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Copy pathmap.go
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Copy pathmap.go
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320 lines (296 loc) · 10.5 KB
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// Copyright (c) 2014 Dmitry Ponomarev <demdxx@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package gocast
import (
"context"
"reflect"
)
// TryMapCopy converts source into destination or return error
func TryMapCopy[K comparable, V any](dst map[K]V, src any, recursive bool, tags ...string) error {
return TryMapCopyContext(context.Background(), dst, src, recursive, tags...)
}
// TryMapCopyContext converts source into destination or return error
func TryMapCopyContext[K comparable, V any](ctx context.Context, dst map[K]V, src any, recursive bool, tags ...string) error {
if dst == nil || src == nil {
if dst == nil {
return wrapError(ErrInvalidParams, "TryMapCopyContext `destination` parameter is nil")
}
return wrapError(ErrInvalidParams, "TryMapCopyContext `source` parameter is nil")
}
var (
srcVal = reflectTarget(reflect.ValueOf(src))
srcType = srcVal.Type()
)
switch srcType.Kind() {
case reflect.Map:
for _, k := range srcVal.MapKeys() {
field := srcVal.MapIndex(k)
key, err := TryCast[K](k.Interface())
if err == nil {
if recursive {
dst[key], err = TryCastRecursiveContext[V](ctx, field.Interface(), tags...)
} else {
dst[key], err = TryCastContext[V](ctx, field.Interface(), tags...)
}
}
if err != nil {
return wrapError(err, `"`+Str(k.Interface())+`" map key`)
}
}
case reflect.Struct:
for i := 0; i < srcVal.NumField(); i++ {
name, omitempty := fieldNameFromTags(srcType.Field(i), tags...)
if len(name) > 0 {
key, err := TryCast[K](name)
if err != nil {
return err
}
field := srcVal.Field(i)
fl := getValue(field.Interface())
if !omitempty || !IsEmpty(fl) {
if recursive {
dst[key], err = TryCastRecursiveContext[V](ctx, fl, tags...)
} else {
dst[key], err = TryCastContext[V](ctx, fl, tags...)
}
if err != nil {
return wrapError(err, "`"+name+"` struct key")
}
} // end if !omitempty || !IsEmpty(fl)
}
}
default:
return wrapError(ErrUnsupportedSourceType, srcType.String())
}
return nil
}
// ToMap cast your Source into the Destination type
// tag defines the tags name in the structure to map the keys
func ToMap(dst, src any, recursive bool, tags ...string) error {
return ToMapContext(context.Background(), dst, src, recursive, tags...)
}
// ToMap cast your Source into the Destination type
// tag defines the tags name in the structure to map the keys
func ToMapContext(ctx context.Context, dst, src any, recursive bool, tags ...string) error {
if dst == nil || src == nil {
if dst == nil {
return wrapError(ErrInvalidParams, "ToMapContext `destination` parameter is nil")
}
return wrapError(ErrInvalidParams, "ToMapContext `source` parameter is nil")
}
var (
err error
destVal = reflectTarget(reflect.ValueOf(dst))
destType = destVal.Type()
srcVal = reflectTarget(reflect.ValueOf(src))
srcType = srcVal.Type()
)
if dst = destVal.Interface(); dst == nil {
dst = reflect.MakeMap(destType).Interface()
destVal = reflect.ValueOf(dst)
}
switch dest := dst.(type) {
case map[any]any:
switch srcType.Kind() {
case reflect.Map:
for _, k := range srcVal.MapKeys() {
field := srcVal.MapIndex(k)
if recursive {
dest[k.Interface()], err = mapDestValue(field.Interface(), destType, recursive, tags...)
if err != nil {
return wrapError(err, Str(k.Interface()))
}
} else {
dest[k.Interface()] = field.Interface()
}
}
case reflect.Struct:
for i := 0; i < srcVal.NumField(); i++ {
name, omitempty := fieldNameFromTags(srcType.Field(i), tags...)
if len(name) > 0 {
field := srcVal.Field(i)
fl := getValue(field.Interface())
if !omitempty || !IsEmpty(fl) {
if recursive {
dest[name], err = mapDestValue(fl, destType, recursive, tags...)
if err != nil {
return wrapError(err, "`"+name+"` value")
}
} else {
dest[name] = fl
}
} // end if !omitempty || !IsEmpty(fl)
}
}
default:
err = wrapError(ErrUnsupportedSourceType, srcType.String())
}
case map[string]any:
err = TryMapCopyContext(ctx, dest, src, recursive, tags...)
case map[string]string:
err = TryMapCopyContext(ctx, dest, src, recursive, tags...)
default:
switch destType.Kind() {
case reflect.Map, reflect.Struct:
keyType := destType.Key()
elemType := destType.Elem()
switch srcType.Kind() {
case reflect.Map:
for _, k := range srcVal.MapKeys() {
keyVal, err := ReflectTryToTypeContext(ctx, k, keyType, recursive, tags...)
if err != nil {
return wrapError(err, Str(k.Interface()))
}
mapVal := reflectTarget(srcVal.MapIndex(k))
val, err := ReflectTryToTypeContext(ctx, mapVal, elemType, recursive, tags...)
