Move logic to separate package

trans/trans.go

@@ -0,0 +1,66 @@
+package trans
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+	"log"
+)
+
+
+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",
+		fmt.Sprintf("%s:%s", tj.fromLang, tj.toLang),
+		tj.word,
+	}
+	return exec.Command("trans", config...).Output()
+}
+
+func parseTransOutput(out string) []string {
+	outLines := strings.Split(out, "\n")
+	translation := outLines[0]
+
+	additionalTranslations := strings.Split(outLines[len(outLines)-2], ",")
+	for i, translation := range additionalTranslations {
+		additionalTranslations[i] = strings.TrimSpace(translation)
+	}
+
+	return append([]string{translation}, additionalTranslations...)
+}
+
+func uniqueSlice(items []string) []string {
+    encountered := map[string]bool{}
+
+    uniqueSlice := []string{}
+    for _, item := range items {
+        if !encountered[item] {
+            encountered[item] = true
+            uniqueSlice = append(uniqueSlice, item)
+        }
+    }
+
+    return uniqueSlice
+}