Write compressed ContactCard

contactcard.go

@@ -7,6 +7,7 @@ import (
 	"image"
 	"image/color"
 	"image/png"
+	"io/ioutil"
 	"log"
 	"math"
 	"os"
@@ -53,6 +54,18 @@ func (contact *ContactCard) Compress() ([]byte, error) {
 	return b.Bytes(), nil
 }
 
+func (contact *ContactCard) WriteCompressed(filename string) error {
+	out, err := contact.Compress()
+	if err != nil {
+		return err
+	}
+	err = ioutil.WriteFile(filename, out, 0600)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 func (contact *ContactCard) WritePng(filename string) {
 	out, err := proto.Marshal(contact)
 	if err != nil {