isZero

go.mod

@@ -26,10 +26,12 @@ require (
 	github.com/coocood/freecache v1.2.1
 	github.com/go-playground/assert/v2 v2.0.1
 	github.com/go-redis/redis/v8 v8.11.5
+	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.1
 	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
 	golang.org/x/exp v0.0.0-20220414153411-bcd21879b8fd
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 

go.sum

@@ -53,6 +53,8 @@ github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjY
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
 github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
@@ -91,6 +93,8 @@ golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAG
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

structs/options.go

@@ -41,9 +41,7 @@ func DeepCopy() optionFunc {
 }
 
 func SkipField(field string) optionFunc {
-	return func(o *option) {
-		o.SkipFields = append(o.SkipFields, field)
-	}
+	return SkipFields([]string{field})
 }
 
 func SkipFields(fields []string) optionFunc {

structs/struct_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 
 	"github.com/charlienet/go-mixed/structs"
-	"github.com/go-playground/assert/v2"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestNew(t *testing.T) {
@@ -19,3 +19,22 @@ func TestNew(t *testing.T) {
 	t.Log(s.Names())
 	t.Log(s.Values())
 }
+
+func TestIsZero(t *testing.T) {
+	var v1 int
+	assert.True(t, structs.IsZero(v1))
+
+	var v2 = struct {
+		Msg string
+	}{}
+	assert.True(t, structs.IsZero(v2))
+
+	var v3 = struct {
+		VV  int
+		Msg string
+	}{Msg: "abc"}
+	assert.False(t, structs.IsZero(v3))
+
+	v3.Msg = ""
+	assert.True(t, structs.IsZero(v3))
+}

structs/structs.go

@@ -53,6 +53,17 @@ func (s *Struct) Values() []any {
 	return values
 }
 
+func (s *Struct) IsZero() bool {
+	for _, fi := range s.fields {
+		source := s.value.FieldByName(fi.name)
+		if !source.IsZero() {
+			return false
+		}
+	}
+
+	return true
+}
+
 func (s *Struct) ToMap() map[string]any {
 	m := make(map[string]any, len(s.fields))
 	for _, fi := range s.fields {
@@ -112,6 +123,16 @@ func Map2Struct(o map[string]any, dst any) {
 
 }
 
+func IsZero(o any) bool {
+	v := reflect.ValueOf(o)
+	if v.IsZero() {
+		return true
+	}
+
+	s := New(o)
+	return s.IsZero()
+}
+
 func Struct2Map(o any, opts ...optionFunc) map[string]any {
 	return New(o, opts...).ToMap()
 }