v3 - main to cut out

pkg/utils/utils.go

@@ -0,0 +1,95 @@
+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:]
+}
+
+//Get the intersection of two slices
+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
+}
+
+//Get the diff of two slices
+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 RemoveRepeatedStringInList(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
+}