mirror of
https://gitee.com/johng/gf.git
synced 2024-12-02 04:07:47 +08:00
413 lines
11 KiB
Go
413 lines
11 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
package gconv
|
|
|
|
import (
|
|
"reflect"
|
|
"strings"
|
|
|
|
"github.com/gogf/gf/v2/internal/empty"
|
|
"github.com/gogf/gf/v2/internal/json"
|
|
"github.com/gogf/gf/v2/internal/utils"
|
|
)
|
|
|
|
// Map converts any variable `value` to map[string]interface{}. If the parameter `value` is not a
|
|
// map/struct/*struct type, then the conversion will fail and returns nil.
|
|
//
|
|
// If `value` is a struct/*struct object, the second parameter `tags` specifies the most priority
|
|
// tags that will be detected, otherwise it detects the tags in order of:
|
|
// gconv, json, field name.
|
|
func Map(value interface{}, tags ...string) map[string]interface{} {
|
|
return doMapConvert(value, false, tags...)
|
|
}
|
|
|
|
// MapDeep does Map function recursively, which means if the attribute of `value`
|
|
// is also a struct/*struct, calls Map function on this attribute converting it to
|
|
// a map[string]interface{} type variable.
|
|
// Also see Map.
|
|
func MapDeep(value interface{}, tags ...string) map[string]interface{} {
|
|
return doMapConvert(value, true, tags...)
|
|
}
|
|
|
|
// doMapConvert implements the map converting.
|
|
// It automatically checks and converts json string to map if `value` is string/[]byte.
|
|
//
|
|
// TODO completely implement the recursive converting for all types, especially the map.
|
|
func doMapConvert(value interface{}, recursive bool, tags ...string) map[string]interface{} {
|
|
if value == nil {
|
|
return nil
|
|
}
|
|
newTags := StructTagPriority
|
|
switch len(tags) {
|
|
case 0:
|
|
// No need handling.
|
|
case 1:
|
|
newTags = append(strings.Split(tags[0], ","), StructTagPriority...)
|
|
default:
|
|
newTags = append(tags, StructTagPriority...)
|
|
}
|
|
// Assert the common combination of types, and finally it uses reflection.
|
|
dataMap := make(map[string]interface{})
|
|
switch r := value.(type) {
|
|
case string:
|
|
// If it is a JSON string, automatically unmarshal it!
|
|
if len(r) > 0 && r[0] == '{' && r[len(r)-1] == '}' {
|
|
if err := json.UnmarshalUseNumber([]byte(r), &dataMap); err != nil {
|
|
return nil
|
|
}
|
|
} else {
|
|
return nil
|
|
}
|
|
case []byte:
|
|
// If it is a JSON string, automatically unmarshal it!
|
|
if len(r) > 0 && r[0] == '{' && r[len(r)-1] == '}' {
|
|
if err := json.UnmarshalUseNumber(r, &dataMap); err != nil {
|
|
return nil
|
|
}
|
|
} else {
|
|
return nil
|
|
}
|
|
case map[interface{}]interface{}:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = doMapConvertForMapOrStructValue(false, v, recursive, newTags...)
|
|
}
|
|
case map[interface{}]string:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[interface{}]int:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[interface{}]uint:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[interface{}]float32:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[interface{}]float64:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[string]bool:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]int:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]uint:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]float32:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]float64:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]string:
|
|
for k, v := range r {
|
|
dataMap[k] = v
|
|
}
|
|
case map[string]interface{}:
|
|
if recursive {
|
|
// A copy of current map.
|
|
for k, v := range r {
|
|
dataMap[k] = doMapConvertForMapOrStructValue(false, v, recursive, newTags...)
|
|
}
|
|
} else {
|
|
// It returns the map directly without any changing.
|
|
return r
|
|
}
|
|
case map[int]interface{}:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = doMapConvertForMapOrStructValue(false, v, recursive, newTags...)
|
|
}
|
|
case map[int]string:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
case map[uint]string:
|
|
for k, v := range r {
|
|
dataMap[String(k)] = v
|
|
}
|
|
|
|
default:
|
|
// Not a common type, it then uses reflection for conversion.
|
|
var reflectValue reflect.Value
|
|
if v, ok := value.(reflect.Value); ok {
|
|
reflectValue = v
|
|
} else {
|
|
reflectValue = reflect.ValueOf(value)
|
|
}
|
|
reflectKind := reflectValue.Kind()
|
|
// If it is a pointer, we should find its real data type.
