Add warnings for health issues

libts/state.go

@@ -30,6 +30,11 @@ type State struct {
 	// Peer status of the local node.
 	Self *ipnstate.PeerStatus
 
+	// Health contains health check problems.
+	// Empty means everything is good. (or at least that no known
+	// problems are detected)
+	Health []string
+
 	// Tailnet lock key. Nil if not enabled.
 	LockKey *key.NLPublic
 	// True if the node is locked out by tailnet lock.
@@ -79,6 +84,7 @@ func MakeState(status *ipnstate.Status, prefs *ipn.Prefs, lock *ipnstate.Network
 		BackendState:    status.BackendState,
 		TSVersion:       status.Version,
 		Self:            status.Self,
+		Health:          status.Health,
 		SortedExitNodes: getSortedExitNodes(status),
 	}
 

ui/appmenu.go

@@ -45,6 +45,7 @@ func (i *AppmenuItem) render(isSelected bool, isAnySubmenuOpen bool) string {
 	arrow := style.
 		Padding(0, 1).
 		Render(">")
+
 	return left + right + arrow
 }
 

view.go

@@ -79,6 +79,21 @@ func renderLockedOutWarning(m *model) string {
 	return lipgloss.PlaceHorizontal(m.terminalWidth, lipgloss.Center, lockedOutWarning)
 }
 
+// Render the locked out warning. Returns static output; should be called conditionally.
+func renderWarnings(m *model) string {
+	bodyText := "Warning: "
+
+	for i, issue := range m.state.Health {
+		bodyText += issue
+
+		if i != len(m.state.Health)-1 {
+			bodyText += ", "
+		}
+	}
+
+	return bodyText
+}
+
 // Format the top header section.
 func renderHeader(m *model) string {
 	logo := lipgloss.NewStyle().
@@ -113,6 +128,12 @@ func renderHeader(m *model) string {
 			Render("--")
 	}
 
+	status += "\n"
+
+	if len(m.state.Health) != 0 {
+		status += renderWarnings(m) + "\n\n"
+	}
+
 	// App versions.
 	versions := "tsui:      " + Version + "\n"
 	versions += "tailscale: "