feat(discord bot): added in a ping host command to get the bot going :D

more commands will be added as we continue working on this bot, including service restarts, log
monitors

controller/internal/bot/commands.go

@@ -0,0 +1,64 @@
+package bot
+
+import (
+	"fmt"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+var registeredCommands = []*discordgo.ApplicationCommand{
+	{
+		Name:        "ping",
+		Description: "Ping a server to make sure it's still online.",
+		Options: []*discordgo.ApplicationCommandOption{
+			{
+				Type:        discordgo.ApplicationCommandOptionString,
+				Name:        "host",
+				Description: "The server hostname or IP to ping",
+				Required:    true,
+			},
+		},
+	},
+	// future commands can be added here
+}
+
+func registerCommands(s *discordgo.Session) {
+	existing, err := s.ApplicationCommands(s.State.User.ID, "")
+	if err != nil {
+		fmt.Println("Failed to list existing commands:", err)
+		return
+	}
+
+	for _, cmd := range registeredCommands {
+		alreadyExists := false
+		for _, e := range existing {
+			if e.Name == cmd.Name {
+				alreadyExists = true
+				break
+			}
+		}
+
+		if alreadyExists {
+			fmt.Printf("Command '%s' already exists, skipping registration.\n", cmd.Name)
+			continue
+		}
+
+		_, err := s.ApplicationCommandCreate(s.State.User.ID, "", cmd)
+		if err != nil {
+			fmt.Printf("Cannot create command '%s': %v\n", cmd.Name, err)
+		} else {
+			fmt.Printf("Registered command: %s\n", cmd.Name)
+		}
+	}
+}
+
+// Cleanup commands on shutdown
+func cleanupCommands(s *discordgo.Session) {
+	commands, err := s.ApplicationCommands(s.State.User.ID, "")
+	if err != nil {
+		return
+	}
+	for _, cmd := range commands {
+		_ = s.ApplicationCommandDelete(s.State.User.ID, "", cmd.ID)
+	}
+}