feat: return latency and roundtrip duration in ping command (#56)

Author: hmd-ali

src/commands/ping.ts

@@ -6,7 +6,14 @@ export const pingCommand = createCommand({
     description: 'Replies with Pong!',
   },
   execute: async (interaction) => {
-    const user = interaction.user;
-    await interaction.reply(`<@${user.id}> Pong!`);
+    const sent = await interaction.reply({ content: 'pinging...', withResponse: true });
+    const message = sent.resource?.message;
+    if (!message) {
+      await interaction.editReply('Failed to send ping message.');
+      return;
+    }
+    const roundTrip = message.createdTimestamp - interaction.createdTimestamp;
+    const apiLatency = interaction.client.ws.ping;
+    await interaction.editReply(`latency: ${apiLatency}ms | Roundtrip: ${roundTrip}ms`);
   },
 });