Fiat: handle evInfo empty for some vehicles (#1960)

vehicle/fiat/provider.go

@@ -85,6 +85,10 @@ func (v *Provider) status(statusG func() (StatusResponse, error)) (StatusRespons
 func (v *Provider) SoC() (float64, error) {
 	res, err := v.statusG()
 	if res, ok := res.(StatusResponse); err == nil && ok {
+		if res.EvInfo == nil {
+			return 0, api.ErrNotAvailable
+		}
+
 		return res.EvInfo.Battery.StateOfCharge, nil
 	}
 
@@ -97,6 +101,10 @@ var _ api.VehicleRange = (*Provider)(nil)
 func (v *Provider) Range() (int64, error) {
 	res, err := v.statusG()
 	if res, ok := res.(StatusResponse); err == nil && ok {
+		if res.EvInfo == nil {
+			return 0, api.ErrNotAvailable
+		}
+
 		return int64(res.EvInfo.Battery.DistanceToEmpty.Value), nil
 	}
 
@@ -123,6 +131,10 @@ func (v *Provider) Status() (api.ChargeStatus, error) {
 
 	res, err := v.statusG()
 	if res, ok := res.(StatusResponse); err == nil && ok {
+		if res.EvInfo == nil {
+			return api.StatusNone, api.ErrNotAvailable
+		}
+
 		if res.EvInfo.Battery.PlugInStatus {
 			status = api.StatusB // connected, not charging
 		}

vehicle/fiat/types.go

@@ -23,7 +23,7 @@ type StatusResponse struct {
 		}
 		Timestamp TimeMillis
 	}
-	EvInfo struct {
+	EvInfo *struct {
 		Battery struct {
 			ChargingLevel   string // LEVEL_2
 			ChargingStatus  string // CHARGING
@@ -38,7 +38,7 @@ type StatusResponse struct {
 			TotalRange          int     // 17
 		}
 		Timestamp TimeMillis
-	}
+	} `json:",omitempty"`
 	Timestamp TimeMillis
 }