Move code to pkg

pkg/provider/label/parser.go

@@ -0,0 +1,58 @@
+package label
+
+import (
+	"github.com/containous/traefik/pkg/config"
+	"github.com/containous/traefik/pkg/provider/label/internal"
+)
+
+// DecodeConfiguration Converts the labels to a configuration.
+func DecodeConfiguration(labels map[string]string) (*config.Configuration, error) {
+	conf := &config.Configuration{
+		HTTP: &config.HTTPConfiguration{},
+		TCP:  &config.TCPConfiguration{},
+	}
+
+	err := Decode(labels, conf, "traefik.http", "traefik.tcp")
+	if err != nil {
+		return nil, err
+	}
+
+	return conf, nil
+}
+
+// EncodeConfiguration Converts a configuration to labels.
+func EncodeConfiguration(conf *config.Configuration) (map[string]string, error) {
+	return Encode(conf)
+}
+
+// Decode Converts the labels to an element.
+// labels -> [ node -> node + metadata (type) ] -> element (node)
+func Decode(labels map[string]string, element interface{}, filters ...string) error {
+	node, err := internal.DecodeToNode(labels, filters...)
+	if err != nil {
+		return err
+	}
+
+	err = internal.AddMetadata(element, node)
+	if err != nil {
+		return err
+	}
+
+	err = internal.Fill(element, node)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Encode Converts an element to labels.
+// element -> node (value) -> label (node)
+func Encode(element interface{}) (map[string]string, error) {
+	node, err := internal.EncodeToNode(element)
+	if err != nil {
+		return nil, err
+	}
+
+	return internal.EncodeNode(node), nil
+}