Identify langage if no language map is provided by user

main.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"strings"
 	"./trans"
+	"./identify"
 	"github.com/deanishe/awgo"
 	"regexp"
 )
@@ -21,6 +22,9 @@ func main() {
 
 func run() {
 	word, fromLang, toLang := parseProgramArgs(os.Args)
+	if fromLang == "" && toLang == "" {
+		fromLang, toLang = decideWhatLanguagesToUse(word)
+	}
 
 	translations := trans.New(word, fromLang, toLang).Translate()
 	for _, translation := range translations {
@@ -52,3 +56,15 @@ func isTransLanguageSpecifier(arg string) bool {
 	ok, _ := regexp.MatchString("(\\w{2})?:(\\w{2})?", os.Args[1])
 	return ok
 }
+
+func decideWhatLanguagesToUse(word string) (string, string) {
+	fromLang := identify.New(word).Identify()
+	toLang := map[string]string{
+		"en": "hu",
+		"hu": "en",
+	}[fromLang]
+	if toLang == "" {
+		toLang = "en"
+	}
+	return fromLang, toLang
+}