Refactor translation

trans.go

@@ -5,26 +5,41 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"log"
 )
 
 func main() {
-	outBytes, err := execTrans(os.Args[1])
+	results := New(os.Args[1], "en", "hu").Translate()
-	if err != nil {
+	fmt.Println(strings.Join(results, "\n"))
-		panic(err)
-	}
-	translations := parseTransOutput(string(outBytes))
-	fmt.Println(strings.Join(uniqueSlice(translations), "\n"))
 }
 
-func execTrans(input string) ([]byte, error) {
+type transJob struct {
+	word string
+	fromLang string
+	toLang string
+}
+
+func New(word, fromLang, toLang string) transJob {
+	return transJob{word: word, fromLang: fromLang, toLang: toLang}
+}
+
+func (tj transJob) Translate() []string {
+	outBytes, err := tj.execTrans()
+	if err != nil {
+		log.Fatal("Failed to execute command 'trans'!")
+	}
+	return uniqueSlice(parseTransOutput(string(outBytes)))
+}
+
+func (tj transJob) execTrans() ([]byte, error) {
 	config := []string{
 		"-show-original", "n",
 		"-show-original-phonetics", "n",
 		"-show-dictionary", "n",
 		"-show-languages", "n",
 		"-show-prompt-message", "n",
-		"hu:en",
+		fmt.Sprintf("%s:%s", tj.fromLang, tj.toLang),
-		input,
+		tj.word,
 	}
 	return exec.Command("trans", config...).Output()
 }