feat: enhance user client context management and improve error handling

client/bot/bot.go

@@ -17,6 +17,12 @@ import (
 	"github.com/krau/SaveAny-Bot/database"
 )
 
+var ectx *ext.Context
+
+func ExtContext() *ext.Context {
+	return ectx
+}
+
 func Init(ctx context.Context) <-chan struct{} {
 	log.FromContext(ctx).Info("初始化 Bot...")
 	resultChan := make(chan struct {
@@ -88,6 +94,7 @@ func Init(ctx context.Context) <-chan struct{} {
 			log.FromContext(ctx).Fatalf("初始化 Bot 失败: %s", result.err)
 		}
 		handlers.Register(result.client.Dispatcher)
+		ectx = result.client.CreateContext()
 		log.FromContext(ctx).Info("Bot 初始化完成")
 	}
 	return shouldRestart

client/bot/handlers/utils/shortcut/message.go

@@ -110,8 +110,10 @@ func GetFilesFromUpdateLinkMessageWithReplyEdit(ctx *ext.Context, update *ext.Up
 
 	tctx := ctx
 	if config.C().Telegram.Userbot.Enable {
+		if uc.GetCtx() != nil {
 			tctx = uc.GetCtx()
 		}
+	}
 
 	for _, link := range msgLinks {
 		linkUrl, err := url.Parse(link)

client/bot/handlers/watch.go

@@ -152,6 +152,9 @@ func handleUnwatchCmd(ctx *ext.Context, update *ext.Update) error {
 }
 
 func listenMediaMessageEvent(ch chan userclient.MediaMessageEvent) {
+	if userclient.GetCtx() == nil {
+		return
+	}
 	logger := log.FromContext(userclient.GetCtx())
 	for event := range ch {
 		logger.Debug("Received media message event", "chat_id", event.ChatID, "file_name", event.File.Name())

client/user/userclient.go

@@ -23,23 +23,16 @@ var uc *gotgproto.Client
 var ectx *ext.Context
 
 func GetCtx() *ext.Context {
-	if uc == nil {
-		panic("User client is not initialized, please call Login first")
-	}
 	if ectx != nil {
 		return ectx
 	}
+	if uc == nil {
+		return nil
+	}
 	ectx = uc.CreateContext()
 	return ectx
 }
 
-func GetClient() *gotgproto.Client {
-	if uc == nil {
-		panic("User client is not initialized, please call Login first")
-	}
-	return uc
-}
-
 func Login(ctx context.Context) (*gotgproto.Client, error) {
 	log.FromContext(ctx).Debug("Logging in user client")
 	if uc != nil {