tailcfg: add VIPServiceView

Not currently used in the OSS tree, a View for tailcfg.VIPService will
make implementing some server side changes easier.

Updates tailscale/corp#26272

Change-Id: If1ed0bea4eff8c4425d3845b433a1c562d99eb9e
Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>

tailcfg/tailcfg_view.go

@@ -19,7 +19,7 @@ import (
 	"tailscale.com/types/views"
 )
 
-//go:generate go run tailscale.com/cmd/cloner  -clonefunc=true -type=User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,RegisterResponseAuth,RegisterRequest,DERPHomeParams,DERPRegion,DERPMap,DERPNode,SSHRule,SSHAction,SSHPrincipal,ControlDialPlan,Location,UserProfile
+//go:generate go run tailscale.com/cmd/cloner  -clonefunc=true -type=User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,RegisterResponseAuth,RegisterRequest,DERPHomeParams,DERPRegion,DERPMap,DERPNode,SSHRule,SSHAction,SSHPrincipal,ControlDialPlan,Location,UserProfile,VIPService
 
 // View returns a read-only view of User.
 func (p *User) View() UserView {
@@ -1414,3 +1414,59 @@ var _UserProfileViewNeedsRegeneration = UserProfile(struct {
 	DisplayName   string
 	ProfilePicURL string
 }{})
+
+// View returns a read-only view of VIPService.
+func (p *VIPService) View() VIPServiceView {
+	return VIPServiceView{ж: p}
+}
+
+// VIPServiceView provides a read-only view over VIPService.
+//
+// Its methods should only be called if `Valid()` returns true.
+type VIPServiceView struct {
+	// ж is the underlying mutable value, named with a hard-to-type
+	// character that looks pointy like a pointer.
+	// It is named distinctively to make you think of how dangerous it is to escape
+	// to callers. You must not let callers be able to mutate it.
+	ж *VIPService
+}
+
+// Valid reports whether v's underlying value is non-nil.
+func (v VIPServiceView) Valid() bool { return v.ж != nil }
+
+// AsStruct returns a clone of the underlying value which aliases no memory with
+// the original.
+func (v VIPServiceView) AsStruct() *VIPService {
+	if v.ж == nil {
+		return nil
+	}
+	return v.ж.Clone()
+}
+
+func (v VIPServiceView) MarshalJSON() ([]byte, error) { return json.Marshal(v.ж) }
+
+func (v *VIPServiceView) UnmarshalJSON(b []byte) error {
+	if v.ж != nil {
+		return errors.New("already initialized")
+	}
+	if len(b) == 0 {
+		return nil
+	}
+	var x VIPService
+	if err := json.Unmarshal(b, &x); err != nil {
+		return err
+	}
+	v.ж = &x
+	return nil
+}
+
+func (v VIPServiceView) Name() ServiceName                  { return v.ж.Name }
+func (v VIPServiceView) Ports() views.Slice[ProtoPortRange] { return views.SliceOf(v.ж.Ports) }
+func (v VIPServiceView) Active() bool                       { return v.ж.Active }
+
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
+var _VIPServiceViewNeedsRegeneration = VIPService(struct {
+	Name   ServiceName
+	Ports  []ProtoPortRange
+	Active bool
+}{})