feat: image variants engine

internal/domain/image/variantRepositoryInterface.go

@@ -0,0 +1,31 @@
+package image
+
+import "io"
+
+type VariantRepository interface {
+	List() ([]Variant, error)
+	Get(name string) (Variant, error)
+	Create(variant Variant) (Variant, error)
+	Update(variant Variant) (Variant, error)
+	Delete(name string) error
+}
+
+type VariantFileRepository interface {
+	Find(variantName string, sourceName string) (VariantFile, bool, error)
+	Save(file VariantFile) (VariantFile, error)
+	ListByVariant(variantName string) ([]VariantFile, error)
+	ListBySource(sourceName string) ([]VariantFile, error)
+	Delete(id uint32) error
+	Totals() (map[string]VariantFileTotals, error)
+}
+
+type RenderedVariant struct {
+	Content     []byte
+	ContentType string
+}
+
+type VariantRenderer interface {
+	DeclaredSize(source io.Reader) (width int, height int, err error)
+	Render(source io.Reader, settings VariantSettings) (RenderedVariant, error)
+	EncodableFormats() []VariantFormat
+}