package ioutil

import (
	"encoding/json"
	"io"
	"io/ioutil"

	validator "gopkg.in/go-playground/validator.v9"
)

var Validate = validator.New()

func ExtractJSON(reader io.Reader, vv ...interface{}) error {
	data, err := ioutil.ReadAll(reader)
	if err != nil {
		return err
	}

	for _, v := range vv {
		if err := json.Unmarshal(data, v); err != nil {
			return err
		}
	}

	return nil
}

func ExtractAndValidateJSON(reader io.Reader, vv ...interface{}) error {
	data, err := ioutil.ReadAll(reader)
	if err != nil {
		return err
	}

	for _, v := range vv {
		if err := json.Unmarshal(data, v); err != nil {
			return err
		}

		if err := Validate.Struct(v); err != nil {
			return err
		}
	}

	return nil
}