make tags first class node owner (#2885)

This PR changes tags to be something that exists on nodes in addition to users, to being its own thing. It is part of moving our tags support towards the correct tailscale compatible implementation.

There are probably rough edges in this PR, but the intention is to get it in, and then start fixing bugs from 0.28.0 milestone (long standing tags issue) to discover what works and what doesnt.

Updates #2417
Closes #2619

hscontrol/mapper/mapper.go

@@ -73,15 +73,17 @@ func generateUserProfiles(
 	node types.NodeView,
 	peers views.Slice[types.NodeView],
 ) []tailcfg.UserProfile {
-	userMap := make(map[uint]*types.User)
+	userMap := make(map[uint]*types.UserView)
 	ids := make([]uint, 0, len(userMap))
 	user := node.User()
-	userMap[user.ID] = &user
-	ids = append(ids, user.ID)
+	userID := user.Model().ID
+	userMap[userID] = &user
+	ids = append(ids, userID)
 	for _, peer := range peers.All() {
 		peerUser := peer.User()
-		userMap[peerUser.ID] = &peerUser
-		ids = append(ids, peerUser.ID)
+		peerUserID := peerUser.Model().ID
+		userMap[peerUserID] = &peerUser
+		ids = append(ids, peerUserID)
 	}
 
 	slices.Sort(ids)

hscontrol/mapper/mapper_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/juanfont/headscale/hscontrol/types"
 	"tailscale.com/tailcfg"
 	"tailscale.com/types/dnstype"
+	"tailscale.com/types/ptr"
 )
 
 var iap = func(ipStr string) *netip.Addr {
@@ -50,8 +51,8 @@ func TestDNSConfigMapResponse(t *testing.T) {
 			mach := func(hostname, username string, userid uint) *types.Node {
 				return &types.Node{
 					Hostname: hostname,
-					UserID:   userid,
-					User: types.User{
+					UserID:   ptr.To(userid),
+					User: &types.User{
 						Name: username,
 					},
 				}

hscontrol/mapper/tail.go

@@ -83,7 +83,8 @@ func tailNode(
 			tags = append(tags, tag)
 		}
 	}
-	for _, tag := range node.ForcedTags().All() {
+
+	for _, tag := range node.Tags().All() {
 		tags = append(tags, tag)
 	}
 	tags = lo.Uniq(tags)
@@ -99,7 +100,7 @@ func tailNode(
 		Name:     hostname,
 		Cap:      capVer,
 
-		User: tailcfg.UserID(node.UserID()),
+		User: node.TailscaleUserID(),
 
 		Key:       node.NodeKey(),
 		KeyExpiry: keyExpiry.UTC(),

hscontrol/mapper/tail_test.go

@@ -15,6 +15,7 @@ import (
 	"tailscale.com/net/tsaddr"
 	"tailscale.com/tailcfg"
 	"tailscale.com/types/key"
+	"tailscale.com/types/ptr"
 )
 
 func TestTailNode(t *testing.T) {
@@ -97,14 +98,14 @@ func TestTailNode(t *testing.T) {
 				IPv4:      iap("100.64.0.1"),
 				Hostname:  "mini",
 				GivenName: "mini",
-				UserID:    0,
-				User: types.User{
+				UserID:    ptr.To(uint(0)),
+				User: &types.User{
 					Name: "mini",
 				},
-				ForcedTags: []string{},
-				AuthKey:    &types.PreAuthKey{},
-				LastSeen:   &lastSeen,
-				Expiry:     &expire,
+				Tags:     []string{},
+				AuthKey:  &types.PreAuthKey{},
+				LastSeen: &lastSeen,
+				Expiry:   &expire,
 				Hostinfo: &tailcfg.Hostinfo{
 					RoutableIPs: []netip.Prefix{
 						tsaddr.AllIPv4(),