re-add dest generate

dest.go

@@ -0,0 +1,54 @@
+package goSam
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func validateKindInner(kind string) string {
+	if strings.HasPrefix(kind, "SIGNATURE_TYPE=") {
+		return kind
+	}
+	return "SIGNATURE_TYPE=" + kind
+}
+
+func validateKind(kind string) (string, error) {
+	//convert kind to int
+	kint, err := strconv.Atoi(kind)
+	if err != nil {
+		for _, k := range SAMsigTypes {
+			if strings.HasSuffix(k, kind) {
+				return validateKindInner(kind), nil
+			}
+		}
+	}
+	if kint >= 0 && kint <= 7 {
+		return validateKindInner(kind), nil
+	}
+	return "SIGNATURE_TYPE=7", fmt.Errorf("Invalid sigType: %s", kind)
+}
+
+// Generate a new destination and return the base64 encoded string
+func (c *Client) NewDestination(kind ...string) (string, string, error) {
+	if len(kind) == 0 {
+		kind = []string{"7"}
+	} else {
+		var err error
+		kind[0], err = validateKind(kind[0])
+		if err != nil {
+			if c.debug {
+				fmt.Println(err)
+			}
+		}
+	}
+	r, err := c.sendCmd("DEST GENERATE %s\n", kind[0])
+	if err != nil {
+		return "", "", err
+	}
+	if r.Topic != "DEST" {
+		return "", "", fmt.Errorf("NewDestination Unknown Reply: %+v\n", r)
+	}
+	return r.Pairs["PRIV"], r.Pairs["PUB"], nil
+
+}