Use custom identifiers

model/identifier.go

@@ -0,0 +1,31 @@
+package reveil
+
+import (
+	"encoding/base64"
+	"errors"
+)
+
+type Identifier []byte
+
+func (i *Identifier) ToString() string {
+	return base64.RawURLEncoding.EncodeToString(*i)
+}
+
+func (i *Identifier) MarshalJSON() (dst []byte, err error) {
+	dst = make([]byte, base64.RawURLEncoding.EncodedLen(len(*i)))
+	base64.RawURLEncoding.Encode(dst, *i)
+	dst = append([]byte{'"'}, dst...)
+	dst = append(dst, '"')
+	return
+}
+
+func (i *Identifier) UnmarshalJSON(src []byte) error {
+	if len(src) < 2 || src[0] != '"' || src[len(src)-1] != '"' {
+		return errors.New("Unvalid character found to encapsulate the JSON value")
+	}
+
+	*i = make([]byte, base64.RawURLEncoding.DecodedLen(len(src)-2))
+	_, err := base64.RawURLEncoding.Decode(*i, src[1:len(src)-1])
+
+	return err
+}