2-add-keyword-support (#6)

More development.

More types.
Fixed attribute groups in requests.
Started on client.
Saving data to file.

More types. Printing from chromeos works a little bit.

More types.

Spelling corrections.

WIP: Fix keyword handling

Move request to a separate file and add test.

Co-authored-by: Henrik Sölver <henrik.solver@gmail.com>
Reviewed-on: #6
Co-Authored-By: henrik <henrik.solver@gmail.com>
Co-Committed-By: henrik <henrik.solver@gmail.com>

packages/ipp/keyword.go

@@ -1,45 +1,33 @@
 package ipp
 
-import "io"
-
 type keyWord struct {
-	name   string
-	values []string
+	sos *setOfStrings
 }
 
-func newKeyWord() *keyWord {
+func NewKeyWord(name string, values ...string) *keyWord {
+
 	k := new(keyWord)
+	k.sos = NewSetOfStrings(name, keyWordValueTag, values)
 	return k
 }
 
-func (k *keyWord) string() string {
-	return "a uriValue"
-}
-func (k *keyWord) valueTag() tag {
-	return keyWordValueTag
-}
-
-func (k *keyWord) unmarshal(byteStream io.Reader) {
-
-}
-
-func (k *keyWord) marshal() []byte {
-	return []byte{}
-}
-
-func (k *keyWord) addValue(v string) {
-	k.values = append(k.values, v)
+func (k keyWord) String() string {
+	return k.sos.String()
 }
 
 func (k *keyWord) size() int {
-	l := 1 + 2 // The value tag (0x44) + name-length field (2 bytes)
-	l += len(k.name)
-	l += 2 // value-length field (2 bytes)
-	l += len(k.values[0])
-	// Add all additional values
-	for _, v := range k.values[1:] {
-		l += 1 + 4 // The value tag (0x44) + 2 length fields (2 bytes)
-		l += len(v)
-	}
-	return l
+	return k.sos.size()
 }
+
+func (k *keyWord) valueTag() tag {
+	return k.sos.valueTag()
+}
+
+func (k *keyWord) marshal() []byte {
+	return k.sos.marshal()
+}
+
+func (k *keyWord) addValue(v string) {
+	k.sos.AddValue(v)
+}
+