feat: activity log producers

internal/domain/audit/auditChanges.go

@@ -0,0 +1,30 @@
+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
+}