feat(message-gateway): add Telegram private-chat telebot adapter

pkg/message_gateway/channel/telegram/adapter_test.go

@@ -0,0 +1,56 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package telegram
+
+import (
+	"context"
+	"testing"
+
+	"github.com/Rain-kl/Wavelet/pkg/message_gateway"
+	tele "gopkg.in/telebot.v4"
+)
+
+func TestHandleUpdate_DropsGroups(t *testing.T) {
+	var got int
+	a := &Adapter{onInbound: func(ctx context.Context, msg message_gateway.InboundMessage) error {
+		got++
+		return nil
+	}}
+	a.handleTeleMessage(&tele.Message{
+		ID:     1,
+		Text:   "hi",
+		Chat:   &tele.Chat{ID: -100, Type: tele.ChatGroup},
+		Sender: &tele.User{ID: 1},
+	})
+	if got != 0 {
+		t.Fatalf("group must be ignored")
+	}
+}
+
+func TestHandleUpdate_PrivateText(t *testing.T) {
+	var got message_gateway.InboundMessage
+	a := &Adapter{
+		cfg: message_gateway.ChannelConfig{ID: 7, Type: "telegram"},
+		onInbound: func(ctx context.Context, msg message_gateway.InboundMessage) error {
+			got = msg
+			return nil
+		},
+	}
+	a.handleTeleMessage(&tele.Message{
+		ID:     9,
+		Text:   "hi",
+		Chat:   &tele.Chat{ID: 42, Type: tele.ChatPrivate},
+		Sender: &tele.User{ID: 42},
+	})
+	if got.Text != "hi" || got.PlatformUserID != "42" || got.ChannelID != 7 {
+		t.Fatalf("%+v", got)
+	}
+}
+
+func TestNew_RequiresToken(t *testing.T) {
+	_, err := New(message_gateway.ChannelConfig{}, nil)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+}