package article

import (
	"bytes"
	"errors"
	"strconv"
	"time"
)

type Article struct {
	ID          int64
	Date        time.Time
	Title       string
	Description string
	Body        []byte
}

func New(body, meta []byte) (article *Article, err error) {
	article = &Article{Body: body}
	err = article.ParseMetadata(meta)
	return
}

func (artcl *Article) ParseMetadata(data []byte) error {
	lines := bytes.Split(data, []byte{'\n'})
	if len(lines) != 4 {
		return errors.New("metadata file is not complete. 4 lines (id, title, date(DD MM YYYY), descr) should present")
	}

	artcl.ID, _ = strconv.ParseInt(string(lines[0]), 10, 64)
	artcl.Title = string(lines[1])
	date, err := time.Parse("02 01 2006", string(lines[2]))
	if err != nil {
		return err
	}
	artcl.Date = date

	artcl.Description = string(lines[3])

	return nil
}