feat: translator

translator/google/v3.go

@@ -0,0 +1,40 @@
+package google
+
+import (
+	"context"
+	"fmt"
+
+	translateV3 "cloud.google.com/go/translate/apiv3"
+	"cloud.google.com/go/translate/apiv3/translatepb"
+	"google.golang.org/api/option"
+)
+
+func (t *Translator) TranslateV3(source, sourceLang, targetLang string) (string, error) {
+	ctx := context.Background()
+
+	if t.clientV3 == nil {
+		client, err := translateV3.NewTranslationClient(ctx, option.WithAPIKey(t.options.apiKey))
+		if err != nil {
+			return "", fmt.Errorf("NewTranslationClient: %w", err)
+		}
+		t.clientV3 = client
+	}
+
+	req := &translatepb.TranslateTextRequest{
+		SourceLanguageCode: sourceLang,
+		TargetLanguageCode: targetLang,
+		MimeType:           "text/plain", // Mime types: "text/plain", "text/html"
+		Contents:           []string{source},
+	}
+
+	resp, err := t.clientV3.TranslateText(ctx, req)
+	if err != nil {
+		return "", fmt.Errorf("TranslateText: %w", err)
+	}
+
+	if len(resp.GetTranslations()) != 1 {
+		return "", fmt.Errorf("TranslateText: %w", err)
+	}
+
+	return resp.GetTranslations()[0].GetTranslatedText(), nil
+}