedAt())
+	msLatency := latency.Milliseconds()
+	if msLatency < 0 {
+		msLatency = -msLatency
+	}
+
+	// Gateway latency
+	var gwMs int64
+	if gw := e.Client().Gateway(); gw != nil {
+		gwMs = gw.Latency().Milliseconds()
+	} else {
+		gwMs = 0
+	}
+
+	lat := float64(msLatency)
+	if lat > 5000 {
+		lat = 5000
+	}
+	red := int((lat / 5000) * 255)
+	green := 255 - red
+	color := (red << 16) | (green << 8)
+
+	embed := discord.NewEmbedBuilder().
+		SetTitle("🏓 Pong!").
+		AddField("Interaction latency", fmt.Sprintf("%d ms", msLatency), true).
+		AddField("Gateway latency", fmt.Sprintf("%d ms", gwMs), true).
+		SetColor(color).
+		Build()
+
+	return e.CreateMessage(discord.NewMessageCreateBuilder().
+		SetEmbeds(embed).
+		Build(),
+	)
+}