Licensing service (#19903)

* Licensing: supplies a service to handle licensing information

* Licensing: uses the license service further

Uses the license service instead of settings.isEnterprise:
- external team members
- saml
- usage stats

* Licensing: fixes broken tests due to new Licensing service dependency

* Licensing: fixes linting errors

* Licensing: exposes license expiry information to the frontend

pkg/infra/usagestats/service.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/login/social"
+	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/sqlstore"
 
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -23,6 +24,7 @@ type UsageStatsService struct {
 	Cfg      *setting.Cfg       `inject:""`
 	Bus      bus.Bus            `inject:""`
 	SQLStore *sqlstore.SqlStore `inject:""`
+	License  models.Licensing   `inject:""`
 
 	oauthProviders map[string]bool
 }

pkg/infra/usagestats/usage_stats.go

@@ -32,7 +32,7 @@ func (uss *UsageStatsService) sendUsageStats(oauthProviders map[string]bool) {
 		"metrics":   metrics,
 		"os":        runtime.GOOS,
 		"arch":      runtime.GOARCH,
-		"edition":   getEdition(),
+		"edition":   getEdition(uss.License.HasValidLicense()),
 		"packaging": setting.Packaging,
 	}
 
@@ -182,8 +182,8 @@ func (uss *UsageStatsService) updateTotalStats() {
 	metrics.StatsTotalActiveAdmins.Set(float64(statsQuery.Result.ActiveAdmins))
 }
 
-func getEdition() string {
-	if setting.IsEnterprise {
+func getEdition(validLicense bool) string {
+	if validLicense {
 		return "enterprise"
 	}
 	return "oss"

pkg/infra/usagestats/usage_stats_test.go

@@ -25,6 +25,7 @@ func TestMetrics(t *testing.T) {
 		uss := &UsageStatsService{
 			Bus:      bus.New(),
 			SQLStore: sqlstore.InitTestDB(t),
+			License:  models.OSSLicensingService{},
 		}
 
 		var getSystemStatsQuery *models.GetSystemStatsQuery