feat: image variants engine

internal/infrastructure/useCases/variantSettings.go

@@ -0,0 +1,31 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/image"
+	"slices"
+)
+
+type VariantDefinitionCommand struct {
+	Width   *int
+	Height  *int
+	Fit     string
+	Format  string
+	Quality *int
+}
+
+func (c VariantDefinitionCommand) settings(encodable []image.VariantFormat) (image.VariantSettings, error) {
+	settings, err := image.VariantSettings{
+		Width:   c.Width,
+		Height:  c.Height,
+		Fit:     image.VariantFit(c.Fit),
+		Format:  image.VariantFormat(c.Format),
+		Quality: c.Quality,
+	}.Normalized()
+	if err != nil {
+		return image.VariantSettings{}, err
+	}
+	if !slices.Contains(encodable, settings.Format) {
+		return image.VariantSettings{}, image.ErrVariantFormatUnavailable
+	}
+	return settings, nil
+}