// 2020 Rackspace, Inc.
//
// 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 netparse

import (
	"regexp"
	"strconv"
	"strings"
)

func regexpStrOrEmpty(re *regexp.Regexp, s string) string {
	t := re.FindStringSubmatch(s)
	if len(t) > 0 {
		return t[1]
	}
	return ""
}

func regexpAtoiOrNegOne(re *regexp.Regexp, s string) int {
	t := re.FindStringSubmatch(s)
	if len(t) > 0 {
		if i, err := strconv.Atoi(t[1]); err == nil {
			return i
		}
	}
	return -1
}

func splitAndTrim(s, delim string) []string {
	r := make([]string, 0)
	for _, c := range strings.Split(s, delim) {
		if trimmed := strings.TrimSpace(c); trimmed != "" {
			r = append(r, trimmed)
		}
	}
	return r
}

// Atoi returns converts a string to an integer and returns the int. If conversion fails it returns -99999
func Atoi(str string) int {
	if n, err := strconv.Atoi(str); err == nil {
		return n
	}
	return -9999
}