feat: cli versions

internal/cli/codec.go

@@ -0,0 +1,55 @@
+package cli
+
+import (
+	"fmt"
+
+	"git.maximhutz.com/max/lambda/pkg/codec"
+)
+
+type Codec interface {
+	codec.Codec[Repr, Repr]
+
+	InType() string
+	OutType() string
+}
+
+type convertedCodec[T, U any] struct {
+	codec           codec.Codec[T, U]
+	inType, outType string
+}
+
+func (c convertedCodec[T, U]) Decode(r Repr) (Repr, error) {
+	u, ok := r.Data().(U)
+	if !ok {
+		return nil, fmt.Errorf("could not parse '%v' as '%s'", r, c.inType)
+	}
+
+	t, err := c.codec.Decode(u)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewRepr(c.outType, t), nil
+}
+
+func (c convertedCodec[T, U]) Encode(r Repr) (Repr, error) {
+	t, ok := r.Data().(T)
+	if !ok {
+		return nil, fmt.Errorf("could not parse '%v' as '%s'", t, c.outType)
+	}
+
+	u, err := c.codec.Encode(t)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewRepr(c.inType, u), nil
+}
+
+func (c convertedCodec[T, U]) InType() string { return c.inType }
+
+func (c convertedCodec[T, U]) OutType() string { return c.outType }
+
+func ConvertCodec[T, U any](e codec.Codec[T, U], inType, outType string) Codec {
+	return convertedCodec[T, U]{e, inType, outType}
+}