Chore: Use context.Context for the get home dashboard API endpoint (#36735)

Use context.Context for the get home dashboard API endpoint.

Ref #36734

pkg/api/dashboard.go

@@ -423,7 +423,7 @@ func (hs *HTTPServer) GetHomeDashboard(c *models.ReqContext) response.Response {
 	prefsQuery := models.GetPreferencesWithDefaultsQuery{User: c.SignedInUser}
 	homePage := hs.Cfg.HomePage
 
-	if err := hs.Bus.Dispatch(&prefsQuery); err != nil {
+	if err := hs.Bus.DispatchCtx(c.Req.Context(), &prefsQuery); err != nil {
 		return response.Error(500, "Failed to get preferences", err)
 	}
 
@@ -434,7 +434,7 @@ func (hs *HTTPServer) GetHomeDashboard(c *models.ReqContext) response.Response {
 
 	if prefsQuery.Result.HomeDashboardId != 0 {
 		slugQuery := models.GetDashboardRefByIdQuery{Id: prefsQuery.Result.HomeDashboardId}
-		err := hs.Bus.Dispatch(&slugQuery)
+		err := hs.Bus.DispatchCtx(c.Req.Context(), &slugQuery)
 		if err == nil {
 			url := models.GetDashboardUrl(slugQuery.Result.Uid, slugQuery.Result.Slug)
 			dashRedirect := dtos.DashboardRedirect{RedirectUri: url}

pkg/api/dashboard_test.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"net/http"
 	"path/filepath"
 	"testing"
 
@@ -25,10 +26,13 @@ import (
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"gopkg.in/macaron.v1"
 )
 
 func TestGetHomeDashboard(t *testing.T) {
-	req := &models.ReqContext{SignedInUser: &models.SignedInUser{}}
+	httpReq, err := http.NewRequest(http.MethodGet, "", nil)
+	require.NoError(t, err)
+	req := &models.ReqContext{SignedInUser: &models.SignedInUser{}, Context: &macaron.Context{Req: macaron.Request{Request: httpReq}}}
 	cfg := setting.NewCfg()
 	cfg.StaticRootPath = "../../public/"
 
@@ -36,7 +40,7 @@ func TestGetHomeDashboard(t *testing.T) {
 		Cfg: cfg, Bus: bus.New(),
 		PluginManager: &fakePluginManager{},
 	}
-	hs.Bus.AddHandler(func(query *models.GetPreferencesWithDefaultsQuery) error {
+	hs.Bus.AddHandlerCtx(func(_ context.Context, query *models.GetPreferencesWithDefaultsQuery) error {
 		query.Result = &models.Preferences{
 			HomeDashboardId: 0,
 		}

pkg/api/index.go

@@ -400,7 +400,7 @@ func (hs *HTTPServer) setIndexViewData(c *models.ReqContext) (*dtos.IndexViewDat
 	settings["dateFormats"] = hs.Cfg.DateFormats
 
 	prefsQuery := models.GetPreferencesWithDefaultsQuery{User: c.SignedInUser}
-	if err := bus.Dispatch(&prefsQuery); err != nil {
+	if err := bus.DispatchCtx(c.Req.Context(), &prefsQuery); err != nil {
 		return nil, err
 	}
 	prefs := prefsQuery.Result