Add integer support to processors.enum.

Fixes: #7364

plugins/processors/enum/README.md

@@ -2,7 +2,7 @@
 
 The Enum Processor allows the configuration of value mappings for metric tags or fields.
 The main use-case for this is to rewrite status codes such as _red_, _amber_ and
-_green_ by numeric values such as 0, 1, 2. The plugin supports string and bool
+_green_ by numeric values such as 0, 1, 2. The plugin supports string, int and bool
 types for the field values. Multiple tags or fields can be configured with separate
 value mappings for each. Default mapping values can be configured to be
 used for all values, which are not contained in the value_mappings. The

plugins/processors/enum/enum.go

@@ -63,7 +63,7 @@ func (mapper *EnumMapper) applyMappings(metric telegraf.Metric) telegraf.Metric
 	for _, mapping := range mapper.Mappings {
 		if mapping.Field != "" {
 			if originalValue, isPresent := metric.GetField(mapping.Field); isPresent {
-				if adjustedValue, isString := adjustBoolValue(originalValue).(string); isString {
+				if adjustedValue, isString := adjustValue(originalValue).(string); isString {
 					if mappedValue, isMappedValuePresent := mapping.mapValue(adjustedValue); isMappedValuePresent {
 						writeField(metric, mapping.getDestination(), mappedValue)
 					}
@@ -86,11 +86,17 @@ func (mapper *EnumMapper) applyMappings(metric telegraf.Metric) telegraf.Metric
 	return metric
 }
 
-func adjustBoolValue(in interface{}) interface{} {
-	if mappedBool, isBool := in.(bool); isBool == true {
-		return strconv.FormatBool(mappedBool)
+func adjustValue(in interface{}) interface{} {
+	switch val := in.(type) {
+	case bool:
+		return strconv.FormatBool(val)
+	case int64:
+		return strconv.FormatInt(val, 10)
+	case uint64:
+		return strconv.FormatUint(val, 10)
+	default:
+		return in
 	}
-	return in
 }
 
 func (mapping *Mapping) mapValue(original string) (interface{}, bool) {

plugins/processors/enum/enum_test.go

@@ -15,6 +15,8 @@ func createTestMetric() telegraf.Metric {
 		map[string]interface{}{
 			"string_value": "test",
 			"int_value":    int(13),
+			"uint_value":   uint(50),
+			"float_value":  float64(3.14),
 			"true_value":   true,
 		},
 		time.Now(),
@@ -75,12 +77,12 @@ func TestMapsSingleStringValueTag(t *testing.T) {
 	assertTagValue(t, "valuable", "tag", tags)
 }
 
-func TestNoFailureOnMappingsOnNonStringValuedFields(t *testing.T) {
-	mapper := EnumMapper{Mappings: []Mapping{{Field: "int_value", ValueMappings: map[string]interface{}{"13i": int64(7)}}}}
+func TestNoFailureOnMappingsOnNonSupportedValuedFields(t *testing.T) {
+	mapper := EnumMapper{Mappings: []Mapping{{Field: "float_value", ValueMappings: map[string]interface{}{"3.14": "pi"}}}}
 
 	fields := calculateProcessedValues(mapper, createTestMetric())
 
-	assertFieldValue(t, 13, "int_value", fields)
+	assertFieldValue(t, float64(3.14), "float_value", fields)
 }
 
 func TestMapSingleBoolValue(t *testing.T) {
@@ -91,6 +93,22 @@ func TestMapSingleBoolValue(t *testing.T) {
 	assertFieldValue(t, 1, "true_value", fields)
 }
 
+func TestMapSingleIntValue(t *testing.T) {
+	mapper := EnumMapper{Mappings: []Mapping{{Field: "int_value", ValueMappings: map[string]interface{}{"13": int64(14)}}}}
+
+	fields := calculateProcessedValues(mapper, createTestMetric())
+
+	assertFieldValue(t, 14, "int_value", fields)
+}
+
+func TestMapSingleUintValue(t *testing.T) {
+	mapper := EnumMapper{Mappings: []Mapping{{Field: "uint_value", ValueMappings: map[string]interface{}{"50": int64(5)}}}}
+
+	fields := calculateProcessedValues(mapper, createTestMetric())
+
+	assertFieldValue(t, int64(5), "uint_value", fields)
+}
+
 func TestMapsToDefaultValueOnUnknownSourceValue(t *testing.T) {
 	mapper := EnumMapper{Mappings: []Mapping{{Field: "string_value", Default: int64(42), ValueMappings: map[string]interface{}{"other": int64(1)}}}}