From c906aaf9278fd5f9df8551600dfaa57ff557733d Mon Sep 17 00:00:00 2001
From: Juan Font <juanfontalonso@gmail.com>
Date: Wed, 17 Apr 2024 22:08:32 +0000
Subject: [PATCH] Allow to remove forced tags of a node

Set as empty StringList
---
 hscontrol/db/node.go      | 5 +++++
 hscontrol/db/node_test.go | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/hscontrol/db/node.go b/hscontrol/db/node.go
index b397721424..109fd610a9 100644
--- a/hscontrol/db/node.go
+++ b/hscontrol/db/node.go
@@ -206,6 +206,11 @@ func SetTags(
 	tags []string,
 ) error {
 	if len(tags) == 0 {
+		// if no tags are provided, we remove all forced tags
+		if err := tx.Model(&types.Node{}).Where("id = ?", nodeID).Update("forced_tags", types.StringList{}).Error; err != nil {
+			return fmt.Errorf("failed to remove tags for node in the database: %w", err)
+		}
+
 		return nil
 	}
 
diff --git a/hscontrol/db/node_test.go b/hscontrol/db/node_test.go
index 84116f25b6..9ff022871a 100644
--- a/hscontrol/db/node_test.go
+++ b/hscontrol/db/node_test.go
@@ -386,6 +386,13 @@ func (s *Suite) TestSetTags(c *check.C) {
 		check.DeepEquals,
 		types.StringList([]string{"tag:bar", "tag:test", "tag:unknown"}),
 	)
+
+	// test removing tags
+	err = db.SetTags(node.ID, []string{})
+	c.Assert(err, check.IsNil)
+	node, err = db.getNode("test", "testnode")
+	c.Assert(err, check.IsNil)
+	c.Assert(node.ForcedTags, check.DeepEquals, types.StringList([]string{}))
 }
 
 func TestHeadscale_generateGivenName(t *testing.T) {