ipn/ipnlocal,others: add tailnet display name to user profilemarwan/displayname

This PR adds the new editable display name for a tailnet which
will be the preferred display in client UIs and CLIs when
fast user switching between profiles.

Updates #9286

Signed-off-by: Marwan Sulaiman <marwan@tailscale.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/types/netmap/netmap.go b/types/netmap/netmap.go
index 233dcc656..e92a63278 100644
--- a/types/netmap/netmap.go
+++ b/types/netmap/netmap.go
@@ -68,6 +68,8 @@ type NetworkMap struct {
 
 	// Domain is the current Tailnet name.
 	Domain string
+	// DisplayName is the user editable version of the Domain.
+	DisplayName string `json:",omitempty"`
 
 	// DomainAuditLogID is an audit log ID provided by control and
 	// only populated if the domain opts into data-plane audit logging.
@@ -187,6 +189,15 @@ func (nm *NetworkMap) DomainName() string {
 	return nm.Domain
 }
 
+// DisplayName returns the name of the NetworkMap's current tailnet user
+// editable display name. If the map is nil, it returns an empty string.
+func (nm *NetworkMap) GetDisplayName() string {
+	if nm == nil {
+		return ""
+	}
+	return nm.DisplayName
+}
+
 // SelfCapabilities returns SelfNode.Capabilities if nm and nm.SelfNode are
 // non-nil. This is a method so we can use it in envknob/logknob without a
 // circular dependency.