|
|
for reflectKind == reflect.Ptr {
|
|
reflectValue = reflectValue.Elem()
|
|
reflectKind = reflectValue.Kind()
|
|
}
|
|
switch reflectKind {
|
|
// If `value` is type of array, it converts the value of even number index as its key and
|
|
// the value of odd number index as its corresponding value, for example:
|
|
// []string{"k1","v1","k2","v2"} => map[string]interface{}{"k1":"v1", "k2":"v2"}
|
|
// []string{"k1","v1","k2"} => map[string]interface{}{"k1":"v1", "k2":nil}
|
|
case reflect.Slice, reflect.Array:
|
|
length := reflectValue.Len()
|
|
for i := 0; i < length; i += 2 {
|
|
if i+1 < length {
|
|
dataMap[String(reflectValue.Index(i).Interface())] = reflectValue.Index(i + 1).Interface()
|
|
} else {
|
|
dataMap[String(reflectValue.Index(i).Interface())] = nil
|
|
}
|
|
}
|
|
case reflect.Map, reflect.Struct, reflect.Interface:
|
|
convertedValue := doMapConvertForMapOrStructValue(true, value, recursive, newTags...)
|
|
if m, ok := convertedValue.(map[string]interface{}); ok {
|
|
return m
|
|
}
|
|
return nil
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
return dataMap
|
|
}
|
|
|
|
func doMapConvertForMapOrStructValue(isRoot bool, value interface{}, recursive bool, tags ...string) interface{} {
|
|
if isRoot == false && recursive == false {
|
|
return value
|
|
}
|
|
var reflectValue reflect.Value
|
|
if v, ok := value.(reflect.Value); ok {
|
|
reflectValue = v
|
|
value = v.Interface()
|
|
} else {
|
|
reflectValue = reflect.ValueOf(value)
|
|
}
|
|
reflectKind := reflectValue.Kind()
|
|
// If it is a pointer, we should find its real data type.
|
|
for reflectKind == reflect.Ptr {
|
|
reflectValue = reflectValue.Elem()
|
|
reflectKind = reflectValue.Kind()
|
|
}
|
|
switch reflectKind {
|
|
case reflect.Map:
|
|
var (
|
|
mapKeys = reflectValue.MapKeys()
|
|
dataMap = make(map[string]interface{})
|
|
)
|
|
for _, k := range mapKeys {
|
|
dataMap[String(k.Interface())] = doMapConvertForMapOrStructValue(
|
|
false,
|
|
reflectValue.MapIndex(k).Interface(),
|
|
recursive,
|
|
tags...,
|
|
)
|
|
}
|
|
return dataMap
|
|
|
|
case reflect.Struct:
|
|
var dataMap = make(map[string]interface{})
|
|
// Map converting interface check.
|
|
if v, ok := value.(iMapStrAny); ok {
|
|
// Value copy, in case of concurrent safety.
|
|
for mapK, mapV := range v.MapStrAny() {
|
|
if recursive {
|
|
dataMap[mapK] = doMapConvertForMapOrStructValue(false, mapV, recursive, tags...)
|
|
} else {
|
|
dataMap[mapK] = mapV
|
|
}
|
|
}
|
|
return dataMap
|
|
}
|
|
// Using reflect for converting.
|
|
var (
|
|
rtField reflect.StructField
|
|
rvField reflect.Value
|
|
reflectType = reflectValue.Type() // attribute value type.
|
|
mapKey = "" // mapKey may be the tag name or the struct attribute name.
|
|
)
|
|
for i := 0; i < reflectValue.NumField(); i++ {
|
|
rtField = reflectType.Field(i)
|
|
rvField = reflectValue.Field(i)
|
|
// Only convert the public attributes.
|
|
fieldName := rtField.Name
|
|
if !utils.IsLetterUpper(fieldName[0]) {
|
|
continue
|
|
}
|
|
mapKey = ""
|
|
fieldTag := rtField.Tag
|
|
for _, tag := range tags {
|
|
if mapKey = fieldTag.Get(tag); mapKey != "" {
|
|
break
|
|
}
|
|
}
|
|
if mapKey == "" {
|
|
mapKey = fieldName
|
|
} else {
|
|
// Support json tag feature: -, omitempty
|
|
mapKey = strings.TrimSpace(mapKey)
|
|
if mapKey == "-" {
|
|
continue
|
|
}
|
|
array := strings.Split(mapKey, ",")
|
|
if len(array) > 1 {
|
|
switch strings.TrimSpace(array[1]) {
|
|
case "omitempty":
|
|
if empty.IsEmpty(rvField.Interface()) {
|
|
continue
|
|
} else {
|
|
mapKey = strings.TrimSpace(array[0])
|
|
}
|
|
default:
|
|
mapKey = strings.TrimSpace(array[0])
|
|
}
|
|
}
|
|
}
|
|
if recursive || rtField.Anonymous {
|
|
// Do map converting recursively.
|
|
var (
|
|
rvAttrField = rvField
|
|
rvAttrKind = rvField.Kind()
|
|
)
|
|
if rvAttrKind == reflect.Ptr {
|
|
rvAttrField = rvField.Elem()
|
|
rvAttrKind = rvAttrField.Kind()
|
|
}
|
|
switch rvAttrKind {
|
|
case reflect.Struct:
|
|
// Embedded struct and has no fields, just ignores it.
