forked from kakao/cite
/
util.go
87 lines (76 loc) · 2 KB
/
util.go
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package models
import (
"encoding/json"
"fmt"
"hash/fnv"
"regexp"
"strconv"
"strings"
"sync"
)
type Util struct {
namespacePattern *regexp.Regexp
servicePattern *regexp.Regexp
branchPattern *regexp.Regexp
}
var (
utilOnce sync.Once
utilInst *Util
)
func NewUtil() *Util {
utilOnce.Do(func() {
utilInst = &Util{
namespacePattern: regexp.MustCompile("[^a-z0-9-]"),
servicePattern: regexp.MustCompile("[^a-z0-9]"),
branchPattern: regexp.MustCompile(`[^a-z0-9_-]`),
}
})
return utilInst
}
func (this *Util) normalize(pattern *regexp.Regexp, delim string, repl string, args ...string) string {
names := make([]string, len(args))
for i, arg := range args {
arg = strings.ToLower(arg)
names[i] = pattern.ReplaceAllLiteralString(arg, repl)
}
return strings.Join(names, delim)
}
func (this *Util) Normalize(delim string, args ...string) string {
return this.normalize(this.servicePattern, delim, "", args...)
}
func (this *Util) NormalizeByHyphen(delim string, args ...string) string {
return this.normalize(this.namespacePattern, delim, "-", args...)
}
func (this *Util) NormalizeGitBranch(delim string, args ...string) string {
return this.normalize(this.branchPattern, delim, ".", args...)
}
func (this *Util) Hash(in interface{}) (string, error) {
out, err := json.Marshal(in)
if err != nil {
return "", err
}
hash32 := fnv.New32a()
_, err = hash32.Write(out)
if err != nil {
return "", err
}
return fmt.Sprintf("%x", hash32.Sum32()), nil
}
func (this *Util) TCPPortsToList(in string) ([]int, error) {
var tcpPorts []int
for _, tcpPortStr := range strings.Split(in, ",") {
tcpPortStr = strings.TrimSpace(tcpPortStr)
if len(tcpPortStr) == 0 {
continue
}
tcpPort, err := strconv.Atoi(tcpPortStr)
if err != nil {
return tcpPorts, fmt.Errorf("invalid tcp port %s: %v", tcpPort, err)
}
if tcpPort <= 0 || tcpPort > 65535 {
return tcpPorts, fmt.Errorf("invalid tcp port range %v", tcpPort)
}
tcpPorts = append(tcpPorts, tcpPort)
}
return tcpPorts, nil
}