feat(usage stats): added data source count stats

pkg/models/datasource.go

@@ -12,6 +12,8 @@ const (
 	DS_ES            = "elasticsearch"
 	DS_OPENTSDB      = "opentsdb"
 	DS_CLOUDWATCH    = "cloudwatch"
+	DS_KAIROSDB      = "kairosdb"
+	DS_PROMETHEUS    = "prometheus"
 	DS_ACCESS_DIRECT = "direct"
 	DS_ACCESS_PROXY  = "proxy"
 )
@@ -45,6 +47,25 @@ type DataSource struct {
 	Updated time.Time
 }
 
+func IsStandardDataSource(dsType string) bool {
+	switch dsType {
+	case DS_ES:
+		return true
+	case DS_INFLUXDB:
+		return true
+	case DS_OPENTSDB:
+		return true
+	case DS_CLOUDWATCH:
+		return true
+	case DS_PROMETHEUS:
+		return true
+	case DS_GRAPHITE:
+		return true
+	default:
+		return false
+	}
+}
+
 // ----------------------
 // COMMANDS