feat: image variants engine

internal/domain/audit/auditChanges.go

@@ -2,6 +2,7 @@ package audit
 
 import (
 	"RenewCMS/internal/domain/article"
+	"RenewCMS/internal/domain/image"
 	"strconv"
 	"unicode/utf8"
 )
@@ -28,3 +29,34 @@ func ArticleChanges(before article.Article, after article.Article) []Change {
 	}
 	return changes
 }
+
+func VariantChanges(before image.VariantSettings, after image.VariantSettings) []Change {
+	changes := []Change{}
+	changes = appendChange(changes, FieldWidth, image.DimensionText(before.Width), image.DimensionText(after.Width))
+	changes = appendChange(changes, FieldHeight, image.DimensionText(before.Height), image.DimensionText(after.Height))
+	changes = appendChange(changes, FieldFit, string(before.Fit), string(after.Fit))
+	changes = appendChange(changes, FieldFormat, string(before.Format), string(after.Format))
+	changes = appendChange(changes, FieldQuality, image.QualityText(before.Quality), image.QualityText(after.Quality))
+	return changes
+}
+
+func appendChange(changes []Change, field string, before string, after string) []Change {
+	if before == after {
+		return changes
+	}
+	return append(changes, TextChange(field, before, after))
+}
+
+func VariantParams(settings image.VariantSettings) map[string]any {
+	params := map[string]any{ParamFit: string(settings.Fit), ParamFormat: string(settings.Format)}
+	if settings.Width != nil {
+		params[ParamWidth] = *settings.Width
+	}
+	if settings.Height != nil {
+		params[ParamHeight] = *settings.Height
+	}
+	if settings.Quality != nil {
+		params[ParamQuality] = *settings.Quality
+	}
+	return params
+}