/
structs.go
135 lines (113 loc) · 2.31 KB
/
structs.go
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package help
import (
"fmt"
"reflect"
"strings"
)
type Struct struct {
I interface{}
compatibleTag string
useTag string
}
func NewStruct(i interface{}) Struct {
return Struct{
I: i,
}
}
func (s Struct) GetTypeName() string {
var typestr string
typ := reflect.TypeOf(s.I)
typestr = typ.String()
lastDotIndex := strings.LastIndex(typestr, ".")
if lastDotIndex != -1 {
typestr = typestr[lastDotIndex+1:]
}
return typestr
}
func (s Struct) StructName() string {
v := reflect.TypeOf(s.I)
for v.Kind() == reflect.Ptr {
v = v.Elem()
}
return v.Name()
}
func (s Struct) CompatibleTag(tag string) Struct {
s.compatibleTag = tag
return s
}
func (s Struct) UseTag(tag string) Struct {
s.useTag = tag
return s
}
// convert struct to map
// s must to be struct, can not be a pointer
func (s Struct) RawStructToMap(snakeCasedKey bool) M {
v := reflect.ValueOf(s.I)
for v.Kind() == reflect.Ptr {
v = v.Elem()
}
if v.Kind() != reflect.Struct {
panic(fmt.Sprintf("param s must be struct, but got %s", s.I))
}
m := M{}
for i := 0; i < v.NumField(); i++ {
vf := v.Field(i)
if vf.CanInterface() {
vtf := v.Type().Field(i)
key := ""
mark := ""
if snakeCasedKey {
key = Strings(key).SnakeCasedName()
} else {
if s.useTag != "" {
if vtf.Tag.Get(s.useTag) != "" {
key = vtf.Tag.Get(s.useTag)
}
}
if key == "" {
if vtf.Tag.Get("map") != "" {
key = vtf.Tag.Get("map")
}
}
if key == "" {
if s.compatibleTag != "" {
if vtf.Tag.Get(s.compatibleTag) != "" {
key = vtf.Tag.Get(s.compatibleTag)
}
}
}
if key == "" {
key = vtf.Name
}
}
if ks := strings.Split(key, ","); len(ks) > 1 {
key = ks[0]
mark = ks[1]
}
if key == "-" {
continue
}
if mark == "omitempty" && IsBlank(vf) {
continue
}
val := vf.Interface()
if vf.Kind() == reflect.Struct {
valStruct := Struct{I: vf.Interface()}.RawStructToMap(snakeCasedKey)
if len(valStruct) > 0 {
val = valStruct
}
}
m[key] = val
}
}
return m
}
// convert struct to map
func (s Struct) StructToMap() M {
return s.RawStructToMap(false)
}
// convert struct to map
// but struct's field name to snake cased map key
func (s Struct) StructToSnakeKeyMap() M {
return s.RawStructToMap(true)
}