feat: 增加 SafeW 已监控群列表接口

通过 getUpdates 将群写入 Redis，供创建/编辑渠道时选择 chat_id，避免前端重复传递 token。

internal/handler/channel.go

@@ -2,11 +2,16 @@ package handler
 
 import (
 	"encoding/json"
+	"fmt"
+	"log/slog"
 	"net/http"
 	"strconv"
+	"strings"
 
+	"aiaa-notification-service/internal/adapter"
 	"aiaa-notification-service/internal/cache"
 	"aiaa-notification-service/internal/model"
+	"aiaa-notification-service/internal/safew"
 	"aiaa-notification-service/internal/store"
 
 	"github.com/gin-gonic/gin"
@@ -15,10 +20,11 @@ import (
 type ChannelHandler struct {
 	store *store.Store
 	cache *cache.Cache
+	chats *safew.Watcher
 }
 
-func NewChannelHandler(s *store.Store, c *cache.Cache) *ChannelHandler {
-	return &ChannelHandler{store: s, cache: c}
+func NewChannelHandler(s *store.Store, c *cache.Cache, w *safew.Watcher) *ChannelHandler {
+	return &ChannelHandler{store: s, cache: c, chats: w}
 }
 
 type createChannelReq struct {
@@ -96,3 +102,80 @@ func (h *ChannelHandler) Delete(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, gin.H{"ok": true})
 }
+
+type listSafewChatsReq struct {
+	Token string `json:"token"`
+	Q     string `json:"q"`
+}
+
+func (h *ChannelHandler) ListSafewChats(c *gin.Context) {
+	var req listSafewChatsReq
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	h.respondSafewChats(c, strings.TrimSpace(req.Token), req.Q)
+}
+
+func (h *ChannelHandler) ListChannelSafewChats(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	ch, err := h.store.GetChannel(c.Request.Context(), id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "channel not found"})
+		return
+	}
+	token, err := safewTokenFromChannel(ch)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	h.respondSafewChats(c, token, c.Query("q"))
+}
+
+func (h *ChannelHandler) respondSafewChats(c *gin.Context, token, q string) {
+	if token == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "safew token is required"})
+		return
+	}
+	if h.chats == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "safew chat list unavailable"})
+		return
+	}
+	h.chats.Ensure(token)
+	if err := h.chats.Refresh(c.Request.Context(), token); err != nil {
+		if _, ok := err.(*adapter.SafewAuthError); ok {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
+			return
+		}
+		slog.Warn("safew refresh", "error", err)
+	}
+	list, err := h.chats.List(c.Request.Context(), token, q)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if list == nil {
+		list = []adapter.SafewChat{}
+	}
+	c.JSON(http.StatusOK, gin.H{"data": list, "total": len(list)})
+}
+
+func safewTokenFromChannel(ch *model.Channel) (string, error) {
+	if ch.Type != "safew" {
+		return "", fmt.Errorf("channel is not safew")
+	}
+	if ch.Config == nil {
+		return "", fmt.Errorf("safew token is required")
+	}
+	var cfg struct {
+		Token string `json:"token"`
+	}
+	if err := json.Unmarshal(*ch.Config, &cfg); err != nil {
+		return "", fmt.Errorf("safew token is required")
+	}
+	token := strings.TrimSpace(cfg.Token)
+	if token == "" {
+		return "", fmt.Errorf("safew token is required")
+	}
+	return token, nil
+}