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Open-IM-Server/pkg/utils/utils.go

92 lines
1.8 KiB

package utils
import (
"github.com/jinzhu/copier"
"github.com/pkg/errors"
"math/rand"
"runtime"
"strconv"
"strings"
"time"
)
// copy a by b b->a
func CopyStructFields(a interface{}, b interface{}, fields ...string) (err error) {
return copier.Copy(a, b)
}
func Wrap(err error, message string) error {
return errors.Wrap(err, "==> "+printCallerNameAndLine()+message)
}
func WithMessage(err error, message string) error {
return errors.WithMessage(err, "==> "+printCallerNameAndLine()+message)
}
func printCallerNameAndLine() string {
pc, _, line, _ := runtime.Caller(2)
return runtime.FuncForPC(pc).Name() + "()@" + strconv.Itoa(line) + ": "
}
func GetSelfFuncName() string {
pc, _, _, _ := runtime.Caller(1)
return cleanUpFuncName(runtime.FuncForPC(pc).Name())
}
func cleanUpFuncName(funcName string) string {
end := strings.LastIndex(funcName, ".")
if end == -1 {
return ""
}
return funcName[end+1:]
}
func Intersect(slice1, slice2 []uint32) []uint32 {
m := make(map[uint32]bool)
n := make([]uint32, 0)
for _, v := range slice1 {
m[v] = true
}
for _, v := range slice2 {
flag, _ := m[v]
if flag {
n = append(n, v)
}
}
return n
}
func Difference(slice1, slice2 []uint32) []uint32 {
m := make(map[uint32]bool)
n := make([]uint32, 0)
inter := Intersect(slice1, slice2)
for _, v := range inter {
m[v] = true
}
for _, v := range slice1 {
if !m[v] {
n = append(n, v)
}
}
for _, v := range slice2 {
if !m[v] {
n = append(n, v)
}
}
return n
}
func OperationIDGenerator() string {
return strconv.FormatInt(time.Now().UnixNano()+int64(rand.Uint32()), 10)
}
func RemoveUserIDRepByMap(slc []string) []string {
var result []string
tempMap := map[string]byte{}
for _, e := range slc {
l := len(tempMap)
tempMap[e] = 0
if len(tempMap) != l {
result = append(result, e)
}
}
return result
}