if err != nil {
return wrapError(err, "`"+Str(k.Interface())+"` value")
}
destVal.SetMapIndex(reflect.ValueOf(keyVal), reflect.ValueOf(val))
}
case reflect.Struct:
for i := 0; i < srcVal.NumField(); i++ {
name, omitempty := fieldNameFromTags(srcType.Field(i), tags...)
if len(name) > 0 {
flVal := reflectTarget(srcVal.Field(i))
fl := getValue(flVal.Interface())
if !omitempty || !IsEmpty(fl) {
keyVal, err := TryToType(name, keyType)
if err != nil {
return wrapError(err, name)
}
val, err := ReflectTryToTypeContext(ctx, flVal, elemType, recursive, tags...)
if err != nil {
return wrapError(err, "`"+name+"` value")
}
destVal.SetMapIndex(reflect.ValueOf(keyVal), reflect.ValueOf(val))
}
} // end if
}
default:
err = wrapError(ErrUnsupportedSourceType, srcType.String())
}
default:
err = wrapError(ErrUnsupportedType, destType.String())
}
}
return err
}
// TryMapFrom source creates new map to convert
func TryMapFrom[K comparable, V any](src any, recursive bool, tags ...string) (map[K]V, error) {
return TryMapFromContext[K, V](context.Background(), src, recursive, tags...)
}
// TryMapFrom source creates new map to convert
func TryMapFromContext[K comparable, V any](ctx context.Context, src any, recursive bool, tags ...string) (map[K]V, error) {
dst := make(map[K]V)
err := TryMapCopyContext(ctx, dst, src, recursive, tags...)
return dst, err
}
// TryMapRecursive creates new map to convert from source type with recursive field processing
func TryMapRecursive[K comparable, V any](src any, tags ...string) (map[K]V, error) {
return TryMapFrom[K, V](src, true, tags...)
}
// TryMapRecursiveContext creates new map to convert from source type with recursive field processing
func TryMapRecursiveContext[K comparable, V any](ctx context.Context, src any, tags ...string) (map[K]V, error) {
return TryMapFromContext[K, V](ctx, src, true, tags...)
}
// TryMap creates new map to convert from source type
func TryMap[K comparable, V any](src any, tags ...string) (map[K]V, error) {
return TryMapFrom[K, V](src, false, tags...)
}
// TryMapContext creates new map to convert from source type
func TryMapContext[K comparable, V any](ctx context.Context, src any, tags ...string) (map[K]V, error) {
return TryMapFromContext[K, V](ctx, src, false, tags...)
}
// MapRecursive creates map from source or returns nil
func MapRecursive[K comparable, V any](src any, tags ...string) map[K]V {
m, _ := TryMapRecursive[K, V](src, tags...)
return m
}
// MapRecursiveContext creates map from source or returns nil
func MapRecursiveContext[K comparable, V any](ctx context.Context, src any, tags ...string) map[K]V {
m, _ := TryMapRecursiveContext[K, V](ctx, src, tags...)
return m
}
// Map creates map from source or returns nil
func Map[K comparable, V any](src any, tags ...string) map[K]V {
m, _ := TryMap[K, V](src, tags...)
return m
}
// MapContext creates map from source or returns nil
func MapContext[K comparable, V any](ctx context.Context, src any, tags ...string) map[K]V {
m, _ := TryMapContext[K, V](ctx, src, tags...)
return m
}
// ToMapFrom any Map/Object type
func ToMapFrom(src any, recursive bool, tags ...string) (map[any]any, error) {
dst := make(map[any]any)
err := ToMap(dst, src, recursive, tags...)
return dst, err
}
// IsMap checks if the input value is a Map/Object type
func IsMap(v any) bool {
switch v.(type) {
case map[any]any, map[string]any, map[string]string, map[string]int, map[int]int:
return true
default:
return reflect.ValueOf(v).Kind() == reflect.Map
}
}
///////////////////////////////////////////////////////////////////////////////
/// MARK: Helpers
///////////////////////////////////////////////////////////////////////////////
func reflectMapValueByStringKeys(src reflect.Value, keys []string) any {
mKeys := src.MapKeys()
for _, key := range keys {
for _, mKey := range mKeys {
if Str(mKey.Interface()) == key {
return src.MapIndex(mKey).Interface()
}
}
}
return nil
}
func mapDestValue(fl any, destType reflect.Type, recursive bool, tags ...string) (any, error) {
field := reflect.ValueOf(fl)
switch field.Kind() {
case reflect.Slice, reflect.Array:
if field.Len() > 0 {
switch field.Index(0).Kind() {
case reflect.Map, reflect.Struct:
list := make([]any, 0, field.Len())
for i := 0; i < field.Len(); i++ {
v := reflect.MakeMap(destType).Interface()
if err := ToMap(v, field.Index(i).Interface(), recursive, tags...); err != nil {
return nil, err
}
list = append(list, v)
}
return list, nil
}
}
case reflect.Map, reflect.Struct:
v := reflect.MakeMap(destType).Interface()
if err := ToMap(v, fl, recursive, tags...); err != nil {
return nil, err
}
return v, nil
}
return fl, nil
}