health: expose DependsOn to local API via UnhealthyState (#12513)

Updates #4136

Small PR to expose the health Warnables dependencies to the GUI via LocalAPI, so that we can only show warnings for root cause issues, and filter out unnecessary messages before user presentation.

Signed-off-by: Andrea Gottardo <andrea@gottardo.me>

health/state.go

@@ -27,8 +27,9 @@ type UnhealthyState struct {
 	Severity     Severity
 	Title        string
 	Text         string
-	BrokenSince  *time.Time `json:",omitempty"`
-	Args         Args       `json:",omitempty"`
+	BrokenSince  *time.Time     `json:",omitempty"`
+	Args         Args           `json:",omitempty"`
+	DependsOn    []WarnableCode `json:",omitempty"`
 }
 
 // unhealthyState returns a unhealthyState of the Warnable given its current warningState.
@@ -40,6 +41,11 @@ func (w *Warnable) unhealthyState(ws *warningState) *UnhealthyState {
 		text = w.Text(Args{})
 	}
 
+	dependsOnWarnableCodes := make([]WarnableCode, len(w.DependsOn))
+	for i, d := range w.DependsOn {
+		dependsOnWarnableCodes[i] = d.Code
+	}
+
 	return &UnhealthyState{
 		WarnableCode: w.Code,
 		Severity:     w.Severity,
@@ -47,6 +53,7 @@ func (w *Warnable) unhealthyState(ws *warningState) *UnhealthyState {
 		Text:         text,
 		BrokenSince:  &ws.BrokenSince,
 		Args:         ws.Args,
+		DependsOn:    dependsOnWarnableCodes,
 	}
 }