feat: url based multi-format loaders/decoders

internal/data/encoder.go

@@ -0,0 +1,38 @@
+package data
+
+import (
+	"io"
+	"net/url"
+
+	"github.com/pkg/errors"
+)
+
+type EncoderHandler interface {
+	URLMatcher
+	Encode(url *url.URL, data interface{}) (io.Reader, error)
+}
+
+type Encoder struct {
+	handlers []EncoderHandler
+}
+
+func (e *Encoder) Encode(url *url.URL, data interface{}) (io.Reader, error) {
+	for _, h := range e.handlers {
+		if !h.Match(url) {
+			continue
+		}
+
+		reader, err := h.Encode(url, data)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		return reader, nil
+	}
+
+	return nil, errors.Wrapf(ErrHandlerNotFound, "could not find matching handler for url '%s'", url.String())
+}
+
+func NewEncoder(handlers ...EncoderHandler) *Encoder {
+	return &Encoder{handlers}
+}