General purpose DTO in Go

table_dto.go

package main

import (
	"fmt"
	"reflect"
)

type User struct {
	ID       int
	Name     string
	Email    string
	IsActive bool
}

var user = User{1, "Jon Doe", "[email protected]", true}

func main() {
	tbl := NewTableDTO(&user)
	fmt.Println(tbl)
}

type FieldDTO struct {
	Field reflect.StructField
	Value reflect.Value
}

type TableDTO struct {
	Type   reflect.Type
	Fields []FieldDTO
}

func NewTableDTO(v any) *TableDTO {
	t := &TableDTO{
		Type:   reflect.Indirect(reflect.ValueOf(v)).Type(),
		Fields: make([]FieldDTO, 0),
	}
	ParseStruct(v, func(f reflect.StructField, v reflect.Value) {
		t.Fields = append(t.Fields, FieldDTO{
			Field: f,
			Value: v,
		})
	})
	return t
}

func ParseStruct(v any, fn func(reflect.StructField, reflect.Value)) {
	val := reflect.Indirect(reflect.ValueOf(v))
	for i := 0; i < val.NumField(); i++ {
		fn(val.Type().Field(i), val.Field(i))
	}
}