Tibber: fix subscription with multiple home ids (#5755)

meter/tibber-pulse.go

@@ -47,10 +47,11 @@ func NewTibberFromConfig(other map[string]interface{}) (api.Meter, error) {
 		// query client
 		qclient := tibber.NewClient(t.log, cc.Token)
 
-		var err error
-		if cc.HomeID, err = qclient.DefaultHomeID(); err != nil {
+		home, err := qclient.DefaultHome("")
+		if err != nil {
 			return nil, err
 		}
+		cc.HomeID = home.ID
 	}
 
 	// subscription client

meter/tibber/client.go

@@ -7,6 +7,7 @@ import (
 	"github.com/evcc-io/evcc/util"
 	"github.com/evcc-io/evcc/util/request"
 	"github.com/shurcooL/graphql"
+	"golang.org/x/exp/slices"
 	"golang.org/x/oauth2"
 )
 
@@ -30,7 +31,7 @@ func NewClient(log *util.Logger, token string) *Client {
 	}
 }
 
-func (c *Client) Home() (Home, error) {
+func (c *Client) Homes() ([]Home, error) {
 	var res struct {
 		Viewer struct {
 			Homes []Home
@@ -41,17 +42,25 @@ func (c *Client) Home() (Home, error) {
 	defer cancel()
 
 	if err := c.Query(ctx, &res, nil); err != nil {
+		return nil, err
+	}
+
+	return res.Viewer.Homes, nil
+}
+
+func (c *Client) DefaultHome(id string) (Home, error) {
+	homes, err := c.Homes()
+	if err != nil {
 		return Home{}, err
 	}
 
-	if len(res.Viewer.Homes) != 1 {
-		return Home{}, fmt.Errorf("could not determine home id: %v", res.Viewer.Homes)
+	idx := slices.IndexFunc(homes, func(h Home) bool {
+		return h.ID == id || (id == "" && len(homes) == 1)
+	})
+
+	if idx == -1 {
+		return Home{}, fmt.Errorf("could not determine home id: %v", homes)
 	}
 
-	return res.Viewer.Homes[0], nil
-}
-
-func (c *Client) DefaultHomeID() (string, error) {
-	home, err := c.Home()
-	return home.ID, err
+	return homes[idx], nil
 }

tariff/tibber.go

@@ -55,7 +55,7 @@ func NewTibberFromConfig(other map[string]interface{}) (api.Tariff, error) {
 	}
 
 	if t.homeID == "" || t.unit == "" {
-		home, err := t.client.Home()
+		home, err := t.client.DefaultHome(t.homeID)
 		if err != nil {
 			return nil, err
 		}