fix(server/reward): TG bot 回复区分已领取/未加入两态 + 按 Telegram language_code 中英双语

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01P9G7E3wmAYL9KeYCVZVsqu

server/internal/reward/handler.go

@@ -2,6 +2,7 @@ package reward
 
 import (
 	"encoding/json"
+	"fmt"
 	"net/http"
 	"strconv"
 	"strings"
@@ -10,6 +11,35 @@ import (
 	"github.com/wangjia/pangolin/server/internal/auth"
 )
 
+// tgMsgs 是 TG bot 回执文案表(中/英双语)。key 与 ClaimResult / 失效态对应。
+type tgMsgSet struct {
+	expired, granted, already, notMember, errored string
+}
+
+var tgMsgsZH = tgMsgSet{
+	expired:   "链接已失效,请回 App 重新点「验证领取」。",
+	granted:   "已到账 +3 天 Pro,感谢加入!",
+	already:   "你已领取过本奖励(+3 天),无需重复领取。",
+	notMember: "未检测到你已加入频道 %s,请先加入频道,再回 App 点「验证领取」。",
+	errored:   "验证出错,请稍后重试。",
+}
+
+var tgMsgsEN = tgMsgSet{
+	expired:   "This link has expired. Please tap \u201cVerify & claim\u201d in the app again.",
+	granted:   "+3 days of Pro credited — thanks for joining!",
+	already:   "You've already claimed this reward (+3 days) — no need to claim again.",
+	notMember: "You don't seem to be a member of %s yet. Please join the channel first, then tap \u201cVerify & claim\u201d in the app.",
+	errored:   "Verification failed, please try again later.",
+}
+
+// tgMsgSetFor 按 Telegram language_code 选中/英文案表:zh* → 中文,其余(含空)→ 英文。
+func tgMsgSetFor(languageCode string) tgMsgSet {
+	if strings.HasPrefix(languageCode, "zh") {
+		return tgMsgsZH
+	}
+	return tgMsgsEN
+}
+
 const inviteLinkBase = "https://pangolin.yanmeiai.com/i/"
 
 type Handler struct {
@@ -88,7 +118,8 @@ func (h *Handler) TelegramWebhook(w http.ResponseWriter, r *http.Request) {
 		Message struct {
 			Text string `json:"text"`
 			From struct {
-				ID int64 `json:"id"`
+				ID           int64  `json:"id"`
+				LanguageCode string `json:"language_code"`
 			} `json:"from"`
 		} `json:"message"`
 	}
@@ -98,21 +129,24 @@ func (h *Handler) TelegramWebhook(w http.ResponseWriter, r *http.Request) {
 	if !strings.HasPrefix(text, "/start ") || fromID == 0 {
 		return
 	}
+	msgs := tgMsgSetFor(upd.Message.From.LanguageCode)
 	token := strings.TrimSpace(strings.TrimPrefix(text, "/start "))
 	ctx := r.Context()
 	uid, ok, _ := h.svc.ConsumeTelegramToken(ctx, token)
 	if !ok {
-		h.svc.SendTelegram(ctx, fromID, "链接已失效,请回 App 重新点「验证领取」。")
+		h.svc.SendTelegram(ctx, fromID, msgs.expired)
 		return
 	}
-	granted, err := h.svc.ClaimTelegram(ctx, uid, strconv.FormatInt(fromID, 10))
+	result, err := h.svc.ClaimTelegram(ctx, uid, strconv.FormatInt(fromID, 10))
 	switch {
 	case err != nil:
-		h.svc.SendTelegram(ctx, fromID, "验证出错,请稍后重试。")
-	case granted:
-		h.svc.SendTelegram(ctx, fromID, "已到账 +3 天 Pro,感谢加入!")
-	default:
-		h.svc.SendTelegram(ctx, fromID, "请先加入频道 "+h.svc.Channel()+" 再点验证;若已加入且领取过则无需重复。")
+		h.svc.SendTelegram(ctx, fromID, msgs.errored)
+	case result == ClaimGranted:
+		h.svc.SendTelegram(ctx, fromID, msgs.granted)
+	case result == ClaimAlready:
+		h.svc.SendTelegram(ctx, fromID, msgs.already)
+	default: // ClaimNotMember
+		h.svc.SendTelegram(ctx, fromID, fmt.Sprintf(msgs.notMember, h.svc.Channel()))
 	}
 }
 

server/internal/reward/telegram.go

@@ -91,32 +91,44 @@ func (s *Service) ConsumeTelegramToken(ctx context.Context, token string) (int64
 	return id, ok, nil
 }
 
