refactor(commands): centralize built-in command definitions

pkg/channels/telegram/telegram_commands.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/mymmrac/telego"
 
+	"github.com/sipeed/picoclaw/pkg/commands"
 	"github.com/sipeed/picoclaw/pkg/config"
 )
 
@@ -38,11 +39,8 @@ func commandArgs(text string) string {
 }
 
 func (c *cmd) Help(ctx context.Context, message telego.Message) error {
-	msg := `/start - Start the bot
-/help - Show this help message
-/show [model|channel] - Show current configuration
-/list [models|channels] - List available options
-	`
+	defs := commands.NewRegistry(commands.BuiltinDefinitions(c.config)).ForChannel("telegram")
+	msg := formatHelpMessage(defs)
 	_, err := c.bot.SendMessage(ctx, &telego.SendMessageParams{
 		ChatID: telego.ChatID{ID: message.Chat.ID},
 		Text:   msg,
@@ -53,6 +51,26 @@ func (c *cmd) Help(ctx context.Context, message telego.Message) error {
 	return err
 }
 
+func formatHelpMessage(defs []commands.Definition) string {
+	if len(defs) == 0 {
+		return "No commands available."
+	}
+
+	lines := make([]string, 0, len(defs))
+	for _, def := range defs {
+		usage := def.Usage
+		if usage == "" {
+			usage = "/" + def.Name
+		}
+		desc := def.Description
+		if desc == "" {
+			desc = "No description"
+		}
+		lines = append(lines, fmt.Sprintf("%s - %s", usage, desc))
+	}
+	return strings.Join(lines, "\n")
+}
+
 func (c *cmd) Start(ctx context.Context, message telego.Message) error {
 	_, err := c.bot.SendMessage(ctx, &telego.SendMessageParams{
 		ChatID: telego.ChatID{ID: message.Chat.ID},

pkg/commands/builtin.go

@@ -0,0 +1,32 @@
+package commands
+
+import "github.com/sipeed/picoclaw/pkg/config"
+
+func BuiltinDefinitions(_ *config.Config) []Definition {
+	return []Definition{
+		{
+			Name:        "start",
+			Description: "Start the bot",
+			Usage:       "/start",
+			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+		},
+		{
+			Name:        "help",
+			Description: "Show this help message",
+			Usage:       "/help",
+			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+		},
+		{
+			Name:        "show",
+			Description: "Show current configuration",
+			Usage:       "/show [model|channel]",
+			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+		},
+		{
+			Name:        "list",
+			Description: "List available options",
+			Usage:       "/list [models|channels]",
+			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+		},
+	}
+}

pkg/commands/builtin_test.go

@@ -0,0 +1,16 @@
+package commands
+
+import "testing"
+
+func TestBuiltinDefinitions_ContainsTelegramDefaults(t *testing.T) {
+	defs := BuiltinDefinitions(nil)
+	names := map[string]bool{}
+	for _, d := range defs {
+		names[d.Name] = true
+	}
+	for _, want := range []string{"help", "start", "show", "list"} {
+		if !names[want] {
+			t.Fatalf("missing command %q", want)
+		}
+	}
+}