refactor: Extract services form router

route/rule/rule_default.go

@@ -219,7 +219,7 @@ func NewDefaultRule(ctx context.Context, logger log.ContextLogger, options optio
 		rule.allItems = append(rule.allItems, item)
 	}
 	if options.ClashMode != "" {
-		item := NewClashModeItem(router, options.ClashMode)
+		item := NewClashModeItem(ctx, options.ClashMode)
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_dns.go

@@ -216,7 +216,7 @@ func NewDefaultDNSRule(ctx context.Context, logger log.ContextLogger, options op
 		rule.allItems = append(rule.allItems, item)
 	}
 	if options.ClashMode != "" {
-		item := NewClashModeItem(router, options.ClashMode)
+		item := NewClashModeItem(ctx, options.ClashMode)
 		rule.items = append(rule.items, item)
 		rule.allItems = append(rule.allItems, item)
 	}

route/rule/rule_item_clash_mode.go

@@ -1,31 +1,38 @@
 package rule
 
 import (
+	"context"
 	"strings"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing/service"
 )
 
 var _ RuleItem = (*ClashModeItem)(nil)
 
 type ClashModeItem struct {
-	router adapter.Router
-	mode   string
+	ctx         context.Context
+	clashServer adapter.ClashServer
+	mode        string
 }
 
-func NewClashModeItem(router adapter.Router, mode string) *ClashModeItem {
+func NewClashModeItem(ctx context.Context, mode string) *ClashModeItem {
 	return &ClashModeItem{
-		router: router,
-		mode:   mode,
+		ctx:  ctx,
+		mode: mode,
 	}
 }
 
+func (r *ClashModeItem) Start() error {
+	r.clashServer = service.FromContext[adapter.ClashServer](r.ctx)
+	return nil
+}
+
 func (r *ClashModeItem) Match(metadata *adapter.InboundContext) bool {
-	clashServer := r.router.ClashServer()
-	if clashServer == nil {
+	if r.clashServer == nil {
 		return false
 	}
-	return strings.EqualFold(clashServer.Mode(), r.mode)
+	return strings.EqualFold(r.clashServer.Mode(), r.mode)
 }
 
 func (r *ClashModeItem) String() string {