adds usage stats for alert notifiers (#13173)

pkg/services/sqlstore/stats.go

@@ -13,11 +13,19 @@ func init() {
 	bus.AddHandler("sql", GetDataSourceStats)
 	bus.AddHandler("sql", GetDataSourceAccessStats)
 	bus.AddHandler("sql", GetAdminStats)
+	bus.AddHandlerCtx("sql", GetAlertNotifiersUsageStats)
 	bus.AddHandlerCtx("sql", GetSystemUserCountStats)
 }
 
 var activeUserTimeLimit = time.Hour * 24 * 30
 
+func GetAlertNotifiersUsageStats(ctx context.Context, query *m.GetAlertNotifierUsageStatsQuery) error {
+	var rawSql = `SELECT COUNT(*) as count, type FROM alert_notification GROUP BY type`
+	query.Result = make([]*m.NotifierUsageStats, 0)
+	err := x.SQL(rawSql).Find(&query.Result)
+	return err
+}
+
 func GetDataSourceStats(query *m.GetDataSourceStatsQuery) error {
 	var rawSql = `SELECT COUNT(*) as count, type FROM data_source GROUP BY type`
 	query.Result = make([]*m.DataSourceStats, 0)

pkg/services/sqlstore/stats_test.go

@@ -36,5 +36,11 @@ func TestStatsDataAccess(t *testing.T) {
 			err := GetDataSourceAccessStats(&query)
 			So(err, ShouldBeNil)
 		})
+
+		Convey("Get alert notifier stats should not results in error", func() {
+			query := m.GetAlertNotifierUsageStatsQuery{}
+			err := GetAlertNotifiersUsageStats(context.Background(), &query)
+			So(err, ShouldBeNil)
+		})
 	})
 }