// Copyright 2020 The Prometheus Authors

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

package utils

import (

"regexp"

"strings"

"github.com/fatih/camelcase"

)

var (

safeNameRE = regexp.MustCompile(`[^a-zA-Z0-9_]*$`)

)

func NormalizeMetricName(metricName string) string {

var normalizedMetricName []string

words := camelcase.Split(metricName)

for _, word := range words {

safeWord := strings.Trim(safeNameRE.ReplaceAllLiteralString(word, "_"), "_")

lowerWord := strings.TrimSpace(strings.ToLower(safeWord))

if lowerWord != "" {

normalizedMetricName = append(normalizedMetricName, lowerWord)

}

}

return strings.Join(normalizedMetricName, "_")

}

func ProjectResource(projectID string) string {

return "projects/" + projectID

}