+// ClaimResult 是 ClaimTelegram 的结果三态,供上层(handler)按态回不同文案。
+type ClaimResult int
+
+const (
+	ClaimGranted   ClaimResult = iota // 发放成功
+	ClaimAlready                      // 已领取过(本账户或该 telegram_id)
+	ClaimNotMember                    // 不在频道
+)
+
 // ClaimTelegram: 真是频道成员则一次性发 TgDays 天(source='task'),唯一守卫防重复领取
 // (同 userID 或同 telegramID 只能成功一次)。
-func (s *Service) ClaimTelegram(ctx context.Context, userID int64, telegramID string) (bool, error) {
+func (s *Service) ClaimTelegram(ctx context.Context, userID int64, telegramID string) (ClaimResult, error) {
 	member, err := s.checker.IsMember(ctx, s.tg.channel, telegramID)
-	if err != nil || !member {
-		return false, err
+	if err != nil {
+		return ClaimNotMember, err
+	}
+	if !member {
+		return ClaimNotMember, nil
 	}
 	tx, err := s.db.BeginTx(ctx, &sql.TxOptions{})
 	if err != nil {
-		return false, err
+		return ClaimNotMember, err
 	}
 	defer func() { _ = tx.Rollback() }()
 	now := s.now()
 	if err := s.st.InsertClaimTx(ctx, tx, userID, "telegram_join", telegramID, s.cfg.TgDays, now); err != nil {
 		if err == ErrClaimExists {
-			return false, nil // 已领过(本账户 or 该 tgid)
+			return ClaimAlready, nil // 已领过(本账户 or 该 tgid)
 		}
-		return false, err
+		return ClaimNotMember, err
 	}
 	if _, _, err := s.g.GrantRewardTx(ctx, tx, userID, s.cfg.TgDays, "task", "task_telegram_join", "tg:"+telegramID); err != nil {
-		return false, err
+		return ClaimNotMember, err
 	}
 	if err := tx.Commit(); err != nil {
-		return false, err
+		return ClaimNotMember, err
 	}
-	return true, nil
+	return ClaimGranted, nil
 }
 
 // apiChecker 是 ChatMemberChecker 的默认生产实现:打 Telegram getChatMember。

server/internal/reward/telegram_webhook_test.go

@@ -25,17 +25,17 @@ func TestClaimTelegram_MemberGrantsOnce(t *testing.T) {
 	db := openDB(t)
 	seedU(t, db, 1, "u1")
 	s := newTgSvc(t, db, true)
-	ok, err := s.ClaimTelegram(context.Background(), 1, "tg-777")
-	if err != nil || !ok {
-		t.Fatalf("claim1: %v %v", ok, err)
+	res, err := s.ClaimTelegram(context.Background(), 1, "tg-777")
+	if err != nil || res != ClaimGranted {
+		t.Fatalf("claim1: %v %v", res, err)
 	}
 	if d := proDays(t, db, 1); d < 3 {
 		t.Fatalf("pro days=%d", d)
 	}
-	// 再领 → 不再发(唯一守卫)
-	ok2, _ := s.ClaimTelegram(context.Background(), 1, "tg-777")
-	if ok2 {
-		t.Fatalf("claimed twice")
+	// 再领 → 已领取过(唯一守卫),不再发
+	res2, err2 := s.ClaimTelegram(context.Background(), 1, "tg-777")
+	if err2 != nil || res2 != ClaimAlready {
+		t.Fatalf("claim2: %v %v", res2, err2)
 	}
 }
 
@@ -43,11 +43,32 @@ func TestClaimTelegram_NonMemberNoGrant(t *testing.T) {
 	db := openDB(t)
 	seedU(t, db, 1, "u1")
 	s := newTgSvc(t, db, false)
-	ok, _ := s.ClaimTelegram(context.Background(), 1, "tg-1")
-	if ok {
-		t.Fatalf("non-member granted")
+	res, err := s.ClaimTelegram(context.Background(), 1, "tg-1")
+	if err != nil || res != ClaimNotMember {
+		t.Fatalf("claim: %v %v", res, err)
 	}
 	if d := proDays(t, db, 1); d >= 3 {
 		t.Fatalf("granted days to non-member: %d", d)
 	}
 }
+
+func TestTgMsgSetFor_LanguageSelection(t *testing.T) {
+	cases := []struct {
+		lang string
+		zh   bool
+	}{
+		{"zh-hans", true},
+		{"zh", true},
+		{"zh-CN", true},
+		{"en", false},
+		{"de", false},
+		{"", false},
+	}
+	for _, c := range cases {
+		got := tgMsgSetFor(c.lang)
+		isZH := got.granted == tgMsgsZH.granted
+		if isZH != c.zh {
+			t.Fatalf("lang=%q: expected zh=%v, got zh=%v", c.lang, c.zh, isZH)
+		}
+	}
+}