|
|
// Eg: gmeta.Meta
|
|
if rvAttrField.Type().NumField() == 0 {
|
|
continue
|
|
}
|
|
var (
|
|
hasNoTag = mapKey == fieldName
|
|
rvAttrInterface = rvAttrField.Interface()
|
|
)
|
|
if hasNoTag && rtField.Anonymous {
|
|
// It means this attribute field has no tag.
|
|
// Overwrite the attribute with sub-struct attribute fields.
|
|
anonymousValue := doMapConvertForMapOrStructValue(false, rvAttrInterface, true, tags...)
|
|
if m, ok := anonymousValue.(map[string]interface{}); ok {
|
|
for k, v := range m {
|
|
dataMap[k] = v
|
|
}
|
|
} else {
|
|
dataMap[mapKey] = rvAttrInterface
|
|
}
|
|
} else if !hasNoTag && rtField.Anonymous {
|
|
// It means this attribute field has desired tag.
|
|
dataMap[mapKey] = doMapConvertForMapOrStructValue(false, rvAttrInterface, true, tags...)
|
|
} else {
|
|
dataMap[mapKey] = doMapConvertForMapOrStructValue(false, rvAttrInterface, recursive, tags...)
|
|
}
|
|
|
|
// The struct attribute is type of slice.
|
|
case reflect.Array, reflect.Slice:
|
|
length := rvAttrField.Len()
|
|
if length == 0 {
|
|
dataMap[mapKey] = rvAttrField.Interface()
|
|
break
|
|
}
|
|
array := make([]interface{}, length)
|
|
for arrayIndex := 0; arrayIndex < length; arrayIndex++ {
|
|
array[arrayIndex] = doMapConvertForMapOrStructValue(
|
|
false, rvAttrField.Index(arrayIndex), recursive, tags...,
|
|
)
|
|
}
|
|
dataMap[mapKey] = array
|
|
case reflect.Map:
|
|
var (
|
|
mapKeys = rvAttrField.MapKeys()
|
|
nestedMap = make(map[string]interface{})
|
|
)
|
|
for _, k := range mapKeys {
|
|
nestedMap[String(k.Interface())] = doMapConvertForMapOrStructValue(
|
|
false,
|
|
rvAttrField.MapIndex(k).Interface(),
|
|
recursive,
|
|
tags...,
|
|
)
|
|
}
|
|
dataMap[mapKey] = nestedMap
|
|
default:
|
|
if rvField.IsValid() {
|
|
dataMap[mapKey] = reflectValue.Field(i).Interface()
|
|
} else {
|
|
dataMap[mapKey] = nil
|
|
}
|
|
}
|
|
} else {
|
|
// No recursive map value converting
|
|
if rvField.IsValid() {
|
|
dataMap[mapKey] = reflectValue.Field(i).Interface()
|
|
} else {
|
|
dataMap[mapKey] = nil
|
|
}
|
|
}
|
|
}
|
|
if len(dataMap) == 0 {
|
|
return value
|
|
}
|
|
return dataMap
|
|
|
|
// The given value is type of slice.
|
|
case reflect.Array, reflect.Slice:
|
|
length := reflectValue.Len()
|
|
if length == 0 {
|
|
break
|
|
}
|
|
array := make([]interface{}, reflectValue.Len())
|
|
for i := 0; i < length; i++ {
|
|
array[i] = doMapConvertForMapOrStructValue(false, reflectValue.Index(i), recursive, tags...)
|
|
}
|
|
return array
|
|
}
|
|
return value
|
|
}
|
|
|
|
// MapStrStr converts `value` to map[string]string.
|
|
// Note that there might be data copy for this map type converting.
|
|
func MapStrStr(value interface{}, tags ...string) map[string]string {
|
|
if r, ok := value.(map[string]string); ok {
|
|
return r
|
|
}
|
|
m := Map(value, tags...)
|
|
if len(m) > 0 {
|
|
vMap := make(map[string]string, len(m))
|
|
for k, v := range m {
|
|
vMap[k] = String(v)
|
|
}
|
|
return vMap
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// MapStrStrDeep converts `value` to map[string]string recursively.
|
|
// Note that there might be data copy for this map type converting.
|
|
func MapStrStrDeep(value interface{}, tags ...string) map[string]string {
|
|
if r, ok := value.(map[string]string); ok {
|
|
return r
|
|
}
|
|
m := MapDeep(value, tags...)
|
|
if len(m) > 0 {
|
|
vMap := make(map[string]string, len(m))
|
|
for k, v := range m {
|
|
vMap[k] = String(v)
|
|
}
|
|
return vMap
|
|
}
|
|
return nil
|
|
}
|