package audit

import (
	"RenewCMS/internal/domain/article"
	"strconv"
	"unicode/utf8"
)

func TextChange(field string, before string, after string) Change {
	return Change{Field: field, Kind: ChangeText, Before: &before, After: &after}
}

func BodyChange(before string, after string) Change {
	delta := utf8.RuneCountInString(after) - utf8.RuneCountInString(before)
	return Change{Field: FieldBody, Kind: ChangeBody, Delta: &delta}
}

func ArticleChanges(before article.Article, after article.Article) []Change {
	changes := []Change{}
	if before.Title != after.Title {
		changes = append(changes, TextChange(FieldTitle, before.Title, after.Title))
	}
	if before.IsOnline != after.IsOnline {
		changes = append(changes, TextChange(FieldOnline, strconv.FormatBool(before.IsOnline), strconv.FormatBool(after.IsOnline)))
	}
	if before.Body != after.Body {
		changes = append(changes, BodyChange(before.Body, after.Body))
	}
	return changes
}