From 448debd620fea302e1cdc0c6bde1b792a6f347c6 Mon Sep 17 00:00:00 2001
From: mzz2017 <2017@duck.com>
Date: Sun, 12 Feb 2023 11:17:10 +0800
Subject: [PATCH] feat: support no group filter

---
 component/outbound/filter.go | 5 +++++
 config/config.go             | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/component/outbound/filter.go b/component/outbound/filter.go
index 94265d7..be83788 100644
--- a/component/outbound/filter.go
+++ b/component/outbound/filter.go
@@ -51,6 +51,11 @@ func NewDialerSetFromLinks(option *dialer.GlobalOption, tagToNodeList map[string
 }
 
 func (s *DialerSet) filterHit(dialer *dialer.Dialer, filters []*config_parser.Function) (hit bool, err error) {
+	if len(filters) == 0 {
+		// No filter.
+		return true, nil
+	}
+
 	// Example
 	// filter: name(regex:'^.*hk.*$', keyword:'sg') && name(keyword:'disney')
 	// filter: !name(regex: 'HK|TW|SG') && name(keyword: disney)
diff --git a/config/config.go b/config/config.go
index b6ca01c..a2b0fdd 100644
--- a/config/config.go
+++ b/config/config.go
@@ -32,7 +32,7 @@ type Group struct {
 }
 
 type GroupParam struct {
-	Filter []*config_parser.Function `mapstructure:"filter" required:""`
+	Filter []*config_parser.Function `mapstructure:"filter"`
 	Policy interface{}               `mapstructure:"policy" required:""`
 }